@esotericsoftware/spine-core
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The official Spine Runtimes for the web.
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JavaScript
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated April 5, 2025. Replaces all prior versions.
*
* Copyright (c) 2013-2025, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software
* or otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
import { SliderData } from "./SliderData.js";
/** Stores the setup pose and all of the stateless data for a skeleton.
*
* See [Data objects](http://esotericsoftware.com/spine-runtime-architecture#Data-objects) in the Spine Runtimes
* Guide. */
export class SkeletonData {
/** The skeleton's name, which by default is the name of the skeleton data file, if possible. May be null. */
name = null;
/** The skeleton's bones, sorted parent first. The root bone is always the first bone. */
bones = []; // Ordered parents first.
/** The skeleton's slots in the setup pose draw order. */
slots = []; // Setup pose draw order.
skins = [];
/** The skeleton's default skin. By default this skin contains all attachments that were not in a skin in Spine.
*
* See {@link Skeleton.getAttachmentByName}.
* May be null. */
defaultSkin = null;
/** The skeleton's events. */
events = [];
/** The skeleton's animations. */
animations = [];
/** The skeleton's IK constraints. */
// biome-ignore lint/suspicious/noExplicitAny: reference runtime does not restrict to specific types
constraints = [];
/** The X coordinate of the skeleton's axis aligned bounding box in the setup pose. */
x = 0;
/** The Y coordinate of the skeleton's axis aligned bounding box in the setup pose. */
y = 0;
/** The width of the skeleton's axis aligned bounding box in the setup pose. */
width = 0;
/** The height of the skeleton's axis aligned bounding box in the setup pose. */
height = 0;
/** Baseline scale factor for applying distance-dependent effects on non-scalable properties, such as angle or scale. Default
* is 100. */
referenceScale = 100;
/** The Spine version used to export the skeleton data, or null. */
version = null;
/** The skeleton data hash. This value will change if any of the skeleton data has changed. May be null. */
hash = null;
// Nonessential
/** The dopesheet FPS in Spine. Available only when nonessential data was exported. */
fps = 30;
/** The path to the images folder as defined in Spine. Available only when nonessential data was exported. May be null. */
imagesPath = null;
/** The path to the audio folder as defined in Spine. Available only when nonessential data was exported. May be null. */
audioPath = null;
/** 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.
* @returns May be null. */
findBone(boneName) {
if (!boneName)
throw new Error("boneName cannot be null.");
const bones = this.bones;
for (let i = 0, n = bones.length; i < n; i++)
if (bones[i].name === boneName)
return bones[i];
return null;
}
/** 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.
* @returns May be null. */
findSlot(slotName) {
if (!slotName)
throw new Error("slotName cannot be null.");
const slots = this.slots;
for (let i = 0, n = slots.length; i < n; i++)
if (slots[i].name === slotName)
return slots[i];
return null;
}
/** 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.
* @returns May be null. */
findSkin(skinName) {
if (!skinName)
throw new Error("skinName cannot be null.");
const skins = this.skins;
for (let i = 0, n = skins.length; i < n; i++)
if (skins[i].name === skinName)
return skins[i];
return null;
}
/** 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.
* @returns May be null. */
findEvent(eventDataName) {
if (!eventDataName)
throw new Error("eventDataName cannot be null.");
const events = this.events;
for (let i = 0, n = events.length; i < n; i++)
if (events[i].name === eventDataName)
return events[i];
return null;
}
/** Collects animations used by {@link SliderData slider constraints}.
*
* Slider animations are designed to be applied by slider constraints rather than on their own. Applications that have a user
* choose an animation may want to exclude them. */
findSliderAnimations(animations) {
const constraints = this.constraints;
for (let i = 0, n = this.constraints.length; i < n; i++) {
const data = constraints[i];
if (data instanceof SliderData && data.animation != null)
animations.push(data.animation);
}
return animations;
}
/** 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.
* @returns May be null. */
findAnimation(animationName) {
if (!animationName)
throw new Error("animationName cannot be null.");
const animations = this.animations;
for (let i = 0, n = animations.length; i < n; i++)
if (animations[i].name === animationName)
return animations[i];
return null;
}
// --- Constraints.
