@esotericsoftware/spine-core
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The official Spine Runtimes for the web.
148 lines • 23.2 kB
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 { Utils } from "../Utils.js";
/** The base class for all attachments. */
export class Attachment {
name;
constructor(name) {
if (!name)
throw new Error("name cannot be null.");
this.name = name;
}
}
/** Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by a slot's
* {@link Slot#deform}. */
export class VertexAttachment extends Attachment {
static nextID = 0;
/** The unique ID for this attachment. */
id = VertexAttachment.nextID++;
/** The bones which affect the {@link #getVertices()}. 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 {@link Skeleton#bones}. Will be null
* if this attachment has no weights. */
bones = null;
/** 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. */
vertices = [];
/** The maximum number of world vertex values that can be output by
* {@link #computeWorldVertices()} using the `count` parameter. */
worldVerticesLength = 0;
/** Timelines for the timeline attachment are also applied to this attachment.
* May be null if no attachment-specific timelines should be applied. */
timelineAttachment = this;
constructor(name) {
super(name);
}
/** Transforms the attachment's local {@link #vertices} to world coordinates. If the slot's {@link Slot#deform} is
* not empty, it is used to deform the vertices.
*
* See [World transforms](http://esotericsoftware.com/spine-runtime-skeletons#World-transforms) in the Spine
* Runtimes Guide.
* @param start The index of the first {@link #vertices} value to transform. Each vertex has 2 values, x and y.
* @param count The number of world vertex values to output. Must be <= {@link #worldVerticesLength} - `start`.
* @param worldVertices The output world vertices. Must have a length >= `offset` + `count` *
* `stride` / 2.
* @param offset The `worldVertices` index to begin writing values.
* @param stride The number of `worldVertices` entries between the value pairs written. */
computeWorldVertices(slot, start, count, worldVertices, offset, stride) {
count = offset + (count >> 1) * stride;
let skeleton = slot.bone.skeleton;
let deformArray = slot.deform;
let vertices = this.vertices;
let bones = this.bones;
if (!bones) {
if (deformArray.length > 0)
vertices = deformArray;
let bone = slot.bone;
let x = bone.worldX;
let y = bone.worldY;
let a = bone.a, b = bone.b, c = bone.c, d = bone.d;
for (let v = start, w = offset; w < count; v += 2, w += stride) {
let vx = vertices[v], vy = vertices[v + 1];
worldVertices[w] = vx * a + vy * b + x;
worldVertices[w + 1] = vx * c + vy * d + y;
}
return;
}
let v = 0, skip = 0;
for (let i = 0; i < start; i += 2) {
let n = bones[v];
v += n + 1;
skip += n;
}
let skeletonBones = skeleton.bones;
if (deformArray.length == 0) {
for (let w = offset, b = skip * 3; w < count; w += stride) {
let wx = 0, wy = 0;
let n = bones[v++];
n += v;
for (; v < n; v++, b += 3) {
let bone = skeletonBones[bones[v]];
let vx = vertices[b], vy = vertices[b + 1], weight = vertices[b + 2];
wx += (vx * bone.a + vy * bone.b + bone.worldX) * weight;
wy += (vx * bone.c + vy * bone.d + bone.worldY) * weight;
}
worldVertices[w] = wx;
worldVertices[w + 1] = wy;
}
}
else {
let deform = deformArray;
for (let w = offset, b = skip * 3, f = skip << 1; w < count; w += stride) {
let wx = 0, wy = 0;
let n = bones[v++];
n += v;
for (; v < n; v++, b += 3, f += 2) {
let bone = skeletonBones[bones[v]];
let vx = vertices[b] + deform[f], vy = vertices[b + 1] + deform[f + 1], weight = vertices[b + 2];
wx += (vx * bone.a + vy * bone.b + bone.worldX) * weight;
wy += (vx * bone.c + vy * bone.d + bone.worldY) * weight;
}
worldVertices[w] = wx;
worldVertices[w + 1] = wy;
}
}
}
/** Does not copy id (generated) or name (set on construction). **/
copyTo(attachment) {
if (this.bones) {
attachment.bones = new Array(this.bones.length);
Utils.arrayCopy(this.bones, 0, attachment.bones, 0, this.bones.length);
}
else
attachment.bones = null;
if (this.vertices) {
attachment.vertices = Utils.newFloatArray(this.vertices.length);
Utils.arrayCopy(this.vertices, 0, attachment.vertices, 0, this.vertices.length);
}
attachment.worldVerticesLength = this.worldVerticesLength;
attachment.timelineAttachment = this.timelineAttachment;
}
}
