The Spine Runtimes are available for many programming languages. To simplify documentation, the API reference below is programming language agnostic. There may be minor differences for some languages, such as start caps for spine-csharp and class name prefixes on methods for spine-c.
Parameters cannot be null unless explicitly mentioned. Returns values will not be null unless explicitly mentioned.
This documentation is for the latest non-beta Spine Runtimes. Documentation for the latest beta Spine Runtimes is also available.
This diagram illustrates how the various pieces of the runtimes fit together. Click for full resolution.
The instance data is created for each skeleton instance and stores the skeleton's pose and other state. The setup pose data is stateless and shared across skeleton instances. It contains the setup pose, attachments, and animations.
Stores a list of timelines to animate a skeleton's pose over time.
Animation Properties
duration: float
The duration of the animation in seconds, which is usually the highest time of all frames in the timeline. The duration is used to know when it has completed and when it should loop back to the start.
name: string readonly
The animation's name, which is unique across all animations in the skeleton.
timelines: list<Timeline>
If the returned array or the timelines it contains are modified, timelines must be called.
Animation Methods
apply (Skeleton skeleton, float lastTime, float time, bool loop, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void
Applies the animation's timelines to the specified skeleton.
See Timeline apply.
  • skeleton The skeleton the animation is being applied to. This provides access to the bones, slots, and other skeleton components the timelines may change.
  • lastTime The last time in seconds this animation was applied. Some timelines trigger only at specific times rather than every frame. Pass -1 the first time an animation is applied to ensure frame 0 is triggered.
  • time The time in seconds the skeleton is being posed for. Most timelines find the frame before and the frame after this time and interpolate between the frame values. If beyond the duration and loop is true then the animation will repeat, else the last frame will be applied.
  • loop If true, the animation repeats after the duration.
  • events If any events are fired, they are added to this list. Can be null to ignore fired events or if no timelines fire events.
  • alpha 0 applies the current or setup values (depending on blend). 1 applies the timeline values. Between 0 and 1 applies values between the current or setup values and the timeline values. By adjusting alpha over time, an animation can be mixed in or out. alpha can also be useful to apply animations on top of each other (layering).
  • blend Controls how mixing is applied when alpha < 1.
  • direction Indicates whether the timelines are mixing in or out. Used by timelines which perform instant transitions, such as DrawOrderTimeline or AttachmentTimeline.
hasTimeline (string[] propertyIds): bool
Returns true if this animation contains a timeline with any of the specified property IDs.
The base class for all timelines.
Timeline Properties
duration: float readonly
frameCount: int readonly
The number of frames for this timeline.
frameEntries: int readonly
The number of entries stored per frame.
frames: float[] readonly
The time in seconds and any other values for each frame.
propertyIds: string[] readonly
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
Timeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void
Applies this timeline to the skeleton.
  • skeleton The skeleton to which the timeline is being applied. This provides access to the bones, slots, and other skeleton components that the timeline may change.
  • lastTime The last time in seconds this timeline was applied. Timelines such as EventTimeline trigger only at specific times rather than every frame. In that case, the timeline triggers everything between lastTime (exclusive) and time (inclusive). Pass -1 the first time an animation is applied to ensure frame 0 is triggered.
  • time The time in seconds that the skeleton is being posed for. Most timelines find the frame before and the frame after this time and interpolate between the frame values. If beyond the last frame, the last frame will be applied.
  • events If any events are fired, they are added to this list. Can be null to ignore fired events or if the timeline does not fire events.
  • alpha 0 applies the current or setup value (depending on blend). 1 applies the timeline value. Between 0 and 1 applies a value between the current or setup value and the timeline value. By adjusting alpha over time, an animation can be mixed in or out. alpha can also be useful to apply animations on top of each other (layering).
  • blend Controls how mixing is applied when alpha < 1.
  • direction Indicates whether the timeline is mixing in or out. Used by timelines which perform instant transitions, such as DrawOrderTimeline or AttachmentTimeline, and others such as ScaleTimeline.
Changes the alpha for a slot's color.
AlphaTimeline Properties
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
AlphaTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a slot's attachment.
AttachmentTimeline Properties
attachmentNames: string[] readonly
The attachment name for each frame. May contain null values to clear the attachment.
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
AttachmentTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
setFrame (int frame, float time, string attachmentName): void
Sets the time and attachment name for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
An interface for timelines which change the property of a bone.
BoneTimeline Properties
boneIndex: int readonly
The index of the bone in bones that will be changed when this timeline is applied.
The base class for timelines that interpolate between frame values using stepped, linear, or a Bezier curve.
CurveTimeline Properties
LINEAR = 0: int static, readonly
STEPPED = 1: int static, readonly
BEZIER = 2: int static, readonly
BEZIER_SIZE = 18: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
CurveTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
  • bezier The ordinal of this Bezier curve for this timeline, between 0 and bezierCount - 1 (specified in the constructor), inclusive.
  • frame Between 0 and frameCount - 1, inclusive.
  • value The index of the value for the frame this curve is used for.
  • time1 The time for the first key.
  • value1 The value for the first key.
  • cx1 The time for the first Bezier handle.
  • cy1 The value for the first Bezier handle.
  • cx2 The time of the second Bezier handle.
  • cy2 The value for the second Bezier handle.
  • time2 The time for the second key.
  • value2 The value for the second key.
setLinear (int frame): void
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
The base class for a CurveTimeline that sets one property.
CurveTimeline1 Properties
ENTRIES = 2: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
CurveTimeline1 Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
The base class for a CurveTimeline which sets two properties.
CurveTimeline2 Properties
ENTRIES = 3: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
CurveTimeline2 Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value1, float value2): void
Sets the time and values for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a slot's deform to deform a VertexAttachment.
DeformTimeline Properties
attachment: VertexAttachment readonly
The attachment that will be deformed.
See deformAttachment.
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
vertices: float[][] readonly
The vertices for each frame.
DeformTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float[] vertices): void
Sets the time and vertices for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
  • vertices Vertex positions for an unweighted VertexAttachment, or deform offsets if it has weights.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a skeleton's drawOrder.
DrawOrderTimeline Properties
drawOrders: int[][] readonly
The draw order for each frame. See setFrame.
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
DrawOrderTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
setFrame (int frame, float time, int[] drawOrder): void
Sets the time and draw order for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
  • drawOrder For each slot in slots, the index of the slot in the new draw order. May be null to use setup pose draw order.
Fires an Event when specific animation times are reached.
EventTimeline Properties
duration: float readonly, from Timeline
events: Event[] readonly
The event for each frame.
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
EventTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Fires events for frames > lastTime and <= time.
See Timeline apply.
setFrame (int frame, Event event): void
Sets the time and event for the specified frame.
  • frame Between 0 and frameCount, inclusive.
Changes an IK constraint's mix, softness, bendDirection, stretch, and compress.
IkConstraintTimeline Properties
ENTRIES = 6: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
ikConstraintIndex: int readonly
The index of the IK constraint slot in ikConstraints that will be changed when this timeline is applied.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
IkConstraintTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float mix, float softness, int bendDirection, bool compress, bool stretch): void
Sets the time, mix, softness, bend direction, compress, and stretch for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
  • bendDirection 1 or -1.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a transform constraint's mixRotate, mixX, and mixY.
PathConstraintMixTimeline Properties
ENTRIES = 4: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
pathConstraintIndex: int readonly
The index of the path constraint slot in pathConstraints that will be changed when this timeline is applied.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
PathConstraintMixTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float mixRotate, float mixX, float mixY): void
Sets the time and color for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a path constraint's position.
PathConstraintPositionTimeline Properties
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
pathConstraintIndex: int readonly
The index of the path constraint slot in pathConstraints that will be changed when this timeline is applied.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
PathConstraintPositionTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a path constraint's spacing.
PathConstraintSpacingTimeline Properties
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
pathConstraintIndex: int readonly
The index of the path constraint slot in pathConstraints that will be changed when this timeline is applied.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
PathConstraintSpacingTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a slot's color.
RGBATimeline Properties
ENTRIES = 5: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
RGBATimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float r, float g, float b, float a): void
Sets the time and color for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a slot's color and darkColor for two color tinting.
RGBA2Timeline Properties
ENTRIES = 8: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
The index of the slot in slots that will be changed when this timeline is applied. The darkColor must not be null.
RGBA2Timeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float r, float g, float b, float a, float r2, float g2, float b2): void
Sets the time, light color, and dark color for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes the RGB for a slot's color.
RGBTimeline Properties
ENTRIES = 4: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
RGBTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float r, float g, float b): void
Sets the time and color for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes the RGB for a slot's color and darkColor for two color tinting.
RGB2Timeline Properties
ENTRIES = 7: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
slotIndex: int readonly
The index of the slot in slots that will be changed when this timeline is applied. The darkColor must not be null.
RGB2Timeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float r, float g, float b, float r2, float g2, float b2): void
Sets the time, light color, and dark color for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local rotation.
RotateTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
RotateTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local scaleX and scaleY.
ScaleTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ScaleTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value1, float value2): void from CurveTimeline2
Sets the time and values for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local scaleX.
ScaleXTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ScaleXTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local scaleY.
ScaleYTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ScaleYTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local shearX and shearY.
ShearTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ShearTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value1, float value2): void from CurveTimeline2
Sets the time and values for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local shearX.
ShearXTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ShearXTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local shearY.
ShearYTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
ShearYTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
An interface for timelines which change the property of a slot.
SlotTimeline Properties
slotIndex: int readonly
The index of the slot in slots that will be changed when this timeline is applied.
Changes a transform constraint's mixRotate, mixX, mixY, mixScaleX, mixScaleY, and mixShearY.
TransformConstraintTimeline Properties
ENTRIES = 7: int static, readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
transformConstraintIndex: int readonly
The index of the transform constraint slot in transformConstraints that will be changed when this timeline is applied.
TransformConstraintTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float mixRotate, float mixX, float mixY, float mixScaleX, float mixScaleY, float mixShearY): void
Sets the time, rotate mix, translate mix, scale mix, and shear mix for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local x and y.
TranslateTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
TranslateTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value1, float value2): void from CurveTimeline2
Sets the time and values for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local x.
TranslateXTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
TranslateXTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Changes a bone's local y.
TranslateYTimeline Properties
boneIndex: int readonly
duration: float readonly, from Timeline
frameCount: int readonly, from Timeline
The number of frames for this timeline.
frameEntries: int readonly, from Timeline
The number of entries stored per frame.
frames: float[] readonly, from Timeline
The time in seconds and any other values for each frame.
propertyIds: string[] readonly, from Timeline
Uniquely encodes both the type of this timeline and the skeleton properties that it affects.
TranslateYTimeline Methods
apply (Skeleton skeleton, float lastTime, float time, list<Event> events, float alpha, MixBlend blend, MixDirection direction): void from Timeline
Applies this timeline to the skeleton.
See Timeline apply.
getBezierValue (float time, int frameIndex, int valueOffset, int i): float from CurveTimeline
Returns the Bezier interpolated value for the specified time.
  • frameIndex The index into frames for the values of the frame before time.
  • valueOffset The offset from frameIndex to the value this curve is used for.
  • i The index of the Bezier segments. See getCurveType.
getCurveType (int frame): int from CurveTimeline
Returns the interpolation type for the specified frame.
  • frame Between 0 and frameCount - 1, inclusive.
  • <return> LINEAR, STEPPED, or BEZIER + the index of the Bezier segments.
getCurveValue (float time): float from CurveTimeline1
Returns the interpolated value for the specified time.
setBezier (int bezier, int frame, int value, float time1, float value1, float cx1, float cy1, float cx2, float cy2, float time2, float value2): void from CurveTimeline
Stores the segments for the specified Bezier curve. For timelines that modify multiple values, there may be more than one curve per frame.
See CurveTimeline setBezier.
setFrame (int frame, float time, float value): void from CurveTimeline1
Sets the time and value for the specified frame.
  • frame Between 0 and frameCount, inclusive.
  • time The frame time in seconds.
setLinear (int frame): void from CurveTimeline
Sets the specified frame to linear interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
setStepped (int frame): void from CurveTimeline
Sets the specified frame to stepped interpolation.
  • frame Between 0 and frameCount - 1, inclusive.
shrink (int bezierCount): void from CurveTimeline
Shrinks the storage for Bezier curves, for use when bezierCount (specified in the constructor) was larger than the actual number of Bezier curves.
Controls how timeline values are mixed with setup pose values or current pose values when a timeline is applied with alpha < 1.
See Timeline apply.
MixBlend Values
setup
Transitions from the setup value to the timeline value (the current value is not used). Before the first frame, the setup value is set.
first
Transitions from the current value to the timeline value. Before the first frame, transitions from the current value to the setup value. Timelines which perform instant transitions, such as DrawOrderTimeline or AttachmentTimeline, use the setup value before the first frame.
first is intended for the first animations applied, not for animations layered on top of those.
replace
Transitions from the current value to the timeline value. No change is made before the first frame (the current value is kept until the first frame).
replace is intended for animations layered on top of others, not for the first animations applied.
add
Transitions from the current value to the current value plus the timeline value. No change is made before the first frame (the current value is kept until the first frame).
add is intended for animations layered on top of others, not for the first animations applied. Properties set by additive animations must be set manually or by another animation before applying the additive animations, else the property values will increase each time the additive animations are applied.
Indicates whether a timeline's alpha is mixing out over time toward 0 (the setup or current pose value) or mixing in toward 1 (the timeline's value). Some timelines use this to decide how values are applied.
See Timeline apply.
MixDirection Values
in
out
Applies animations over time, queues animations for later playback, mixes (crossfading) between animations, and applies multiple animations on top of each other (layering).
See Applying Animations in the Spine Runtimes Guide.
AnimationState Properties
data: AnimationStateData
The AnimationStateData to look up mix durations.
timeScale: float
Multiplier for the delta time when the animation state is updated, causing time for all animations and mixes to play slower or faster. Defaults to 1.
See TrackEntry timeScale for affecting a single animation.
tracks: list<TrackEntry> readonly
The list of tracks that have had animations, which may contain null entries for tracks that currently have no animation.
AnimationState Methods
addAnimation (int trackIndex, string animationName, bool loop, float delay): TrackEntry
Queues an animation by name.
See addAnimation.
addAnimation (int trackIndex, Animation animation, bool loop, float delay): TrackEntry
Adds an animation to be played after the current or last queued animation for a track. If the track is empty, it is equivalent to calling setAnimation.
  • delay If > 0, sets delay. If <= 0, the delay set is the duration of the previous track entry minus any mix duration (from the AnimationStateData) plus the specified delay (ie the mix ends at (delay = 0) or before (delay < 0) the previous track entry duration). If the previous entry is looping, its next loop completion is used instead of its duration.
  • <return> A track entry to allow further customization of animation playback. References to the track entry must not be kept after the dispose event occurs.
addEmptyAnimation (int trackIndex, float mixDuration, float delay): TrackEntry
Adds an empty animation to be played after the current or last queued animation for a track, and sets the track entry's mixDuration. If the track is empty, it is equivalent to calling setEmptyAnimation.
See setEmptyAnimation.
  • delay If > 0, sets delay. If <= 0, the delay set is the duration of the previous track entry minus any mix duration plus the specified delay (ie the mix ends at (delay = 0) or before (delay < 0) the previous track entry duration). If the previous entry is looping, its next loop completion is used instead of its duration.
  • <return> A track entry to allow further customization of animation playback. References to the track entry must not be kept after the dispose event occurs.
addListener (AnimationStateListener listener): void
Adds a listener to receive events for all track entries.
apply (Skeleton skeleton): bool
Poses the skeleton using the track entry animations. The animation state is not changed, so can be applied to multiple skeletons to pose them identically.
  • <return> True if any animations were applied.
clearListenerNotifications (): void
Discards all listener notifications that have not yet been delivered. This can be useful to call from an AnimationStateListener when it is known that further notifications that may have been already queued for delivery are not wanted because new animations are being set.
clearListeners (): void
Removes all listeners added with addListener.
clearNext (TrackEntry entry): void
Removes the next and all entries after it for the specified entry.
clearTrack (int trackIndex): void
Removes all animations from the track, leaving skeletons in their current pose.
It may be desired to use setEmptyAnimation to mix the skeletons back to the setup pose, rather than leaving them in their current pose.
clearTracks (): void
Removes all animations from all tracks, leaving skeletons in their current pose.
It may be desired to use setEmptyAnimations to mix the skeletons back to the setup pose, rather than leaving them in their current pose.
getCurrent (int trackIndex): TrackEntry
Returns the track entry for the animation currently playing on the track, or null if no animation is currently playing.
  • <return> May be null.
removeListener (AnimationStateListener listener): void
Removes the listener added with addListener.
setAnimation (int trackIndex, string animationName, bool loop): TrackEntry
Sets an animation by name.
See setAnimation.
setAnimation (int trackIndex, Animation animation, bool loop): TrackEntry
Sets the current animation for a track, discarding any queued animations. If the formerly current track entry was never applied to a skeleton, it is replaced (not mixed from).
  • loop If true, the animation will repeat. If false it will not, instead its last frame is applied if played beyond its duration. In either case trackEnd determines when the track is cleared.
  • <return> A track entry to allow further customization of animation playback. References to the track entry must not be kept after the dispose event occurs.
setEmptyAnimation (int trackIndex, float mixDuration): TrackEntry
Sets an empty animation for a track, discarding any queued animations, and sets the track entry's mixDuration. An empty animation has no timelines and serves as a placeholder for mixing in or out.
Mixing out is done by setting an empty animation with a mix duration using either setEmptyAnimation, setEmptyAnimations, or addEmptyAnimation. Mixing to an empty animation causes the previous animation to be applied less and less over the mix duration. Properties keyed in the previous animation transition to the value from lower tracks or to the setup pose value if no lower tracks key the property. A mix duration of 0 still mixes out over one frame.
Mixing in is done by first setting an empty animation, then adding an animation using addAnimation with the desired delay (an empty animation has a duration of 0) and on the returned track entry, set the mixDuration. Mixing from an empty animation causes the new animation to be applied more and more over the mix duration. Properties keyed in the new animation transition from the value from lower tracks or from the setup pose value if no lower tracks key the property to the value keyed in the new animation.
setEmptyAnimations (float mixDuration): void
Sets an empty animation for every track, discarding any queued animations, and mixes to it over the specified mix duration.
update (float delta): void
Increments each track entry trackTime, setting queued animations as current if needed.