/** Finds a constraint of the specified type by comparing each constraints's name. It is more efficient to cache the results of
* this method than to call it multiple times. */
// biome-ignore lint/suspicious/noExplicitAny: reference runtime does not restrict to specific types
findConstraint(constraintName, type) {
if (!constraintName)
throw new Error("constraintName cannot be null.");
if (type == null)
throw new Error("type cannot be null.");
const constraints = this.constraints;
for (let i = 0, n = this.constraints.length; i < n; i++) {
const constraint = constraints[i];
if (constraint instanceof type && constraint.name === constraintName)
return constraint;
}
return null;
}
}
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Replaces all prior versions.\n *\n * Copyright (c) 2013-2025, Esoteric Software LLC\n *\n * Integration of the Spine Runtimes into software or otherwise creating\n * derivative works of the Spine Runtimes is permitted under the terms and\n * conditions of Section 2 of the Spine Editor License Agreement:\n * http://esotericsoftware.com/spine-editor-license\n *\n * Otherwise, it is permitted to integrate the Spine Runtimes into software\n * or otherwise create derivative works of the Spine Runtimes (collectively,\n * \"Products\"), provided that each user of the Products must obtain their own\n * Spine Editor license and redistribution of the Products in any form must\n * include this license and copyright notice.\n *\n * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC \"AS IS\" AND ANY\n * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY\n * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,\n * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND\n * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *****************************************************************************/\n\nimport type { Animation } from \"./Animation.js\";\nimport type { Skeleton } from \"./Skeleton.js\";\nimport type { BoneData } from \"./BoneData.js\";\nimport type { ConstraintData } from \"./ConstraintData.js\";\nimport type { EventData } from \"./EventData.js\";\nimport type { Skin } from \"./Skin.js\";\nimport { SliderData } from \"./SliderData.js\";\nimport type { SlotData } from \"./SlotData.js\";\n\n/** Stores the setup pose and all of the stateless data for a skeleton.\n *\n * See [Data objects](http://esotericsoftware.com/spine-runtime-architecture#Data-objects) in the Spine Runtimes\n * Guide. */\nexport class SkeletonData {\n\n\t/** The skeleton's name, which by default is the name of the skeleton data file, if possible. May be null. */\n\tname: string | null = null;\n\n\t/** The skeleton's bones, sorted parent first. The root bone is always the first bone. */\n\tbones = [] as BoneData[]; // Ordered parents first.\n\n\t/** The skeleton's slots in the setup pose draw order. */\n\tslots = [] as SlotData[]; // Setup pose draw order.\n\n\tskins = [] as Skin[];\n\n\t/** The skeleton's default skin. By default this skin contains all attachments that were not in a skin in Spine.\n\t *\n\t * See {@link Skeleton.getAttachmentByName}.\n\t * May be null. */\n\tdefaultSkin: Skin | null = null;\n\n\t/** The skeleton's events. */\n\tevents = [] as EventData[];\n\n\t/** The skeleton's animations. */\n\tanimations = [] as Animation[];\n\n\t/** The skeleton's IK constraints. */\n\t// biome-ignore lint/suspicious/noExplicitAny: reference runtime does not restrict to specific types\n\tconstraints = [] as ConstraintData<any, any>[];\n\n\t/** The X coordinate of the skeleton's axis aligned bounding box in the setup pose. */\n\tx: number = 0;\n\n\t/** The Y coordinate of the skeleton's axis aligned bounding box in the setup pose. */\n\ty: number = 0;\n\n\t/** The width of the skeleton's axis aligned bounding box in the setup pose. */\n\twidth: number = 0;\n\n\t/** The height of the skeleton's axis aligned bounding box in the setup pose. */\n\theight: number = 0;\n\n\t/** Baseline scale factor for applying distance-dependent effects on non-scalable properties, such as angle or scale. Default\n\t * is 100. */\n\treferenceScale = 100;\n\n\t/** The Spine version used to export the skeleton data, or null. */\n\tversion: string | null = null;\n\n\t/** The skeleton data hash. This value will change if any of the