4.2

C

• Additions
  • Added physics support
    • Added spPhysicsConstraintTimeline and spPhysicsConstraintResetTimeline
    • Added spPhysics to be passed to spSkeleton_updateWorldTransform()
    • Added spSkeletonData_findPhysicsConstraint() to query a physics constraint by name
    • Added spSkeleton_findPhysicsConstraint() to query a physics constraint by name
    • Added spSkeleton_physicsTranslate() to translate all physics constraints by some distances in the skeleton coordinate system
    • Added spSkeleton_physicsRotate() to rotate all physics constraints by some distances in the skeleton coordinate system
    • Added spSkeleton::time to keep track of time for physics simulations
    • See also breaking changes for spSkeleton_updateWorldTransform() and the requirement to call spSkeleton_update() to advance pyhsics each frame.
  • Added spInheritTimeline
  • Added spTrackEntry::alphaAttachmentThreshold
  • Removed const qualifiers where appropriate
  • Added spTrackEntry_setMixDuration() to set the mix duration in conjunction with a delay
  • Added spTrackEntry_wasApplied() to check if the entry has been applied
  • Added spBone_worldToParent() to transform coordinates from world space to the parent space of a bone
  • Added spBone_localToParent() to transform coordinates from a bone's local space to its parent space
  • Added non essential fields icon and visible to spBoneData
  • Added non essential fields path and visible to spSlotData
• Breaking changes
  • Renamed spTrackEntry::attachmentThreshold to spTrackEntry::mixAttachmentThreshold
  • Renamed spTrackEntry::drawOrderThreshold to spTrackEntry::mixDrawOrdertThreshold
  • Renamed spTransformMode to spInherit and all SP_TRANSFORMMODE_* enums to SP_INHERIT_*
  • Changed spMeshAttachment::edges from int * to unsigned short *
  • You must call spSkeleton_update(delta) before calling spSkeleton_updateWorldTransform() if the frame time has advanced. This is needed to update physics accordingly
  • spSkeleton_updateWorldTransform() takes an additional spPhysics parameter. See the spPhysics documentation for information on what the different enum values do

SFML

• Added physics examples
• SkeletonDrawable::update() now takes an additional spPhysics physics parameter that specifies how physics should be updated

SDL

• spSkeletonDrawable_update() now takes an additional spPhysics physics parameter that specifies how physics should be updated

C++

• Added physics support
  • Added PhysicsConstraintXXXTimeline and PhysicsConstraintResetTimeline
  • Added Physics to be passed to Skeleton::updateWorldTransform()
  • Added SkeletonData::findPhysicsConstraint() and SkeletonData::getPhysicsConstraints() to query physics constraints
  • Added Skeleton::findPhysicsConstraint() and Skeleton::getPhysicsConstraints() to query physics constraints
  • Added Skeleton::physicsTranslate() to translate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton::physicsRotate() to rotate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton::time to keep track of time for physics simulations
  • See also breaking changes for Skeleton::updateWorldTransform() and the requirement to call Skeleton::update() to advance pyhsics each frame.
• Added InheritTimeline
• Added TrackEntry::_alphaAttachmentThreshold
• Added TrackEntry::setMixDuration() to set the mix duration in conjunction with a delay
• Added TrackEntry::wasApplied() to check if the entry has been applied
• Added Bone::worldToParent() to transform coordinates from world space to the parent space of a bone
• Added Bone::localToParent() to transform coordinates from a bone's local space to its parent space
• Added non essential fields icon and visible to BoneData
• Added non essential fields path and visible to SlotData
• Added setToSetupPose() to all contraint classes
• Breaking changes
  • Renamed TrackEntry::attachmentThreshold to TrackEntry::mixAttachmentThreshold
  • Renamed TrackEntry::drawOrderThreshold to TrackEntry::mixDrawOrdertThreshold
  • Renamed TransformMode to Inherit and all TransformMode_* enums to Inherit_*
  • You must call Skeleton::update(delta) before calling Skeleton::updateWorldTransform() if the frame time has advanced. This is needed to update physics accordingly
  • Skeleton::updateWorldTransform() takes an additional Physics parameter. See the Physics documentation for information on what the different enum values do
  • All Updatable sub-classes like Bone and constraints now take an additional Physics parameter for their update() methods

Cocos2d-x

• Added physics example
• Improved build system and build documentation

SFML

• SkeletonDrawable::update() now takes an additional Physics physics parameter that specifies how physics should be updated

SDL

• SkeletonDrawable::update() now takes an additional Physics physics parameter that specifies how physics should be updated

UE4

• Breaking: Renamed runtime folder from spine-ue4 to spine-ue
• Breaking: Renamed plugin SpinePlugin. You must update your project's Build.cs file accordingly
• Breaking: Starting with Unreal Engine 5.3 imported .skel/.json and .atlas files in the same folder must NOT have a common prefix. E.g. skeleton.json and skeleton.atlas will not work. Make sure to rename at least one of the two files so there is no prefix collision, e.g. skeleton-data.json and skeleton.atlas.
• Added compatibility with UE 5.3
• Added more example maps
• Added blueprint-callable methods PhysicsTranslate(), PhysicsRotate() and ResetPhysicsConstraints() (which will reset all physics constraints in the skeleton) to SpineSkeletonComponent and SpineWidget.

Godot

• Breaking: Renamed TrackEntry.set_attachment_threshold and TrackEntry.get_attachment_threshold to TrackEntry.set_mix_attachment_threshold and TrackEntry.get_mix_attachment_threshold
• Breaking: Renamed TrackEntry.set_draw_order_threshold and TrackEntry.get_draw_order_threshold to TrackEntry.set_mix_draw_order_threshold and TrackEntry.get_mix_draw_order_threshold
• BReaking: SpineSkeleton.update_world_transform takes an additional physics parameter that specifies how physics should be updated
• Added compatibility for Godot 4.1, 4.2 and C#, see builds at https://esotericsoftware.com/spine-godot
• Added physics examples
• Added SpineBone.world_to_parent to transform coordinates from world space to the parent space of a bone
• Added SpineBone.local_to_parent to transform coordinates from a bone's local space to its parent space
• Physics support
  • Added SpineBone.get_inherit/SpineBone.set_inherit
  • Added SpinePhysicsConstraint and SpinePhysicsConstraintData
  • Added SpineSkeleton.update() to advance the physics time
  • ADded SpineSkeleton.get_time/SpineSkeleton.set_time to access the physics time
  • Added SpineSkeleton.physics_translate() to translate all physics constraints by some distances in the skeleton coordinate system
  • Added SpineSkeleton.physics_rotate() to rotate all physics constraints by some distances in the skeleton coordinate system
  • Added SpineSkeleotnDataResource.set_reference_scale/SpineSkeletonDataResource.get_reference_scale to access the reference scale of the loaded skeleton data
• Added TrackEntry.set_alpha_attachment_threshold
• Added TrackEntry.set_mix_duration_and_delay() to set the mix duration in conjunction with a delay
• Added TrackEntry::was_applied() to check if the entry has been applied

C

• Additions

  • Added TrackEntry.AlphaAttachmentThreshold.

• Breaking changes

  • Renamed TrackEntry AttachmentThreshold to MixAttachmentThreshold, renamed DrawOrderThreshold to MixDrawOrderThreshold.
  • Changed signature of Skeleton.UpdateWorldTransform() to UpdateWorldTransform(Skeleton.Physics physics). The default replacement for skeleton.UpdateWorldTransform() calls is skeleton.UpdateWorldTransform(Skeleton.Physics.Update). If you are certain that a subsequent call to skeleton.UpdateWorldTransform(Skeleton.Physics.Update) follows in the same frame, you can pass Skeleton.Physics.Pose as argument instead of Skeleton.Physics.Update.

Unity

• Officially supported Unity versions are 2017.1-6000.0.

• Additions

  • OnPostProcessVertices callback parameter MeshGeneratorBuffers now provides access to uv2Buffer and uv3Buffer properties of MeshGenerator, automatically allocating buffers upon access if tintBlack is disabled. This allows for passing own vertex data to a shader on second and third uv channels.
  • Added Spine/SkeletonGraphic Grayscale shader to provide a basic grayscale shader for SkeletonGraphic as well. SkeletonGraphic Material SkeletonGraphicDefaultGrayscale uses this shader and can be assigned at SkeletonGraphic components as usual.
  • SkeletonGraphic now supports automatic scaling based on its RectTransform bounds. Automatic scaling can be enabled by setting the added Layout Scale Mode Inspector property to either Width Controls Height, Height Controls Width, FitInParent or EnvelopeParent. It is set to None by default to keep previous behaviour and avoid breaking existing projects. To modify the reference layout bounds, hit the additional Edit Layout Bounds toggle button to switch into edit mode, adjust the bounds or hit Match RectTransform with Mesh, and hit the button again when done adjusting. The skeleton will now be scaled accordingly to fit the reference layout bounds to the object's RectTransform.
  • Added previously missing unlit URP 2D shader variant, available under Universal Render Pipeline/2D/Spine/Skeleton.
  • Added support for light cookies at Universal Render Pipeline/Spine/Sprite shader.
  • Timeline extension package: An additional Spine preferences parameter Timeline - Default Mix Duration has been added, setting newly added SpineAnimationStateClip clips accordingly, defaults to false. This Spine preferences parameter can be enabled to default to the previous behaviour before this update.
  • Tint Black: Added support for Tint Black functionality at all Spine URP shaders (2D and 3D shaders) and at all standard pipeline Spine/Sprite shaders. This feature can be enabled via the Tint Black material parameter in the Inspector. Note: The URP Sprite shaders provided in the Spine URP Shaders extension UPM package require the latest version of the spine-unity runtime (package version 4.1.12, 2023-05-31 or newer) to display the added material parameters in the Inspector GUI.
  • Added SkeletonGraphic.MeshScale property to allow access to calculated mesh scale. MeshScale is based on (1) Canvas pixels per unit, and (2) RectTransform bounds when using Layout Scale Mode other than None at SkeletonGraphic which scales the skeleton mesh to fit the parent RectTransform bounds accordingly.
  • Added updateSeparatorPartScale property to SkeletonGraphic to let render separator parts follow the scale (lossy scale) of the SkeletonGraphic GameObject. Defaults to false to maintain existing behaviour.
  • Added experimental EditorSkeletonPlayer component to allow Editor playback of the initial animation set at SkeletonAnimation or SkeletonGraphic components. Add this component to your skeleton GameObject to enable the in-editor animation preview. Allows configurations for continuous playback when selected, deselected, and alternative single-frame preview by setting Fixed Track Time to any value other than 0. Limitations: At skeletons with variable material count the Inspector preview may be too unresponsive. It is then recommended to disable the EditorSkeletonPlayer component (at the top of the Inspector) to make it responsive again, then you can disable Play When Selected and re-enable the component to preview playback only when deselected.
  • Added example component RenderCombinedMesh to render a combined mesh of multiple meshes or submeshes. This is required by OutlineOnly shaders to render a combined outline when using SkeletonRenderSeparator or multiple atlas pages which would normally lead to outlines around individual parts. To add a combined outline to your SkeletenRenderer:
    1. Add a child GameObject and move it a bit back (e.g. position Z = 0.01).
    2. Add a RenderCombinedMesh component, provided in the Spine Examples/Scripts/Sample Components directory.
    3. Copy the original material, add _Outline to its name and set the shader to your outline-only shader like Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly or Spine/Outline/OutlineOnly-ZWrite.
    4. Assign this _Outline material at the new child GameObject's MeshRenderer component. If you are using SkeletonRenderSeparator and need to enable and disable the SkeletonRenderSeparator component at runtime, you can increase the RenderCombinedMesh Reference Renderers array by one and assign the SkeletonRenderer itself at the last entry after the parts renderers. Disabled MeshRenderer components will be skipped when combining the final mesh, so the combined mesh is automatically filled from the desired active renderers.
  • Timeline extension package: Added static EditorEvent callback to allow editor scripts to react to animation events outside of play-mode. Register to the events via Spine.Unity.Playables.SpineAnimationStateMixerBehaviour.EditorEvent += YourCallback;.
  • URP Shaders: Added Depth Write property to shaders Universal Render Pipeline/Spine/Skeleton and Universal Render Pipeline/Spine/Skeleton Lit. Defaults to false to maintain existing behaviour.
  • Added Animation Update mode (called UpdateTiming in code) In Late Update for SkeletonAnimation, SkeletonMecanim and SkeletonGraphic. This allows you to update the SkeletonMecanim skeleton in the same frame that the Mecanim Animator updated its state, which happens between Update and LateUpdate.
  • URP Shaders: Added URP "Blend Mode" shader variants for both URP 3D and URP 2D renderers. They are listed under shader name "Universal Render Pipeline/Spine/Blend Modes/" and "Universal Render Pipeline/2D/Spine/Blend Modes/" respectively.
  • URP Shaders: Added support for Tint Black functionality at "Blend Modes" Spine URP shaders (2D and 3D shaders).
  • PhysicsConstraints: Skeleton GameObjects now automatically apply Transform translation and rotation to the skeleton's PhysicsConstraints. You can disable applying translation or rotation at the Skeleton component Inspector under Advanced - Physics Inheritance by setting Position to (0,0)and Rotation to 0, or by setting the properties physicsPositionInheritanceFactor to Vector2.zero and physicsRotationInheritanceFactor to 0 at the skeleton component via code.
  • Added Physics Constraints example scene (located in Spine Examples/Other Examples) together with celestial-circus example skeleton assets. This scene demonstrates Transform movement automatically affecting physics constraints of a skeleton.
  • PhysicsConstraints: Skeleton components now allow you to use relative instead of world-space Transform movement by assigning a Transform (typically the parent) to the new Movement relative to property. Leave this property at null (the default) to use world-space Transform movement for physics.
  • PhysicsConstraints: Added Spine Preferences settings Editor Instantiation - Physics Inheritance - Default Position and Default Rotation to initialize skeletons physics settings with the desired Transform position and rotation inheritance factors when added to a scene via drag-and-drop.
  • SkeletonGraphic: Added Tint Black blend mode shaders Spine/SkeletonGraphic Tint Black Additive, Spine/SkeletonGraphic Tint Black Multiply and Spine/SkeletonGraphic Tint Black Screen.
  • SkeletonGraphic: Added pre-defined SkeletonGraphic material sets for main workflow parameters in folders spine-unity/Materials instead of requiring manual copies: SkeletonGraphic-PMATexture containing materials for premultiplied-alpha texture workflow (Straight Alpha Texture disabled) and SkeletonGraphic-StaightAlphaTexture containing materials for straight alpha texture workflow (Straight Alpha Texture enabled). These directories contain a set of materials with CanvasGroup Compatible disabled for usage with Advanced - PMA Vertex Color enabled at the component. Each directory also provides a subdirectory CanvasGroupCompatible with materials with CanvasGroup Compatible enabled for usage with CanvasGroup alpha (requiring Advanced - PMA Vertex Color disabled at the component).
  • SkeletonGraphic: Added auto-detect functionality for parameters Advanced - Tint Black, CanvasGroup Compatible and PMA Vertex Color. If unsure which settings are correct, hit the Detect button next to each parameter, in top to bottom order, or the Detect Settings to detect all three. Also added automatic material assignment via a Detect Material button in the Advanced section and a Detect button next to the Material property at the top of the component Inspector, as well as next to the Blend Mode Materials section when using multiple canvas renderers with blend modes. The suitable material is selected based on these three settings, combined with texture settings (PMA or straight alpha texture settings). If you receive incorrect results, likely your texture settings are incorrectly setup for your PMA or Straight alpha texture export settings.
  • SkeletonRenderTexture example components now provide a shaderPasses parameter to customize which passes are rendered to the RenderTexture. It defaults to -1 for all passes to keep the existing behaviour. You might want to set it to 0 to only render the first pass e.g. to avoid issues when using a URP shader at the original skeleton.
  • SkeletonGraphicRenderTexture example component now also received a quadMaterial property, defaulting to the newly added Material asset RenderQuadGraphicMaterial which applies proper premultiplied-alpha blending of the render texture. The quadMaterial member variable was moved from SkeletonRenderTexture to the common base class SkeletonRenderTextureBase.
  • All Spine Outline shaders, including the URP outline shader, now provide an additional parameter Width in Screen Space. Enable it to keep the outline width constant in screen space instead of texture space. Requires more expensive computations, so enable only where necessary. Defaults to disabled to maintain existing behaviour.
  • Added support for BlendModeMaterials at runtime instantiation from files via an additional method SkeletonDataAsset.SetupRuntimeBlendModeMaterials. See example scene Spine Examples/Other Examples/Instantiate from Script for a usage example.
  • SkeletonGraphic: You can now offset the skeleton mesh relative to the pivot via a newly added green circle handle. This allows you to e.g. frame only the face of a skeleton inside a masked frame. Previously offsetting the pivot downwards fails when Layout Scale Mode scales the mesh smaller and towards the pivot (e.g. the feet) and thus out of the frame. Now you can keep the pivot in the center of the RectTransform while offsetting only the mesh downwards, keeping the desired skeleton area (e.g. the face) centered while resizing. Moving the new larger green circle handle moves the mesh offset, while moving the blue pivot circle handle moves the pivot as usual.
  • Universal Render Pipeline/Spine/Skeleton shader now performs proper alpha-testing when Depth Write is enabled, using the existing Shadow alpha cutoff parameter.
  • SkeletonRootMotion components now provide a public Initialize() method which is automatically called when calling skeletonAnimation.Initialize(true) to update the necessary skeleton references. If a different root bone shall be used, be sure to set skeletonRootMotion.rootMotionBoneName before calling skeletonAnimation.Initialize(true).
  • Skeleton Mecanim: Added new Mix Mode Match. When selected, Spine animation weights are calculated to best match the provided Mecanim clip weights. This mix mode is recommended on any layer using blend tree nodes.
  • URP Shaders: Added ZWrite variant of outline shader Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly ZWrite. Suitable for e.g. depth of field (DoF) effect where writing to the depth buffer is required. Note that for DoF effect, Render Queue needs to be set to Alpha Test.
  • SkeletonGraphic: Exposed SetScaledPivotOffset as public method outside of the editor to support programatically moving mesh offsets at runtime based on mesh bounds.
  • SkeletonMecanim: Added Scene Preview option to preview an Animation Clip for e.g. easier event placement. When enabled, the Animation Clip selected in the Animation window is previewed in the Scene and Game views. Lock the SkeletonMecanim Inspector window, open the Animation window and select the Animation Clip. Then in the Animation window scrub through the timeline to see the current animation frame previewed.
  • Universal Render Pipeline/Spine/Skeleton Lit shader now supports Adaptive Probe Volumes (APV) introduced in Unity 6. The shader also provides a new material property APV per Pixel to either calculate APV lighting contribution per pixel (the default) or per vertex.
  • Universal Render Pipeline/Spine/Sprite shader now also supports Adaptive Probe Volumes (APV) introduced in Unity 6. APV lighting contribution is automatically calculated per pixel.
  • All Spine Outline shaders, including the URP outline shaders, now provide an additional parameter Fill. Enable it to also fill the opaque area inside the outline with the outline color. Prevents a semi-transparent gap between outline and skeleton. Defaults to disabled to maintain existing behaviour.
  • Added example component RenderExistingMeshGraphic (similar to RenderExistingMesh) to render a SkeletonGraphic mesh again with different materials. This might be required by e.g. URP and SkeletonGraphic outline shaders skipping additional render passes. To add a second outline variant of your SkeletonGraphic:
    1. Add a GameObject at the same hierarchy level as the reference SkeletonGraphic and move it before the reference SkeletonGraphic to render behind.
    2. Add a RenderExistingMeshGraphic component.
    3. In the RenderExistingMeshGraphic component Inspector at Reference Skeleton Graphic assign the original SkeletonGraphic object.
    4. At Replacement Material assign e.g. the included SkeletonGraphicDefaultOutline material to replace all materials with this material. Alternatively, if Multiple CanvasRenderers is enabled at the reference SkeletonGraphic, you can add entries to the Replacement Materials list and at each entry assign the original SkeletonGraphic material (e.g. SkeletonGraphicDefault) to be replaced and the respective Replacement Material (e.g. SkeletonGraphicDefaultOutline).