Stores mix (crossfade) durations to be applied when AnimationState animations are changed.
AnimationStateData Properties
defaultMix: float
The mix duration to use when no mix duration has been defined between two animations.
skeletonData: SkeletonData readonly
The SkeletonData to look up animations when they are specified by name.
AnimationStateData Methods
getMix (Animation from, Animation to): float
Returns the mix duration to use when changing from the specified animation to the other, or the defaultMix if no mix duration has been set.
setMix (Animation from, Animation to, float duration): void
Sets the mix duration when changing from the specified animation to the other.
See mixDuration.
setMix (string fromName, string toName, float duration): void
Sets a mix duration by animation name.
See setMix.
The interface to implement for receiving TrackEntry events. It is always safe to call AnimationState methods when receiving events.
See TrackEntry listener and AnimationState addListener.
AnimationStateListener Methods
complete (TrackEntry entry): void
Invoked every time this entry's animation completes a loop. This may occur during mixing (after interrupt).
If this entry's mixingTo is not null, this entry is mixing out (it is not the current entry).
Because this event is triggered at the end of apply, any animations set in response to the event won't be applied until the next time the AnimationState is applied.
dispose (TrackEntry entry): void
Invoked when this entry will be disposed. This may occur without the entry ever being set as the current entry.
References to the entry should not be kept after dispose is called, as it may be destroyed or reused.
end (TrackEntry entry): void
Invoked when this entry will never be applied again. This only occurs if this entry has previously been set as the current entry (start was invoked).
event (TrackEntry entry, Event event): void
Invoked when this entry's animation triggers an event. This may occur during mixing (after interrupt), see eventThreshold.
Because this event is triggered at the end of apply, any animations set in response to the event won't be applied until the next time the AnimationState is applied.
interrupt (TrackEntry entry): void
Invoked when another entry has replaced this entry as the current entry. This entry may continue being applied for mixing.
start (TrackEntry entry): void
Invoked when this entry has been set as the current entry. end will occur when this entry will no longer be applied.
Stores settings and other state for the playback of an animation on an AnimationState track.
References to a track entry must not be kept after the dispose event occurs.
TrackEntry Properties
alpha: float
Values < 1 mix this animation with the skeleton's current pose (usually the pose resulting from lower tracks). Defaults to 1, which overwrites the skeleton's current pose with this animation.
Typically track 0 is used to completely pose the skeleton, then alpha is used on higher tracks. It doesn't make sense to use alpha on track 0 if the skeleton pose is from the last frame render.
animation: Animation
The animation to apply for this track entry.
animationEnd: float
Seconds for the last frame of this animation. Non-looping animations won't play past this time. Looping animations will loop back to animationStart at this time. Defaults to the animation duration.
animationLast: float
The time in seconds this animation was last applied. Some timelines use this for one-time triggers. Eg, when this animation is applied, event timelines will fire all events between the animationLast time (exclusive) and animationTime (inclusive). Defaults to -1 to ensure triggers on frame 0 happen the first time this animation is applied.
animationStart: float
Seconds when this animation starts, both initially and after looping. Defaults to 0.
When changing the animationStart time, it often makes sense to set animationLast to the same value to prevent timeline keys before the start time from triggering.
animationTime: float readonly
Uses trackTime to compute the animationTime, which is between animationStart and animationEnd. When the trackTime is 0, the animationTime is equal to the animationStart time.
attachmentThreshold: float
When the mix percentage (mixTime / mixDuration) is less than the attachmentThreshold, attachment timelines are applied while this animation is being mixed out. Defaults to 0, so attachment timelines are not applied while this animation is being mixed out.
delay: float
Seconds to postpone playing the animation. When this track entry is the current track entry, delay postpones incrementing the trackTime. When this track entry is queued, delay is the time from the start of the previous animation to when this track entry will become the current track entry (ie when the previous track entry trackTime >= this track entry's delay).
timeScale affects the delay.
When using addAnimation with a delay <= 0, the delay is set using the mix duration from the AnimationStateData. If mixDuration is set afterward, the delay may need to be adjusted.
drawOrderThreshold: float
When the mix percentage (mixTime / mixDuration) is less than the drawOrderThreshold, draw order timelines are applied while this animation is being mixed out. Defaults to 0, so draw order timelines are not applied while this animation is being mixed out.
eventThreshold: float
When the mix percentage (mixTime / mixDuration) is less than the eventThreshold, event timelines are applied while this animation is being mixed out. Defaults to 0, so event timelines are not applied while this animation is being mixed out.
holdPrevious: bool
If true, when mixing from the previous animation to this animation, the previous animation is applied as normal instead of being mixed out.
When mixing between animations that key the same property, if a lower track also keys that property then the value will briefly dip toward the lower track value during the mix. This happens because the first animation mixes from 100% to 0% while the second animation mixes from 0% to 100%. Setting holdPrevious to true applies the first animation at 100% during the mix so the lower track value is overwritten. Such dipping does not occur on the lowest track which keys the property, only when a higher track also keys the property.
Snapping will occur if holdPrevious is true and this animation does not key all the same properties as the previous animation.
listener: AnimationStateListener
The listener for events generated by this track entry, or null.
A track entry returned from setAnimation is already the current animation for the track, so the track entry listener start will not be called.
loop: bool
If true, the animation will repeat. If false it will not, instead its last frame is applied if played beyond its duration.
mixBlend: MixBlend
Controls how properties keyed in the animation are mixed with lower tracks. Defaults to replace.
Track entries on track 0 ignore this setting and always use first.
The mixBlend can be set for a new track entry only before apply is first called.
mixDuration: float
Seconds for mixing from the previous animation to this animation. Defaults to the value provided by AnimationStateData getMix based on the animation before this animation (if any).
A mix duration of 0 still mixes out over one frame to provide the track entry being mixed out a chance to revert the properties it was animating.
The mixDuration can be set manually rather than use the value from getMix. In that case, the mixDuration can be set for a new track entry only before update is first called.
When using addAnimation with a delay <= 0, the delay is set using the mix duration from the AnimationStateData. If mixDuration is set afterward, the delay may need to be adjusted. For example: entry.delay = entry.previous.getTrackComplete() - entry.mixDuration;
mixTime: float
Seconds from 0 to the mixDuration when mixing from the previous animation to this animation. May be slightly more than mixDuration when the mix is complete.
mixingFrom: TrackEntry readonly
The track entry for the previous animation when mixing from the previous animation to this animation, or null if no mixing is currently occuring. When mixing from multiple animations, mixingFrom makes up a linked list.
mixingTo: TrackEntry readonly
The track entry for the next animation when mixing from this animation to the next animation, or null if no mixing is currently occuring. When mixing to multiple animations, mixingTo makes up a linked list.
next: TrackEntry readonly
The animation queued to start after this animation, or null if there is none. next makes up a doubly linked list.
See clearNext to truncate the list.
previous: TrackEntry readonly
The animation queued to play before this animation, or null. previous makes up a doubly linked list.
reverse: bool
If true, the animation will be applied in reverse. Events are not fired when an animation is applied in reverse.
timeScale: float
Multiplier for the delta time when this track entry is updated, causing time for this animation to pass slower or faster. Defaults to 1.
Values < 0 are not supported. To play an animation in reverse, use reverse.
mixTime is not affected by track entry time scale, so mixDuration may need to be adjusted to match the animation speed.
When using addAnimation with a delay <= 0, the delay is set using the mix duration from the AnimationStateData, assuming time scale to be 1. If the time scale is not 1, the delay may need to be adjusted.
See AnimationState timeScale for affecting all animations.
trackComplete: float readonly
If this track entry is non-looping, the track time in seconds when animationEnd is reached, or the current trackTime if it has already been reached. If this track entry is looping, the track time when this animation will reach its next animationEnd (the next loop completion).
trackEnd: float
The track time in seconds when this animation will be removed from the track. Defaults to the highest possible float value, meaning the animation will be applied until a new animation is set or the track is cleared. If the track end time is reached, no other animations are queued for playback, and mixing from any previous animations is complete, then the properties keyed by the animation are set to the setup pose and the track is cleared.
It may be desired to use addEmptyAnimation rather than have the animation abruptly cease being applied.
trackIndex: int readonly
The index of the track where this track entry is either current or queued.
See getCurrent.
trackTime: float
Current time in seconds this track entry has been the current track entry. The track time determines animationTime. The track time can be set to start the animation at a time other than 0, without affecting looping.
TrackEntry Methods
isComplete (): bool
Returns true if at least one loop has been completed.
See complete.
isEmptyAnimation (): bool
Returns true if this entry is for the empty animation. See setEmptyAnimation, addEmptyAnimation, and setEmptyAnimations.
resetRotationDirections (): void
Resets the rotation directions for mixing this entry's rotate timelines. This can be useful to avoid bones rotating the long way around when using alpha and starting animations on other tracks.
Mixing with replace involves finding a rotation between two others, which has two possible solutions: the short way or the long way around. The two rotations likely change over time, so which direction is the short or long way also changes. If the short way was always chosen, bones would flip to the other side when that direction became the long way. TrackEntry chooses the short way the first time it is applied and remembers that direction.
Stores information about texture regions in one or more texture pages.
Creating an atlas takes the atlas data file and a TextureLoader.
