mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
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284 lines
11 KiB
TypeScript
284 lines
11 KiB
TypeScript
/******************************************************************************
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* Spine Runtimes License Agreement
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* Last updated May 1, 2019. Replaces all prior versions.
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*
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* Copyright (c) 2013-2019, Esoteric Software LLC
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*
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* Integration of the Spine Runtimes into software or otherwise creating
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* derivative works of the Spine Runtimes is permitted under the terms and
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* conditions of Section 2 of the Spine Editor License Agreement:
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* http://esotericsoftware.com/spine-editor-license
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*
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* Otherwise, it is permitted to integrate the Spine Runtimes into software
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* or otherwise create derivative works of the Spine Runtimes (collectively,
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* "Products"), provided that each user of the Products must obtain their own
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* Spine Editor license and redistribution of the Products in any form must
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* include this license and copyright notice.
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*
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* THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS
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* INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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module spine {
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export class Bone implements Updatable {
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data: BoneData;
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skeleton: Skeleton;
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parent: Bone;
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children = new Array<Bone>();
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x = 0; y = 0; rotation = 0; scaleX = 0; scaleY = 0; shearX = 0; shearY = 0;
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ax = 0; ay = 0; arotation = 0; ascaleX = 0; ascaleY = 0; ashearX = 0; ashearY = 0;
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appliedValid = false;
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a = 0; b = 0; worldX = 0;
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c = 0; d = 0; worldY = 0;
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sorted = false;
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/** @param parent May be null. */
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constructor (data: BoneData, skeleton: Skeleton, parent: Bone) {
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if (data == null) throw new Error("data cannot be null.");
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if (skeleton == null) throw new Error("skeleton cannot be null.");
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this.data = data;
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this.skeleton = skeleton;
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this.parent = parent;
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this.setToSetupPose();
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}
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/** Same as {@link #updateWorldTransform()}. This method exists for Bone to implement {@link Updatable}. */
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update () {
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this.updateWorldTransformWith(this.x, this.y, this.rotation, this.scaleX, this.scaleY, this.shearX, this.shearY);
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}
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/** Computes the world transform using the parent bone and this bone's local transform. */
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updateWorldTransform () {
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this.updateWorldTransformWith(this.x, this.y, this.rotation, this.scaleX, this.scaleY, this.shearX, this.shearY);
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}
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/** Computes the world transform using the parent bone and the specified local transform. */
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updateWorldTransformWith (x: number, y: number, rotation: number, scaleX: number, scaleY: number, shearX: number, shearY: number) {
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this.ax = x;
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this.ay = y;
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this.arotation = rotation;
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this.ascaleX = scaleX;
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this.ascaleY = scaleY;
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this.ashearX = shearX;
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this.ashearY = shearY;
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this.appliedValid = true;
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let parent = this.parent;
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if (parent == null) { // Root bone.
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let skeleton = this.skeleton;
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let rotationY = rotation + 90 + shearY;
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let sx = skeleton.scaleX;
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let sy = skeleton.scaleY;
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this.a = MathUtils.cosDeg(rotation + shearX) * scaleX * sx;
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this.b = MathUtils.cosDeg(rotationY) * scaleY * sx;
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this.c = MathUtils.sinDeg(rotation + shearX) * scaleX * sy;
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this.d = MathUtils.sinDeg(rotationY) * scaleY * sy;
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this.worldX = x * sx + skeleton.x;
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this.worldY = y * sy + skeleton.y;
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return;
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}
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let pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d;
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this.worldX = pa * x + pb * y + parent.worldX;
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this.worldY = pc * x + pd * y + parent.worldY;
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switch (this.data.transformMode) {
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case TransformMode.Normal: {
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let rotationY = rotation + 90 + shearY;
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let la = MathUtils.cosDeg(rotation + shearX) * scaleX;
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let lb = MathUtils.cosDeg(rotationY) * scaleY;
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let lc = MathUtils.sinDeg(rotation + shearX) * scaleX;
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let ld = MathUtils.sinDeg(rotationY) * scaleY;
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this.a = pa * la + pb * lc;
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this.b = pa * lb + pb * ld;
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this.c = pc * la + pd * lc;
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this.d = pc * lb + pd * ld;
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return;
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}
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case TransformMode.OnlyTranslation: {
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let rotationY = rotation + 90 + shearY;
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this.a = MathUtils.cosDeg(rotation + shearX) * scaleX;
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this.b = MathUtils.cosDeg(rotationY) * scaleY;
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this.c = MathUtils.sinDeg(rotation + shearX) * scaleX;
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this.d = MathUtils.sinDeg(rotationY) * scaleY;
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break;
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}
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case TransformMode.NoRotationOrReflection: {
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let s = pa * pa + pc * pc;
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let prx = 0;
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if (s > 0.0001) {
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s = Math.abs(pa * pd - pb * pc) / s;
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pb = pc * s;
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pd = pa * s;
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prx = Math.atan2(pc, pa) * MathUtils.radDeg;
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} else {
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pa = 0;
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pc = 0;
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prx = 90 - Math.atan2(pd, pb) * MathUtils.radDeg;
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}
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let rx = rotation + shearX - prx;
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let ry = rotation + shearY - prx + 90;
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let la = MathUtils.cosDeg(rx) * scaleX;
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let lb = MathUtils.cosDeg(ry) * scaleY;
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let lc = MathUtils.sinDeg(rx) * scaleX;