• Breaking changes

  • Changed SpineShaderWithOutlineGUI outline related methods from private to protected virtual to allow for custom shader GUI subclasses to switch to different outline shaders.
  • Changed BoneFollower and BoneFollowerGraphic methods LateUpdate and Initialize to virtual to allow easier overriding for e.g. positional offset in custom subclasses.
  • MeshGenerator received a new optimization option to avoid rendering fully transparent attachments at slot alpha 0 by default. Comment out #define SLOT_ALPHA_DISABLES_ATTACHMENT in MeshGenerator.cs to revert to previous behaviour. You may only need this option disabled when utilizing a custom shader which uses vertex color alpha for purposes other than transparency.
  • PhysicsConstraints: bool properties ApplyTranslationToPhysics and ApplyRotationToPhysics were changed to Vector2 PhysicsPositionInheritanceFactor and float PhysicsRotationInheritanceFactor to allow the Transform movement the be scaled by a factor before being applied to the skeleton. You can set the properties to Vector2.zero and 0 respectively to disable applying any Transform movement at all. The Advanced Inspector section Physics Constraints was renamed to Physics Inheritance, the properties in the section are now called Position and Rotation.
  • SkeletonGraphic Materials: Since the addition of new material sets for the CanvasGroupCompatible parameters, the default SkeletonGraphic materials all have CanvasGroup Compatible disabled. Please assign the respective material from the CanvasGroupCompatible material subdirectory if you want CanvasGroup Compatible enabled at your SkeletonGraphic.
  • SkeletonGraphic: The parameter SkeletonGraphic.MeshGenerator.settings.canvasGroupTintBlack was changed to canvasGroupCompatible to help with auto-detecting correct Vertex Data and Material settings. Set the parameter to true if the SkeletonGraphic component is located below a CanvasGroup component. The parameter value is automatically migrated from canvasGroupTintBlack.
  • Inspector: String attribute SpineSkin() now allows to include <None> in the list of parameters. Previously the includeNone=true parameter of the SpineSkin() attribute defaulted to true but was ignored. Now it defaults to false and has an effect on the list. Only the Inspector GUI is affected by this behaviour change.
  • SkeletonGraphicRenderTexture example component: protected RawImage quadRawImage was changed to protected SkeletonSubmeshGraphic quadMaskableGraphic for a bugfix. This is only relevant for subclasses of SkeletonGraphicRenderTexture or when querying the RawImage component via e.g. skeletonGraphicRenderTexture.quad.GetComponent<RawImage>().
  • Fixed a bug where when Linear color space is used and PMA vertex colors enabled, additive slots add a too dark (too transparent) color value. If you want the old incorrect behaviour (darker additive slots) or are not using Linear but Gamma color space, you can comment-out the define LINEAR_COLOR_SPACE_FIX_ADDITIVE_ALPHA in MeshGenerator.cs to deactivate the fix or just to skip unnecessary instructions.
  • Fixed SkeletonRootMotion components ignoring parent bone scale when set by transform constraints. Using applied scale of parent bone now. If you need the old behaviour, comment out the line #define USE_APPLIED_PARENT_SCALE in SkeletonRootMotionBase.cs.
  • Fixed SkeletonUtility callback update order when used with SkeletonRootMotion components so that the position when following a bone is updated after SkeletonRootMotion clears root-bone position. The order of SkeletonUtilityBone callbacks is changed to be later to achieve this. This is a breaking change in the unlikely case that you are using SkeletonRootMotion together with SkeletonUtility and subscribed to UpdateLocal, UpdateWorld or UpdateComplete yourself and relied on a certain callback order. One solution is to then resubscribe your own callback events accordingly by calling .UpdateLocal -= Callback; .UpdateLocal += Callback;.

• Changes of default values

• Deprecated

• Restructuring (Non-Breaking)

XNA/MonoGame

• Additions
  • Apply external movement to physics: If you are not directly modifying Skeleton.X or Skeleton.Y, you can apply external game object movement to skeleton physics as follows: Add a Vector2 lastPosition; member variable to your class interacting with the skeleton. Then call e.g. the following code each frame:

    Vector2 currentPosition = <current world position>;
    Vector2 externalPositionDelta = currentPosition - lastPosition;
    skeleton.PhysicsTranslate(externalPositionDelta.x, externalPositionDelta.y);
    lastPosition = currentPosition;

Java

• Added physics support
  • Added PhysicsConstraintXXXTimeline and PhysicsConstraintResetTimeline
  • Added Physics to be passed to Skeleton#updateWorldTransform()
  • Added SkeletonData#findPhysicsConstraint() and SkeletonData#getPhysicsConstraints() to query physics constraints
  • Added Skeleton#findPhysicsConstraint() and Skeleton#getPhysicsConstraints() to query physics constraints
  • Added Skeleton#physicsTranslate() to translate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton#physicsRotate() to rotate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton#time and respective setters/getters to keep track of time for physics simulations
  • See also breaking changes for Skeleton#updateWorldTransform() and the requirement to call Skeleton#update() to advance pyhsics each frame.
• Added InheritTimeline
• Added TrackEntry#alphaAttachmentThreshold
• Added TrackEntry#setMixDuration() to set the mix duration in conjunction with a delay
• Added TrackEntry#wasApplied() to check if the entry has been applied
• Added Bone#worldToParent() to transform coordinates from world space to the parent space of a bone
• Added Bone#localToParent() to transform coordinates from a bone's local space to its parent space
• Added non essential fields icon and visible to BoneData
• Added non essential fields path and visible to SlotData
• Added setToSetupPose() to all contraint classes
• Breaking changes
  • Renamed TrackEntry#attachmentThreshold to TrackEntry#mixAttachmentThreshold along with respective getters/settesr
  • Renamed TrackEntry::drawOrderThreshold to TrackEntry#mixDrawOrdertThreshold along with respective getters/settesr
  • Renamed TransformMode to Inherit and all TransformMode_* enums to Inherit_*
  • You must call Skeleton#update(delta) before calling Skeleton#updateWorldTransform() if the frame time has advanced. This is needed to update physics accordingly
  • Skeleton#updateWorldTransform() takes an additional Physics parameter. See the Physics documentation for information on what the different enum values do
  • All Updatable sub-classes like Bone and constraints now take an additional Physics parameter for their update() methods

libGDX

• Added physics examples

Typescript/Javascript

• Added physics support
  • Added PhysicsConstraintXXXTimeline and PhysicsConstraintResetTimeline
  • Added Physics to be passed to Skeleton#updateWorldTransform()
  • Added SkeletonData#findPhysicsConstraint() and SkeletonData#getPhysicsConstraints() to query physics constraints
  • Added Skeleton#findPhysicsConstraint() and Skeleton#getPhysicsConstraints() to query physics constraints
  • Added Skeleton#physicsTranslate() to translate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton#physicsRotate() to rotate all physics constraints by some distances in the skeleton coordinate system
  • Added Skeleton#time and respective setters/getters to keep track of time for physics simulations
  • See also breaking changes for Skeleton#updateWorldTransform() and the requirement to call Skeleton#update() to advance pyhsics each frame.
• Added InheritTimeline
• Added TrackEntry#alphaAttachmentThreshold
• Added TrackEntry#setMixDuration() to set the mix duration in conjunction with a delay
• Added TrackEntry#wasApplied() to check if the entry has been applied
• Added Bone#worldToParent() to transform coordinates from world space to the parent space of a bone
• Added Bone#localToParent() to transform coordinates from a bone's local space to its parent space
• Added non essential fields icon and visible to BoneData
• Added non essential fields path and visible to SlotData
• Added setToSetupPose() to all contraint classes
• Breaking changes
  • Renamed TrackEntry#attachmentThreshold to TrackEntry#mixAttachmentThreshold along with respective getters/settesr
  • Renamed TrackEntry::drawOrderThreshold to TrackEntry#mixDrawOrdertThreshold along with respective getters/settesr
  • Renamed TransformMode to Inherit and all TransformMode_* enums to Inherit_*
  • You must call Skeleton#update(delta) before calling Skeleton#updateWorldTransform() if the frame time has advanced. This is needed to update physics accordingly
  • Skeleton#updateWorldTransform() takes an additional Physics parameter. See the Physics documentation for information on what the different enum values do
  • All Updatable sub-classes like Bone and constraints now take an additional Physics parameter for their update() methods

WebGL backend

• Added physics examples

Canvas backend

CanvasKit backend

• Added spine-canvaskit runtime. See https://esotericsoftware.com/spine-canvaskit

Three.js backend

• Added physics support

Player

• Added physics support
• Added scale field to configuration which defines the scale to load the skeleton at
• Added updateWorldTransform field to configuration which expects a function that updates the skeleton. Defaults to player.skeleton.updateWorldTransform(spine.Physics.update)
• Added skeleton to SpinePlayerConfig to specify the URL of the skeleton .json or .skel file. Deprecated jsonURL and binaryURL. The old fields can still be used, but will be removed in Spine 4.3
• Added atlas to SpinePlayerConfig to specify the URL of the .atlas file. Deprecated atlasURL. The old field can still be used, but will be removed in Spine 4.3.

Pixi

• Added spine-pixi runtime, also backported to Spine 4.1. See https://esotericsoftware.com/spine-pixi

Phaser

• Added spine-phaser runtime, also backported to Spine 4.1. See https://esotericsoftware.com/spine-phaser

Haxe

• Added spine-haxe runtime, also backported to Spine 4.1. See https://esotericsoftware.com/spine-haxe

Flutter

• Added spine-flutter runtime, also backported to Spine 4.1. See https://esotericsoftware.com/spine-flutter

4.1

C

• Additions
  • Support for sequences.
  • Support for shortestRotation in animation state. See https://github.com/esotericsoftware/spine-runtimes/issues/2027.
  • Added CMake parameter SPINE_SANITIZE which will enable sanitizers on macOS and Linux.
  • Added SPINE_MAJOR_VERSION, SPINE_MINOR_VERSION, and SPINE_VERSION_STRING. Parsing skeleton .JSON and .skel files will report an error if the skeleton version does not match the runtime version.
• Breaking changes
  • spRegionAttachment and spMeshAttachment now contain a spTextureRegion* instead of encoding region fields directly.
  • sp_AttachmentLoader_newRegionAttachment() and spAttachmentLoader_newMeshAttachment() now take an additional Sequence* parameter.
  • spMeshAttachment_updateUVs() was renamed to spMeshAttachment_updateRegion().
  • spRegionAttachment_updateOffset() was renamed to spRegionAttachment_updateRegion(), spRegionAttachment_setUVs() was merged into spRegionAttachment_updateRegion().
  • spSlot_getAttachmentTime() and spSlot_setAttachmentTime() have been removed.
  • spVertexAttachment->deformAttachment was renamed to spVertexAttachment->timelineAttachment.
  • spSkeleton_update() has been removed.
  • spSkeleton->time has been removed.
  • spVertexEffect has been removed.

SFML

• Updated example to use SFML 2.5.1.
• Added dragon example.

C++

• Additions
  • Support for sequences.
  • Support for shortestRotation in animation state. See https://github.com/esotericsoftware/spine-runtimes/issues/2027.
  • Added CMake parameter SPINE_SANITIZE which will enable sanitizers on macOS and Linux.
    • Added SPINE_MAJOR_VERSION, SPINE_MINOR_VERSION, and SPINE_VERSION_STRING. Parsing skeleton .JSON and .skel files will report an error if the skeleton version does not match the runtime version.
  • Added SkeletonBounds::getBoundingBox(), SkeletonBounds::getPolygons(), and SkeletonBounds::getBoundingBoxes().
• Breaking changes
  • RegionAttachment and MeshAttachment no longer implement HasRendererObject.
  • RegionAttachment and MeshAttachment now contain a TextureRegion* instead of encoding region fields directly.
  • AttachmentLoader::newRegionAttachment() and AttachmentLoader::newMeshAttachment() now take an additional Sequence* parameter.
  • MeshAttachment::updateUVs() was renamed to MeshAttachment::updateRegion().
  • RegionAttachment::updateOffset() was renamed to RegionAttachment::updateRegion(), RegionAttachment::setUVs() was merged into updateRegion().
  • Slot::getAttachmentTime() and Slot::setAttachmentTime() have been removed.
  • VertexAttachment::getDeformAttachment() was renamed to VertexAttachment::getTimelineAttachment().
  • Skeleton::update() has been removed.
  • Skeleton::getTime() has been removed.
  • VertexEffect has been removed.

Cocos2d-x

• Renamed SkeletonRenderer to SkeletonRendererCocos2dX to avoid name clash with spine-cpp class.

SFML

• Updated example to use SFML 2.5.1.
• Added dragon example.

UE4

• Updated example project to UE 4.27

C

• Additions

  • Full support for sequences.
  • Support for shortestRotation in animation state. See https://github.com/esotericsoftware/spine-runtimes/issues/2027.
  • RegionAttachment and MeshAttachment now provide a Region property. Use this property instead of the removed RendererObject property (see section Breaking Changes below).

• Breaking changes

  • Removed RendererObject property from RegionAttachment and MeshAttachment. Use attachment.Region property instead. Removed removed IHasRendererObject interface. Use IHasTextureRegion instead.
  • Replaced RegionAttachment.UpdateOffset and MeshAttachment.UpdateUVs with Attachment.UpdateRegion. The caller must ensure that the attachment's region is not null.
  • Removed AttachmentRegionExtensions methods Attachment.SetRegion, MeshAttachment.SetRegion and RegionAttachment.SetRegion(region, update). Use attachment.Region = region; if (update) attachment.UpdateRegion() instead.
  • AttachmentLoader.NewRegionAttachment() and AttachmentLoader.NewMeshAttachment() take an additional Sequence parameter.
  • VertexAttachment.DeformAttachment property has been replaced with VertexAttachment.TimelineAttachment.
  • RegionAttachment.ComputeWorldVertices() takes a Slot instead of a Bone as the first argument.
  • Removed Skeleton.Update(float deltaTime) method.
  • Removed Slot.AttachmentTime property.
  • Removed extension method AtlasRegion.GetSpineAtlasRect() parameter includeRotate (with default value true). Most likely this method was never used with includeRotate=false in user code so no changes are required.
  • AtlasRegion.PackedWidth and AtlasRegion.PackedHeight are swapped compared to 4.0 when packing rotation is equal to 90 degrees. Most likely this property was never accessed in user code so no changes are required.

Unity

• Officially supported Unity versions are 2017.1-2023.1.

• Additions

  • SpineAtlasAsset.CreateRuntimeInstance methods now provide an optional newCustomTextureLoader parameter (defaults to null) which can be set to e.g. (a) => new YourCustomTextureLoader(a) to use your own TextureLoader subclass instead of MaterialsTextureLoader.
  • SkeletonAnimation, SkeletonMecanim and SkeletonGraphic now provide an Inspector parameter Advanced - Animation Update with modes In Update (previous behaviour, the default), In FixedUpdate and Manual Update. This allows to update animation in FixedUpdate when using the SkeletonRootMotion component (which is the recommended combination now, issuing a warning otherwise). The reason is that when root motion leads to a collision with a physics collider, it can introduce jittery excess movement when updating animation in Update due to more Update calls following a single FixedUpdate call.
  • Added SkeletonRootMotion properties PreviousRigidbodyRootMotion and AdditionalRigidbody2DMovement. Setting or querying these movement vectors can be necessary when multiple scripts call Rigidbody2D.MovePosition on the same object where the last call overwrites the effect of preceding ones.
  • BoneFollower and BoneFollowerGraphic now provide an additional Follow Parent World Scale parameter to allow following simple scale of parent bones (rotated/skewed scale can't be supported).
  • Improved Advanced - Fix Prefab Override MeshFilter property for SkeletonRenderer (and subclassesSkeletonAnimation and SkeletonMecanim), now providing an additional option to use a global value which can be set in Edit - Preferences - Spine.
  • Timeline naming improvements: Spine AnimationState Clip Inspector parameter Custom Duration changed and inverted to Default Mix Duration for more clarity. Shortened all Timeline add track menu entries from: Spine.Unity.Playables - <track type> to Spine - <track type>, Spine Animation State Track to SkeletonAnimation Track, Spine AnimationState Graphic Track to SkeletonGraphic Track, and Spine Skeleton Flip Track to Skeleton Flip Track.
  • Timeline track appearance and Inspector: Tracks now show icons and track colors to make them easier to distinguish. When a Track is selected, the Inspector now shows an editable track name which was previously only editable at the Timeline asset.
  • Added example component SkeletonRenderTexture to render a SkeletonRenderer to a RenderTexture, mainly for proper transparency. Added an example scene named RenderTexture FadeOut Transparency that demonstrates usage for a fadeout transparency effect.
  • Added another fadeout example component named SkeletonRenderTextureFadeout which takes over transparency fadeout when enabled. You can use this component as-is, attach it in disabled state and enable it to start a fadeout effect.
  • Timeline clips now offer an additional Alpha parameter for setting a custom constant mix alpha value other than 1.0, just as TrackEntry.Alpha. Defaults to 1.0.
  • GetRemappedClone copying from Sprite now provides additional pmaCloneTextureFormat and pmaCloneMipmaps parameters to explicitly specify the texture format of a newly created PMA texture.
  • Spine property Inspector fields (Animation Name, Bone Name, Slot and similar) now display the name in red when the respective animation/bone/etc no longer exists at the skeleton data. This may be helpful when such items have been renamed or deleted.
  • Added UnscaledTime property at SkeletonAnimation as well, behaving like SkeletonGraphic.UnscaledTime. If enabled, AnimationState uses unscaled game time (Time.unscaledDeltaTime), running animations independent of e.g. game pause (Time.timeScale).
  • SkeletonAnimation, SkeletonMecanim and SkeletonGraphic now provide an additional OnAnimationRebuild callback delegate which is issued after both the skeleton and the animation state have been initialized.
  • Timeline SkeletonAnimation Track and SkeletonGraphic Track now provide an Unscaled Time property. Whenever starting a new animation clip of this track, SkeletonAnimation.UnscaledTime or SkeletonGraphic.UnscaledTime will be set to this value. This allows you to play back Timeline clips either in normal game time or unscaled game time. Note that PlayableDirector.UpdateMethod is ignored and replaced by this property, which allows more fine-granular control per Timeline track.
  • Added SkeletonRootMotion callback delegates ProcessRootMotionOverride and PhysicsUpdateRootMotionOverride to customize how root motion is applied. The new property disableOnOverride determines whether the callback will be issued in addition or instead of normally applying root motion. Added property rootMotionScaleRotation to allow scaling rotational root-motion to match e.g. a 90 degree rotation to a custom target angle.
  • Added outline shader parameter Advanced - Opaque Alpha which can be used to exclude problematic semi-transparent areas, which may receive an undesired large outline color overlay otherwise.
  • Added Spine Preferences setting Prefabs - Optimize Preview Meshes. When enabled, Spine prefab preview meshes will be removed in a pre-build step to reduce build size. This increases build time as all prefabs in the project will be processed. Defaults to false to not slow down builds substantially every time.
  • Added Spine Preferences setting Reload SkeletonData after Play. When enabled, the shared SkeletonData of all skeletons in the active scene is reloaded (from the .json or .skel.bytes file) after exiting play-mode. You can disable this setting to avoid the reloading delay if you can ensure that there are no (accidental) modifications to the shared SkeletonData during play-mode (otherwise it would carry over its effect into subsequent plays). Defaults to true (the safe setting), which maintains existing behaviour.
  • Added SkeletonAnimationMulti sample component methods SetActiveSkeleton(int index) and getter property SkeletonAnimations to more easily apply changes at all SkeletonAnimation instances instead of only the active one.
  • PMA textures now have sRGB (Color Texture) disabled by default, the preset template PMATexturePreset.preset has been adjusted accordingly. As PMA textures are only allowed with Gamma color space, sRGB (Color Texture) shall be disabled to prevent border artifacts when mipmaps are enabled. In Gamma color space having this setting disabled has no drawbacks, only benefits.
  • SkeletonRenderTexture and SkeletonGraphicRenderTexture components now support automatic down-scaling when required size on screen exceeds Max Render Texture Size.
  • Added Spine/SkeletonGraphic Fill shader to provide functionality of Spine/Skeleton Fill shader for SkeletonGraphic.
  • Lit Spine URP shaders (Universal Render Pipeline/Spine/Sprite and Universal Render Pipeline/Spine/Skeleton Lit) now support Forward+ rendering path as introduced by Unity 2022.2 and URP version 14.
  • SkeletonGraphic now supports automatic scaling based on its RectTransform bounds. Automatic scaling can be enabled by setting the added Layout Scale Mode Inspector property to either Width Controls Height, Height Controls Width, FitInParent or EnvelopeParent. It is set to None by default to keep previous behaviour and avoid breaking existing projects. To modify the reference layout bounds, hit the additional Edit Layout Bounds toggle button to switch into edit mode, adjust the bounds or hit Match RectTransform with Mesh, and hit the button again when done adjusting. The skeleton will now be scaled accordingly to fit the reference layout bounds to the object's RectTransform.
  • Added previously missing unlit URP 2D shader variant, available under Universal Render Pipeline/2D/Spine/Skeleton.
  • Added support for light cookies at Universal Render Pipeline/Spine/Sprite shader.
  • Timeline extension package: An additional Spine preferences parameter Timeline - Default Mix Duration has been added, setting newly added SpineAnimationStateClip clips accordingly, defaults to false. This Spine preferences parameter can be enabled to default to the previous behaviour before this update.
  • Tint Black: Added support for Tint Black functionality at all Spine URP shaders (2D and 3D shaders) and at all standard pipeline Spine/Sprite shaders. This feature can be enabled via the Tint Black material parameter in the Inspector. Note: The URP Sprite shaders provided in the Spine URP Shaders extension UPM package require the latest version of the spine-unity runtime (package version 4.1.12, 2023-05-31 or newer) to display the added material parameters in the Inspector GUI.
  • Added SkeletonGraphic.MeshScale property to allow access to calculated mesh scale. MeshScale is based on (1) Canvas pixels per unit, and (2) RectTransform bounds when using Layout Scale Mode other than None at SkeletonGraphic which scales the skeleton mesh to fit the parent RectTransform bounds accordingly.
  • Added updateSeparatorPartScale property to SkeletonGraphic to let render separator parts follow the scale (lossy scale) of the SkeletonGraphic GameObject. Defaults to false to maintain existing behaviour.
  • Added experimental EditorSkeletonPlayer component to allow Editor playback of the initial animation set at SkeletonAnimation or SkeletonGraphic components. Add this component to your skeleton GameObject to enable the in-editor animation preview. Allows configurations for continuous playback when selected, deselected, and alternative single-frame preview by setting Fixed Track Time to any value other than 0. Limitations: At skeletons with variable material count the Inspector preview may be too unresponsive. It is then recommended to disable the EditorSkeletonPlayer component (at the top of the Inspector) to make it responsive again, then you can disable Play When Selected and re-enable the component to preview playback only when deselected.
  • Added example component RenderCombinedMesh to render a combined mesh of multiple meshes or submeshes. This is required by OutlineOnly shaders to render a combined outline when using SkeletonRenderSeparator or multiple atlas pages which would normally lead to outlines around individual parts. To add a combined outline to your SkeletenRenderer:
    1. Add a child GameObject and move it a bit back (e.g. position Z = 0.01).
    2. Add a RenderCombinedMesh component, provided in the Spine Examples/Scripts/Sample Components directory.
    3. Copy the original material, add _Outline to its name and set the shader to your outline-only shader like Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly or Spine/Outline/OutlineOnly-ZWrite.
    4. Assign this _Outline material at the new child GameObject's MeshRenderer component. If you are using SkeletonRenderSeparator and need to enable and disable the SkeletonRenderSeparator component at runtime, you can increase the RenderCombinedMesh Reference Renderers array by one and assign the SkeletonRenderer itself at the last entry after the parts renderers. Disabled MeshRenderer components will be skipped when combining the final mesh, so the combined mesh is automatically filled from the desired active renderers.
  • Timeline extension package: Added static EditorEvent callback to allow editor scripts to react to animation events outside of play-mode. Register to the events via Spine.Unity.Playables.SpineAnimationStateMixerBehaviour.EditorEvent += YourCallback;.
  • URP Shaders: Added Depth Write property to shaders Universal Render Pipeline/Spine/Skeleton and Universal Render Pipeline/Spine/Skeleton Lit. Defaults to false to maintain existing behaviour.
  • Added Animation Update mode (called UpdateTiming in code) In Late Update for SkeletonAnimation, SkeletonMecanim and SkeletonGraphic. This allows you to update the SkeletonMecanim skeleton in the same frame that the Mecanim Animator updated its state, which happens between Update and LateUpdate.
  • URP Shaders: Added URP "Blend Mode" shader variants for both URP 3D and URP 2D renderers. They are listed under shader name "Universal Render Pipeline/Spine/Blend Modes/" and "Universal Render Pipeline/2D/Spine/Blend Modes/" respectively.
  • URP Shaders: Added support for Tint Black functionality at "Blend Modes" Spine URP shaders (2D and 3D shaders).