Atlas Properties
pages: list<AtlasPage>
An atlas page for each texture.
regions: list<AtlasRegion>
The atlas regions across all pages.
Atlas Methods
dispose (): void
Uses the TextureLoader to unload each AtlasPage rendererObject.
findRegion (string name): AtlasRegion
Returns the first region found with the specified name, or null if it was not found. String comparison is used to find the region so the result should be cached rather than calling this method multiple times.
Settings for an atlas backing texture.
AtlasPage Properties
format: Format
The memory format to use for the texture.
height: int
The height in pixels of the image file.
magFilter: TextureFilter
The texture's magnification filter.
minFilter: TextureFilter
The texture's minification filter.
name: string
The name of the image file for the texture.
rendererObject: object
A game toolkit specific object used by rendering code, usually set by a TextureLoader.
See Loading skeleton data.
uWrap: TextureWrap
The X axis texture wrap setting.
vWrap: TextureWrap
The Y axis texture wrap setting.
width: int
The width in pixels of the image file.
A texture region on an atlas page.
AtlasRegion Properties
height: int
The height in pixels of the unrotated texture region after whitepace stripping.
index: int
The number at the end of the original image file name, or -1 if none.
When sprites are packed, if the original file name ends with a number, it is stored as the index and is not considered as part of the region's name. This is useful for keeping animation frames in order.
name: string
The name of the region.
offsetX: float
Pixels stripped from the left of the unrotated texture region.
offsetY: float
Pixels stripped from the bottom of the unrotated texture region.
originalHeight: int
The height in pixels of the unrotated texture region before whitespace stripping.
originalWidth: int
The width in pixels of the unrotated texture region before whitespace stripping.
pads: int[]
The ninepatch padding, or null if not a ninepatch or the ninepatch has no padding. Has 4 entries: left, right, top, bottom.
page: AtlasPage
The atlas page this region belongs to.
rotate: bool
If true, the texture region is stored in the atlas rotated 90 degrees counterclockwise.
splits: int[]
The ninepatch splits, or null if not a ninepatch. Has 4 entries: left, right, top, bottom.
u: float
The normalized (0-1) texture coordinate of the left edge of the texture region.
u2: float
The normalized (0-1) texture coordinate of the right edge of the texture region.
v: float
The normalized (0-1) texture coordinate of the top edge of the texture region.
v2: float
The normalized (0-1) texture coordinate of the bottom edge of the texture region.
width: int
The width in pixels of the unrotated texture region after whitespace stripping.
x: int
Pixels from the left edge of the texture to the left edge of the texture region.
y: int
Pixels from the bottom edge of the texture to the bottom edge of the texture region.
The memory format to use when loading an image into the AtlasPage texture.
Format Values
Alpha
Intensity
LuminanceAlpha
RGB565
RGBA4444
RGB888
RGBA8888
The filtering for magnification or minification of the AtlasPage texture.
TextureFilter Values
Nearest
Linear
MipMap
MipMapNearestNearest
MipMapLinearNearest
MipMapNearestLinear
MipMapLinearLinear
The interface which can be implemented to customize loading of AtlasPage images for an Atlas.
See Loading skeleton data.
TextureLoader Methods
load (AtlasPage page, string path): void
Loads a texture using the AtlasPage name or the image at the specified path and sets the AtlasPage rendererObject.
unload (object rendererObject): void
Unloads the rendererObject previously loaded in load.
The texture wrapping mode for UVs outside the AtlasPage texture.
TextureWrap Values
MirroredRepeat
ClampToEdge
Repeat
The base class for all attachments.
Attachment Properties
name: string readonly
The attachment's name.
Attachment Methods
copy (): Attachment
Returns a copy of the attachment.
An attachment with vertices that make up a polygon. Can be used for hit detection, creating physics bodies, spawning particle effects, and more.
See SkeletonBounds and Bounding Boxes in the Spine User Guide.
BoundingBoxAttachment Properties
bones: int[] from VertexAttachment
The bones which affect the vertices. The array entries are, for each vertex, the number of bones affecting the vertex followed by that many bone indices, which is the index of the bone in bones. Will be null if this attachment has no weights.
color: Color
The color of the bounding box as it was in Spine, or a default color if nonessential data was not exported. Bounding boxes are not usually rendered at runtime.
deformAttachment: VertexAttachment from VertexAttachment
Deform keys for the deform attachment are also applied to this attachment. May be null if no deform keys should be applied.
id: int readonly, from VertexAttachment
Returns a unique ID for this attachment.
name: string readonly, from Attachment
The attachment's name.
vertices: float[] from VertexAttachment
The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are x,y entries for each vertex. For a weighted attachment, the values are x,y,weight entries for each bone affecting each vertex.
worldVerticesLength: int from VertexAttachment
The maximum number of world vertex values that can be output by computeWorldVertices using the count parameter.
BoundingBoxAttachment Methods
computeWorldVertices (Slot slot, int start, int count, float[] worldVertices, int offset, int stride): void from VertexAttachment
Transforms the attachment's local vertices to world coordinates. If the slot's deform is not empty, it is used to deform the vertices.
See World transforms in the Spine Runtimes Guide.
See VertexAttachment computeWorldVertices.
copy (): Attachment from Attachment
Returns a copy of the attachment.
An attachment with vertices that make up a polygon used for clipping the rendering of other attachments.
ClippingAttachment Properties
bones: int[] from VertexAttachment
The bones which affect the vertices. The array entries are, for each vertex, the number of bones affecting the vertex followed by that many bone indices, which is the index of the bone in bones. Will be null if this attachment has no weights.
color: Color
The color of the clipping attachment as it was in Spine, or a default color if nonessential data was not exported. Clipping attachments are not usually rendered at runtime.
deformAttachment: VertexAttachment from VertexAttachment
Deform keys for the deform attachment are also applied to this attachment. May be null if no deform keys should be applied.
endSlot: SlotData
Clipping is performed between the clipping attachment's slot and the end slot. If null clipping is done until the end of the skeleton's rendering.
id: int readonly, from VertexAttachment
Returns a unique ID for this attachment.
name: string readonly, from Attachment
The attachment's name.
vertices: float[] from VertexAttachment
The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are x,y entries for each vertex. For a weighted attachment, the values are x,y,weight entries for each bone affecting each vertex.
worldVerticesLength: int from VertexAttachment
The maximum number of world vertex values that can be output by computeWorldVertices using the count parameter.
ClippingAttachment Methods
computeWorldVertices (Slot slot, int start, int count, float[] worldVertices, int offset, int stride): void from VertexAttachment
Transforms the attachment's local vertices to world coordinates. If the slot's deform is not empty, it is used to deform the vertices.
See World transforms in the Spine Runtimes Guide.
See VertexAttachment computeWorldVertices.
copy (): Attachment from Attachment
Returns a copy of the attachment.
An attachment that displays a textured mesh. A mesh has hull vertices and internal vertices within the hull. Holes are not supported. Each vertex has UVs (texture coordinates) and triangles are used to map an image on to the mesh.
See Mesh attachments in the Spine User Guide.
MeshAttachment Properties
bones: int[] from VertexAttachment
The bones which affect the vertices. The array entries are, for each vertex, the number of bones affecting the vertex followed by that many bone indices, which is the index of the bone in bones. Will be null if this attachment has no weights.
color: Color
The color to tint the mesh.
deformAttachment: VertexAttachment from VertexAttachment
Deform keys for the deform attachment are also applied to this attachment. May be null if no deform keys should be applied.
edges: int[]
Vertex index pairs describing edges for controlling triangulation, or be null if nonessential data was not exported. Mesh triangles will never cross edges. Triangulation is not performed at runtime.
height: float
The height of the mesh's image, or zero if nonessential data was not exported.
hullLength: int
The number of entries at the beginning of vertices that make up the mesh hull.
id: int readonly, from VertexAttachment
Returns a unique ID for this attachment.
name: string readonly, from Attachment
The attachment's name.
parentMesh: MeshAttachment
The parent mesh if this is a linked mesh, else null. A linked mesh shares the bones, vertices, regionUVs, triangles, hullLength, edges, width, and height with the parent mesh, but may have a different name or path (and therefore a different texture).
path: string
The name of the texture region for this attachment.
regionHeight: float
The height in pixels of the unrotated texture region after whitepace stripping.
regionOffsetX: float
Pixels stripped from the left of the unrotated texture region.
regionOffsetY: float
Pixels stripped from the bottom of the unrotated texture region.
regionOriginalHeight: float
The height in pixels of the unrotated texture region before whitespace stripping.
regionOriginalWidth: float
The width in pixels of the unrotated texture region before whitespace stripping.
regionRotate: bool
If true, the texture region is stored in the atlas rotated 90 degrees counterclockwise.
regionU: float
The normalized (0-1) texture coordinate of the left edge of the texture region.
regionU2: float
The normalized (0-1) texture coordinate of the right edge of the texture region.
regionUVs: float[]
The UV pair for each vertex, normalized within the texture region.
regionV: float
The normalized (0-1) texture coordinate of the top edge of the texture region.
regionV2: float
The normalized (0-1) texture coordinate of the bottom edge of the texture region.
regionWidth: float
The width in pixels of the unrotated texture region after whitespace stripping.
rendererObject: object
A game toolkit specific object used by rendering code, usually set by an AttachmentLoader.
