@esotericsoftware/spine-core
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The official Spine Runtimes for the web.
217 lines • 33.7 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 { BoundingBoxAttachment } from "./attachments/BoundingBoxAttachment.js";
import { Pool, Utils } from "./Utils.js";
/** Collects each visible {@link BoundingBoxAttachment} and computes the world vertices for its polygon. The polygon vertices are
* provided along with convenience methods for doing hit detection. */
export class SkeletonBounds {
/** The left edge of the axis aligned bounding box. */
minX = 0;
/** The bottom edge of the axis aligned bounding box. */
minY = 0;
/** The right edge of the axis aligned bounding box. */
maxX = 0;
/** The top edge of the axis aligned bounding box. */
maxY = 0;
/** The visible bounding boxes. */
boundingBoxes = new Array();
/** The world vertices for the bounding box polygons. */
polygons = new Array();
polygonPool = new Pool(() => {
return Utils.newFloatArray(16);
});
/** Clears any previous polygons, finds all visible bounding box attachments, and computes the world vertices for each bounding
* box's polygon.
* @param updateAabb If true, the axis aligned bounding box containing all the polygons is computed. If false, the
* SkeletonBounds AABB methods will always return true. */
update(skeleton, updateAabb) {
if (!skeleton)
throw new Error("skeleton cannot be null.");
let boundingBoxes = this.boundingBoxes;
let polygons = this.polygons;
let polygonPool = this.polygonPool;
let slots = skeleton.slots;
let slotCount = slots.length;
boundingBoxes.length = 0;
polygonPool.freeAll(polygons);
polygons.length = 0;
for (let i = 0; i < slotCount; i++) {
let slot = slots[i];
if (!slot.bone.active)
continue;
let attachment = slot.getAttachment();
if (attachment instanceof BoundingBoxAttachment) {
let boundingBox = attachment;
boundingBoxes.push(boundingBox);
let polygon = polygonPool.obtain();
if (polygon.length != boundingBox.worldVerticesLength) {
polygon = Utils.newFloatArray(boundingBox.worldVerticesLength);
}
polygons.push(polygon);
boundingBox.computeWorldVertices(slot, 0, boundingBox.worldVerticesLength, polygon, 0, 2);
}
}
if (updateAabb) {
this.aabbCompute();
}
else {
this.minX = Number.POSITIVE_INFINITY;
this.minY = Number.POSITIVE_INFINITY;
this.maxX = Number.NEGATIVE_INFINITY;
this.maxY = Number.NEGATIVE_INFINITY;
}
}
aabbCompute() {
let minX = Number.POSITIVE_INFINITY, minY = Number.POSITIVE_INFINITY, maxX = Number.NEGATIVE_INFINITY, maxY = Number.NEGATIVE_INFINITY;
let polygons = this.polygons;
for (let i = 0, n = polygons.length; i < n; i++) {
let polygon = polygons[i];
let vertices = polygon;
for (let ii = 0, nn = polygon.length; ii < nn; ii += 2) {
let x = vertices[ii];
let y = vertices[ii + 1];
minX = Math.min(minX, x);
minY = Math.min(minY, y);
maxX = Math.max(maxX, x);
maxY = Math.max(maxY, y);
}
}
this.minX = minX;
this.minY = minY;
this.maxX = maxX;
this.maxY = maxY;
}
/** Returns true if the axis aligned bounding box contains the point. */
aabbContainsPoint(x, y) {
return x >= this.minX && x <= this.maxX && y >= this.minY && y <= this.maxY;
}
/** Returns true if the axis aligned bounding box intersects the line segment. */
aabbIntersectsSegment(x1, y1, x2, y2) {
let minX = this.minX;
let minY = this.minY;
let maxX = this.maxX;
let maxY = this.maxY;
if ((x1 <= minX && x2 <= minX) || (y1 <= minY && y2 <= minY) || (x1 >= maxX && x2 >= maxX) || (y1 >= maxY && y2 >= maxY))
return false;
let m = (y2 - y1) / (x2 - x1);
let y = m * (minX - x1) + y1;
if (y > minY && y < maxY)
return true;
y = m * (maxX - x1) + y1;
if (y > minY && y < maxY)
return true;
let x = (minY - y1) / m + x1;