• Breaking changes

  • Made SkeletonGraphic.unscaledTime parameter protected, use the new property UnscaledTime instead.
  • SkeletonGraphic OnRebuild callback delegate is now issued after the skeleton has been initialized, before the AnimationState component is initialized. This makes behaviour consistent with SkeletonAnimation and SkeletonMecanim component behaviour. Use the new callback OnAnimationRebuild if you want to receive a callback after the SkeletonGraphic AnimationState has been initialized.
  • Changed name of prefab skeleton meshes stored at prefabs from Skeleton Prefab Mesh "name" to Skeleton Prefab Mesh [name] to avoid issues with quotes in mesh asset names (see this issue). Likely this change poses no problems at all, however if you are parsing the prefab's mesh name for whatever reason, be sure to adjust the pattern accordingly.

• Changes of default values

• Deprecated

  • Shader macro RETURN_UNLIT_IF_ADDITIVE_SLOT in spine-unity/Shaders/Sprite/CGIncludes/ShaderShared.cginc has been deprecated and will be removed in spine-unity 4.2. Use RETURN_UNLIT_IF_ADDITIVE_SLOT_TINT instead.

• Restructuring (Non-Breaking)

  • Moved Spine URP Shaders Examples directory from the main package directory to Samples which can be installed via the Unity Package Manager. To import, select the Spine Universal RP Shaders package in the Package Manager window, expand Samples at the bottom and hit Import next to Examples. This follows the standard samples guideline and prevents warning messages about unexpectedly altered immutable assets.

XNA/MonoGame

• Breaking change: Removed spine-xna in favor of spine-monogame. See https://github.com/EsotericSoftware/spine-runtimes/issues/1949
• Added new spine-monogame solution. See spine-monogame/README.md for updated instructions on how to use spine-monogame.

Java

• Additions
  • Support for shortestRotation in animation state. See https://github.com/esotericsoftware/spine-runtimes/issues/2027.
  • Support for sequences.
• Breaking changes
  • AttachmentLoader#newRegionAttachment() and AttachmentLoader#newMeshAttachment() take an additional Sequence parameter.
  • Slot#setAttachmentTime() and Slot#getAttachmentTime() have been removed.
  • VertexAttachment#setDeformAttachment() and VertexAttachment#getDeformAttachment() have been replaced with VertexAttachment#setTimelineAttachment() and VertexAttachment#getTimelineAttachment().
  • RegionAttachment#updateOffset() has been renamed to RegionAttachment#updateRegion(). The caller must ensure that the attachment's region is not null.
  • RegionAttachment#computeWorldVertices() takes a Slot instead of a Bone as the first argument.
  • VertexEffect has been removed.

libGDX

• spine-libgdx, spine-libgdx-tests, and spine-skeletonviewer are now fully Gradle-ified.
• spine-skeletonviewer now supports quickly loading skeletons by dragging and dropping .json or .skel skeleton files onto the window.

Typescript/Javascript

• Additions
  • full support for sequences.
  • Added Promise based AssetManager.loadAll(). Allows synchronous waiting via await assetManager.loadAll(), simplifying loader logic in applications.
  • Support for shortestRotation in animation state. See https://github.com/esotericsoftware/spine-runtimes/issues/2027.
  • Full support for sequences.
• Breaking changes
  • AttachmentLoader#newRegionAttachment() and AttachmentLoader#newMeshAttachment() take an additional Sequence parameter.
  • Slot#attachmentTime and has been removed.
  • VertexAttachment#deformAttachment has been replaced with VertexAttachment#timelineAttachment.
  • RegionAttachment#updateOffset() has been renamed to RegionAttachment#updateRegion(). The caller must ensure that the attachment's region is not null.
  • RegionAttachment#computeWorldVertices() takes a Slot instead of a Bone as the first argument.
  • Removed PlayerEditor.
  • VertexEffect has been removed.
  • Removed RegionAttachment.rendererObject.
  • Renamed TextureRegion.renderObject to TextureRegion.texture.

WebGL backend

• PolygonBatcher can now disable culling automatically if the static variable PolygonBatcher.disableCulling is set to true.
• Added SpineCanvas, a simpler way to render a scene via spine-webgl. See spine-ts/spine-webgl/examples/barebones.html and spine-ts/spine-webgl/examples/mix-and-match.html.
• Added SpineCanavs.dispose() to halt the updating and rendering of the canvas.

Canvas backend

• Improved example.

Three.js backend

• Added orbital controls to THREJS example.
• SkeletonMesh takes an optional SkeletonMeshMaterialCustomizer, allowing modification of materials used by SkeletonMesh.
• Added SkeletonMeshMaterial.alphaTest, when > 0, alpha testing will be performed and fragments will not be written to the depth buffer, if depth writes are enabled.

Player

• Added SpinePlayer.dispose() to explicitely dispose of all resources the player holds on to.

4.0

AS3

NOTE: Spine 4.0 will be the last release supporting spine-as3. Starting from Spine 4.1, spine-as3 will no longer be supported or maintained.

• Switched projects from FDT to Visual Studio Code. See updated README.md files for instructions.
• Expose non-essential colors on bones, bounding box, clipping, and path attachments.
• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see AtlasRegion.names and AtlasRegion.values.
• Added support for reverse animation playback via TrackEntry.reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.

Starling

NOTE: Spine 4.0 will be the last release supporting spine-starling. Starting from Spine 4.1, spine-starling will no longer be supported or maintained.

• Switched projects from FDT to Visual Studio Code. See updated README.md files for instructions.
• Updated to Starling 2.6 and Air SDK 33.

C

• Breaking change: Removed SPINE_SHORT_NAMES define and C++ constructors.
• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added spAnimationState_clearNext() which removes the given spTrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see spAtlasRegion.keyValues.
• Added support for reverse animation playback via spTrackEntry.reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.

Cocos2d-Objc

NOTE: Spine 4.0 will be the last release supporting spine-cocos2d-objc. Starting from Spine 4.1, spine-cocos2d-objc will no longer be supported or maintained.

SFML

• Added ikDemo() in main.cpp. to illustrate how to drive a bone and IK chain through mouse movement.

C++

• Removed dependency on STL throughout the code base, cutting down on the LOC that need parsing by 66%.
• Exposed x and y on SkeletonData through getters and setters.
• Expose non-essential colors on bones, bounding box, clipping, and path attachments.
• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see AtlasRegion.names and AtlasRegion.values.
• Added support for reverse animation playback via TrackEntry.reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.
• spine-cpp now requires C++11.

Cocos2d-x

• Added IKExample scene to illustrate how to drive a bone and IK chain through mouse movement.
• Added SkeletonAnimation::setPreUpdateWorldTransformsListener() and SkeletonAnimation::setPostUpdateWorldTransformsListener(). This allows users to modify bone transforms and other skeleton properties before and after the world transforms of all bones are calculated. See the IKExample for a usage example.

SFML

• Added ikDemo() in main.cpp. to illustrate how to drive a bone and IK chain through mouse movement.

UE4

• SpineWidget now supports the full widget transform, including rendering scale/shear.
• Materials on SkeletonRendererComponent are now blueprint read and writeable. This allows setting dynamic material instances at runtime.
• Added InitialSkin property to USpineWidget. This allows previewing different skins in the UMG Designer. Initial skins can still be overridden via blueprint events such as On Initialized.
• Breaking change: SpineWidget no longer has the Scale property. Instead the size x/y properties can be used.
• Added SetSlotColor on USpineSkeletonComponent to easily set the color of a slot via blueprints.
• Changed mixes set on an SkeletonDataAsset will now be applied to instances of USpineSkeletonComponent.
• Generated normals are now correctly flipped for back faces.
• Modifying parent materials updates material instances accordingly.
• Only .json files that are actually encoding Spine skeletons will be loaded. Other .json files will be left to other importers.
• Updated example project to UE 4.27.

C

• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see AtlasRegion.names and AtlasRegion.values.
• Added support for reverse animation playback via TrackEntry.Reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.
• Breaking change: Removed SkeletonData and Skeleton methods: FindBoneIndex, FindSlotIndex. Bones and slots have an Index field that should be used instead. Be sure to check for e.g. bone == null accordingly before accessing bone.Index.

Unity

• Officially supported Unity versions are 2017.1-2022.1.

• Breaking changes

  • Removed all Spine.Unity.AttachmentTools.SkinUtilities Skin extension methods. These have become obsoleted and error-prone since the introduction of the new Skin API in 3.8. To fix any compile errors, replace any usage of Skin extension methods with their counterparts, e.g. replace occurrances of skin.AddAttachments() with skin.AddSkin(). Please see the example scene Mix and Match Skins on how to use the new Skin API to combine skins, or the updated old example scenes Mix and Match and Mix and Match Equip on how you can update an existing project using the old workflow. If you are using skeletonAnimation.Skeleton.UnshareSkin() in your code, you can replace it with Skin customSkin = new Skin("custom skin"); customSkin.AddSkin(skeletonAnimation.Skeleton.Skin);.
  • Skin.GetAttachments() has been replaced by Skin.Attachments, returning an ICollection<SkinEntry>. This makes access more consistent and intuitive. To fix any compile errors, replace any occurrances of Skin.GetAttachments() by Skin.Attachments.
  • Removed redundant Spine.Unity.AttachmentTools.AttachmentCloneExtensions extension methods Attachment.GetCopy() and Attachment.GetLinkedMesh(). To fix any compile errors, replace any occurrances with Attachment.Copy() and Attachment.NewLinkedMesh().
  • Removed Spine.Unity.AttachmentTools.AttachmentRegionExtensions extension methods Attachment.GetRegion(). Use Attachment.RendererObject as AtlasRegion instead.

  • Removed redundant Spine.SkeletonExtensions extension methods: Replace:

    • Skeleton.SetPropertyToSetupPose()
    • Skeleton.SetDrawOrderToSetupPose()
    • Skeleton.SetSlotAttachmentsToSetupPose()
    • Skeleton.SetSlotAttachmentToSetupPose()

    with Skeleton.SetSlotsToSetupPose(). Replace:

    • Slot.SetColorToSetupPose()
    • Slot.SetAttachmentToSetupPose()

    with Slot.SetToSetupPose().

    Also removed less commonly used extension methods: TrackEntry.AllowImmediateQueue(), Animation.SetKeyedItemsToSetupPose() and Attachment.IsRenderable().

  • SkeletonGraphic now no longer uses a RawImage component at each submesh renderer GameObject when allowMultipleCanvasRenderers is true. Instead, a new custom component SkeletonSubmeshGraphic is used which is more resource friendly. Replacement of these components will be performed automatically through editor scripting, saving scenes or prefabs will persist the upgrade.

  • Linear color space: Previously Slot colors were not displayed the same in Unity as in the Spine Editor. This is now fixed at all shaders, including URP and LWRP shaders. See section Additions below for more details. If you have tweaked Slot colors to look correct in Linear color space in Unity but incorrect in Spine, you might want to adjust the tweaked colors. Slot colors displayed in Unity should now match colors displayed in the Spine Editor when configured to display as Linear color space in the Spine Editor Settings.
  • Additive Slots have always been lit before they were written to the target buffer. Now all lit shaders provide an additional parameter Light Affects Additive which defaults to false, as it is the more intuitive default value. You can enable the old behaviour by setting this parameter to true.
  • Corrected blending behaviour of all Sprite shaders in Premultiply Alpha blend mode (including URP and LWRP packages). Previously vertex color alpha was premultiplied again, even though Premultiply Alpha blend mode assumes PMA texture and PMA vertex color input. Slot-alpha blending will thus be correctly lighter after upgrading to 4.0. If you have compensated this problem by disabling Advanced - PMA Vertex Colors you can now re-enable this parameter, also allowing for rendering Additive slots in a single pass.
  • Corrected all Outline shaders outline thickness when Advanced - Sample 8 Neighbourhood is disabled (thus using 4 Neighbourhood). Previously weighting was incorrectly thick (4x as thick) compared to 8 neighbourhood, now it is more consistent. This might require adjustment of all your outline materials where Sample 8 Neighbourhood is disabled to restore the previous outline thickness, by adjusting the Outline Threshold parameter through adding a /4 to make the threshold 4 times smaller.
  • Reverted changes: BoneFollower property followLocalScale has intermediately been renamed to followScale but was renamed back to followLocalScale. Serialized values (scenes and prefabs) will automatically be upgraded, only code accessing followScale needs to be adapted.
  • Fixed Timeline not pausing (and resuming) clip playback on Director pause, this is now the default behaviour. If you require the old behaviour (e.g. to continue playing an idle animation during Director pause), there is now an additional parameter Don't Pause with Director provided that can be enabled for each Timeline clip.
  • Fixed Timeline Spine AnimationState Clips ignoring empty space on the Timeline after a clip's end. Timeline clips now also offer Don't End with Clip and Clip End Mix Out Duration parameters if you prefer the old behaviour of previous versions. By default when empty space follows the clip on the timeline, the empty animation is set on the track with a MixDuration of Clip End Mix Out Duration. Set Don't End with Clip to true to continue playing the clip's animation instead and mimic the old 3.8 behaviour. If you prefer pausing the animation instead of mixing out to the empty animation, set Clip End Mix Out Duration to a value less than 0, then the animation is paused instead.

• Additions and Improvements

  • Additional Fix Draw Order parameter at SkeletonRenderer, defaults to disabled (previous behaviour). Applies only when 3+ submeshes are used (2+ materials with alternating order, e.g. "A B A"). If true, MaterialPropertyBlocks are assigned at each material to prevent aggressive batching of submeshes by e.g. the LWRP renderer, leading to incorrect draw order (e.g. "A1 B A2" changed to "A1A2 B"). You can leave this parameter disabled when everything is drawn correctly to save the additional performance cost.
  • Additional Timeline features. SpineAnimationStateClip now provides a Speed Multiplier, a start time offset parameter Clip In, support for blending successive animations by overlapping tracks. An additional Use Blend Duration parameter (defaults to true) allows for automatic synchronisation of MixDuration with the current overlap blend duration. An additional Spine preferences parameter Use Blend Duration has been added which can be disabled to default to the previous behaviour before this update.
  • Additional SpriteMask and RectMask2D example scene added for demonstration of mask setup and interaction.
  • Real physics hinge chains for both 2D and 3D physics. The SkeletonUtilityBone Inspector provides an interface to create 2D and 3D hinge chains. Previously created chains have only been respecting gravity, but not momentum of the skeleton or parent bones. The new physics rig created when pressing Create 3D Hinge Chain and Create 2D Hinge Chain creates a more complex setup that also works when flipping the skeleton. Note that the chain root node is no longer parented to bones of the skeleton. This is a requirement in Unity to have momentum applied properly - do not reparent the chain root to bones of your skeleton, or you will loose any momentum applied by the skeleton's movement.
  • Outline rendering functionality for all shaders. Every shader now provides an additional set of Outline parameters to enable custom outline rendering. When outline rendering is enabled via the Material inspector, it automatically switches the shader to the respective Spine/Outline shader variant. Outlines are generated by sampling neighbour pixels, so be sure to add enough transparent padding when exporting your atlas textures to fit the desired outline width. In order to enable outline rendering at a skeleton, it is recommended to first prepare an additional outline material copy and then switch the material of the target skeleton to this material. This prevents unnecessary additional runtime material copies and drawcalls. Material switching can be prepared via a SkeletonRendererCustomMaterials component and then enabled or disabled at runtime. Alternatively, you can also directly modify the SkeletonRenderer.CustomMaterialOverride property. Outline rendering is fully supported on SkeletonGraphic shaders as well.
  • Added SkeletonRenderer.EditorSkipSkinSync scripting API property to be able to set custom skins in editor scripts. Enable this property when overwriting the Skeleton's skin from an editor script. Without setting this parameter, changes will be overwritten by the next inspector update. Only affects Inspector synchronisation of skin with initialSkinName, not startup initialization.
  • AtlasUtilities.GetRepackedAttachments() and AtlasUtilities.GetRepackedSkin() provide support for additional texture channels such as normal maps via the optional parameter additionalTexturePropertyIDsToCopy. See the spine-unity runtime documentation, section Combining Skins - Advanced - Runtime Repacking with Normalmaps for further info and example usage code.
  • BoneFollower can now optionally follow (uniform) world scale of the reference bone. There is now a Mode dropdown selector in the Inspector which can be set to either Local or World Uniform.
  • All Spine/SkeletonGraphic shaders now provide a parameter CanvasGroup Compatible which can be enabled to support CanvasGroup alpha blending. For correct results, you should then disable Pma Vertex Colors in the SkeletonGraphic Inspector, in section Advanced (otherwise Slot alpha will be applied twice).

