@esotericsoftware/spine-core
Version:
The official Spine Runtimes for the web.
172 lines • 27.7 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. Multiple {@link Skeleton} instances, slots, or skins can use the same attachments. */
export class Attachment {
static empty = [];
name;
/** Timelines for the timeline attachment are also applied to this attachment.
* @return May be null if no attachment-specific timelines should be applied. */
timelineAttachment;
/** Slots that can have attachments whose {@link timelineAttachment} is this attachment. */
timelineSlots = Attachment.empty;
constructor(name) {
if (!name)
throw new Error("name cannot be null.");
this.name = name;
this.timelineAttachment = this;
}
/** Returns true if the {@code slotIndex} or any {@link timelineSlots} have an attachment whose {@link timelineAttachment} is
* this attachment.
* @param slots The {@link Skeleton.slots}.
* @param slotIndex The timeline's primary slot index. */
isTimelineActive(slots, slotIndex, appliedPose) {
let slot = slots[slotIndex];
if (slot.bone.isActive()) {
const other = (appliedPose ? slot.getAppliedPose() : slot.getPose()).getAttachment();
if (other != null && other.timelineAttachment === this)
return true;
}
for (let i = 0, n = this.timelineSlots.length; i < n; i++) {
slot = slots[this.timelineSlots[i]];
if (!slot.bone.isActive())
continue;
const other = (appliedPose ? slot.getAppliedPose() : slot.getPose()).getAttachment();
if (other != null && other.timelineAttachment === this)
return true;
}
return false;
}
}
/** Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by
* {@link SlotPose.deform}. */
export class VertexAttachment extends Attachment {
static nextID = 0;
/** The unique ID for this attachment. */
id = VertexAttachment.nextID++;
/** The bones that affect the {@link vertices}. The entries are, for each vertex, the number of bones affecting the vertex
* followed by that many bone indices, which is {@link Skeleton.getBones} index. 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` triplets 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;
constructor(name) {
super(name);
}
/** Transforms the attachment's local {@link vertices} to world coordinates. If {@link SlotPose.getDeform} is not empty, it
* is used to deform the vertices.
*
* See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> 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(skeleton, slot, start, count, worldVertices, offset, stride) {
count = offset + (count >> 1) * stride;
const deformArray = slot.appliedPose.deform;
let vertices = this.vertices;
const bones = this.bones;
if (!bones) {
if (deformArray.length > 0)
vertices = deformArray;
const bone = slot.bone.appliedPose;
const x = bone.worldX;
const y = bone.worldY;
const a = bone.a, b = bone.b, c = bone.c, d = bone.d;
for (let v = start, w = offset; w < count; v += 2, w += stride) {
const 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) {
const n = bones[v];
v += n + 1;
skip += n;
}
const 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) {
const bone = skeletonBones[bones[v]].appliedPose;
const 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 {
const 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) {
const bone = skeletonBones[bones[v]].appliedPose;
const 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 = [];
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;
attachment.timelineSlots = this.timelineSlots;
}
}
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* Spine Runtimes License Agreement\n * Last updated April 5, 2025. 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 { Skeleton } from \"../Skeleton.js\";\nimport type { Slot } from \"../Slot.js\";\nimport type { SlotPose } from \"../SlotPose.js\";\nimport { type NumberArrayLike, Utils } from \"../Utils.js\";\n\n/** The base class for all attachments. Multiple {@link Skeleton} instances, slots, or skins can use the same attachments. */\nexport abstract class Attachment {\n\tprivate static readonly empty: number[] = [];\n\n\tname: string;\n\n\t/** Timelines for the timeline attachment are also applied to this attachment.\n\t * @return May be null if no attachment-specific timelines should be applied. */\n\ttimelineAttachment?: Attachment;\n\n\t/** Slots that can have attachments whose {@link timelineAttachment} is this attachment. */\n\ttimelineSlots: number[] = Attachment.empty;\n\n\tconstructor (name: string) {\n\t\tif (!name) throw new Error(\"name cannot be null.\");\n\t\tthis.name = name;\n\t\tthis.timelineAttachment = this;\n\t}\n\n\tabstract copy (): Attachment;\n\n\t/** Returns true if the {@code slotIndex} or any {@link timelineSlots} have an attachment whose {@link timelineAttachment} is\n\t * this attachment.\n\t * @param slots The {@link Skeleton.slots}.\n\t * @param slotIndex The timeline's primary slot index. */\n\tpublic isTimelineActive (slots: Slot[], slotIndex: number, appliedPose: boolean): boolean {\n\t\tlet slot = slots[slotIndex];\n\t\tif (slot.bone.isActive()) {\n\t\t\tconst other = (appliedPose ? slot.getAppliedPose() : slot.getPose()).getAttachment();\n\t\t\tif (other != null && other.timelineAttachment === this) return true;\n\t\t}\n\t\tfor (let i = 0, n = this.timelineSlots.length; i < n; i++) {\n\t\t\tslot = slots[this.timelineSlots[i]];\n\t\t\tif (!slot.bone.isActive()) continue;\n\t\t\tconst other = (appliedPose ? slot.getAppliedPose() : slot.getPose()).getAttachment();\n\t\t\tif (other != null && other.timelineAttachment === this) return true;\n\t\t}\n\t\treturn false;\n\t}\n}\n\n/** Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by\n * {@link SlotPose.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 that affect the {@link vertices}. The entries are, for each vertex, the number of bones affecting the vertex\n\t * followed by that many bone indices, which is {@link Skeleton.getBones} index. Null 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` triplets 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\tconstructor (name: string) {\n\t\tsuper(name);\n\t}\n\n\t/** Transforms the attachment's local {@link vertices} to world coordinates. If {@link SlotPose.getDeform} is not empty, it\n\t * is used to deform the vertices.\n\t *\n\t * See <a href=\"https://esotericsoftware.com/spine-runtime-skeletons#World-transforms\">World transforms</a> 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 (skeleton: Skeleton, slot: Slot, start: number, count: number, worldVertices: NumberArrayLike, offset: number,\n\t\tstride: number) {\n\n\t\tcount = offset + (count >> 1) * stride;\n\t\tconst deformArray = slot.appliedPose.deform;\n\t\tlet vertices = this.vertices;\n\t\tconst bones = this.bones;\n\t\tif (!bones) {\n\t\t\tif (deformArray.length > 0) vertices = deformArray;\n\t\t\tconst bone = slot.bone.appliedPose;\n\t\t\tconst x = bone.worldX;\n\t\t\tconst y = bone.worldY;\n\t\t\tconst 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\tconst 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\tconst n = bones[v];\n\t\t\tv += n + 1;\n\t\t\tskip += n;\n\t\t}\n\t\tconst 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\tconst bone = skeletonBones[bones[v]].appliedPose;\n\t\t\t\t\tconst 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\tconst 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\tconst bone = skeletonBones[bones[v]].appliedPose;\n\t\t\t\t\tconst 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 = [];\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\tattachment.timelineSlots = this.timelineSlots;\n\t}\n}\n"]}