if (x > minX && x < maxX)
return true;
x = (maxY - y1) / m + x1;
if (x > minX && x < maxX)
return true;
return false;
}
/** Returns true if the axis aligned bounding box intersects the axis aligned bounding box of the specified bounds. */
aabbIntersectsSkeleton(bounds) {
return this.minX < bounds.maxX && this.maxX > bounds.minX && this.minY < bounds.maxY && this.maxY > bounds.minY;
}
/** 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 {@link #aabbContainsPoint(float, float)} returns true. */
containsPoint(x, y) {
let polygons = this.polygons;
for (let i = 0, n = polygons.length; i < n; i++)
if (this.containsPointPolygon(polygons[i], x, y))
return this.boundingBoxes[i];
return null;
}
/** Returns true if the polygon contains the point. */
containsPointPolygon(polygon, x, y) {
let vertices = polygon;
let nn = polygon.length;
let prevIndex = nn - 2;
let inside = false;
for (let ii = 0; ii < nn; ii += 2) {
let vertexY = vertices[ii + 1];
let prevY = vertices[prevIndex + 1];
if ((vertexY < y && prevY >= y) || (prevY < y && vertexY >= y)) {
let vertexX = vertices[ii];
if (vertexX + (y - vertexY) / (prevY - vertexY) * (vertices[prevIndex] - vertexX) < x)
inside = !inside;
}
prevIndex = ii;
}
return inside;
}
/** 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 {@link #aabbIntersectsSegment()} returns
* true. */
intersectsSegment(x1, y1, x2, y2) {
let polygons = this.polygons;
for (let i = 0, n = polygons.length; i < n; i++)
if (this.intersectsSegmentPolygon(polygons[i], x1, y1, x2, y2))
return this.boundingBoxes[i];
return null;
}
/** Returns true if the polygon contains any part of the line segment. */
intersectsSegmentPolygon(polygon, x1, y1, x2, y2) {
let vertices = polygon;
let nn = polygon.length;
let width12 = x1 - x2, height12 = y1 - y2;
let det1 = x1 * y2 - y1 * x2;
let x3 = vertices[nn - 2], y3 = vertices[nn - 1];
for (let ii = 0; ii < nn; ii += 2) {
let x4 = vertices[ii], y4 = vertices[ii + 1];
let det2 = x3 * y4 - y3 * x4;
let width34 = x3 - x4, height34 = y3 - y4;
let det3 = width12 * height34 - height12 * width34;
let x = (det1 * width34 - width12 * det2) / det3;
if (((x >= x3 && x <= x4) || (x >= x4 && x <= x3)) && ((x >= x1 && x <= x2) || (x >= x2 && x <= x1))) {
let y = (det1 * height34 - height12 * det2) / det3;
if (((y >= y3 && y <= y4) || (y >= y4 && y <= y3)) && ((y >= y1 && y <= y2) || (y >= y2 && y <= y1)))
return true;
}
x3 = x4;
y3 = y4;
}
return false;
}
/** Returns the polygon for the specified bounding box, or null. */
getPolygon(boundingBox) {
if (!boundingBox)
throw new Error("boundingBox cannot be null.");
let index = this.boundingBoxes.indexOf(boundingBox);
return index == -1 ? null : this.polygons[index];
}
/** The width of the axis aligned bounding box. */
getWidth() {
return this.maxX - this.minX;
}
/** The height of the axis aligned bounding box. */
getHeight() {
return this.maxY - this.minY;
}
}
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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 { BoundingBoxAttachment } from \"./attachments/BoundingBoxAttachment.js\";\nimport { Skeleton } from \"./Skeleton.js\";\nimport { NumberArrayLike, Pool, Utils } from \"./Utils.js\";\n\n/** Collects each visible {@link BoundingBoxAttachment} and computes the world vertices for its polygon. The polygon vertices are\n * provided along with convenience methods for doing hit detection. */\nexport class SkeletonBounds {\n\n\t/** The left edge of the axis aligned bounding box. */\n\tminX = 0;\n\n\t/** The bottom edge of the axis aligned bounding box. */\n\tminY = 0;\n\n\t/** The right edge of the axis aligned bounding box. */\n\tmaxX = 0;\n\n\t/** The top edge of the axis aligned bounding box. */\n\tmaxY = 0;\n\n\t/** The visible bounding boxes. */\n\tboundingBoxes = new Array<BoundingBoxAttachment>();\n\n\t/** The world vertices for the bounding box polygons. */\n\tpolygons = new Array<NumberArrayLike>();\n\n\tprivate polygonPool = new Pool<NumberArrayLike>(() => {\n\t\treturn Utils.newFloatArray(16);\n\t});\n\n\t/** Clears any previous polygons, finds all visible bounding box attachments, and computes the world vertices for each bounding\n\t * box's polygon.