  • Now supporting Universal Render Pipeline (URP), including the 2D Renderer pipeline, through an additional UPM package.

    • Installation: You can download the Unity Package Manager (UPM) package via the download page or find it in the spine-runtimes/spine-unity/Modules subdirectory on the git repository. You can then either unzip (copy if using git) the package to

      • a) the Packages directory in your project where it will automatically be loaded, or
      • b) to an arbitrary directory outside the Assets directory and then open Package Manager in Unity, select the + icon, choose Add package from disk.. and point it to the package.json file.

      The Project panel should now show an entry Spine Universal RP Shaders under Packages. If the directory is not yet listed, you will need to close and re-open Unity to have it display the directory and its contents.

    • Usage: The package provides two shaders specifically built for the universal render pipeline:

      • Universal Render Pipeline/Spine/Skeleton, as a universal variant of the Spine/Skeleton shader,
      • Universal Render Pipeline/Spine/Skeleton Lit, as a universal variant of the Spine/Skeleton Lit shader,
      • Universal Render Pipeline/Spine/Sprite, as a universal variant of the Spine/Sprite/Vertex Lit and Pixel Lit shaders, which were not functioning in the universal render pipeline,
    • Universal Render Pipeline/2D/Spine/Skeleton Lit, as a universal 2D Renderer variant of the Spine/Skeleton Lit shader, and
      • Universal Render Pipeline/2D/Spine/Sprite, as a universal 2D Renderer variant of the Spine/Sprite/Vertex Lit and Pixel Lit shaders. The shaders can be assigned to materials as usual and will respect your settings of the assigned UniversalRenderPipelineAsset under Project Settings - Graphics.
    • Restrictions As all Spine shaders, the URP shaders do not support Premultiply alpha (PMA) atlas textures in Linear color space. Please export your atlas textures as straight alpha textures with disabled Premultiply alpha setting when using Linear color space. You can check the current color space via Project Settings - Player - Other Settings - Color Space..
    • Example: You can find an example scene in the package under com.esotericsoftware.spine.urp-shaders-3.8/Examples/URP Shaders.unity that demonstrates usage of the URP shaders.

  • Spine Preferences now provide an Atlas Texture Settings parameter for applying customizable texture import settings at all newly imported Spine atlas textures. When exporting atlas textures from Spine with Premultiply alpha enabled (the default), you can leave it at PMATexturePreset. If you have disabled Premultiply alpha, set it to the included StraightAlphaTexturePreset asset. You can also create your own TextureImporter Preset asset and assign it here (include PMA or Straight in the name). In Unity versions before 2018.3 you can use Texture2D template assets instead of the newer Preset assets. Materials created for imported textures will also have the Straight Alpha Texture parameter configured accordingly.

  • All Sprite shaders (including URP and LWRP extension packages) now provide an additional Fixed Normal Space option World-Space. PReviously options were limited to View-Space and Model-Space.
  • SkeletonGraphic now fully supports SkeletonUtility for generating a hierarchy of SkeletonUtilityBones in both modes Follow and Override. This also enables creating hinge chain physics rigs and using SkeletonUtilityConstraints such as SkeletonUtilityGroundConstraint and SkeletonUtilityEyeConstraint on SkeletonGraphic.
  • Added native support for slot blend modes Additive, Multiply and Screen with automatic assignment at newly imported skeleton assets. BlendModeMaterialAssets are now obsolete and replaced by the native properties at SkeletonDataAsset. The SkeletonDataAsset Inspector provides a new Blend Modes - Upgrade button to upgrade an obsolete BlendModeMaterialAsset to the native blend modes properties. This upgrade will be performed automatically on imported and re-imported assets.
  • BoneFollower and BoneFollowerGraphic components now provide better support for following bones when the skeleton's Transform is not the parent of the follower's Transform. Previously e.g. rotating a common parent Transform did not lead to the desired result, as well as negatively scaling a skeleton's Transform when it is not a parent of the follower's Transform.
  • Linear color space: Previously Slot colors were not displayed the same in Unity as in the Spine Editor (when configured to display as Linear color space in Spine Editor Settings). This is now fixed at all shaders, including URP and LWRP shaders.
  • All Spine shaders (also including URP and LWRP shaders) now support PMA Vertex Colors in combination with Linear color space. Thus when using Spine shaders, you should always enable PMA Vertex Colors at the SkeletonRenderer component. This allows using single pass Additive Slots rendering. Note that textures shall still be exported as Straight alpha when using Linear color space, so combine PMA Vertex Colors with Straight Texture. All Sprite shaders now provide an additional blend mode for this, named PMA Vertex, Straight Texture which shall be the preferred Sprite shader blend mode in Linear color space.
  • Additive Slots have always been lit before they were written to the target buffer. Now all lit shaders provide an additional parameter Light Affects Additive which defaults to false, as it is the more intuitive default value. You can enable the old behaviour by setting this parameter to true.
  • SkeletonRootMotion and SkeletonMecanimRootMotion components now support arbitrary bones in the hierarchy as Root Motion Bone. Previously there were problems when selecting a non-root bone as Root Motion Bone. Skeleton.ScaleX and .ScaleY and parent bone scale is now respected as well.
  • URP and LWRP Sprite and SkeletonLit shaders no longer require Advanced - Add Normals enabled to properly cast and receive shadows. It is recommended to disable Add Normals if normals are otherwise not needed.
  • Added an example component RootMotionDeltaCompensation located in Spine Examples/Scripts/Sample Components which can be used for applying simple delta compensation. You can enable and disable the component to toggle delta compensation of the currently playing animation on and off.
  • SkeletonRagdoll and SkeletonRagdoll2D now support bone scale at any bone in the skeleton hierarchy. This includes negative scale and root bone scale.
  • Attachment.GetRemappedClone(Sprite) method now provides an additional optional parameter useOriginalRegionScale. When set to true, the replaced attachment's scale is used instead of the Sprite's Pixel per Unity setting, allowing for more consistent scaling. Note: When remapping Sprites, be sure to set the Sprite's Mesh Type to Full Rect and not Tight, otherwise the scale will be wrong.
  • SkeletonGraphic now supports all Slot blend modes when Advanced - Multiple Canvas Renderers is enabled in the Inspector. The SkeletonGraphic Inspector now provides a Blend Mode Materials section where you can assign SkeletonGraphic materials for each blend mode, or use the new default materials. New SkeletonGraphic shaders and materials have been added for each blend mode. The BlendModes.unity example scene has been extended to demonstrate this new feature. For detailed information see the SkeletonGraphic documentation page.
  • Timeline clips now also offer Don't End with Clip and Clip End Mix Out Duration parameters. By default when empty space follows the clip on the timeline, the empty animation is set on the track with a MixDuration of Clip End Mix Out Duration. Set Don't End with Clip to true to continue playing the clip's animation instead and mimic the old 3.8 behaviour. If you prefer pausing the animation instead of mixing out to the empty animation, set Clip End Mix Out Duration to a value less than 0, then the animation is paused instead.
  • Prefabs containing SkeletonRenderer, SkeletonAnimation and SkeletonMecanim now provide a proper Editor preview, including the preview thumbnail.
  • SkeletonRenderer (and subclassesSkeletonAnimation and SkeletonMecanim) now provide a property Advanced - Fix Prefab Override MeshFilter, which when enabled fixes the prefab always being marked as changed. It sets the MeshFilter's hide flags to DontSaveInEditor. Unfortunately this comes at the cost of references to the MeshFilter by other components being lost, therefore this parameter defaults to false to keep the safe existing behaviour.
  • BoundingBoxFollower and BoundingBoxFollowerGraphic now provide previously missing usedByEffector and usedByComposite parameters to be set at all generated colliders.
  • BoneFollower and BoneFollowerGraphic now provide an additional Follow Parent World Scale parameter to allow following simple scale of parent bones (rotated/skewed scale can't be supported).
  • Improved Advanced - Fix Prefab Override MeshFilter property for SkeletonRenderer (and subclassesSkeletonAnimation and SkeletonMecanim), now providing an additional option to use a global value which can be set in Edit - Preferences - Spine.
  • Timeline naming improvements: Spine AnimationState Clip Inspector parameter Custom Duration changed and inverted to Default Mix Duration for more clarity. Shortened all Timeline add track menu entries from: Spine.Unity.Playables - <track type> to Spine - <track type>, Spine Animation State Track to SkeletonAnimation Track, Spine AnimationState Graphic Track to SkeletonGraphic Track, and Spine Skeleton Flip Track to Skeleton Flip Track.
  • Timeline track appearance and Inspector: Tracks now show icons and track colors to make them easier to distinguish. When a Track is selected, the Inspector now shows an editable track name which was previously only editable at the Timeline asset.
  • Added example component SkeletonRenderTexture to render a SkeletonRenderer to a RenderTexture, mainly for proper transparency. Added an example scene named RenderTexture FadeOut Transparency that demonstrates usage for a fadeout transparency effect.
  • Added another fadeout example component named SkeletonRenderTextureFadeout which takes over transparency fadeout when enabled. You can use this component as-is, attach it in disabled state and enable it to start a fadeout effect.
  • Timeline clips now offer an additional Alpha parameter for setting a custom constant mix alpha value other than 1.0, just as TrackEntry.Alpha. Defaults to 1.0.
  • SkeletonGraphic now provides additional render callback delegates OnInstructionsPrepared, AssignMeshOverrideSingleRenderer and AssignMeshOverrideMultipleRenderers. OnInstructionsPrepared is raised at the end of LateUpdate after render instructions are done, target renderers are prepared, and the mesh is ready to be generated. The two AssignMeshOverride delegates allow separate code to take over mesh and material assignment of a SkeletonGraphic component.
  • Added example component SkeletonGraphicRenderTexture to render a SkeletonGraphic to a RenderTexture (similar as SkeletonRenderTexture), mainly for proper transparency. Extended example scene RenderTexture FadeOut Transparency accordingly.

• Changes of default values

• Deprecated

• Restructuring (Non-Breaking)

XNA/MonoGame

• Added normalmap support via SpineEffectNormalmap and support for loading multiple texture layers following a suffix-pattern. Please see the example code on how to use them.
• Added Z property to SkeletonRenderer to provide a constant Z offset that's added to all vertices.
• Added ZSpacing property to SkeletonRenderer to allow specifying the distance on the z-axis between attachments.
• SkeletonDebugRenderer bone color attributes are now public and modifiable by user.

Java

• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see Region.names and Region.values.
• Added support for reverse animation playback via TrackEntry.getReverse() and TrackEntry.setReverse().
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.
• Breaking change: Removed SkeletonData and Skeleton methods: findBoneIndex, findSlotIndex. Bones and slots have an index field that should be used instead.

libGDX

• Exposed colors in SkeletonRendererDebug.
• Updated to libGDX 1.10.0.

Lua

• Expose non-essential colors on bones, bounding box, clipping, and path attachments.
• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see AtlasRegion.names and AtlasRegion.values.
• Added support for reverse animation playback via TrackEntry.reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.

Love2D

Corona

• Breaking change: spine-corona has been renamed to spine-solar2d. Change your require "spine-corona.spine" statements to require "spine-solar2d.spine"

Typescript/Javascript

• Breaking change: refactored to ECMAScript modules. See this blog post as well as the updated README.md.
• Breaking change: the build/ folder and compiled artifacts are no longer part of the repository. Instead, npm run build in spine-ts/ to generate ECMAScript modules and IIFE modules in spine-<module-name>/dist.
• Breaking change: the .npmignore and package.json files in the root directory have been deleted. Use the corresponding files in spine-ts/ instead, or better, depend on the packages from the NPM registry.
• Updated runtime to be compatible with TypeScript 3.6.3.
• Added AssetManager#setRawDataURI(path, data). Allows to set raw data URIs for a specific path, which in turn enables embedding assets into JavaScript/HTML.
• Expose non-essential colors on bones, bounding box, clipping, and path attachments.
• Timeline API has been extended to support component-wise timelines exported by Spine 4.0.
• Added AnimationState.clearNext() which removes the given TrackEntry and all entries after it.
• Added support for texture atlas key value pairs, see AtlasRegion.names and AtlasRegion.values.
• Added support for reverse animation playback via TrackEntry.reverse.
• Added proportional spacing mode support for path constraints.
• Added support for uniform scaling for two bone IK.
• Fixed applying a constraint reverting changes from other constraints.
• AssetManager constructor now takes an option Downloader instance. Used to download assets only once and share them between AssetManager instances.
• Added web worker support to AssetManager.
• Added various default parameters to AnimationState methods for ease of use.
• Added SpineCanvas, a simpler way to render a scene via spine-webgl. See spine-ts/spine-webgl/examples/barebones.html and spine-ts/spine-webgl/examples/mix-and-match.html.

WebGL backend

• Breaking change: removed SharedAssetManager. Use AssetManager with a shared Downloader instance instead.
• Breaking change: the global object spine.webgl no longer exists. All classes and functions are now exposed on the global spine object directly. Simply replace any reference to spine.webgl. in your source code with spine..

Canvas backend

• Renderer now accounts for whitespace stripping.
• Breaking change: the global object spine.canvas no longer exists. All classes and functions are now exposed on the global spine object directly. Simply replace any reference to spine.canvas. in your source code with spine..

Three.js backend

• SkeletonMesh now takes an optional SkeletonMeshMaterialParametersCustomizer function that allows you to modify the ShaderMaterialParameters before the material is finalized. Use it to modify things like THREEJS' Material.depthTest etc. See #1590.
• Breaking change: the global object spine.canvas no longer exists. All classes and functions are now exposed on the global spine object directly. Simply replace any reference to spine.threejs. in your source code with spine..
• Breaking change: the default fragment shader of SkeletonMeshMaterial now explicitely discards fragments with alpha < 0.5. See https://github.com/EsotericSoftware/spine-runtimes/issues/1985
• Breaking change: reversal of the previous breaking change: the default fragment shader of SkeletonMeshMaterial does no longer discard fragments with alpha < 0.5. Pass a SkeletonMeshMaterialParametersCustomizer to the SkeletonMesh constructor, and modify parameters.alphaTest to be > 0.

Player

• Added SpinePlayerConfig.rawDataURIs. Allows to embed data URIs for skeletons, atlases and atlas page images directly in the HTML/JS without needing to load it from a separate file. See the example for a demonstration.
• Added SpinePlayerConfig.frame. If set, the callback is called each frame, before the skeleton is posed or drawn.
• Added SpinePlayerConfig.update. If set, the callback is called each frame, just after the skeleton is posed.
• Added SpinePlayerConfig.draw. If set, the callback is called each frame, just after the skeleton is drawn.
• Added SpinePlayerConfig.downloader. The spine.Downloader instance can be shared between players so assets are only downloaded once.
• If SpinePlayerConfig.jsonURL ends with an anchor, the anchor text is used to find the skeleton in the specified JSON file.
• Added SpinePlayer.dispose(), disposes all CPU and GPU side resources, removes all listeners, and removes the player DOM from the parent.

3.8

AS3

• Breaking changes

  • Renamed Slot#getAttachmentVertices() to Slot#getDeform().
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin#addAttachment() to Skin#setAttachment().
  • Removed VertexAttachment#applyDeform() and replaced it with VertexAttachment#deformAttachment. The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from MeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.
  • Switched projects from FDT to Visual Studio Code. See updated README.md files for instructions.

• Additions

  • Added SkeletonBinary to load binary .skel files. See MixAndMatchExample.as in spine-startling-example.
  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin#getAttachments(). Returns all attachments in the skin.
    • Added Skin#getAttachments(int slotIndex). Returns all attachements in the skin for the given slot index.
    • Added Skin#addSkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin#copySkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
  • Added Attachment#copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment#newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.

Starling

• Added MixAndMatchExample.as to demonstrate the new Skin API additions and how to load binary .skel files.
• Switched projects from FDT to Visual Studio Code. See updated README.md files for instructions.

C

• Breaking changes

  • Renamed spSlot#attachmentVertices to spSlot#deform.
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed spSkin_addAttachment() to Skin#spSkin_addAttachment().
  • Removed spVertexAttachment_applyDeform() and replaced it with VertexAttachment#deformAttachment. The attachment set on this field is used to decide if a spDeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from spMeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.

• Additions

  • Added x and y coordinates for setup pose AABB in spSkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added spSkin_getAttachments(). Returns all attachments in the skin.
    • Added spSkin_getAttachments(int slotIndex). Returns all attachements in the skin for the given slot index.
    • Added spSkin_addSkin(spSkin* skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added spSkin_copySkin(spSkin* skin). Adds all attachments, bones, and skins from the specified skin to this skin. spVertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
    • All attachments inserted into skins are reference counted. When the last skin referencing an attachment is disposed, the attachment will also be disposed.
  • Added spAttachment_copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added spMeshAttachment_newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.

Cocos2d-Objc

• Added mix-and-match example to demonstrate the new Skin API.
• Added IKExample.
• Added SkeletonAnimation preUpdateWorldTransformsListener and SkeletonAnimation postUpdateWorldTransformsListener. When set, these callbacks will be invokved before and after the skeleton's updateWorldTransforms() method is called. See the IKExample how it can be used.

SFML

• Added mix-and-match example to demonstrate the new Skin API.
• Added IKExample.

C++

• Breaking Changes

  • Renamed Slot::getAttachmentVertices() to Slot::getDeform().
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin::addAttachment() to Skin::setAttachment().
  • Removed VertexAttachment::applyDeform() and replaced it with VertexAttachment::getDeformAttachment(). The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed _inheritDeform field, getter, and setter from MeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.

• Additions

  • AnimationState and TrackEntry now also accept a subclass of AnimationStateListenerObject as a listener for animation events in the overloaded setListener() method.
  • SkeletonBinary and SkeletonJson now parse and set all non-essential data like audio path.
  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin#getAttachments(). Returns all attachments in the skin.
    • Added Skin#getAttachments(int slotIndex). Returns all attachements in the skin for the given slot index.
    • Added Skin#addSkin(Skin &skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin#copySkin(Skin &skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
    • All attachments inserted into skins are reference counted. When the last skin referencing an attachment is disposed, the attachment will also be disposed.
  • Added Attachment#copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment#newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.
  • Exposed x and y on SkeletonData through getters and setters.

Cocos2d-x

• Updated to cocos2d-x 3.17.1
• Added mix-and-match example to demonstrate the new Skin API.
• Exmaple project requires Visual Studio 2019 on Windows
• Added IKExample.
• Added SkeletonAnimation::setPreUpdateWorldTransformsListener() and SkeletonAnimation::setPreUpdateWorldTransformsListener(). When set, these callbacks will be invokved before and after the skeleton's updateWorldTransforms() method is called. See the IKExample how it can be used.

SFML

• Added mix-and-match example to demonstrate the new Skin API.

UE4

• Added bAutoPlaying flag to USpineSkeletonAnimationComponent. When false, the component will not update the internal animation state and skeleton.
• Updated example project to UE 4.22.
• (Re-)Importing Spine assets will perform a version compatibility check and alert users about mismatches in editor mode.
• USpineSkeletonRendererComponent allows passing a USpineSkeletonComponent to update it. This way, the renderer component can be used without a skeleton component on the same actor.
• Added blueprint-callable methods to SpineSkeletonComponent and SpineSkeletonAnimationComponent to query and set skins, and enumerate bones, slots, and animations.
• Extended skeleton data editor preview. The preview now shows bones, slots, animations, and skins found in the skeleton data. See this blog post.
• Added preview animation and skin fields, allowing you to preview animations and skins right in the editor. See this blog post.
• Removed dependency on RHI, RenderCore, and ShaderCore.
• Re-importing atlases and their textures now works consistently in all situations.
• Added mix-and-match example to demonstrate the new Skin API.
• Materials on SkeletonRendererComponent are now blueprint read and writeable. This allows setting dynamic material instances at runtime.
• Added InitialSkin property to USpineWidget. This allows previewing different skins in the UMG Designer. Initial skins can still be overridden via blueprint events such as On Initialized.
• USpineWidget will now report its own desired size based on the setup pose dimensions of the skeleton. This is used when selecting Size to content on a USpineWidget in the designer.
• Updated example project to UE 5.2.