See Generic rendering
triangles: int[]
Triplets of vertex indices which describe the mesh's triangulation.
uvs: float[]
The UV pair for each vertex, normalized within the entire texture.
See updateUVs.
vertices: float[] from VertexAttachment
The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are x,y entries for each vertex. For a weighted attachment, the values are x,y,weight entries for each bone affecting each vertex.
width: float
The width of the mesh's image, or zero if nonessential data was not exported.
worldVerticesLength: int from VertexAttachment
The maximum number of world vertex values that can be output by computeWorldVertices using the count parameter.
MeshAttachment Methods
computeWorldVertices (Slot slot, int start, int count, float[] worldVertices, int offset, int stride): void from VertexAttachment
Transforms the attachment's local vertices to world coordinates. If the slot's deform is not empty, it is used to deform the vertices.
See World transforms in the Spine Runtimes Guide.
See VertexAttachment computeWorldVertices.
copy (): Attachment from Attachment
Returns a copy of the attachment.
newLinkedMesh (): MeshAttachment
Returns a new mesh with the parentMesh set to this mesh's parent mesh, if any, else to this mesh.
updateUVs (): void
Calculates the uvs using the regionUVs and other region settings. Must be called after changing region settings.
An attachment whose vertices make up a composite Bezier curve.
See PathConstraint and Paths in the Spine User Guide.
PathAttachment Properties
bones: int[] from VertexAttachment
The bones which affect the vertices. The array entries are, for each vertex, the number of bones affecting the vertex followed by that many bone indices, which is the index of the bone in bones. Will be null if this attachment has no weights.
closed: bool
If true, the start and end knots are connected.
color: Color
The color of the path as it was in Spine, or a default color if nonessential data was not exported. Paths are not usually rendered at runtime.
constantSpeed: bool
If true, additional calculations are performed to make computing positions along the path more accurate and movement along the path have a constant speed.
deformAttachment: VertexAttachment from VertexAttachment
Deform keys for the deform attachment are also applied to this attachment. May be null if no deform keys should be applied.
id: int readonly, from VertexAttachment
Returns a unique ID for this attachment.
lengths: float[]
The lengths along the path in the setup pose from the start of the path to the end of each Bezier curve.
name: string readonly, from Attachment
The attachment's name.
vertices: float[] from VertexAttachment
The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are x,y entries for each vertex. For a weighted attachment, the values are x,y,weight entries for each bone affecting each vertex.
worldVerticesLength: int from VertexAttachment
The maximum number of world vertex values that can be output by computeWorldVertices using the count parameter.
PathAttachment Methods
computeWorldVertices (Slot slot, int start, int count, float[] worldVertices, int offset, int stride): void from VertexAttachment
Transforms the attachment's local vertices to world coordinates. If the slot's deform is not empty, it is used to deform the vertices.
See World transforms in the Spine Runtimes Guide.
See VertexAttachment computeWorldVertices.
copy (): Attachment from Attachment
Returns a copy of the attachment.
An attachment which is a single point and a rotation. This can be used to spawn projectiles, particles, etc. A bone can be used in similar ways, but a PointAttachment is slightly less expensive to compute and can be hidden, shown, and placed in a skin.
See Point Attachments in the Spine User Guide.
PointAttachment Properties
color: Color
The color of the point attachment as it was in Spine, or a default clor if nonessential data was not exported. Point attachments are not usually rendered at runtime.
name: string readonly, from Attachment
The attachment's name.
rotation: float
x: float
y: float
PointAttachment Methods
computeWorldPosition (Bone bone, 2-tuple point): 2-tuple
computeWorldRotation (Bone bone): float
copy (): Attachment from Attachment
Returns a copy of the attachment.
An attachment that displays a textured quadrilateral.
See Region attachments in the Spine User Guide.
RegionAttachment Properties
color: Color
The color to tint the region attachment.
height: float
The height of the region attachment in Spine.
name: string readonly, from Attachment
The attachment's name.
offset: float[] readonly
For each of the 4 vertices, a pair of x,y values that is the local position of the vertex.
See updateOffset.
path: string
The name of the texture region for this attachment.
regionHeight: float
The height in pixels of the unrotated texture region after whitepace stripping.
regionOffsetX: float
Pixels stripped from the left of the unrotated texture region.
regionOffsetY: float
Pixels stripped from the bottom of the unrotated texture region.
regionOriginalHeight: float
The height in pixels of the unrotated texture region before whitespace stripping.
regionOriginalWidth: float
The width in pixels of the unrotated texture region before whitespace stripping.
regionWidth: float
The width in pixels of the unrotated texture region after whitespace stripping.
rendererObject: object
A game toolkit specific object used by rendering code, usually set by an AttachmentLoader.
See Generic rendering
rotation: float
The local rotation.
scaleX: float
The local scaleX.
scaleY: float
The local scaleY.
uvs: float[] readonly
width: float
The width of the region attachment in Spine.
x: float
The local x translation.
y: float
The local y translation.
RegionAttachment Methods
computeWorldVertices (Bone bone, float[] worldVertices, int offset, int stride): void
Transforms the attachment's four vertices to world coordinates.
See World transforms in the Spine Runtimes Guide.
  • worldVertices The output world vertices. Must have a length >= offset + 8.
  • offset The worldVertices index to begin writing values.
  • stride The number of worldVertices entries between the value pairs written.
computeWorldVertices (Bone bone, float[] worldVertices): void
copy (): Attachment from Attachment
Returns a copy of the attachment.
setUVs (float u, float v, float u2, float v2, bool rotate): void
Sets the normalized (0-1) texture coordinates of the left, top, right, and bottom edges of the texture region.
  • u The left edge.
  • v The top edge.
  • u2 The right edge.
  • v2 The bottom edge.
  • rotate If true, the texture region is stored in the atlas rotated 90 degrees counterclockwise.
updateOffset (): void
Calculates the offset using the region settings. Must be called after changing region settings.
Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by a slot's deform.
VertexAttachment Properties
bones: int[]
The bones which affect the vertices. The array entries are, for each vertex, the number of bones affecting the vertex followed by that many bone indices, which is the index of the bone in bones. Will be null if this attachment has no weights.
deformAttachment: VertexAttachment
Deform keys for the deform attachment are also applied to this attachment. May be null if no deform keys should be applied.
id: int readonly
Returns a unique ID for this attachment.
name: string readonly, from Attachment
The attachment's name.
vertices: float[]
The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are x,y entries for each vertex. For a weighted attachment, the values are x,y,weight entries for each bone affecting each vertex.
worldVerticesLength: int
The maximum number of world vertex values that can be output by computeWorldVertices using the count parameter.
VertexAttachment Methods
computeWorldVertices (Slot slot, int start, int count, float[] worldVertices, int offset, int stride): void
Transforms the attachment's local vertices to world coordinates. If the slot's deform is not empty, it is used to deform the vertices.
See World transforms in the Spine Runtimes Guide.
  • start The index of the first vertices value to transform. Each vertex has 2 values, x and y.
  • count The number of world vertex values to output. Must be <= worldVerticesLength - start.
  • worldVertices The output world vertices. Must have a length >= offset + count * stride / 2.
  • offset The worldVertices index to begin writing values.
  • stride The number of worldVertices entries between the value pairs written.
copy (): Attachment from Attachment
Returns a copy of the attachment.
The interface which can be implemented to customize creating and populating attachments.
See Loading skeleton data in the Spine Runtimes Guide.
AttachmentLoader Methods
newBoundingBoxAttachment (Skin skin, string name): BoundingBoxAttachment
  • <return> May be null to not load the attachment.
newClippingAttachment (Skin skin, string name): ClippingAttachment
  • <return> May be null to not load the attachment.
newMeshAttachment (Skin skin, string name, string path): MeshAttachment
  • <return> May be null to not load the attachment. In that case null should also be returned for child meshes.
newPathAttachment (Skin skin, string name): PathAttachment
  • <return> May be null to not load the attachment.
newPointAttachment (Skin skin, string name): PointAttachment
  • <return> May be null to not load the attachment.
newRegionAttachment (Skin skin, string name, string path): RegionAttachment
  • <return> May be null to not load the attachment.
An AttachmentLoader that configures attachments using texture regions from an Atlas.
See Loading skeleton data in the Spine Runtimes Guide.
AtlasAttachmentLoader Methods
newBoundingBoxAttachment (Skin skin, string name): BoundingBoxAttachment from AttachmentLoader
newClippingAttachment (Skin skin, string name): ClippingAttachment from AttachmentLoader
newMeshAttachment (Skin skin, string name, string path): MeshAttachment from AttachmentLoader
newPathAttachment (Skin skin, string name): PathAttachment from AttachmentLoader
newPointAttachment (Skin skin, string name): PointAttachment from AttachmentLoader
newRegionAttachment (Skin skin, string name, string path): RegionAttachment from AttachmentLoader
Stores the setup pose for a Bone.
BoneData Properties
color: Color
The color of the bone as it was in Spine, or a default color if nonessential data was not exported. Bones are not usually rendered at runtime.
index: int readonly
The index of the bone in bones.
length: float
The bone's length.
name: string readonly
The name of the bone, which is unique across all bones in the skeleton.
parent: BoneData readonly
rotation: float
The local rotation.
scaleX: float
The local scaleX.
scaleY: float
The local scaleY.
shearX: float
The local shearX.
shearY: float
The local shearX.
skinRequired: bool
When true, updateWorldTransform only updates this bone if the skin contains this bone.