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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 { Slot } from \"../Slot.js\";\nimport { NumberArrayLike, Utils } from \"../Utils.js\";\n\n/** The base class for all attachments. */\nexport abstract class Attachment {\n\tname: string;\n\n\tconstructor (name: string) {\n\t\tif (!name) throw new Error(\"name cannot be null.\");\n\t\tthis.name = name;\n\t}\n\n\tabstract copy (): Attachment;\n}\n\n/** Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by a slot's\n * {@link Slot#deform}. */\nexport abstract class VertexAttachment extends Attachment {\n\tprivate static nextID = 0;\n\n\t/** The unique ID for this attachment. */\n\tid = VertexAttachment.nextID++;\n\n\t/** The bones which affect the {@link #getVertices()}. The array entries are, for each vertex, the number of bones affecting\n\t * the vertex followed by that many bone indices, which is the index of the bone in {@link Skeleton#bones}. Will be null\n\t * if this attachment has no weights. */\n\tbones: Array<number> | null = null;\n\n\t/** The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are `x,y`\n\t * entries for each vertex. For a weighted attachment, the values are `x,y,weight` entries for each bone affecting\n\t * each vertex. */\n\tvertices: NumberArrayLike = [];\n\n\t/** The maximum number of world vertex values that can be output by\n\t * {@link #computeWorldVertices()} using the `count` parameter. */\n\tworldVerticesLength = 0;\n\n\t/** Timelines for the timeline attachment are also applied to this attachment.\n\t * May be null if no attachment-specific timelines should be applied. */\n\ttimelineAttachment: Attachment = this;\n\n\tconstructor (name: string) {\n\t\tsuper(name);\n\t}\n\n\t/** Transforms the attachment's local {@link #vertices} to world coordinates. If the slot's {@link Slot#deform} is\n\t * not empty, it is used to deform the vertices.\n\t *\n\t * See [World transforms](http://esotericsoftware.com/spine-runtime-skeletons#World-transforms) in the Spine\n\t * Runtimes Guide.\n\t * @param start The index of the first {@link #vertices} value to transform. Each vertex has 2 values, x and y.\n\t * @param count The number of world vertex values to output. Must be <= {@link #worldVerticesLength} - `start`.\n\t * @param worldVertices The output world vertices. Must have a length >= `offset` + `count` *\n\t *           `stride` / 2.\n\t * @param offset The `worldVertices` index to begin writing values.\n\t * @param stride The number of `worldVertices` entries between the value pairs written. */\n\tcomputeWorldVertices (slot: Slot, start: number, count: number, worldVertices: NumberArrayLike, offset: number, stride: number) {\n\t\tcount = offset + (count >> 1) * stride;\n\t\tlet skeleton = slot.bone.skeleton;\n\t\tlet deformArray = slot.deform;\n\t\tlet vertices = this.vertices;\n\t\tlet bones = this.bones;\n\t\tif (!bones) {\n\t\t\tif (deformArray.length > 0) vertices = deformArray;\n\t\t\tlet bone = slot.bone;\n\t\t\tlet x = bone.worldX;\n\t\t\tlet y = bone.worldY;\n\t\t\tlet a = bone.a, b = bone.b, c = bone.c, d = bone.d;\n\t\t\tfor (let v = start, w = offset; w < count; v += 2, w += stride) {\n\t\t\t\tlet vx = vertices[v], vy = vertices[v + 1];\n\t\t\t\tworldVertices[w] = vx * a + vy * b + x;\n\t\t\t\tworldVertices[w + 1] = vx * c + vy * d + y;\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\t\tlet v = 0, skip = 0;\n\t\tfor (let i = 0; i < start; i += 2) {\n\t\t\tlet n = bones[v];\n\t\t\tv += n + 1;\n\t\t\tskip += n;\n\t\t}\n\t\tlet skeletonBones = skeleton.bones;\n\t\tif (deformArray.length == 0) {\n\t\t\tfor (let w = offset, b = skip * 3; w < count; w += stride) {\n\t\t\t\tlet wx = 0, wy = 0;\n\t\t\t\tlet n = bones[v++];\n\t\t\t\tn += v;\n\t\t\t\tfor (; v < n; v++, b += 3) {\n\t\t\t\t\tlet bone = skeletonBones[bones[v]];\n\t\t\t\t\tlet vx = vertices[b], vy = vertices[b + 1], weight = vertices[b + 2];\n\t\t\t\t\twx += (vx * bone.a + vy * bone.b + bone.worldX) * weight;\n\t\t\t\t\twy += (vx * bone.c + vy * bone.d + bone.worldY) * weight;\n\t\t\t\t}\n\t\t\t\tworldVertices[w] = wx;\n\t\t\t\tworldVertices[w + 1] = wy;\n\t\t\t}\n\t\t} else {\n\t\t\tlet deform = deformArray;\n\t\t\tfor (let w = offset, b = skip * 3, f = skip << 1; w < count; w += stride) {\n\t\t\t\tlet wx = 0, wy = 0;\n\t\t\t\tlet n = bones[v++];\n\t\t\t\tn += v;\n\t\t\t\tfor (; v < n; v++, b += 3, f += 2) {\n\t\t\t\t\tlet bone = skeletonBones[bones[v]];\n\t\t\t\t\tlet vx = vertices[b] + deform[f], vy = vertices[b + 1] + deform[f + 1], weight = vertices[b + 2];\n\t\t\t\t\twx += (vx * bone.a + vy * bone.b + bone.worldX) * weight;\n\t\t\t\t\twy += (vx * bone.c + vy * bone.d + bone.worldY) * weight;\n\t\t\t\t}\n\t\t\t\tworldVertices[w] = wx;\n\t\t\t\tworldVertices[w + 1] = wy;\n\t\t\t}\n\t\t}\n\t}\n\n\t/** Does not copy id (generated) or name (set on construction). **/\n\tcopyTo (attachment: VertexAttachment) {\n\t\tif (this.bones) {\n\t\t\tattachment.bones = new Array<number>(this.bones.length);\n\t\t\tUtils.arrayCopy(this.bones, 0, attachment.bones, 0, this.bones.length);\n\t\t} else\n\t\t\tattachment.bones = null;\n\n\t\tif (this.vertices) {\n\t\t\tattachment.vertices = Utils.newFloatArray(this.vertices.length);\n\t\t\tUtils.arrayCopy(this.vertices, 0, attachment.vertices, 0, this.vertices.length);\n\t\t}\n\n\t\tattachment.worldVerticesLength = this.worldVerticesLength;\n\t\tattachment.timelineAttachment = this.timelineAttachment;\n\t}\n}\n"]}