C

• Breaking changes

  • Changed IkConstraintData.Bones type from List<BoneData> to ExposedList<BoneData> for unification reasons. Note: this modification will most likely not affect user code.
  • Renamed Slot.AttachmentVertices to Slot.Deform.
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin.AddAttachment() to Skin.SetAttachment().
  • Removed FindAttachmentsForSlot(int slotIndex, List<Attachment> attachments) and FindNamesForSlot (int slotIndex, List<string> names) and replaced it with Skin.GetAttachments(int slotIndex, List<SkinEntry> attachments) which returns the combined SkinEntry object holding both name and attachment.
  • Removed VertexAttachment.ApplyDeform() and replaced it with VertexAttachment.DeformAttachment. The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from MeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.

• Additions

  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin.GetAttachments(). Returns all attachments in the skin.
    • Added Skin.GetAttachments(int slotIndex, List<SkinEntry> attachments). Returns all attachements in the skin for the given slot index. This method replaces FindAttachmentsForSlot and FindNamesForSlot.
    • Added Skin.AddSkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin.CopySkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
  • Added Attachment.Copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment.NewLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.

Unity

• Breaking changes

  • Officially supported Unity versions are 2017.1-2020.2.
  • Spine .asmdef files are again active by default. They have previously been deactivated to .txt extension which is now no longer necessary.
  • Removed PoseSkeleton() and PoseWithAnimation() extension methods to prevent issues where animations are not mixed out. Problem was that these methods did not set AnimationState, leaving incorrect state at e.g. attachments enabled at slots when starting subsequent animations. As a replacement you can use AnimationState.ClearTrack(0); followed by var entry = AnimationState.SetAnimation(0, animation, loop); entry.TrackTime = time to achieve similar behaviour.
  • The Shadow alpha cutoff shader parameter is now respecting slot-color alpha values at all Spine shaders. A fragment's texture color alpha is multiplied with slot-color alpha before the result is tested against the Shadow alpha cutoff threshold.
  • Removed redundant Attachment.GetClone() and MeshAttachment.GetLinkedClone() extension methods. Use methods Attachment.Copy and MeshAttachment.NewLinkedMesh() instead.
  • Renamed extension method Attachment.GetClone(bool cloneMeshesAsLinked) to Attachment.GetCopy(bool cloneMeshesAsLinked) to follow the naming scheme of the Spine API.
  • SkeletonDataAsset.atlasAssets is now an array of the base class AtlasAssetBase instead of SpineAtlasAsset, which provides IEnumerable<> Materials instead of List<> materials. Replace any access via atlasAsset.materials[0] with atlasAsset.Materials.First() and add a using System.Linq; statement.
  • Changed MeshAttachment.GetLinkedMesh() method signatures: removed optional parameters bool inheritDeform = true, bool copyOriginalProperties = false.
  • Changed namespace Spine.Unity.Modules to Spine.Unity and Spine.Unity.Examples after restructuring (see section below) in respective classes:
    • When receiving namespace related errors, replace using statements of using Spine.Unity.Modules.AttachmentTools; with using Spine.Unity.AttachmentTools;. You can remove using Spine.Unity.Modules; statements when a using Spine.Unity statement is already present in the file.
    • AttachmentTools, SkeletonPartsRenderer, SkeletonRenderSeparator, SkeletonRendererCustomMaterials changed to namespace Spine.Unity.
    • SkeletonGhost, SkeletonGhostRenderer, AtlasRegionAttacher, SkeletonGraphicMirror, SkeletonRagdoll, SkeletonRagdoll2D, SkeletonUtilityEyeConstraint, SkeletonUtilityGroundConstraint, SkeletonUtilityKinematicShadow changed to namespace Spine.Unity.Examples.
  • Split Editor/Utility/SpineEditorUtilities class into multiple files with partial class qualifier.
    • Nested classes SpineEditorUtilities.AssetUtility and SpineEditorUtilities.EditorInstantiation are now no longer nested. If you receive namespace related errors, replace any occurrance of
      • SpineEditorUtilities.AssetUtility with AssetUtility and
      • SpineEditorUtilities.EditorInstantiation with EditorInstantiation.
  • Timeline Support has been moved to a separate UPM Package Previously the Spine Timeline integration was located in the Modules/Timeline directory and was deactivated by default, making it necessary to activate it via the Spine Preferences. Now the Timeline integration has been moved to an additional UPM package which can be found under Modules/com.esotericsoftware.spine.timeline.
  • Installation: You can download the Unity Package Manager (UPM) package via the download page or find it in the spine-runtimes/spine-unity/Modules subdirectory on the git repository. You can then either unzip (copy if using git) the package to a) the Packages directory in your project where it will automatically be loaded, or b) to an arbitrary directory outside the Assets directory and then open Package Manager in Unity, select the + icon, choose Add package from disk.. and point it to the package.json file. The Project panel should now show an entry Spine Timeline Extensions under Packages. If the directory is not yet listed, you will need to close and re-open Unity to have it display the directory and its contents.
  • SkeletonMecanim's Layer Mix Mode enum name MixMode.SpineStyle has been renamed to MixMode.Hard. This is most likely not set via code and thus unlikely to be a problem. Serialized scenes and prefabs are unaffected.
  • SkeletonRootMotion and SkeletonMecanimRootMotion components now support arbitrary bones in the hierarchy as Root Motion Bone. Previously there were problems when selecting a non-root bone as Root Motion Bone. Skeleton.ScaleX and .ScaleY and parent bone scale is now respected as well.

• Additions

  • Spine Preferences stored in Assets/Editor/SpineSettings.asset Now Spine uses the new SettingsProvider API, storing settings in a SpineSettings.asset file which can be shared with team members. Your old preferences are automatically migrated to the new system.
  • Added support for Unity's SpriteMask to SkeletonAnimation and SkeletonMecanim. All mask interaction modes are supported. See this blog post.
  • Added support for Unity's RectMask2D to SkeletonGraphics. See this blog post.
  • Added Create 2D Hinge Chain button at SkeletonUtilityBone inspector, previously only Create 3D Hinge Chain was available.

  • Now supporting Lightweight Render Pipeline (LWRP) through an additional UPM package.

    • Installation: You can download the Unity Package Manager (UPM) package via the download page or find it in the spine-runtimes/spine-unity/Modules subdirectory on the git repository. You can then either unzip (copy if using git) the package to

      • a) the Packages directory in your project where it will automatically be loaded, or
      • b) to an arbitrary directory outside the Assets directory and then open Package Manager in Unity, select the + icon, choose Add package from disk.. and point it to the package.json file.

      If you are using git and Unity 2019.2 or newer versions and receive an error that dependencies could not be resolved by the package manager (only higher versions of Unity's Lightweight RP package are available, e.g. 6.9.0 and up), please copy the prepared package-UNITYVERSION.json file for your Unity version (e.g. package-2019.2.json) over the existing package.json file to change the dependency accordingly. Unfortunately Unity's Package Manager does not provide a way to specify a version range for a dependency like "5.7.2 - 6.9.0" yet, so this manual step is necessary for git users.

      The Project panel should now show an entry Spine Lightweight RP Shaders under Packages. If the directory is not yet listed, you will need to close and re-open Unity to have it display the directory and its contents.

    • Usage: The package provides two shaders specifically built for the lightweight render pipeline:

      • Lightweight Render Pipeline/Spine/Skeleton, as a lightweight variant of the Spine/Skeleton shader,
      • Lightweight Render Pipeline/Spine/Skeleton Lit, as a lightweight variant of the Spine/Skeleton Lit shader and
      • Lightweight Render Pipeline/Spine/Sprite, as a lightweight variant of the Spine/Sprite/Vertex Lit and Pixel Lit shaders, which were not functioning in the lightweight render pipeline. The shaders can be assigned to materials as usual and will respect your settings of the assigned LightweightRenderPipelineAsset under Project Settings - Graphics.
    • Restrictions As all Spine shaders, the LWRP shaders do not support Premultiply alpha (PMA) atlas textures in Linear color space. Please export your atlas textures as straight alpha textures with disabled Premultiply alpha setting when using Linear color space. You can check the current color space via Project Settings - Player - Other Settings - Color Space..
    • Example: You can find an example scene in the package under com.esotericsoftware.spine.lwrp-shaders-3.8/Examples/LWRP Shaders.unity that demonstrates usage of the LWRP shaders.

  • Added Spine/Skeleton Lit ZWrite shader. This variant of the Spine/Skeleton Lit shader writes to the depth buffer with configurable depth alpha threshold. Apart from that it is identical to Spine/Skeleton Lit.

  • Additional yield instructions to wait for animation track events End, Complete and Interrupt.
    • WaitForSpineAnimationComplete now proves an additional bool includeEndEvent parameter, defaults to false (previous behaviour).
    • Added a new WaitForSpineAnimationEnd yield instruction.
    • Added a new generic WaitForSpineAnimation yield instruction which can be configured to wait for any combination of animation track events. It is now used as base class for WaitForSpineAnimationComplete and WaitForSpineAnimationEnd.
  • Additional Fix Draw Order parameter at SkeletonRenderer, defaults to disabled (previous behaviour). Applies only when 3+ submeshes are used (2+ materials with alternating order, e.g. "A B A"). If true, MaterialPropertyBlocks are assigned at each material to prevent aggressive batching of submeshes by e.g. the LWRP renderer, leading to incorrect draw order (e.g. "A1 B A2" changed to "A1A2 B"). You can leave this parameter disabled when everything is drawn correctly to save the additional performance cost.
  • Additional Timeline features. SpineAnimationStateClip now provides a Speed Multiplier, a start time offset parameter Clip In, support for blending successive animations by overlapping tracks. An additional Use Blend Duration parameter (defaults to true) allows for automatic synchronisation of MixDuration with the current overlap blend duration. An additional Spine preferences parameter Use Blend Duration has been added which can be disabled to default to the previous behaviour before this update.
  • Additional SpriteMask and RectMask2D example scene added for demonstration of mask setup and interaction.
  • Real physics hinge chains for both 2D and 3D physics. The SkeletonUtilityBone Inspector provides an interface to create 2D and 3D hinge chains. Previously created chains have only been respecting gravity, but not momentum of the skeleton or parent bones. The new physics rig created when pressing Create 3D Hinge Chain and Create 2D Hinge Chain creates a more complex setup that also works when flipping the skeleton. Note that the chain root node is no longer parented to bones of the skeleton. This is a requirement in Unity to have momentum applied properly - do not reparent the chain root to bones of your skeleton, or you will loose any momentum applied by the skeleton's movement.
  • Outline rendering functionality for all shaders. Every shader now provides an additional set of Outline parameters to enable custom outline rendering. When outline rendering is enabled via the Material inspector, it automatically switches the shader to the respective Spine/Outline shader variant. Outlines are generated by sampling neighbour pixels, so be sure to add enough transparent padding when exporting your atlas textures to fit the desired outline width. In order to enable outline rendering at a skeleton, it is recommended to first prepare an additional outline material copy and then switch the material of the target skeleton to this material. This prevents unnecessary additional runtime material copies and drawcalls. Material switching can be prepared via a SkeletonRendererCustomMaterials component and then enabled or disabled at runtime. Alternatively, you can also directly modify the SkeletonRenderer.CustomMaterialOverride property. Outline rendering is fully supported on SkeletonGraphic shaders as well.
  • Added SkeletonRenderer.EditorSkipSkinSync scripting API property to be able to set custom skins in editor scripts. Enable this property when overwriting the Skeleton's skin from an editor script. Without setting this parameter, changes will be overwritten by the next inspector update. Only affects Inspector synchronisation of skin with initialSkinName, not startup initialization.
  • All Spine/SkeletonGraphic shaders now provide a parameter CanvasGroup Compatible which can be enabled to support CanvasGroup alpha blending. For correct results, you should then disable Pma Vertex Colors in the SkeletonGraphic Inspector, in section Advanced (otherwise Slot alpha will be applied twice).

  • Now supporting Universal Render Pipeline (URP), including the 2D Renderer pipeline, through an additional UPM package.

    • Installation: You can download the Unity Package Manager (UPM) package via the download page or find it in the spine-runtimes/spine-unity/Modules subdirectory on the git repository. You can then either unzip (copy if using git) the package to

      • a) the Packages directory in your project where it will automatically be loaded, or
      • b) to an arbitrary directory outside the Assets directory and then open Package Manager in Unity, select the + icon, choose Add package from disk.. and point it to the package.json file.

      The Project panel should now show an entry Spine Universal RP Shaders under Packages. If the directory is not yet listed, you will need to close and re-open Unity to have it display the directory and its contents.

    • Usage: The package provides two shaders specifically built for the universal render pipeline:

      • Universal Render Pipeline/Spine/Skeleton, as a universal variant of the Spine/Skeleton shader,
      • Universal Render Pipeline/Spine/Skeleton Lit, as a universal variant of the Spine/Skeleton Lit shader,
      • Universal Render Pipeline/Spine/Sprite, as a universal variant of the Spine/Sprite/Vertex Lit and Pixel Lit shaders, which were not functioning in the universal render pipeline,
    • Universal Render Pipeline/2D/Spine/Skeleton Lit, as a universal 2D Renderer variant of the Spine/Skeleton Lit shader, and
      • Universal Render Pipeline/2D/Spine/Sprite, as a universal 2D Renderer variant of the Spine/Sprite/Vertex Lit and Pixel Lit shaders. The shaders can be assigned to materials as usual and will respect your settings of the assigned UniversalRenderPipelineAsset under Project Settings - Graphics.
    • Restrictions As all Spine shaders, the URP shaders do not support Premultiply alpha (PMA) atlas textures in Linear color space. Please export your atlas textures as straight alpha textures with disabled Premultiply alpha setting when using Linear color space. You can check the current color space via Project Settings - Player - Other Settings - Color Space..
    • Example: You can find an example scene in the package under com.esotericsoftware.spine.urp-shaders-3.8/Examples/URP Shaders.unity that demonstrates usage of the URP shaders.

  • Spine Preferences now provide an Atlas Texture Settings parameter for applying customizable texture import settings at all newly imported Spine atlas textures. When exporting atlas textures from Spine with Premultiply alpha enabled (the default), you can leave it at PMATexturePreset. If you have disabled Premultiply alpha, set it to the included StraightAlphaTexturePreset asset. You can also create your own TextureImporter Preset asset and assign it here (include PMA or Straight in the name). In Unity versions before 2018.3 you can use Texture2D template assets instead of the newer Preset assets. Materials created for imported textures will also have the Straight Alpha Texture parameter configured accordingly.

  • All Sprite shaders (including URP and LWRP extension packages) now provide an additional Fixed Normal Space option World-Space. PReviously options were limited to View-Space and Model-Space.
  • SkeletonGraphic now fully supports SkeletonUtility for generating a hierarchy of SkeletonUtilityBones in both modes Follow and Override. This also enables creating hinge chain physics rigs and using SkeletonUtilityConstraints such as SkeletonUtilityGroundConstraint and SkeletonUtilityEyeConstraint on SkeletonGraphic.
  • Added OnMeshAndMaterialsUpdated callback event to SkeletonRenderer and SkeletonGraphic. It is issued at the end of LateUpdate, before rendering.
  • Added Skeleton-OutlineOnly single pass shader to LWRP and URP extension modules. It can be assigned to materials as Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly. This allows for separate outline child GameObjects that reference the existing Mesh of their parent, and re-draw the mesh using this outline shader.
  • Added example component RenderExistingMesh to render a mesh again with different materials, as required by the new Skeleton-OutlineOnly shaders. In URP the outline has to be rendered via a separate GameObject as URP does not allow multiple render passes. To add an outline to your SkeletenRenderer:
    1. Add a child GameObject and move it a bit back (e.g. position Z = 0.01).
    2. Add a RenderExistingMesh component, provided in the Spine Examples/Scripts/Sample Components directory.
    3. Copy the original material, add _Outline to its name and set the shader to Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly.
    4. Assign this _Outline material at the RenderExistingMesh component under Replacement Materials.
  • Added Outline Shaders URP example scene to URP extension module to demonstrate the above additions.
  • Added support for Unity's SpriteAtlas as atlas provider (as an alternative to .atlas.txt and .png files) alongside a skeleton data file. There is now an additional Spine SpriteAtlas Import tool window accessible via Window - Spine - SpriteAtlas Import. Additional information can be found in a new section on the spine-unity documentation page.
  • Added support for multiple atlas textures at SkeletonGraphic. You can enable this feature by enabling the parameter Multiple CanvasRenders in the Advanced section of the SkeletonGraphic Inspector. This automatically creates the required number of child CanvasRenderer GameObjects for each required draw call (submesh).
  • Added support for Render Separator Slots at SkeletonGraphic. Render separation can be enabled directly in the Advanced section of the SkeletonGraphic Inspector, it does not require any additional components (like SkeletonRenderSeparator or SkeletonPartsRenderer for SkeletonRenderer components). When enabled, additional separator GameObjects will be created automatically for each separation part, and CanvasRenderer GameObjects re-parented to them accordingly. The separator GameObjects can be moved around and re-parented in the hierarchy according to your requirements to achieve the desired draw order within your Canvas. A usage example can be found in the updated Spine Examples/Other Examples/SkeletonRenderSeparator scene.
  • Added SkeletonGraphicCustomMaterials component, providing functionality to override materials and textures of a SkeletonGraphic, similar to SkeletonRendererCustomMaterials. Note: overriding materials or textures per slot is not provided due to structural limitations.
  • Added Root Motion support for SkeletonAnimation, SkeletonMecanim and SkeletonGraphic via new components SkeletonRootMotion and SkeletonMecanimRootMotion. The SkeletonAnimation and SkeletonGraphic component Inspector now provides a line Root Motion with Add Component and Remove Component buttons to add/remove the new SkeletonRootMotion component to your GameObject. The SkeletonMecanim Inspector detects whether root motion is enabled at the Animator component and adds a SkeletonMecanimRootMotion component automatically.
  • SkeletonMecanim now provides an additional Custom MixMode parameter under Mecanim Translator. It is enabled by default in version 3.8 to maintain current behaviour, using the set Mix Mode for each Mecanim layer. When disabled, SkeletonMecanim will use the recommended MixMode according to the layer blend mode. Additional information can be found in the Mecanim Translator section on the spine-unity documentation pages.
  • Added SkeletonGraphic Timeline support. Added supprot for multi-track Timeline preview in the Editor outside of play mode (multi-track scrubbing). See the Timeline-Extension-UPM-Package section of the spine-unity documentation for more information.
  • Added support for double-sided lighting at all SkeletonLit shaders (including URP and LWRP packages).
  • Added frustum culling update mode parameters Update When Invisible (Inspector parameter) and UpdateMode (available via code) to all Skeleton components. This provides a simple way to disable certain updates when the Renderer is no longer visible (outside all cameras, culled in frustum culling). The new UpdateMode property allows disabling updates at a finer granularity level than disabling the whole component. Available modes are: Nothing, OnlyAnimationStatus, EverythingExceptMesh and FullUpdate.
  • Added a new Spine/Outline/OutlineOnly-ZWrite shader to provide correct outline-only rendering. Note: the shader requires two render passes and is therefore not compatible with URP. The Spine Examples/Other Examples/Outline Shaders example scene has been updated to demonstrate the new shader.
  • Added OnMeshAndMaterialsUpdated callback event to SkeletonRenderSeparator and SkeletonPartsRenderer. It is issued at the end of LateUpdate, before rendering.
  • Added Root Motion Scale X/Y parameters to SkeletonRootMotionBase subclasses (SkeletonRootMotion and SkeletonMecanimRootMotion). Also providing AdjustRootMotionToDistance() and other methods to allow for easy delta compensation. Delta compensation can be used to e.g. stretch a jump to a given distance. Root motion can be adjusted at the start of an animation or every frame via skeletonRootMotion.AdjustRootMotionToDistance(targetPosition - transform.position, trackIndex);.
  • Now providing a Canvas Group Tint Black parameter at the SkeletonGraphic Inspector in the Advanced section. When using the Spine/SkeletonGraphic Tint Black shader you can enable this parameter to receive proper blending results when using Additive blend mode under a CanvasGroup. Be sure to also have the parameter CanvasGroup Compatible enabled at the shader. Note that the normal Spine/SkeletonGraphic does not support Additive blend mode at a CanvasGroup, as it requires additional shader channels to work.
  • Added Mix and Match Skins example scene to demonstrate how the 3.8 Skin API and combining skins can be used for a wardrobe and equipment use case.
  • Spine Timeline Extensions: Added Hold Previous parameter at SpineAnimationStateClip.
  • Added more warning messages at incompatible SkeletonRenderer/SkeletonGraphic Component vs Material settings. They appear both as an info box in the Inspector as well as upon initialization in the Console log window. The Inspector box warnings can be disabled via Edit - Preferences - Spine.
  • Now providing BeforeApply update callbacks at all skeleton animation components (SkeletonAnimation, SkeletonMecanim and SkeletonGraphic).
  • Added BoundingBoxFollowerGraphic component. This class is a counterpart of BoundingBoxFollower that can be used with SkeletonGraphic.
  • Added Inspector context menu functions SkeletonRenderer - Add all BoundingBoxFollower GameObjects and SkeletonGraphic - Add all BoundingBoxFollowerGraphic GameObjects that automatically generate bounding box follower GameObjects for every BoundingBoxAttachment for all skins of a skeleton.
  • GetRemappedClone() now provides an additional parameter pivotShiftsMeshUVCoords for MeshAttachment to prevent uv shifts at a non-central Sprite pivot. This parameter defaults to true to maintain previous behaviour.
  • SkeletonRenderer components now provide an additional update mode Only Event Timelines at the Update When Invisible property. This mode saves additional timeline updates compared to update mode Everything Except Mesh.
  • Now all URP (Universal Render Pipeline) and LWRP (Lightweight Render Pipeline) shaders support SRP (Scriptable Render Pipeline) batching. See Unity SRPBatcher documentation pages for additional information.
  • Sprite shaders now provide four Diffuse Ramp modes as an Inspector Material parameter: Hard, Soft, Old Hard and Old Soft. In spine-unity 3.8 it defaults to Old Hard to keep the behaviour of existing projects unchanged. From 4.0 on it defaults to Hard for newly created materials while existing ones remain unchanged. Note that Old Hard and Old Soft ramp versions were using only the right half of the ramp texture, and additionally multiplying the light intensity by 2, both leading to brighter lighting than without a ramp texture active. The new ramp modes Hard and Soft use the full ramp texture and do not modify light intensity, being consistent with lighting without a ramp texture active.
  • Added native support for slot blend modes Additive, Multiply and Screen with automatic assignment at newly imported skeleton assets. BlendModeMaterialAssets are now obsolete and replaced by the native properties at SkeletonDataAsset. The SkeletonDataAsset Inspector provides a new Blend Modes - Upgrade button to upgrade an obsolete BlendModeMaterialAsset to the native blend modes properties. This upgrade will be performed automatically on imported and re-imported assets in Unity 2020.1 and newer to prevent reported BlendModeMaterialAsset issues in these Unity versions. spine-unity 4.0 and newer will automatically perform this upgrade regardless of the Unity version.
  • BoneFollower and BoneFollowerGraphic components now provide better support for following bones when the skeleton's Transform is not the parent of the follower's Transform. Previously e.g. rotating a common parent Transform did not lead to the desired result, as well as negatively scaling a skeleton's Transform when it is not a parent of the follower's Transform.
  • URP and LWRP Sprite and SkeletonLit shaders no longer require Advanced - Add Normals enabled to properly cast and receive shadows. It is recommended to disable Add Normals if normals are otherwise not needed.
  • Added an example component RootMotionDeltaCompensation located in Spine Examples/Scripts/Sample Components which can be used for applying simple delta compensation. You can enable and disable the component to toggle delta compensation of the currently playing animation on and off.
  • Root motion delta compensation now allows to only adjust X or Y components instead of both. Adds two parameters to SkeletonRootMotionBase.AdjustRootMotionToDistance() which default to adjusting both X and Y as before. The RootMotionDeltaCompensation example component exposes these parameters as public attributes.
  • Root motion delta compensation now allows to also add translation root motion to e.g. adjust a horizontal jump upwards or downwards over time. This is necessary because a Y root motion of zero cannot be scaled to become non-zero.
  • Attachment.GetRemappedClone(Sprite) method now provides an additional optional parameter useOriginalRegionScale. When set to true, the replaced attachment's scale is used instead of the Sprite's Pixel per Unity setting, allowing for more consistent scaling. Note: When remapping Sprites, be sure to set the Sprite's Mesh Type to Full Rect and not Tight, otherwise the scale will be wrong.