See bones.
transformMode: TransformMode
The transform mode for how parent world transforms affect this bone.
x: float
The local x translation.
y: float
The local y translation.
Stores a bone's current pose.
A bone has a local transform which is used to compute its world transform. A bone also has an applied transform, which is a local transform that can be applied to compute the world transform. The local transform and applied transform may differ if a constraint or application code modifies the world transform after it was computed from the local transform.
Bone Properties
a: float
Part of the world transform matrix for the X axis. If changed, updateAppliedTransform should be called.
aRotation: float
The applied local rotation in degrees, counter clockwise.
aScaleX: float
The applied local scaleX.
aScaleY: float
The applied local scaleY.
aShearX: float
The applied local shearX.
aShearY: float
The applied local shearY.
aX: float
The applied local x translation.
aY: float
The applied local y translation.
b: float
Part of the world transform matrix for the Y axis. If changed, updateAppliedTransform should be called.
c: float
Part of the world transform matrix for the X axis. If changed, updateAppliedTransform should be called.
children: list<Bone> readonly
The immediate children of this bone.
d: float
Part of the world transform matrix for the Y axis. If changed, updateAppliedTransform should be called.
data: BoneData readonly
The bone's setup pose data.
parent: Bone readonly
The parent bone, or null if this is the root bone.
rotation: float
The local rotation in degrees, counter clockwise.
scaleX: float
The local scaleX.
scaleY: float
The local scaleY.
shearX: float
The local shearX.
shearY: float
The local shearY.
skeleton: Skeleton readonly
The skeleton this bone belongs to.
worldRotationX: float readonly
The world rotation for the X axis, calculated using a and c.
worldRotationY: float readonly
The world rotation for the Y axis, calculated using b and d.
worldScaleX: float readonly
The magnitude (always positive) of the world scale X, calculated using a and c.
worldScaleY: float readonly
The magnitude (always positive) of the world scale Y, calculated using b and d.
worldX: float
The world X position. If changed, updateAppliedTransform should be called.
worldY: float
The world Y position. If changed, updateAppliedTransform should be called.
x: float
The local x translation.
y: float
The local y translation.
Bone Methods
isActive (): bool
Returns false when the bone has not been computed because skinRequired is true and the skin does not bones this bone.
localToWorld (2-tuple local): 2-tuple
Transforms a point from the bone's local coordinates to world coordinates.
localToWorldRotation (float localRotation): float
Transforms a local rotation to a world rotation.
rotateWorld (float degrees): void
Rotates the world transform the specified amount.
After changes are made to the world transform, updateAppliedTransform should be called and update will need to be called on any child bones, recursively.
setToSetupPose (): void
Sets this bone's local transform to the setup pose.
update (): void
Computes the world transform using the parent bone and this bone's local applied transform.
updateAppliedTransform (): void
Computes the applied transform values from the world transform.
If the world transform is modified (by a constraint, rotateWorld, etc) then this method should be called so the applied transform matches the world transform. The applied transform may be needed by other code (eg to apply another constraint).
Some information is ambiguous in the world transform, such as -1,-1 scale versus 180 rotation. The applied transform after calling this method is equivalent to the local transform used to compute the world transform, but may not be identical.
updateWorldTransform (float x, float y, float rotation, float scaleX, float scaleY, float shearX, float shearY): void
Computes the world transform using the parent bone and the specified local transform. The applied transform is set to the specified local transform. Child bones are not updated.
See World transforms in the Spine Runtimes Guide.
updateWorldTransform (): void
Computes the world transform using the parent bone and this bone's local transform.
See updateWorldTransform.
worldToLocal (2-tuple world): 2-tuple
Transforms a point from world coordinates to the bone's local coordinates.
worldToLocalRotation (float worldRotation): float
Transforms a world rotation to a local rotation.
Determines how a bone inherits world transforms from parent bones.
TransformMode Values
normal
onlyTranslation
noRotationOrReflection
noScale
noScaleOrReflection
The base class for all constraint datas.
ConstraintData Properties
name: string readonly
The constraint's name, which is unique across all constraints in the skeleton of the same type.
order: int
The ordinal of this constraint for the order a skeleton's constraints will be applied by updateWorldTransform.
skinRequired: bool
When true, updateWorldTransform only updates this constraint if the skin contains this constraint.
See constraints.
Stores the setup pose for an IkConstraint.
See IK constraints in the Spine User Guide.
IkConstraintData Properties
bendDirection: int
For two bone IK, controls the bend direction of the IK bones, either 1 or -1.
bones: list<BoneData> readonly
The bones that are constrained by this IK constraint.
compress: bool
For one bone IK, when true and the target is too close, the bone is scaled to reach it.
mix: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
For two bone IK: if the parent bone has local nonuniform scale, the child bone's local Y translation is set to 0.
name: string readonly, from ConstraintData
The constraint's name, which is unique across all constraints in the skeleton of the same type.
order: int from ConstraintData
The ordinal of this constraint for the order a skeleton's constraints will be applied by updateWorldTransform.
skinRequired: bool from ConstraintData
When true, updateWorldTransform only updates this constraint if the skin contains this constraint.
See constraints.
softness: float
For two bone IK, the target bone's distance from the maximum reach of the bones where rotation begins to slow. The bones will not straighten completely until the target is this far out of range.
stretch: bool
When true and the target is out of range, the parent bone is scaled to reach it.
For two bone IK: 1) the child bone's local Y translation is set to 0, 2) stretch is not applied if softness is > 0, and 3) if the parent bone has local nonuniform scale, stretch is not applied.
target: BoneData
The bone that is the IK target.
uniform: bool
When true and compress or stretch is used, the bone is scaled on both the X and Y axes.
Stores the current pose for an IK constraint. An IK constraint adjusts the rotation of 1 or 2 constrained bones so the tip of the last bone is as close to the target bone as possible.
See IK constraints in the Spine User Guide.
IkConstraint Properties
bendDirection: int
For two bone IK, controls the bend direction of the IK bones, either 1 or -1.
bones: list<Bone> readonly
The bones that will be modified by this IK constraint.
compress: bool
For one bone IK, when true and the target is too close, the bone is scaled to reach it.
data: IkConstraintData readonly
The IK constraint's setup pose data.
mix: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
For two bone IK: if the parent bone has local nonuniform scale, the child bone's local Y translation is set to 0.
softness: float
For two bone IK, the target bone's distance from the maximum reach of the bones where rotation begins to slow. The bones will not straighten completely until the target is this far out of range.
stretch: bool
When true and the target is out of range, the parent bone is scaled to reach it.
For two bone IK: 1) the child bone's local Y translation is set to 0, 2) stretch is not applied if softness is > 0, and 3) if the parent bone has local nonuniform scale, stretch is not applied.
target: Bone
The bone that is the IK target.
IkConstraint Methods
isActive (): bool
update (): void
Applies the constraint to the constrained bones.
apply (Bone parent, Bone child, float targetX, float targetY, int bendDir, bool stretch, bool uniform, float softness, float alpha): void static
Applies 2 bone IK. The target is specified in the world coordinate system.
  • child A direct descendant of the parent bone.
apply (Bone bone, float targetX, float targetY, bool compress, bool stretch, bool uniform, float alpha): void static
Applies 1 bone IK. The target is specified in the world coordinate system.
Stores the setup pose for a PathConstraint.
See Path constraints in the Spine User Guide.
PathConstraintData Properties
bones: list<BoneData> readonly
The bones that will be modified by this path constraint.
mixRotate: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
mixX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation X.
mixY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y.
name: string readonly, from ConstraintData
The constraint's name, which is unique across all constraints in the skeleton of the same type.
offsetRotation: float
An offset added to the constrained bone rotation.
order: int from ConstraintData
The ordinal of this constraint for the order a skeleton's constraints will be applied by updateWorldTransform.
position: float
The position along the path.
positionMode: PositionMode
The mode for positioning the first bone on the path.
rotateMode: RotateMode
The mode for adjusting the rotation of the bones.
skinRequired: bool from ConstraintData
When true, updateWorldTransform only updates this constraint if the skin contains this constraint.
See constraints.
spacing: float
The spacing between bones.
spacingMode: SpacingMode
The mode for positioning the bones after the first bone on the path.
target: SlotData
The slot whose path attachment will be used to constrained the bones.
Stores the current pose for a path constraint. A path constraint adjusts the rotation, translation, and scale of the constrained bones so they follow a PathAttachment.
See Path constraints in the Spine User Guide.
PathConstraint Properties
bones: list<Bone> readonly
The bones that will be modified by this path constraint.
data: PathConstraintData readonly
The path constraint's setup pose data.
mixRotate: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
mixX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation X.
mixY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y.
position: float
The position along the path.
spacing: float
The spacing between bones.
target: Slot
The slot whose path attachment will be used to constrained the bones.
PathConstraint Methods
isActive (): bool
update (): void
Applies the constraint to the constrained bones.
Controls how the first bone is positioned along the path.
See Position mode in the Spine User Guide.
PositionMode Values
fixed
percent
Controls how bones are rotated, translated, and scaled to match the path.