\n\t * @param updateAabb If true, the axis aligned bounding box containing all the polygons is computed. If false, the\n\t *           SkeletonBounds AABB methods will always return true. */\n\tupdate (skeleton: Skeleton, updateAabb: boolean) {\n\t\tif (!skeleton) throw new Error(\"skeleton cannot be null.\");\n\t\tlet boundingBoxes = this.boundingBoxes;\n\t\tlet polygons = this.polygons;\n\t\tlet polygonPool = this.polygonPool;\n\t\tlet slots = skeleton.slots;\n\t\tlet slotCount = slots.length;\n\n\t\tboundingBoxes.length = 0;\n\t\tpolygonPool.freeAll(polygons);\n\t\tpolygons.length = 0;\n\n\t\tfor (let i = 0; i < slotCount; i++) {\n\t\t\tlet slot = slots[i];\n\t\t\tif (!slot.bone.active) continue;\n\t\t\tlet attachment = slot.getAttachment();\n\t\t\tif (attachment instanceof BoundingBoxAttachment) {\n\t\t\t\tlet boundingBox = attachment as BoundingBoxAttachment;\n\t\t\t\tboundingBoxes.push(boundingBox);\n\n\t\t\t\tlet polygon = polygonPool.obtain();\n\t\t\t\tif (polygon.length != boundingBox.worldVerticesLength) {\n\t\t\t\t\tpolygon = Utils.newFloatArray(boundingBox.worldVerticesLength);\n\t\t\t\t}\n\t\t\t\tpolygons.push(polygon);\n\t\t\t\tboundingBox.computeWorldVertices(slot, 0, boundingBox.worldVerticesLength, polygon, 0, 2);\n\t\t\t}\n\t\t}\n\n\t\tif (updateAabb) {\n\t\t\tthis.aabbCompute();\n\t\t} else {\n\t\t\tthis.minX = Number.POSITIVE_INFINITY;\n\t\t\tthis.minY = Number.POSITIVE_INFINITY;\n\t\t\tthis.maxX = Number.NEGATIVE_INFINITY;\n\t\t\tthis.maxY = Number.NEGATIVE_INFINITY;\n\t\t}\n\t}\n\n\taabbCompute () {\n\t\tlet minX = Number.POSITIVE_INFINITY, minY = Number.POSITIVE_INFINITY, maxX = Number.NEGATIVE_INFINITY, maxY = Number.NEGATIVE_INFINITY;\n\t\tlet polygons = this.polygons;\n\t\tfor (let i = 0, n = polygons.length; i < n; i++) {\n\t\t\tlet polygon = polygons[i];\n\t\t\tlet vertices = polygon;\n\t\t\tfor (let ii = 0, nn = polygon.length; ii < nn; ii += 2) {\n\t\t\t\tlet x = vertices[ii];\n\t\t\t\tlet y = vertices[ii + 1];\n\t\t\t\tminX = Math.min(minX, x);\n\t\t\t\tminY = Math.min(minY, y);\n\t\t\t\tmaxX = Math.max(maxX, x);\n\t\t\t\tmaxY = Math.max(maxY, y);\n\t\t\t}\n\t\t}\n\t\tthis.minX = minX;\n\t\tthis.minY = minY;\n\t\tthis.maxX = maxX;\n\t\tthis.maxY = maxY;\n\t}\n\n\t/** Returns true if the axis aligned bounding box contains the point. */\n\taabbContainsPoint (x: number, y: number) {\n\t\treturn x >= this.minX && x <= this.maxX && y >= this.minY && y <= this.maxY;\n\t}\n\n\t/** Returns true if the axis aligned bounding box intersects the line segment. */\n\taabbIntersectsSegment (x1: number, y1: number, x2: number, y2: number) {\n\t\tlet minX = this.minX;\n\t\tlet minY = this.minY;\n\t\tlet maxX = this.maxX;\n\t\tlet maxY = this.maxY;\n\t\tif ((x1 <= minX && x2 <= minX) || (y1 <= minY && y2 <= minY) || (x1 >= maxX && x2 >= maxX) || (y1 >= maxY && y2 >= maxY))\n\t\t\treturn false;\n\t\tlet m = (y2 - y1) / (x2 - x1);\n\t\tlet y = m * (minX - x1) + y1;\n\t\tif (y > minY && y < maxY) return true;\n\t\ty = m * (maxX - x1) + y1;\n\t\tif (y > minY && y < maxY) return true;\n\t\tlet x = (minY - y1) / m + x1;\n\t\tif (x > minX && x < maxX) return true;\n\t\tx = (maxY - y1) / m + x1;\n\t\tif (x > minX && x < maxX) return true;\n\t\treturn false;\n\t}\n\n\t/** Returns true if the axis aligned bounding box intersects the axis aligned bounding box of the specified bounds. */\n\taabbIntersectsSkeleton (bounds: SkeletonBounds) {\n\t\treturn this.minX < bounds.maxX && this.maxX > bounds.minX && this.minY < bounds.maxY && this.maxY > bounds.minY;\n\t}\n\n\t/** Returns the first bounding box attachment that contains the point, or null. When doing many checks, it is usually more\n\t * efficient to only call this method if {@link #aabbContainsPoint(float, float)} returns true. */\n\tcontainsPoint (x: number, y: number): BoundingBoxAttachment | null {\n\t\tlet polygons = this.polygons;\n\t\tfor (let i = 0, n = polygons.length; i < n; i++)\n\t\t\tif (this.containsPointPolygon(polygons[i], x, y)) return this.boundingBoxes[i];\n\t\treturn null;\n\t}\n\n\t/** Returns true if the polygon contains the point. */\n\tcontainsPointPolygon (polygon: NumberArrayLike, x: number, y: number) {\n\t\tlet vertices = polygon;\n\t\tlet nn = polygon.length;\n\n\t\tlet prevIndex = nn - 2;\n\t\tlet inside = false;\n\t\tfor (let ii = 0; ii < nn; ii += 2) {\n\t\t\tlet vertexY = vertices[ii + 1];\n\t\t\tlet prevY = vertices[prevIndex + 1];\n\t\t\tif ((vertexY < y && prevY >= y) || (prevY < y && vertexY >= y)) {\n\t\t\t\tlet vertexX = vertices[ii];\n\t\t\t\tif (vertexX + (y - vertexY) / (prevY - vertexY) * (vertices[prevIndex] - vertexX) < x) inside = !inside;\n\t\t\t}\n\t\t\tprevIndex = ii;\n\t\t}\n\t\treturn inside;\n\t}\n\n\t/** Returns the first bounding box attachment that contains any part of the line segment, or null. When doing many checks, it\n\t * is usually more efficient to only call this method if {@link #aabbIntersectsSegment()} returns\n\t * true. */\n\tintersectsSegment (x1: number, y1: number, x2: number, y2: number) {\n\t\tlet polygons = this.polygons;\n\t\tfor (let i = 0, n = polygons.length; i < n; i++)\n\t\t\tif (this.intersectsSegmentPolygon(polygons[i], x1, y1, x2, y2)) return this.boundingBoxes[i];\n\t\treturn null;\n\t}\n\n\t/** Returns true if the polygon contains any part of the line segment. */\n\tintersectsSegmentPolygon (polygon: NumberArrayLike, x1: number, y1: number, x2: number, y2: number) {\n\t\tlet vertices = polygon;\n\t\tlet nn = polygon.length;\n\n\t\tlet width12 = x1 - x2, height12 = y1 - y2;\n\t\tlet det1 = x1 * y2 - y1 * x2;\n\t\tlet x3 = vertices[nn - 2], y3 = vertices[nn - 1];\n\t\tfor (let ii = 0; ii < nn; ii += 2) {\n\t\t\tlet x4 = vertices[ii], y4 = vertices[ii + 1];\n\t\t\tlet det2 = x3 * y4 - y3 * x4;\n\t\t\tlet width34 = x3 - x4, height34 = y3 - y4;\n\t\t\tlet det3 = width12 * height34 - height12 * width34;\n\t\t\tlet x = (det1 * width34 - width12 * det2) / det3;\n\t\t\tif (((x >= x3 && x <= x4) || (x >= x4 && x <= x3)) && ((x >= x1 && x <= x2) || (x >= x2 && x <= x1))) {\n\t\t\t\tlet y = (det1 * height34 - height12 * det2) / det3;\n\t\t\t\tif (((y >= y3 && y <= y4) || (y >= y4 && y <= y3)) && ((y >= y1 && y <= y2) || (y >= y2 && y <= y1))) return true;\n\t\t\t}\n\t\t\tx3 = x4;\n\t\t\ty3 = y4;\n\t\t}\n\t\treturn false;\n\t}\n\n\t/** Returns the polygon for the specified bounding box, or null. */\n\tgetPolygon (boundingBox: BoundingBoxAttachment) {\n\t\tif (!boundingBox) throw new Error(\"boundingBox cannot be null.\");\n\t\tlet index = this.boundingBoxes.indexOf(boundingBox);\n\t\treturn index == -1 ? null : this.polygons[index];\n\t}\n\n\t/** The width of the axis aligned bounding box. */\n\tgetWidth () {\n\t\treturn this.maxX - this.minX;\n\t}\n\n\t/** The height of the axis aligned bounding box. */\n\tgetHeight () {\n\t\treturn this.maxY - this.minY;\n\t}\n}\n"]}