• Changes of default values

  • SkeletonMecanim's Layer Mix Mode now defaults to MixMode.MixNext instead of MixMode.MixAlways.
  • BlendModeMaterialAsset and it's instance Default BlendModeMaterials.asset now have Apply Additive Material set to true by default in order to apply all blend modes by default.

• Deprecated

  • Deprecated Modules/SlotBlendModes/SlotBlendModes component. Changed namespace from Spine.Unity.Modules to Spine.Unity.Deprecated. Moved to Deprecated/SlotBlendModes.

• Restructuring (Non-Breaking)

  Note: The following changes will most likely not affect users of the Spine-Unity runtime as the API remains unchanged and no references are invalidated.

  • Removed duplicates of .cginc files in Modules/Shaders/Sprite that were also present in the Modules/Shaders/Sprite/CGIncludes directory.
  • Moved shaders from Modules/Shaders to Shaders directory.
  • Moved shaders from Modules/SkeletonGraphic/Shaders to Shaders/SkeletonGraphic.
  • Renamed shader Shaders/Spine-SkeletonLit.shader to Shaders/Spine-Skeleton-Lit.shader.
  • Moved components from SkeletonGraphic to Components and Components/Following except for SkeletonGraphicMirror which was moved to Spine Examples/Scripts/Sample Components.
  • Moved BoneFollower, BoneFollowerGraphic and PointFollower from Components directory to Components/Following.
  • Moved BoundingBoxFollower component from Modules/BoundingBoxFollower to Components/Following.
  • Moved Modules/SkeletonRenderSeparator directory to Components/SkeletonRenderSeparator.
  • Moved Modules/CustomMaterials directory to Components/SkeletonRendererCustomMaterials.
  • Moved Asset Types/BlendModeMaterialsAsset.cs class, Shaders/BlendModes/Default BlendModeMaterials.asset and materials from Shaders/BlendModes to SkeletonDataModifierAssets/BlendModeMaterials directory.
  • Moved Modules/Ghost directory to Spine Examples/Scripts/Sample Components/Ghost.
  • Moved Modules/SkeletonUtility Modules directory to Spine Examples/Scripts/Sample Components/SkeletonUtility Modules.
  • Moved Modules/AnimationMatchModifier directory to Spine Examples/Scripts/MecanimAnimationMatchModifier.
  • Moved SkeletonRagdoll and SkeletonRagdoll2D components from Modules/Ragdoll directory to Spine Examples/Scripts/Sample Components/SkeletonUtility Modules.
  • Moved AttachmentTools.cs to Utility directory.
  • Split the file AttachmentTools into 5 separate files for each contained class. No namespace or other API changes performed.
  • Split the file Mesh Generation/SpineMesh into 4 separate files for each contained class. No namespace or other API changes performed.
  • Moved SkeletonExtensions.cs to Utility directory.
  • Moved Modules/YieldInstructions directory to Utility/YieldInstructions.
  • Moved corresponding editor scripts of the above components to restructured directories as well.
  • Renamed inspector editor class PointFollowerEditor to PointFollowerInspector for consistency reasons.

XNA/MonoGame

• Updated to latest MonoGame version 3.7.1
• Rewrote example project to be cleaner and better demonstrate basic Spine features.
• Added mix-and-match example to demonstrate the new Skin API.
• Added normalmap support via SpineEffectNormalmap and support for loading multiple texture layers following a suffix-pattern. Please see the example code on how to use them.

Java

• Breaking changes

  • Renamed Slot#getAttachmentVertices() to Slot#getDeform().
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin#addAttachment() to Skin#setAttachment().
  • Removed VertexAttachment#applyDeform() and replaced it with VertexAttachment#deformAttachment. The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from MeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • JsonRollback tool now converts from 3.8 JSON to 3.7.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.

• Additions

  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin#getAttachments(). Returns all attachments in the skin.
    • Added Skin#getAttachments(int slotIndex). Returns all attachements in the skin for the given slot index.
    • Added Skin#addSkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin#copySkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
  • Added Attachment#copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment#newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.

libGDX

• SkeletonViewer can load a skeleton by specifying it as the first argument on the command line.
• Added mix-and-match example to demonstrate the new Skin API.

Lua

• Breaking changes

  • Renamed Slot:getAttachmentVertices() to Slot#deform.
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin:addAttachment() to Skin#setAttachment().
  • Removed VertexAttachment:applyDeform() and replaced it with VertexAttachment#deformAttachment. The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from MeshAttachment.
  • Changed the .json file format to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.

• Additions

  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin:getAttachments(). Returns all attachments in the skin.
    • Added Skin:getAttachments(slotIndex). Returns all attachements in the skin for the given slot index.
    • Added Skin:addSkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin:copySkin(Skin skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
  • Added Attachment:copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment:newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.

Love2D

• Added support for 0-1 RGBA color component range change in Löve 0.11+. Older Löve versions using the 0-255 range are still supported!
• Added mix-and-match example to demonstrate the new Skin API.

Corona

• Added mix-and-match example to demonstrate the new Skin API.

Typescript/Javascript

• Breaking changes

  • Renamed MixDirection.in/out to MixDirection.mixIn/mixOut as it was crashing a JS compressor.
  • Renamed Slot#getAttachmentVertices() to Slot#getDeform().
  • Changed the .json curve format and added more assumptions for omitted values, reducing the average size of JSON exports.
  • Renamed Skin#addAttachment() to Skin#setAttachment().
  • Removed VertexAttachment#applyDeform() and replaced it with VertexAttachment#deformAttachment. The attachment set on this field is used to decide if a DeformTimeline should be applied to the attachment active on the slot to which the timeline is applied.
  • Removed inheritDeform field, getter, and setter from MeshAttachment.
  • Changed .skel binary format, added a string table. References to strings in the data resolve to this string table, reducing storage size of binary files considerably.
  • Changed the .json and .skel file formats to accomodate the new feature and file size optimiations. Old projects must be exported with Spine 3.8.20+ to be compatible with the 3.8 Spine runtimes.
  • Updated runtime to be compatible with TypeScript 3.6.3.

• Additions

  • Added support for loading binary data via AssetManager#loadBinary(). AssetManager#get() will return a Uint8Array for such assets.
  • Added support for loading binaries via new SkeletonBinary. Parses a Uint8Array.
  • Added x and y coordinates for setup pose AABB in SkeletonData.
  • Added support for rotated mesh region UVs.
  • Added skin-specific bones and constraints which are only updated if the skeleton's current skin contains them.
  • Improved Skin API to make it easier to handle mix-and-match use cases.
    • Added Skin#getAttachments(). Returns all attachments in the skin.
    • Added Skin#getAttachments(slotIndex: number). Returns all attachements in the skin for the given slot index.
    • Added Skin#addSkin(skin: Skin). Adds all attachments, bones, and skins from the specified skin to this skin.
    • Added Skin#copySkin(skin: Skin). Adds all attachments, bones, and skins from the specified skin to this skin. VertexAttachment are shallowly copied and will retain any parent mesh relationship. All other attachment types are deep copied.
  • Added Attachment#copy() to all attachment type implementations. This lets you deep copy an attachment to modify it independently from the original, i.e. when programmatically changing texture coordinates or mesh vertices.
  • Added MeshAttachment#newLinkedMesh(), creates a linked mesh linkted to either the original mesh, or the parent of the original mesh.
  • Added IK softness.
  • Added AssetManager.setRawDataURI(path, data). Allows to embed data URIs for skeletons, atlases and atlas page images directly in the HTML/JS without needing to load it from a separate file.
  • Added AssetManager.loadAll() to allow Promise/async/await based waiting for completion of asset load. See the spine-canvas examples.
  • Added Skeleton.getBoundRect() helper method to calculate the bouding rectangle of the current pose, returning the result as { x, y, width, height }. Note that this method will create temporary objects which can add to garbage collection pressure.

WebGL backend

• Input can now take a partially defined implementation of InputListener.
• Added mix-and-match example to demonstrate the new Skin API.

Canvas backend

Three.js backend

• SkeletonMesh now takes an optional SkeletonMeshMaterialParametersCustomizer function that allows you to modify the ShaderMaterialParameters before the material is finalized. Use it to modify things like THREEJS' Material.depthTest etc. See #1590.

Player

• SpinePlayer#setAnimation() can now be called directly to set the animation being displayed.
• The player supports loading .skel binary skeleton files by setting the SpinePlayerConfig#skelUrl field instead of SpinePlayerConfig#jsonUrl.
• Added SpinePlayerConfig#rawDataURIs. Allows to embed data URIs for skeletons, atlases and atlas page images directly in the HTML/JS without needing to load it from a separate file. See the example for a demonstration.

3.7

AS3

• Breaking changes
  • The completion event will fire for looped 0 duration animations every frame.
  • MixPose is now called MixBlend
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
• Additions
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call TrackEntry#setMixBlend(MixBlend.add) on each track. To specify the blend percentage, set TrackEntry#alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion.
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • TrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.

Starling

• Added support for vertex effects. See RaptorExample.as
• Added 'getTexture()' method to 'StarlingTextureAtlasAttachmentLoader'
• Breaking change: if a skeleton requires two color tinting, you have to enable it via SkeletonSprite.twoColorTint = true. In this case the skeleton will use the TwoColorMeshStyle, which internally uses a different vertex layout and shader. This means that skeletons with two color tinting enabled will break batching and hence increase the number of draw calls in your app.
• Added VertexEffect and implementations JitterEffect and SwirlEffect. Allows you to modify vertices before they are submitted for drawing. See Starling changes.
• Fix issues with StarlingAtlasAttachmentLoader, see https://github.com/EsotericSoftware/spine-runtimes/issues/939
• Fix issues with region trimming support, see https://github.com/EsotericSoftware/spine-runtimes/commit/262bc26c64d4111002d80e201cb1a3345e6727df
• Added support for overriding StarlingAtlasAttachmentLoader#getTexture(), see https://github.com/EsotericSoftware/spine-runtimes/commit/ea7dbecb98edc74e439aa9ef90dcf6eed865f718
• Texture atlas operations are no longer handled in Starling#newRegionAttachment and Starling#newMeshAttachment but delegated to the atlas.
• Added sample for additive animation blending, see https://github.com/EsotericSoftware/spine-runtimes/blob/6a556de01429878df47bb276a97959a8bdbbe32f/spine-starling/spine-starling-example/src/spine/examples/OwlExample.as
• Added sample on how to use bounding box attachment vertices https://github.com/EsotericSoftware/spine-runtimes/commit/e20428b02699226164fa73ba4b12f7d029ae6f4d
• Fully transparent meshes are not submitted for rendering.
• No hit-tests are performed when a skeleton is invisible.

C

• Breaking changes
  • Listeners on spAnimationState and spTrackEntry will now also be called if a track entry gets disposed as part of disposing an animation state.
  • The completion event will fire for looped 0 duration animations every frame.
  • The spine-cocos2dx and spine-ue4 runtimes are now based on spine-cpp. See below for changes.
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
  • spMeshAttachment has two new fields regionTextureWith and regionTextureHeight. These must be set in custom attachment loader. See AtlasAttachmentLoader.
• Additions
  • Added support for local and relative transform constraint calculation, including additional fields in spTransformConstraintData.
  • Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans
  • Added spVertexEffect and corresponding implementations spJitterVertexEffect and spSwirlVertexEffect. Create/dispose through the corresponding spXXXVertexEffect_create()/dispose() functions. Set on framework/engine specific renderer.
  • Functions in extension.h are not prefixed with _sp instead of just _ to avoid interference with other libraries.
  • Introduced SP_API macro. Every spine-c function is prefixed with this macro. By default, it is an empty string. Can be used to markup spine-c functions with e.g. __declspec` when compiling to a dll or linking to that dll.
  • Added void *userData to spAnimationStateto be consumed in callbacks.
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call spTrackEntry->mixBlend = SP_MIXBLEND_ADD) on each track. To specify the blend percentage, set spTrackEntry->alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion.
  • Optimized attachment lookup to give a 40x speed-up. See https://github.com/EsotericSoftware/spine-runtimes/commit/cab81276263890b65d07fa2329ace16db1e365ff
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • spTrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.

Cocos2d-Objc

• Added vertex effect support to modify vertices of skeletons on the CPU. See RaptorExample.m.
• Explanation how to handle ARC, see https://github.com/EsotericSoftware/spine-runtimes/commit/a4f122b08c5e2a51d6aad6fc5a947f7ec31f2eb8
• The super class ::update() method of SkeletonRenderer is now called, see https://github.com/EsotericSoftware/spine-runtimes/commit/f7bb98185236a6d8f35bfefc70afe4f31e9ec9d2
• Added improved tint-black shader.

SFML

• spine-sfml.h no longer defines SPINE_SHORT_NAMES to avoid collisions with other APIs. See #1058.
• Added support for vertex effects. See raptor example.
• Added premultiplied alpha support to SkeletonDrawable. Use SkeletonDrawable::setUsePremultipliedAlpha(), see https://github.com/EsotericSoftware/spine-runtimes/commit/34086c1f41415309b2ecce86055f6656fcba2950
• Added additive animation blending sample, see https://github.com/EsotericSoftware/spine-runtimes/blob/b7e712d3ca1d6be3ebcfe3254dc2cea9c44dda71/spine-sfml/example/main.cpp#L369

C++

• ** Additions **
  • Added C++ Spine runtime. See the spine-cpp Runtime Guide for more information on spine-cpp.
  • Added parsing of non-essential data (fps, images path, audio path) to for .json/.skel parsers.

Cocos2d-x

• Added ETC1 alpha support, thanks @halx99! Does not work when two color tint is enabled.
• Added spAtlasPage_setCustomTextureLoader() which let's you do texture loading manually. Thanks @jareguo.
• Added SkeletonRenderer:setSlotsRange() and SkeletonRenderer::createWithSkeleton(). This allows you to split rendering of a skeleton up into multiple parts, and render other nodes in between. See SkeletonRendererSeparatorExample.cpp for an example.
• Fully transparent attachments will not be rendered, improving rendering performance.
• Added improved tint-black shader.
• Updated to cocos2d-x 3.16
• The skeleton setup pose and world transform are now calculated on initialization to avoid flickering on start-up.
• Updated to cocos2d-x 3.17.1
• Breaking change: Switched from spine-c to spine-cpp as the underlying Spine runtime. See the spine-cpp Runtime Guide for more information on spine-cpp.
  • Added Cocos2dAttachmentLoader to be used when constructing an Atlas. Used by default by SkeletonAnimation and SkeletonRenderer when creating instances via the createXXX methods.
  • All C structs and enums spXXX have been replaced with their C++ equivalents spine::XXX in all public interfaces.
  • All instantiations via new of C++ classes from spine-cpp should contain (__FILE__, __LINE__). This allows the tracking of instantations and detection of memory leaks via the spine::DebugExtension.