See Rotate mode in the Spine User Guide.
RotateMode Values
tangent
chain
chainScale
When chain scale, constrained bones should all have the same parent. That way when the path constraint scales a bone, it doesn't affect other constrained bones.
Controls how bones after the first bone are positioned along the path.
See Spacing mode in the Spine User Guide.
SpacingMode Values
length
fixed
percent
proportional
Stores the setup pose for a TransformConstraint.
See Transform constraints in the Spine User Guide.
TransformConstraintData Properties
bones: list<BoneData> readonly
The bones that will be modified by this transform constraint.
local: bool
mixRotate: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
mixScaleX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained scale X.
mixScaleY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained scale Y.
mixShearY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained shear Y.
mixX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation X.
mixY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y.
name: string readonly, from ConstraintData
The constraint's name, which is unique across all constraints in the skeleton of the same type.
offsetRotation: float
An offset added to the constrained bone rotation.
offsetScaleX: float
An offset added to the constrained bone scaleX.
offsetScaleY: float
An offset added to the constrained bone scaleY.
offsetShearY: float
An offset added to the constrained bone shearY.
offsetX: float
An offset added to the constrained bone X translation.
offsetY: float
An offset added to the constrained bone Y translation.
order: int from ConstraintData
The ordinal of this constraint for the order a skeleton's constraints will be applied by updateWorldTransform.
relative: bool
skinRequired: bool from ConstraintData
When true, updateWorldTransform only updates this constraint if the skin contains this constraint.
See constraints.
target: BoneData
The target bone whose world transform will be copied to the constrained bones.
Stores the current pose for a transform constraint. A transform constraint adjusts the world transform of the constrained bones to match that of the target bone.
See Transform constraints in the Spine User Guide.
TransformConstraint Properties
bones: list<Bone> readonly
The bones that will be modified by this transform constraint.
data: TransformConstraintData readonly
The transform constraint's setup pose data.
mixRotate: float
A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
mixScaleX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained scale X.
mixScaleY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained scale X.
mixShearY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained shear Y.
mixX: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation X.
mixY: float
A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y.
target: Bone
The target bone whose world transform will be copied to the constrained bones.
TransformConstraint Methods
isActive (): bool
update (): void
Applies the constraint to the constrained bones.
Stores the setup pose values for an Event.
See Events in the Spine User Guide.
EventData Properties
audioPath: string
balance: float
floatValue: float
The event's float value.
intValue: int
The event's int value.
name: string readonly
The name of the event, which is unique across all events in the skeleton.
stringValue: string
The event's string value or an empty string.
volume: float
Stores the current pose values for an Event.
See Timeline apply, AnimationStateListener event, and Events in the Spine User Guide.
Event Properties
balance: float
data: EventData readonly
The events's setup pose data.
floatValue: float
The event's float value.
intValue: int
The event's int value.
stringValue: string
The event's string value or an empty string.
time: float readonly
The animation time this event was keyed.
volume: float
Collects each visible BoundingBoxAttachment and computes the world vertices for its polygon. The polygon vertices are provided along with convenience methods for doing hit detection.
SkeletonBounds Properties
boundingBoxes: list<BoundingBoxAttachment> readonly
The visible bounding boxes.
height: float readonly
The height of the axis aligned bounding box.
maxX: float readonly
The right edge of the axis aligned bounding box.
maxY: float readonly
The top edge of the axis aligned bounding box.
minX: float readonly
The left edge of the axis aligned bounding box.
minY: float readonly
The bottom edge of the axis aligned bounding box.
polygons: list<float[]> readonly
The world vertices for the bounding box polygons.
width: float readonly
The width of the axis aligned bounding box.
SkeletonBounds Methods
aabbContainsPoint (float x, float y): bool
Returns true if the axis aligned bounding box contains the point.
aabbIntersectsSegment (float x1, float y1, float x2, float y2): bool
Returns true if the axis aligned bounding box intersects the line segment.
aabbIntersectsSkeleton (SkeletonBounds bounds): bool
Returns true if the axis aligned bounding box intersects the axis aligned bounding box of the specified bounds.
containsPoint (float[] polygon, float x, float y): bool
Returns true if the polygon contains the point.
containsPoint (float x, float y): BoundingBoxAttachment
Returns the first bounding box attachment that contains the point, or null. When doing many checks, it is usually more efficient to only call this method if aabbContainsPoint returns true.
  • <return> May be null.
getPolygon (BoundingBoxAttachment boundingBox): float[]
Returns the polygon for the specified bounding box, or null.
  • <return> May be null.
intersectsSegment (float[] polygon, float x1, float y1, float x2, float y2): bool
Returns true if the polygon contains any part of the line segment.
intersectsSegment (float x1, float y1, float x2, float y2): BoundingBoxAttachment
Returns the first bounding box attachment that contains any part of the line segment, or null. When doing many checks, it is usually more efficient to only call this method if aabbIntersectsSegment returns true.
  • <return> May be null.
update (Skeleton skeleton, bool updateAabb): void
Clears any previous polygons, finds all visible bounding box attachments, and computes the world vertices for each bounding box's polygon.
  • updateAabb If true, the axis aligned bounding box containing all the polygons is computed. If false, the SkeletonBounds AABB methods will always return true.
Stores the setup pose and all of the stateless data for a skeleton.
See Data objects in the Spine Runtimes Guide.
SkeletonData Properties
animations: list<Animation> readonly
The skeleton's animations.
audioPath: string
The path to the audio directory as defined in Spine, or null if nonessential data was not exported.
bones: list<BoneData> readonly
The skeleton's bones, sorted parent first. The root bone is always the first bone.
defaultSkin: Skin
The skeleton's default skin. By default this skin contains all attachments that were not in a skin in Spine.
See getAttachment.
events: list<EventData> readonly
The skeleton's events.
fps: float
The dopesheet FPS in Spine, or zero if nonessential data was not exported.
hash: string
The skeleton data hash. This value will change if any of the skeleton data has changed.
height: float
The height of the skeleton's axis aligned bounding box in the setup pose.
ikConstraints: list<IkConstraintData> readonly
The skeleton's IK constraints.
imagesPath: string
The path to the images directory as defined in Spine, or null if nonessential data was not exported.
name: string
The skeleton's name, which by default is the name of the skeleton data file when possible, or null when a name hasn't been set.
pathConstraints: list<PathConstraintData> readonly
The skeleton's path constraints.
skins: list<Skin> readonly
All skins, including the default skin.
slots: list<SlotData> readonly
The skeleton's slots.
transformConstraints: list<TransformConstraintData> readonly
The skeleton's transform constraints.
version: string
The Spine version used to export the skeleton data, or null.
width: float
The width of the skeleton's axis aligned bounding box in the setup pose.
x: float
The X coordinate of the skeleton's axis aligned bounding box in the setup pose.
y: float
The Y coordinate of the skeleton's axis aligned bounding box in the setup pose.
SkeletonData Methods
findAnimation (string animationName): Animation
Finds an animation by comparing each animation's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findBone (string boneName): BoneData
Finds a bone by comparing each bone's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findEvent (string eventDataName): EventData
Finds an event by comparing each events's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findIkConstraint (string constraintName): IkConstraintData
Finds an IK constraint by comparing each IK constraint's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findPathConstraint (string constraintName): PathConstraintData
Finds a path constraint by comparing each path constraint's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findSkin (string skinName): Skin
Finds a skin by comparing each skin's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findSlot (string slotName): SlotData
Finds a slot by comparing each slot's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
findTransformConstraint (string constraintName): TransformConstraintData
Finds a transform constraint by comparing each transform constraint's name. It is more efficient to cache the results of this method than to call it multiple times.
  • <return> May be null.
Stores the current pose for a skeleton.
See Instance objects in the Spine Runtimes Guide.
Skeleton Properties
bones: list<Bone> readonly
The skeleton's bones, sorted parent first. The root bone is always the first bone.
color: Color
The color to tint all the skeleton's attachments.
data: SkeletonData readonly
The skeleton's setup pose data.
drawOrder: list<Slot>
The skeleton's slots in the order they should be drawn. The returned array may be modified to change the draw order.
ikConstraints: list<IkConstraint> readonly
The skeleton's IK constraints.
pathConstraints: list<PathConstraint> readonly
The skeleton's path constraints.
rootBone: Bone readonly
The root bone, or null if the skeleton has no bones.
scaleX: float
Scales the entire skeleton on the X axis. This affects all bones, even if the bone's transform mode disallows scale inheritance.
scaleY: float
Scales the entire skeleton on the Y axis. This affects all bones, even if the bone's transform mode disallows scale inheritance.
skin: Skin
The skeleton's current skin.
slots: list<Slot> readonly
The skeleton's slots.
time: float
The skeleton's time. This can be used for tracking, such as with Slot attachmentTime.
See update.
transformConstraints: list<TransformConstraint> readonly
The skeleton's transform constraints.
x: float
Sets the skeleton X position, which is added to the root bone worldX position.
y: float
Sets the skeleton Y position, which is added to the root bone worldY position.
Skeleton Methods
findBone (string boneName): Bone
Finds a bone by comparing each bone's name. It is more efficient to cache the results of this method than to call it repeatedly.