skeleton data has changed. May be null. */\n\thash: string | null = null;\n\n\t// Nonessential\n\t/** The dopesheet FPS in Spine. Available only when nonessential data was exported. */\n\tfps = 30;\n\n\t/** The path to the images folder as defined in Spine. Available only when nonessential data was exported. May be null. */\n\timagesPath: string | null = null;\n\n\t/** The path to the audio folder as defined in Spine. Available only when nonessential data was exported. May be null. */\n\taudioPath: string | null = null;\n\n\t/** Finds a bone by comparing each bone's name. It is more efficient to cache the results of this method than to call it\n\t * multiple times.\n\t * @returns May be null. */\n\tfindBone (boneName: string) {\n\t\tif (!boneName) throw new Error(\"boneName cannot be null.\");\n\t\tconst bones = this.bones;\n\t\tfor (let i = 0, n = bones.length; i < n; i++)\n\t\t\tif (bones[i].name === boneName) return bones[i];\n\t\treturn null;\n\t}\n\n\t/** Finds a slot by comparing each slot's name. It is more efficient to cache the results of this method than to call it\n\t * multiple times.\n\t * @returns May be null. */\n\tfindSlot (slotName: string) {\n\t\tif (!slotName) throw new Error(\"slotName cannot be null.\");\n\t\tconst slots = this.slots;\n\t\tfor (let i = 0, n = slots.length; i < n; i++)\n\t\t\tif (slots[i].name === slotName) return slots[i];\n\t\treturn null;\n\t}\n\n\t/** Finds a skin by comparing each skin's name. It is more efficient to cache the results of this method than to call it\n\t * multiple times.\n\t * @returns May be null. */\n\tfindSkin (skinName: string) {\n\t\tif (!skinName) throw new Error(\"skinName cannot be null.\");\n\t\tconst skins = this.skins;\n\t\tfor (let i = 0, n = skins.length; i < n; i++)\n\t\t\tif (skins[i].name === skinName) return skins[i];\n\t\treturn null;\n\t}\n\n\t/** Finds an event by comparing each events's name. It is more efficient to cache the results of this method than to call it\n\t * multiple times.\n\t * @returns May be null. */\n\tfindEvent (eventDataName: string) {\n\t\tif (!eventDataName) throw new Error(\"eventDataName cannot be null.\");\n\t\tconst events = this.events;\n\t\tfor (let i = 0, n = events.length; i < n; i++)\n\t\t\tif (events[i].name === eventDataName) return events[i];\n\t\treturn null;\n\t}\n\n\t/** Collects animations used by {@link SliderData slider constraints}.\n\t *\n\t * Slider animations are designed to be applied by slider constraints rather than on their own. Applications that have a user\n\t * choose an animation may want to exclude them. */\n\tfindSliderAnimations (animations: Animation[]): Animation[] {\n\t\tconst constraints = this.constraints;\n\t\tfor (let i = 0, n = this.constraints.length; i < n; i++) {\n\t\t\tconst data = constraints[i];\n\t\t\tif (data instanceof SliderData && data.animation != null) animations.push(data.animation);\n\t\t}\n\t\treturn animations;\n\t}\n\n\t/** Finds an animation by comparing each animation's name. It is more efficient to cache the results of this method than to\n\t * call it multiple times.\n\t * @returns May be null. */\n\tfindAnimation (animationName: string) {\n\t\tif (!animationName) throw new Error(\"animationName cannot be null.\");\n\t\tconst animations = this.animations;\n\t\tfor (let i = 0, n = animations.length; i < n; i++)\n\t\t\tif (animations[i].name === animationName) return animations[i];\n\t\treturn null;\n\t}\n\n\t// --- Constraints.\n\n\t/** Finds a constraint of the specified type by comparing each constraints's name. It is more efficient to cache the results of\n\t  * this method than to call it multiple times. */\n\t// biome-ignore lint/suspicious/noExplicitAny: reference runtime does not restrict to specific types\n\tfindConstraint<T extends ConstraintData<any, any>> (constraintName: string, type: new (name: string) => T): T | null {\n\t\tif (!constraintName) throw new Error(\"constraintName cannot be null.\");\n\t\tif (type == null) throw new Error(\"type cannot be null.\");\n\t\tconst constraints = this.constraints;\n\t\tfor (let i = 0, n = this.constraints.length; i < n; i++) {\n\t\t\tconst constraint = constraints[i];\n\t\t\tif (constraint instanceof type && constraint.name === constraintName) return constraint as T;\n\t\t}\n\t\treturn null;\n\t}\n\n}\n"]}