SFML

• Create a second SFML backend using spine-cpp. See the spine-cpp Runtime Guide for more information on spine-cpp.
• Added support for vertex effects. See raptor example.
• Added premultiplied alpha support to SkeletonDrawable. Use SkeletonDrawable::setUsePremultipliedAlpha(), see https://github.com/EsotericSoftware/spine-runtimes/commit/34086c1f41415309b2ecce86055f6656fcba2950
• Added additive animation blending sample, see https://github.com/EsotericSoftware/spine-runtimes/blob/b7e712d3ca1d6be3ebcfe3254dc2cea9c44dda71/spine-sfml/example/main.cpp#L369

UE4

• spine-c is now exposed from the plugin shared library on Windows via __declspec.
• Updated to Unreal Engine 4.18
• Added C++ example, see https://github.com/EsotericSoftware/spine-runtimes/commit/15011e81b7061495dba45e28b4d3f4efb10d7f40
• SkeletonRendererComponent generates collision meshes by default.
• Disabled generation of collision meshes by SkeletonRendererComponent. Both ProceduralMeshComponent and RuntimeMeshComponent have a bug that generates a new PhysiX file every frame per component. Users are advised to add a separate collision shape to the root scene component of an actor instead.
• Using UE4 FMemory allocator by default. This should fix issues on some consoles.
• Breaking change moved away from RuntimeMeshComponent, as its maintainance has seized, back to ProceduralMeshComponent. Existing projects should just work. However, if you run into issues, you may have to remove the old SpineSkeletonRendererComponent and add a new one to your existing actors.
• Breaking change due to the removal of RuntimeMeshComponent and reversal to ProceduralMeshComponent, two color tinting is currently not supported. ProceduralMeshComponent does not support enough vertex attributes for us to encode the second color in the vertex stream. You can remove the RuntimeMeshComponent/ directory from your plugins directory and remove the component from any build.cs files that may reference it.
• Breaking change: Switched from spine-c to spine-cpp as the underlying Spine runtime. See the spine-cpp Runtime Guide for more information on spine-cpp.
• All C structs and enums spXXX have been replaced with their C++ equivalents spine::XXX in all public interfaces.
• All instantiations via new of C++ classes from spine-cpp should contain (__FILE__, __LINE__). This allows the tracking of instantations and detection of memory leaks via the spine::DebugExtension.
• Updated to Unreal Engine 4.20 (samples require 4.17+), see the spine-ue4/Plugins/SpinePlugin/Source/SpinePlugin/SpinePlugin.build.cs file on how to compile in 4.20 with the latest UBT API changes.
• Updated to Unreal Engine 4.21 (samples require 4.21).
• Breaking change: UBoneDriverComponent and UBoneFollowerComponent are now USceneComponent instead of UActorComponent. They either update only themselves, or also the owning UActor, depending on whether the new flag UseComponentTransform is set. See https://github.com/EsotericSoftware/spine-runtimes/pull/1175
• Added query methods for slots, bones, skins and animations to SpineSkeletonComponent and UTrackEntry. These allow you to query these objects by name in both C++ and blueprints.
• Added Preview Animation and Preview Skin properties to SpineSkeletonAnimationComponent. Enter an animation or skin name to live-preview it in the editor. Enter an empty string to reset the animation or skin.

C

• Breaking changes
  • The completion event will fire for looped 0 duration animations every frame.
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
• Additions
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call TrackEntry#MixBlend = MixBlend.add on each track. To specify the blend percentage, set TrackEntry#Alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion.
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • TrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.

Unity

• Runtime and Editor, and Assembly Definition Files and folders have been reorganized into "Runtime" and "Editor". Each of these have an .asmdef file that defines these separately as their own assembly in Unity (Note: Spine .asmdef files are currently deactivated to .txt extension, see below). For projects not using assembly definition, you may delete the .asmdef files. These assembly definitions will be ignored by older versions of Unity that don't support it.
  • In this scheme, the entirety of the base spine-csharp runtime is inside the "Runtime" folder, to be compiled in the same assembly as spine-unity so they can continue to share internal members.
• Spine .asmdef files are now deactivated (using .txt extension) by default This prevents problems when updating Spine through unitypackages, overwriting the Timeline reference entry in spine-unity.asmdef (added automatically when enabling Unity 2019 Timeline support, see Timeline Support for Unity 2019), causing compile errors. In case you want to enable the .asmdef files, rename the files: Spine/Runtime/spine-unity.txt to Spine/Runtime/spine-unity.asmdef and Spine/Editor/spine-unity-editor.txt to Spine/Editor/spine-unity-editor.asmdef.
• SkeletonAnimator is now SkeletonMecanim The Spine-Unity Mecanim-driven component SkeletonAnimator has been renamed SkeletonMecanim to make it more autocomplete-friendly and more obvious at human-glance. The .meta files and guids should remain intact so existing projects and prefabs should not break. However, user code needs to be updated to use SkeletonMecanim.
• SpineAtlasAsset The existing AtlasAsset type has been renamed to SpineAtlasAsset to signify that it specifically uses a Spine/libGDX atlas as its source. Serialization should be intact but user code will need to be updated to refer to existing atlases as SpineAtlasAsset.
  • AtlasAssetBase SpineAtlasAsset now has an abstract base class called SpineAtlasAsset. This is the base class to derive when using alternate atlas sources. Existing SkeletonDataAsset field "atlasAssets" now have the "AtlasAssetBase" type. Serialization should be intact, but user code will need to be updated to refer to the atlas assets accordingly.
  • This change is in preparation for alternate atlas options such as Unity's SpriteAtlas.
• Optional Straight Alpha for shaders Spine-Unity's included Unity shaders now have a _STRAIGHT_ALPHA_INPUT shader_feature, toggled as a checkbox in the Material's inspector. This allows the Material to use a non-premultiplied alpha/straight alpha input texture.
  • The following shaders now have the "Straight Alpha Texture" checkbox when used on a material:
    • Spine/Skeleton
    • Spine/Skeleton Tint Black
    • Spine/Skeleton Lit
    • Spine/Skeleton Tint
    • Spine/Skeleton Fill
    • Spine/SkeletonGraphic (Premultiply Alpha) was renamed to Spine/SkeletonGraphic
    • Spine/SkeletonGraphic Tint Black (Premultiply Alpha) was renamed to Spine/SkeletonGraphic Tint Black
    • Spine/Skeleton PMA Multiply
    • Spine/Skeleton PMA Screen
  • Dedicated straight alpha shaders were removed from the runtime.
    • Spine/Straight Alpha/Skeleton Fill
    • Spine/Straight Alpha/Skeleton Tint
• Detection of Incorrect Texture Settings Especially when atlas textures are exported with setting Premultiply alpha enabled, it is important to configure Unity's texture import settings correctly. By default, you will now receive warnings where texture settings are expected to cause incorrect rendering.
  • The following rules apply:
    • sRGB (Color Texture) shall be disabled when Generate Mip Maps is enabled, otherwise you will receive white border outlines.
    • Alpha Is Transparency shall be disabled on Premultiply alpha textures, otherwise you will receive light ghosting artifacts in transparent areas.
  • These warnings can be disabled in Edit - Preferences - Spine.
• Sprite Mask Support for all Included Shaders The Skeleton Animation and Skeleton Mecanim components now provide an additional Mask Interaction field in the Inspector, covering identical functionality as Unity's built in Sprite Renderer component:
  • Mask Interaction modes:
    • None - The sprite will not interact with the masking system. Default behavior.
    • Visible Inside Mask - The sprite will be visible only in areas where a mask is present.
    • Visible Outside Mask - The sprite will be visible only in areas where no mask is present.
  • Automatically Generated Materials When switching Mask Interaction modes in the Inspector outside of Play mode, the required additional material assets are generated for the respective Stencil Compare parameters - with file suffixes '_InsideMask' and '_OutsideMask', placed in the same folder as the original materials. By default all generated materials are kept as references by the Skeleton Animation component for switching at runtime. These materials can be managed and optimized via the SkeletonAnimation's Advanced section:
    • Using the Clear button you can clear the reference to unneeded materials,
    • Using the Delete button the respective assets are deleted as well as references cleared. Note that other Skeleton Animation GameObjects might still reference the materials, so use with caution!
    • With the Set button you can again assign a link to the respective materials to prepare them for runtime use. If the materials were not present or have been deleted, they are generated again based on the default materials.
  • When switching Mask Interaction mode at runtime, the previously prepared materials are switched active automatically. When the respective materials have not been prepared, material copies of the default materials are created on the fly. Note that these materials are not shared between similar Skeleton Animation GameObjects, so it is recommended to use the generated material assets where possible.
  • Every shader now exposes the Stencil Compare parameter for further customization. This way you have maximum flexibility to use custom mechanisms to switch materials at runtime if you should ever need more than the three materials generated by Skeleton Animation's Mask Interaction parameter. Reference Stencil Compare values are:
    • CompareFunction.Disabled for Mask Interaction - None
    • CompareFunction.LessEqual for Mask Interaction - Visible Inside Mask
    • CompareFunction.Greater for Mask Interaction - Visible Outside Mask
• RectMask2D Support for SkeletonGraphic Both SkeletonGraphic shaders 'Spine/SkeletonGraphic' and 'Spine/SkeletonGraphic Tint Black' now respect masking areas defined via Unity's RectMask2D component.
• Timeline Support for Unity 2019 using the existing Timeline components. By default, all Spine Timeline components are deactivated in Unity 2019 and can be activated via the Spine Preferences menu. This step became necessary because in Unity 2019, Timeline has been moved to a separate Package and is no longer included in the Unity core. Please visit Edit - Preferences - Spine and at Timeline Package Support hit Enable to automatically perform all necessary steps to activate the Timeline components. This will automatically:
  1. download the Unity Timeline package
  2. activate the Spine Timeline components by setting the compile definition SPINE_TIMELINE_PACKAGE_DOWNLOADED for all platforms
  3. modify the spine-unity.asmdef file by adding the reference to the Unity Timeline library.
• Added Create 2D Hinge Chain functionality at SkeletonUtilityBone inspector, previously only Create 3D Hinge Chain was available.

XNA/MonoGame

• Added support for any Effect to be used by SkeletonRenderer
• Added support for IVertexEffect to modify vertices of skeletons on the CPU. IVertexEffect instances can be set on the SkeletonRenderer. See example project.
• Added SkeletonDebugRenderer
• Made MeshBatcher of SkeletonRenderer accessible via a getter. Allows user to batch their own geometry together with skeleton meshes for maximum batching instead of using XNA SpriteBatcher.

Java

• Breaking changes
  • Skeleton attachments: Moved update of attached skeleton out of libGDX SkeletonRenderer, added overloaded method Skeleton#updateWorldTransform(Bone), used for SkeletonAttachment. You now MUST call this new method with the bone of the parent skeleton to which the child skeleton is attached. See SkeletonAttachmentTest for and example.
  • The completion event will fire for looped 0 duration animations every frame.
  • MixPose is now called MixBlend.
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
• Additions
  • Added EventData#audioPath field. This field contains the file name of the audio file used for the event.
  • Added convenience method to add all attachments from one skin to another, see https://github.com/EsotericSoftware/spine-runtimes/commit/a0b7bb6c445efdfac12b0cdee2057afa3eff3ead
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call TrackEntry#setMixBlend(MixBlend.add) on each track. To specify the blend percentage, set TrackEntry#alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion.
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • TrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.

libGDX

• Added VertexEffect interface, instances of which can be set on SkeletonRenderer. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect and VertexEffectTest.
• Added improved tint-black shader.
• Improved performance by avoiding batch flush when not switching between normal and additive rendering with PMA
• Improvements to skeleton viewer.
• TwoColorPolygonBatch implements the Batch interface, allowing to the be used with other libGDX classes that require a batcher for drawing, potentially improving performance. See https://github.com/EsotericSoftware/spine-runtimes/commit/a46b3d1d0c135d51f9bef9ca17a5f8e5dda69927
• Added SkeletonDrawable to render skeletons in scene2d UI https://github.com/EsotericSoftware/spine-runtimes/commit/b93686c185e2c9d5466969a8e07eee573ebe4b97

Lua

• Breaking changes
  • The completion event will fire for looped 0 duration animations every frame.
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
• Additions
  • Added JitterEffect and SwirlEffect and support for vertex effects in Corona and Love
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call TrackEntry:setMixBlend(MixBlend.add) on each track. To specify the blend percentage, set TrackEntry.alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion.
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • TrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.

Love2D

• Added support for vertex effects. Set an implementation like "JitterEffect" on Skeleton.vertexEffect. See main.lua for an example.

Corona

• Added support for vertex effects. Set an implementation like "JitterEffect" on SkeletonRenderer.vertexEffect. See main.lua for an example

Typescript/Javascript

• Breaking changes
  • The completion event will fire for looped 0 duration animations every frame.
  • Skeleton flipX/flipY has been replaced with scaleX/scaleY. This cleans up applying transforms and is more powerful. Allows scaling a whole skeleton which has bones that disallow scale inheritance
  • Mix time is no longer affected by TrackEntry#timeScale. See https://github.com/EsotericSoftware/spine-runtimes/issues/1194
• Additions
  • Added AssetManager.loadTextureAtlas. Instead of loading the .atlas and corresponding image files manually, you can simply specify the location of the .atlas file and AssetManager will load the atlas and all its images automatically. AssetManager.get("atlasname.atlas") will then return an instance of spine.TextureAtlas.
  • Added additive animation blending. When playing back multiple animations on different tracks, where each animation modifies the same skeleton property, the results of tracks with lower indices are discarded, and only the result from the track with the highest index is used. With animation blending, the results of all tracks are mixed together. This allows effects like mixing multiple facial expressions (angry, happy, sad) with percentage mixes. By default the old behaviour is retained (results from lower tracks are discarded). To enable additive blending across animation tracks, call TrackEntry#setMixBlend(MixBlend.add) on each track. To specify the blend percentage, set TrackEntry#alpha. See http://esotericsoftware.com/forum/morph-target-track-animation-mix-mode-9459 for a discussion. See https://github.com/EsotericSoftware/spine-runtimes/blob/f045d221836fa56191ccda73dd42ae884d4731b8/spine-ts/webgl/tests/test-additive-animation-blending.html for an example.
  • Added work-around for iOS WebKit JIT bug, see https://github.com/EsotericSoftware/spine-runtimes/commit/c28bbebf804980f55cdd773fed9ff145e0e7e76c
  • Support for stretchy IK
  • Support for audio events, see audioPath, volume and balance fields on event (data).
  • TrackEntry has an additional field called holdPrevious. It can be used to counter act a limitation of AnimationState resulting in "dipping" of parts of the animation. For a full discussion of the problem and the solution we've implemented, see this forum thread.
  • Added AssetManager#setRawDataURI(path, data). Allows to set raw data URIs for a specific path, which in turn enables embedding assets into JavaScript/HTML.
  • PolygonBatcher will now disable CULL_FACE and restore the state as it was before rendering.

WebGL backend

• Added VertexEffect interface, instances of which can be set on SkeletonRenderer. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect, and the example which allows to set effects.
• Added slotRangeStart and slotRangeEnd parameters to SkeletonRenderer#draw and SceneRenderer#drawSkeleton. This allows you to render only a range of slots in the draw order. See spine-ts/webgl/tests/test-slot-range.html for an example.
• Added improved tint-black shader.
• Added SceneRenderer#drawTextureUV(), allowing to draw a texture with manually specified texture coordinates.
• Exposed all renderers in SceneRenderer.

Canvas backend

• Added support for shearing and non-uniform scaling inherited from parent bones.
• Added support for alpha tinting.

Three.js backend

• Added VertexEffect interface, instances of which can be set on SkeletonMesh. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect.
• Added support for multi-page atlases

Widget backend

• Added fields atlasContent, atlasPagesContent, and jsonContent to WidgetConfiguration allowing you to directly pass the contents of the .atlas, atlas page .png files, and the .json file without having to do a request. See README.md and the example for details.
• SpineWidget.setAnimation() now takes an additional optional parameter for callbacks when animations are completed/interrupted/etc.

3.6

AS3

• Breaking changes

  • Removed Bone.worldToLocalRotationX and Bone.worldToLocalRotationY. Replaced by Bone.worldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • Made Bone fields _a, _b, _c, _d, _worldX and _worldY public, removed underscore prefix.
  • Removed VertexAttachment.computeWorldVertices overload, changed VertexAttachment.computeWorldVertices2 to VertexAttachment.computeWorldVertices, added stride parameter.
  • Removed RegionAttachment.vertices field. The vertices array is provided to RegionAttachment.computeWorldVertices by the API user now.
  • Removed RegionAttachment.updateWorldVertices, added RegionAttachment.computeWorldVertices. The new method now computes the x/y positions of the 4 vertices of the corner and places them in the provided worldVertices array, starting at offset, then moving by stride array elements when advancing to the next vertex. This allows to directly compose the vertex buffer and avoids a copy. The computation of the full vertices, including vertex colors and texture coordinates, is now done by the backend's respective renderer.
  • Replaced r, g, b, a fields with instances of new Color class in RegionAttachment, MeshAttachment, Skeleton, SkeletonData, Slot and SlotData.
  • The completion event will fire for looped 0 duration animations every frame.

• Additions

  • Added Skeleton.getBounds from reference implementation.
  • Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
  • Added Bone.localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added two color tinting support, including TwoColorTimeline and additional fields on Slot and SlotData.
  • Added PointAttachment, additional method newPointAttachment in AttachmentLoader interface.
  • Added ClippingAttachment, additional method newClippingAttachment in AttachmentLoader interface.
  • AnimationState#apply returns boolean indicating if any timeline was applied or not.
  • Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans
  • Added VertexEffect and implementations JitterEffect and SwirlEffect. Allows you to modify vertices before they are submitted for drawing. See Starling changes.

Starling

• Fixed renderer to work with 3.6 changes.
• Added support for two color tinting.
• Added support for clipping.
• Added support for rotated regions in texture atlas loaded via StarlingAtlasAttachmentLoader.
• Added support for vertex effects. See RaptorExample.as
• Added 'getTexture()' method to 'StarlingTextureAtlasAttachmentLoader'
• Breaking change: if a skeleton requires two color tinting, you have to enable it via SkeletonSprite.twoColorTint = true. In this case the skeleton will use the TwoColorMeshStyle, which internally uses a different vertex layout and shader. This means that skeletons with two color tinting enabled will break batching and hence increase the number of draw calls in your app.

C

• Breaking changes
  • spVertexAttachment_computeWorldVertices and spRegionAttachment_computeWorldVerticeS now take new parameters to make it possible to directly output the calculated vertex positions to a vertex buffer. Removes the need for additional copies in the backends' respective renderers.
  • Removed spBoundingBoxAttachment_computeWorldVertices, superseded by spVertexAttachment_computeWorldVertices.
  • Removed spPathAttachment_computeWorldVertices and spPathAttachment_computeWorldVertices1, superseded by spVertexAttachment_computeWorldVertices.
  • Removed sp_MeshAttachment_computeWorldVertices, superseded by spVertexAttachment_computeWorldVertices.
  • Removed spBone_worldToLocalRotationX and spBone_worldToLocalRotationY. Replaced by spBone_worldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • Replaced r, g, b, a fields with instances of new spColor struct in spRegionAttachment, spMeshAttachment, spSkeleton, spSkeletonData, spSlot and spSlotData.
  • Removed spVertexIndexfrom public API.
  • Listeners on spAnimationState or spTrackEntry will now be also called in case a track entry is disposed as part of dispoing the spAnimationState.
  • The completion event will fire for looped 0 duration animations every frame.
• Additions
  • Added support for local and relative transform constraint calculation, including additional fields in spTransformConstraintData.
  • Added spPointAttachment, additional method spAtlasAttachmentLoadeR_newPointAttachment.
  • Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
  • Added spBone_localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added two color tinting support, including spTwoColorTimeline and additional fields on spSlot and spSlotData.
  • Added userData field to spTrackEntry, so users can expose data in spAnimationState callbacks.
  • Modified kvec.h used by SkeletonBinary.c to use Spine's MALLOC/FREE macros. That way there's only one place to inject custom allocators (extension.h) commit
  • Added macros to define typed dynamic arrays, see Array.h/.c
  • Added spClippingAttachment and respective enum.
  • Added spSkeletonClipper and spTriangulator, used to implement software clipping of attachments.
  • AnimationState#apply returns boolean indicating if any timeline was applied or not.
  • Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans
  • Added spVertexEffect and corresponding implementations spJitterVertexEffect and spSwirlVertexEffect. Create/dispose through the corresponding spXXXVertexEffect_create()/dispose() functions. Set on framework/engine specific renderer. See changes for spine-c based frameworks/engines below.
  • Functions in extension.h are not prefixed with _sp instead of just _ to avoid interference with other libraries.
  • Introduced SP_API macro. Every spine-c function is prefixed with this macro. By default, it is an empty string. Can be used to markup spine-c functions with e.g. __declspec` when compiling to a dll or linking to that dll.

Cocos2d-X

• Fixed renderer to work with 3.6 changes
• Optimized rendering by removing all per-frame allocation in SkeletonRenderer, resulting in 15% performance increase for large numbers of skeletons being rendered per frame.
• Added support for two color tinting. Tinting is enabled/disabled per SkeletonRenderer/SkeletonAnimation instance. Use SkeletonRenderer::setTwoColorTint(). Note that two color tinting requires the use of a non-standard shader and vertex format. This means that skeletons rendered with two color tinting will break batching. However, skeletons with two color tinting enabled and rendered after each other will be batched.
• Updated example to use Cocos2d-x 3.14.1.
• Added mesh debug rendering. Enable/Disable via SkeletonRenderer::setDebugMeshesEnabled().
• Added support for clipping.
• SkeletonRenderer now combines the displayed color of the Node (cascaded from all parents) with the skeleton color for tinting.
• Added support for vertex effects. See RaptorExample.cpp.
• Added ETC1 alpha support, thanks @halx99! Does not work when two color tint is enabled.
• Added spAtlasPage_setCustomTextureLoader() which let's you do texture loading manually. Thanks @jareguo.
• Added SkeletonRenderer:setSlotsRange() and SkeletonRenderer::createWithSkeleton(). This allows you to split rendering of a skeleton up into multiple parts, and render other nodes in between. See SkeletonRendererSeparatorExample.cpp for an example.