  • <return> May be null.
findIkConstraint (string constraintName): IkConstraint
Finds an IK constraint by comparing each IK constraint's name. It is more efficient to cache the results of this method than to call it repeatedly.
  • <return> May be null.
findPathConstraint (string constraintName): PathConstraint
Finds a path constraint by comparing each path constraint's name. It is more efficient to cache the results of this method than to call it repeatedly.
  • <return> May be null.
findSlot (string slotName): Slot
Finds a slot by comparing each slot's name. It is more efficient to cache the results of this method than to call it repeatedly.
  • <return> May be null.
findTransformConstraint (string constraintName): TransformConstraint
Finds a transform constraint by comparing each transform constraint's name. It is more efficient to cache the results of this method than to call it repeatedly.
  • <return> May be null.
getAttachment (int slotIndex, string attachmentName): Attachment
Finds an attachment by looking in the skin and defaultSkin using the slot index and attachment name. First the skin is checked and if the attachment was not found, the default skin is checked.
See Runtime skins in the Spine Runtimes Guide.
  • <return> May be null.
getAttachment (string slotName, string attachmentName): Attachment
Finds an attachment by looking in the skin and defaultSkin using the slot name and attachment name.
See getAttachment.
  • <return> May be null.
getBounds (2-tuple offset, 2-tuple size, float[] temp): void
Returns the axis aligned bounding box (AABB) of the region and mesh attachments for the current pose.
  • offset An output value, the distance from the skeleton origin to the bottom left corner of the AABB.
  • size An output value, the width and height of the AABB.
  • temp Working memory to temporarily store attachments' computed world vertices.
setAttachment (string slotName, string attachmentName): void
A convenience method to set an attachment by finding the slot with findSlot, finding the attachment with getAttachment, then setting the slot's attachment.
  • attachmentName May be null to clear the slot's attachment.
setBonesToSetupPose (): void
Sets the bones and constraints to their setup pose values.
setColor (float r, float g, float b, float a): void
A convenience method for setting the skeleton color. The color can also be set by modifying color.
setScale (float scaleX, float scaleY): void
setSkin (Skin newSkin): void
Sets the skin used to look up attachments before looking in the defaultSkin. If the skin is changed, updateCache is called.
Attachments from the new skin are attached if the corresponding attachment from the old skin was attached. If there was no old skin, each slot's setup mode attachment is attached from the new skin.
After changing the skin, the visible attachments can be reset to those attached in the setup pose by calling setSlotsToSetupPose. Also, often apply is called before the next time the skeleton is rendered to allow any attachment keys in the current animation(s) to hide or show attachments from the new skin.
  • newSkin May be null.
setSkin (string skinName): void
Sets a skin by name.
See setSkin.
setSlotsToSetupPose (): void
Sets the slots and draw order to their setup pose values.
setToSetupPose (): void
Sets the bones, constraints, slots, and draw order to their setup pose values.
update (float delta): void
Increments the skeleton's time.
updateCache (): void
Caches information about bones and constraints. Must be called if the skin is modified or if bones, constraints, or weighted path attachments are added or removed.
updateWorldTransform (Bone parent): void
Temporarily sets the root bone as a child of the specified bone, then updates the world transform for each bone and applies all constraints.
See World transforms in the Spine Runtimes Guide.
updateWorldTransform (): void
Updates the world transform for each bone and applies all constraints.
See World transforms in the Spine Runtimes Guide.
Base class for loading skeleton data from a file.
See JSON and binary data in the Spine Runtimes Guide.
SkeletonLoader Properties
scale: float
Scales bone positions, image sizes, and translations as they are loaded. This allows different size images to be used at runtime than were used in Spine.
See Scaling in the Spine Runtimes Guide.
SkeletonLoader Methods
readSkeletonData (object data): SkeletonData
Deserializes the Spine skeleton data into a SkeletonData object.
Loads skeleton data in the Spine binary format.
See Spine binary format and JSON and binary data in the Spine Runtimes Guide.
SkeletonBinary Properties
BONE_ROTATE = 0: int static, readonly
BONE_TRANSLATE = 1: int static, readonly
BONE_TRANSLATEX = 2: int static, readonly
BONE_TRANSLATEY = 3: int static, readonly
BONE_SCALE = 4: int static, readonly
BONE_SCALEX = 5: int static, readonly
BONE_SCALEY = 6: int static, readonly
BONE_SHEAR = 7: int static, readonly
BONE_SHEARX = 8: int static, readonly
BONE_SHEARY = 9: int static, readonly
SLOT_ATTACHMENT = 0: int static, readonly
SLOT_RGBA = 1: int static, readonly
SLOT_RGB = 2: int static, readonly
SLOT_RGBA2 = 3: int static, readonly
SLOT_RGB2 = 4: int static, readonly
SLOT_ALPHA = 5: int static, readonly
PATH_POSITION = 0: int static, readonly
PATH_SPACING = 1: int static, readonly
PATH_MIX = 2: int static, readonly
CURVE_LINEAR = 0: int static, readonly
CURVE_STEPPED = 1: int static, readonly
CURVE_BEZIER = 2: int static, readonly
scale: float from SkeletonLoader
Scales bone positions, image sizes, and translations as they are loaded. This allows different size images to be used at runtime than were used in Spine.
See Scaling in the Spine Runtimes Guide.
SkeletonBinary Methods
readSkeletonData (object data): SkeletonData from SkeletonLoader
Deserializes the Spine skeleton data into a SkeletonData object.
Loads skeleton data in the Spine JSON format.
JSON is human readable but the binary format is much smaller on disk and faster to load. See SkeletonBinary.
See Spine JSON format and JSON and binary data in the Spine Runtimes Guide.
SkeletonJson Properties
scale: float from SkeletonLoader
Scales bone positions, image sizes, and translations as they are loaded. This allows different size images to be used at runtime than were used in Spine.
See Scaling in the Spine Runtimes Guide.
SkeletonJson Methods
readSkeletonData (object data): SkeletonData from SkeletonLoader
Deserializes the Spine skeleton data into a SkeletonData object.
Stores attachments by slot index and attachment name.
See SkeletonData defaultSkin, Skeleton skin, and Runtime skins in the Spine Runtimes Guide.
Skin Properties
attachments: list<SkinEntry> readonly
Returns all attachments in this skin.
bones: list<BoneData> readonly
constraints: list<ConstraintData> readonly
name: string readonly
The skin's name, which is unique across all skins in the skeleton.
Skin Methods
addSkin (Skin skin): void
Adds all attachments, bones, and constraints from the specified skin to this skin.
clear (): void
Clears all attachments, bones, and constraints.
copySkin (Skin skin): void
Adds all bones and constraints and copies of all attachments from the specified skin to this skin. Mesh attachments are not copied, instead a new linked mesh is created. The attachment copies can be modified without affecting the originals.
getAttachment (int slotIndex, string name): Attachment
Returns the attachment for the specified slot index and name, or null.
  • <return> May be null.
getAttachments (int slotIndex, list<SkinEntry> attachments): void
Returns all attachments in this skin for the specified slot index.
removeAttachment (int slotIndex, string name): void
Removes the attachment in the skin for the specified slot index and name, if any.
setAttachment (int slotIndex, string name, Attachment attachment): void
Adds an attachment to the skin for the specified slot index and name.
Stores an entry in the skin consisting of the slot index and the attachment name.
SkinEntry Properties
name: string readonly
The name the attachment is associated with, equivalent to the skin placeholder name in the Spine editor.
slotIndex: int readonly
Stores the setup pose for a Slot.
SlotData Properties
attachmentName: string
The name of the attachment that is visible for this slot in the setup pose, or null if no attachment is visible.
blendMode: BlendMode
The blend mode for drawing the slot's attachment.
boneData: BoneData readonly
The bone this slot belongs to.
color: Color
The color used to tint the slot's attachment. If darkColor is set, this is used as the light color for two color tinting.
darkColor: Color
The dark color used to tint the slot's attachment for two color tinting, or null if two color tinting is not used. The dark color's alpha is not used.
index: int readonly
The index of the slot in slots.
name: string readonly
The name of the slot, which is unique across all slots in the skeleton.
Determines how images are blended with existing pixels when drawn.
BlendMode Values
normal
additive
multiply
screen
Stores a slot's current pose. Slots organize attachments for drawOrder purposes and provide a place to store state for an attachment. State cannot be stored in an attachment itself because attachments are stateless and may be shared across multiple skeletons.
Slot Properties
attachment: Attachment
The current attachment for the slot, or null if the slot has no attachment.
attachmentTime: float
The time that has elapsed since the last time the attachment was set or cleared. Relies on Skeleton time.
bone: Bone readonly
The bone this slot belongs to.
color: Color
The color used to tint the slot's attachment. If darkColor is set, this is used as the light color for two color tinting.
darkColor: Color
The dark color used to tint the slot's attachment for two color tinting, or null if two color tinting is not used. The dark color's alpha is not used.
data: SlotData readonly
The slot's setup pose data.
deform: float[]
Values to deform the slot's attachment. For an unweighted mesh, the entries are local positions for each vertex. For a weighted mesh, the entries are an offset for each vertex which will be added to the mesh's local vertex positions.
See computeWorldVertices and DeformTimeline.
skeleton: Skeleton readonly
The skeleton this slot belongs to.
Slot Methods
setToSetupPose (): void
Sets this slot to the setup pose.

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