Cocos2d-Objc

• Fixed renderer to work with 3.6 changes
• Added support for two color tinting. Tinting is enabled/disabled per SkeletonRenderer/SkeletonAnimation.twoColorTint = true. Note that two color tinted skeletons do not batch with other nodes.
• Added support for clipping.

SFML

• Fixed renderer to work with 3.6 changes. Sadly, two color tinting does not work, as the vertex format in SFML is fixed.
• Added support for clipping.
• Added support for vertex effects. See raptor example.
• Added premultiplied alpha support to SkeletonDrawable.

Unreal Engine 4

• Fixed renderer to work with 3.6 changes
• Added new UPROPERTY to SpineSkeletonRendererComponent called Color. This allows to set the tint color of the skeleton in the editor, C++ and Blueprints. Under the hood, the spSkeleton->color will be set on every tick of the renderer component.
• Added support for clipping.
• Switched from built-in ProceduralMeshComponent to RuntimeMeshComponent by Koderz (https://github.com/Koderz/UE4RuntimeMeshComponent, MIT). Needed for more flexibility regarding vertex format, should not have an impact on existing code/assets. You need to copy the RuntimeMeshComponentPlugin from our repository in spine-ue4\Plugins\ to your project as well!
• Added support for two color tinting. All base materials, e.g. SpineUnlitNormalMaterial, now do proper two color tinting. No material parameters have changed.
• Updated to Unreal Engine 4.16.1. Note that 4.16 has a regression which will make it impossible to compile plain .c files!
• spine-c is now exposed from the plugin shared library on Windows via __declspec.

C

• Breaking changes

  • MeshAttachment.parentMesh is now a private field to enforce using the .ParentMesh setter property in external code. The MeshAttachment.ParentMesh property is an appropriate replacement wherever .parentMesh was used.
  • Skeleton.GetBounds takes a scratch array as input so it doesn't have to allocate a new array on each invocation itself. Reduces GC activity.
  • Removed Bone.WorldToLocalRotationX and Bone.WorldToLocalRotationY. Replaced by Bone.WorldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added stride parameter to VertexAttachment.ComputeWorldVertices.
  • Removed RegionAttachment.Vertices field. The vertices array is provided to RegionAttachment.ComputeWorldVertices by the API user now.
  • Removed RegionAttachment.UpdateWorldVertices, added RegionAttachment.ComputeWorldVertices. The new method now computes the x/y positions of the 4 vertices of the corner and places them in the provided worldVertices array, starting at offset, then moving by stride array elements when advancing to the next vertex. This allows to directly compose the vertex buffer and avoids a copy. The computation of the full vertices, including vertex colors and texture coordinates, is now done by the backend's respective renderer.
  • The completion event will fire for looped 0 duration animations every frame.

• Additions

• Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
• Added Bone.localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
• Added two color tinting support, including TwoColorTimeline and additional fields on Slot and SlotData.
• Added PointAttachment, additional method NewPointAttachment in AttachmentLoader interface.
• Added ClippingAttachment, additional method NewClippingAttachment in AttachmentLoader interface.
• Added SkeletonClipper and Triangulator, used to implement software clipping of attachments.
• AnimationState.Apply returns a bool indicating if any timeline was applied or not.
• Animation.Apply and Timeline.Apply` now take enums MixPoseandMixDirection instead of bools.

Unity

• Refactored renderer to work with new 3.6 features.
  • Two color tinting is currently supported via extra UV2 and UV3 mesh vertex streams. To use Two color tinting, you need to:
    • switch on "Tint Black" under "Advanced...",
    • use the new Spine/Skeleton Tint Black shader, or your own shader that treats the UV2 and UV3 streams similarly.
    • Additionally, for SkeletonGraphic, you can use Spine/SkeletonGraphic Tint Black (or the bundled SkeletonGraphicTintBlack material) or your own shader that uses UV2 and UV3 streams similarly. Additional Shader Channels TexCoord1 and TexCoord2 will need to be enabled from the Canvas component's inspector. These correspond to UV2 and UV3.
  • Clipping is now supported. Caution: The SkeletonAnimation switches to slightly slower mesh generation code when clipping so limit your use of ClippingAttachments when using on large numbers of skeletons.
• SkeletonRenderer.initialFlip Spine components such as SkeletonRenderer, SkeletonAnimation, SkeletonAnimator now has initialFlipX and initialFlipY fields which are also visible in the inspector under "Advanced...". It will allow you to set and preview a starting flip value for your skeleton component. This is applied immediately when the internal skeleton object is instantiated.
• [SpineAttribute] Improvements
  • Icons have been added to SpineAttributeDrawers. This should make your default inspectors easier to understand at a glance.
  • Added Constraint Attributes You can now use [SpineIkConstraint] [SpineTransformConstraint] [SpinePathConstraint]
  • SpineAttribute dataField parameter can also now detect sibling fields within arrays and serializable structs/classes.
  • [SpineAttribute(includeNone:false)] SpineAttributes now have an includeNone optional parameter to specify if you want to include or exclude a none ("") value option in the dropdown menu. Default is includeNone:true.
  • [SpineAttachment(skinField:"mySkin")] The SpineAttachment attribute now has a skinField optional parameter to limit the dropdown items to attachments in a specific skin instead of the just default skin or all the skins in SkeletonData.
• SkeletonDebugWindow. Debugging tools have been moved from the SkeletonAnimation and SkeletonUtility component inspectors into its own utility window. You can access "Skeleton Debug" under the Advanced... foldout in the SkeletonAnimation inspector, or in SkeletonAnimation's right-click/context menu.
  • Skeleton Baking Window The old Skeleton Baking feature is also now accessible through the SkeletonDataAsset's right-click/context menu.
• AttachmentTools source material. AttachmentTools methods can now accept a sourceMaterial argument to copy material properties from.
• AttachmentTools Skin Extensions. Using AttachmentTools, you can now add entries by slot name by also providing a skeleton argument. Also Append(Skin), RemoveAttachment and Clear have been added.
• BoneFollower and SkeletonUtilityBone Add RigidBody Button. The BoneFollower and SkeletonUtilityBone component inspectors will now offer to add a Rigidbody or Rigidbody2D if it detects a collider of the appropriate type. Having a rigidbody on a moving transform with a collider fits better with the Unity physics systems and prevents excess calculations. It will not detect colliders on child objects so you have to add Rigidbody components manually accordingly.
• SkeletonRenderer.OnPostProcessVertices is a new callback that gives you a reference to the MeshGenerator after it has generated a mesh from the current skeleton pose. You can access meshGenerator.VertexBuffer or meshGenerator.ColorBuffer to modify these before they get pushed into the UnityEngine.Mesh for rendering. This can be useful for non-shader vertex effects.
• Examples
  • Examples now use properties. The code in the example scripts have been switched over to using properties instead of fields to encourage their use for consistency. This is in anticipation of both users who want to move the Spine folders to the Unity Plugins folder (compiled as a different assembly), and of Unity 2017's ability to manually define different assemblies for shorter compilation times.
  • Mix And Match. The mix-and-match example scene, code and data have been updated to reflect the current recommended setup for animation-compatible custom equip systems The underlying API has changed since 3.5 and the new API calls in MixAndMatch.cs is recommended. Documentation is in progress.
  • Sample Components. AtasRegionAttacher and SpriteAttacher are now part of Sample Components, to reflect that they are meant to be used as sample code rather than production. A few other sample components have also been added. New imports of the unitypackage Examples folder will see a "Legacy" folder comprised of old sample components that no longer contain the most up-to-date and recommended workflows, but are kept in case old setups used them for production.
• Spine folder. In the unitypackage, the "spine-csharp" and "spine-unity" folders are now inside a "Spine" folder. This change will only affect fresh imports. Importing the unitypackage to update Spine-Unity in your existing project will update the appropriate files however you chose to arrange them, as long as the meta files are intact.
• Breaking changes
  • The Sprite shaders module was updated to the latest version from the source. Some changes were made to the underlying keyword structure. You may need to review the settings of your lit materials. Particularly, your Fixed Normals settings.
  • The Spine/Skeleton Lit shader was switched over to non-fixed-function code. It now no longer requires mesh normals and has fixed normals at the shader level.
  • The old MeshGenerator classes, interfaces and code in Spine.Unity.MeshGeneration are now deprecated. All mesh-generating components now share the class Spine.Unity.MeshGenerator defined in SpineMesh.cs. MeshGenerator is a serializable class.
    • The SkeletonRenderer.renderMeshes optimization is currently non-functional.
    • Old triangle-winding code has been removed from SkeletonRenderer. Please use shaders that have backface culling off.
    • Render settings in SkeletonGraphic can now be accessed under SkeletonGraphic.MeshGenerator.settings. This is visible in the SkeletonGraphic inspector as Advanced...
    • We will continue to bundle the unitypackage with the empty .cs files of deprecated classes until Spine 3.7 to ensure the upgrade process does not break.
  • The [SpineAttachment(slotField:)] optional parameter found property value now acts as a Find(slotName) argument rather than Contains(slotName).
  • SkeletonAnimator now uses a SkeletonAnimator.MecanimTranslator class to translate an Animator's Mecanim State Machine into skeleton poses. This makes code reuse possible for a Mecanim version of SkeletonGraphic.
  • SkeletonAnimator autoreset and the mixModes array are now a part of SkeletonAnimator's MecanimTranslator .Translator. autoReset is set to true by default. Old prefabs and scene objects with Skeleton Animator may no longer have correct values set.
  • Warnings and conditionals checking for specific Unity 5.2-and-below incompatibility have been removed.

XNA/MonoGame

• Added support for clipping
• Removed RegionBatcher and SkeletonRegionRenderer, renamed SkeletonMeshRenderer to SkeletonRenderer
• Added support for two color tint. For it to work, you need to add the SpineEffect.fx file to your content project, then load it via var effect = Content.Load<Effect>("SpineEffect");, and set it on the SkeletonRenderer. See the example project for code.
• Added support for any Effect to be used by SkeletonRenderer
• Added support for IVertexEffect to modify vertices of skeletons on the CPU. IVertexEffect instances can be set on the SkeletonRenderer. See example project.
• Added SkeletonDebugRenderer
• Made MeshBatcher of SkeletonRenderer accessible via a getter. Allows user to batch their own geometry together with skeleton meshes for maximum batching instead of using XNA SpriteBatcher.

Java

• Breaking changes

  • Skeleton.getBounds takes a scratch array as input so it doesn't have to allocate a new array on each invocation itself. Reduces GC activity.
  • Removed Bone.worldToLocalRotationX and Bone.worldToLocalRotationY. Replaced by Bone.worldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added stride parameter to VertexAttachment.computeWorldVertices.
  • Removed RegionAttachment.vertices field. The vertices array is provided to RegionAttachment.computeWorldVertices by the API user now.
  • Removed RegionAttachment.updateWorldVertices, added RegionAttachment.computeWorldVertices. The new method now computes the x/y positions of the 4 vertices of the corner and places them in the provided worldVertices array, starting at offset, then moving by stride array elements when advancing to the next vertex. This allows to directly compose the vertex buffer and avoids a copy. The computation of the full vertices, including vertex colors and texture coordinates, is now done by the backend's respective renderer.
  • Skeleton attachments: Moved update of attached skeleton out of libGDX SkeletonRenderer, added overloaded method Skeleton#updateWorldTransform(Bone), used forSkeletonAttachment. You now MUST call this new method with the bone of the parent skeleton to which the child skeleton is attached. SeeSkeletonAttachmentTest` for and example.
  • The completion event will fire for looped 0 duration animations every frame.

• Additions

  • Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
  • Added Bone.localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added two color tinting support, including TwoColorTimeline and additional fields on Slot and SlotData.
  • Added PointAttachment, additional method newPointAttachment in AttachmentLoader interface.
  • Added ClippingAttachment, additional method newClippingAttachment in AttachmentLoader interface.
  • Added SkeletonClipper and Triangulator, used to implement software clipping of attachments.
  • AnimationState#apply returns boolean indicating if any timeline was applied or not.
  • Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans

libGDX

• Fixed renderer to work with 3.6 changes
• Added support for two color tinting. Use the new TwoColorPolygonBatch together with SkeletonRenderer
• Added support for clipping. See SkeletonClipper. Used automatically by SkeletonRenderer. Does not work when using a SpriteBatch with SkeletonRenderer. Use PolygonSpriteBatch or TwoColorPolygonBatch instead.
• Added VertexEffect interface, instances of which can be set on SkeletonRenderer. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect and VertexEffectTest.

Lua

• Breaking changes
  • Removed Bone:worldToLocalRotationX and Bone:worldToLocalRotationY. Replaced by Bone:worldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • VertexAttachment:computeWorldVertices now takes offsets and stride to allow compositing vertices directly in a vertex buffer to be send to the GPU. The compositing is now performed in the backends' respective renderers. This also affects the subclasses MeshAttachment, BoundingBoxAttachment and PathAttachment.
  • Removed RegionAttachment:updateWorldVertices, added RegionAttachment:computeWorldVertices, which takes offsets and stride to allow compositing vertices directly in a vertex buffer to be send to the GPU. The compositing is now performed in the backends' respective renderers.
  • Removed MeshAttachment.worldVertices field. Computation is now performed in each backends' respective renderer. The uv coordinates are now stored in MeshAttachment.uvs.
  • Removed RegionAttachment.vertices field. Computation is now performed in each backends respective renderer. The uv coordinates for each vertex are now stored in the RegionAttachment.uvs field.
  • The completion event will fire for looped 0 duration animations every frame.
• Additions
• Added Bone:localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
• Added two color tinting support, including TwoColorTimeline and additional fields on Slot and SlotData.
• Added PointAttachment, additional method newPointAttachment in AttachmentLoader interface.
• Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
• Added ClippingAttachment, additional method newClippingAttachment in AttachmentLoader interface.
• Added SkeletonClipper and Triangulator, used to implement software clipping of attachments.
• AnimationState#apply returns boolean indicating if any timeline was applied or not.
• Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans
• Added JitterEffect and SwirlEffect and support for vertex effects in Corona and Love

Love2D

• Fixed renderer to work with 3.6 changes
• Added support for two color tinting. Enable it via SkeletonRenderer.new(true).
• Added clipping support.
• Added support for vertex effects. Set an implementation like "JitterEffect" on Skeleton.vertexEffect. See main.lua for an example.

Corona

• Fixed renderer to work with 3.6 changes. Sadly, two color tinting is not supported, as Corona doesn't let us change the vertex format needed and its doesn't allow to modify shaders in the way needed for two color tinting
• Added clipping support.
• Added support for vertex effects. Set an implementation like "JitterEffect" on SkeletonRenderer.vertexEffect. See main.lua for an example

Typescript/Javascript

• Breaking changes

  • Skeleton.getBounds takes a scratch array as input so it doesn't have to allocate a new array on each invocation itself. Reduces GC activity.
  • Removed Bone.worldToLocalRotationX and Bone.worldToLocalRotationY. Replaced by Bone.worldToLocalRotation (rotation given relative to x-axis, counter-clockwise, in degrees).
  • Removed VertexAttachment.computeWorldVertices overload, changed VertexAttachment.computeWorldVerticesWith to VertexAttachment.computeWorldVertices, added stride parameter.
  • Removed RegionAttachment.vertices field. The vertices array is provided to RegionAttachment.computeWorldVertices by the API user now.
  • Removed RegionAttachment.updateWorldVertices, added RegionAttachment.computeWorldVertices. The new method now computes the x/y positions of the 4 vertices of the corner and places them in the provided worldVertices array, starting at offset, then moving by stride array elements when advancing to the next vertex. This allows to directly compose the vertex buffer and avoids a copy. The computation of the full vertices, including vertex colors and texture coordinates, is now done by the backend's respective renderer.
  • The completion event will fire for looped 0 duration animations every frame.
  • Removed the Spine Widget in favor of Spine Web Player.

• Additions

  • Added support for local and relative transform constraint calculation, including additional fields in TransformConstraintData
  • Added Bone.localToWorldRotation(rotation given relative to x-axis, counter-clockwise, in degrees).
  • Added two color tinting support, including TwoColorTimeline and additional fields on Slot and SlotData.
  • Added PointAttachment, additional method newPointAttachment in AttachmentLoader interface.
  • Added ClippingAttachment, additional method newClippingAttachment in AttachmentLoader interface.
  • Added SkeletonClipper and Triangulator, used to implement software clipping of attachments.
  • AnimationState#apply returns boolean indicating if any timeline was applied or not.
  • Animation#apply and Timeline#apply` now take enums MixPoseandMixDirection instead of booleans
  • Added AssetManager.loadTextureAtlas. Instead of loading the .atlas and corresponding image files manually, you can simply specify the location of the .atlas file and AssetManager will load the atlas and all its images automatically. AssetManager.get("atlasname.atlas") will then return an instance of spine.TextureAtlas.
  • Added the Spine Web Player

WebGL backend

• Fixed WebGL context loss
  • Added Restorable interface, implemented by any WebGL resource that needs restoration after a context loss. All WebGL resource classes (Shader, Mesh, GLTexture) implement this interface.
  • Added ManagedWebGLRenderingContext. Handles setup of a WebGLRenderingContext given a canvas element and restoration of WebGL resources (Shader, Mesh, GLTexture) on WebGL context loss. WebGL resources register themselves with the ManagedWebGLRenderingContext. If the context is informed of a context loss and restoration, the registered WebGL resources' restore() method is called. The restore() method implementation on each resource type will recreate the GPU side objects.
  • All classes that previously took a WebGLRenderingContext in the constructor now also allow a ManagedWebGLRenderingContext. This ensures existing applications do not break.
  • To use automatic context restauration:
  • Create or fetch a canvas element from the DOM
  • Instantiate a ManagedWebGLRenderingContext, passing the canvas to the constructor. This will setup a WebGLRenderingContext internally and manage context loss/restoration.
  • Pass the ManagedWebGLRenderingContext to the constructors of classes that you previously passed a WebGLRenderingContext to (AssetManager, GLTexture, Mesh, Shader, PolygonBatcher, SceneRenderer, ShapeRenderer, SkeletonRenderer, SkeletonDebugRenderer).
• Fixed renderer to work with 3.6 changes.
• Added support for two color tinting.
• Improved performance by using DYNAMIC_DRAW for vertex buffer objects and fixing bug that copied to much data to the GPU each frame in PolygonBatcher/Mesh.
• Added two color tinting support, enabled by default. You can disable it via the constructors of SceneRenderer, SkeletonRendererand PolygonBatcher. Note that you will need to use a shader created via Shader.newTwoColoredTexturedShader shader with SkeletonRenderer and PolygonBatcher if two color tinting is enabled.
• Added clipping support
• Added VertexEffect interface, instances of which can be set on SkeletonRenderer. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect, and the example which allows to set effects.
• Added slotRangeStart and slotRangeEnd parameters to SkeletonRenderer#draw and SceneRenderer#drawSkeleton. This allows you to render only a range of slots in the draw order. See spine-ts/webgl/tests/test-slot-range.html for an example.

Canvas backend

• Fixed renderer to work for 3.6 changes. Sadly, we can't support two color tinting via the Canvas API.
• Added support for shearing and non-uniform scaling inherited from parent bones.
• Added support for alpha tinting.

Three.js backend

• Fixed renderer to work with 3.6 changes. Two color tinting is not supported.
• Added clipping support
• Added VertexEffect interface, instances of which can be set on SkeletonMesh. Allows to modify vertices before submitting them to GPU. See SwirlEffect, JitterEffect.
• Added support for multi-page atlases

Widget backend

• Fixed WebGL context loss (see WebGL backend changes). Enabled automatically.
• Fixed renderer to work for 3.6 changes. Supports two color tinting & clipping (see WebGL backend changes for details).
• Added fields atlasContent, atlasPagesContent, and jsonContent to WidgetConfiguration allowing you to directly pass the contents of the .atlas, atlas page .png files, and the .json file without having to do a request. See README.md and the example for details.
• SpineWidget.setAnimation() now takes an additional optional parameter for callbacks when animations are completed/interrupted/etc.