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let ld = MathUtils.sinDeg(ry) * scaleY;
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this.a = pa * la - pb * lc;
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this.b = pa * lb - pb * ld;
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this.c = pc * la + pd * lc;
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this.d = pc * lb + pd * ld;
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break;
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}
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case TransformMode.NoScale:
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case TransformMode.NoScaleOrReflection: {
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let cos = MathUtils.cosDeg(rotation);
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let sin = MathUtils.sinDeg(rotation);
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let za = (pa * cos + pb * sin) / this.skeleton.scaleX;
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let zc = (pc * cos + pd * sin) / this.skeleton.scaleY;
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let s = Math.sqrt(za * za + zc * zc);
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if (s > 0.00001) s = 1 / s;
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za *= s;
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zc *= s;
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s = Math.sqrt(za * za + zc * zc);
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if (this.data.transformMode == TransformMode.NoScale
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&& (pa * pd - pb * pc < 0) != (this.skeleton.scaleX < 0 != this.skeleton.scaleY < 0)) s = -s;
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let r = Math.PI / 2 + Math.atan2(zc, za);
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let zb = Math.cos(r) * s;
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let zd = Math.sin(r) * s;
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let la = MathUtils.cosDeg(shearX) * scaleX;
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let lb = MathUtils.cosDeg(90 + shearY) * scaleY;
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let lc = MathUtils.sinDeg(shearX) * scaleX;
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let ld = MathUtils.sinDeg(90 + shearY) * scaleY;
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this.a = za * la + zb * lc;
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this.b = za * lb + zb * ld;
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this.c = zc * la + zd * lc;
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this.d = zc * lb + zd * ld;
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break;
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}
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}
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this.a *= this.skeleton.scaleX;
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this.b *= this.skeleton.scaleX;
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this.c *= this.skeleton.scaleY;
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this.d *= this.skeleton.scaleY;
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}
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setToSetupPose () {
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let data = this.data;
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this.x = data.x;
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this.y = data.y;
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this.rotation = data.rotation;
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this.scaleX = data.scaleX;
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this.scaleY = data.scaleY;
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this.shearX = data.shearX;
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this.shearY = data.shearY;
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}
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getWorldRotationX () {
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return Math.atan2(this.c, this.a) * MathUtils.radDeg;
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}
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getWorldRotationY () {
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return Math.atan2(this.d, this.b) * MathUtils.radDeg;
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}
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getWorldScaleX () {
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return Math.sqrt(this.a * this.a + this.c * this.c);
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}
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getWorldScaleY () {
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return Math.sqrt(this.b * this.b + this.d * this.d);
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}
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/** Computes the individual applied transform values from the world transform. This can be useful to perform processing using
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* the applied transform after the world transform has been modified directly (eg, by a constraint).
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* <p>
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* Some information is ambiguous in the world transform, such as -1,-1 scale versus 180 rotation. */
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updateAppliedTransform () {
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this.appliedValid = true;
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let parent = this.parent;
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if (parent == null) {
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this.ax = this.worldX;
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this.ay = this.worldY;
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this.arotation = Math.atan2(this.c, this.a) * MathUtils.radDeg;
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this.ascaleX = Math.sqrt(this.a * this.a + this.c * this.c);
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this.ascaleY = Math.sqrt(this.b * this.b + this.d * this.d);
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this.ashearX = 0;
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this.ashearY = Math.atan2(this.a * this.b + this.c * this.d, this.a * this.d - this.b * this.c) * MathUtils.radDeg;
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return;
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}
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let pa = parent.a, pb = parent.b, pc = parent.c, pd = parent.d;
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let pid = 1 / (pa * pd - pb * pc);
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let dx = this.worldX - parent.worldX, dy = this.worldY - parent.worldY;
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this.ax = (dx * pd * pid - dy * pb * pid);
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this.ay = (dy * pa * pid - dx * pc * pid);
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let ia = pid * pd;
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let id = pid * pa;
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let ib = pid * pb;
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let ic = pid * pc;
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let ra = ia * this.a - ib * this.c;
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let rb = ia * this.b - ib * this.d;
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let rc = id * this.c - ic * this.a;
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let rd = id * this.d - ic * this.b;
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this.ashearX = 0;
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this.ascaleX = Math.sqrt(ra * ra + rc * rc);
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if (this.ascaleX > 0.0001) {
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let det = ra * rd - rb * rc;
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this.ascaleY = det / this.ascaleX;
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this.ashearY = Math.atan2(ra * rb + rc * rd, det) * MathUtils.radDeg;
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this.arotation = Math.atan2(rc, ra) * MathUtils.radDeg;
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} else {
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this.ascaleX = 0;
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this.ascaleY = Math.sqrt(rb * rb + rd * rd);
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this.ashearY = 0;
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this.arotation = 90 - Math.atan2(rd, rb) * MathUtils.radDeg;
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}
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}
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worldToLocal (world: Vector2) {
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let a = this.a, b = this.b, c = this.c, d = this.d;
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let invDet = 1 / (a * d - b * c);
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let x = world.x - this.worldX, y = world.y - this.worldY;
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world.x = (x * d * invDet - y * b * invDet);
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world.y = (y * a * invDet - x * c * invDet);
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return world;
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}
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localToWorld (local: Vector2) {
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let x = local.x, y = local.y;
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local.x = x * this.a + y * this.b + this.worldX;
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local.y = x * this.c + y * this.d + this.worldY;
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return local;
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}
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worldToLocalRotation (worldRotation: number) {
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let sin = MathUtils.sinDeg(worldRotation), cos = MathUtils.cosDeg(worldRotation);
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return Math.atan2(this.a * sin - this.c * cos, this.d * cos - this.b * sin) * MathUtils.radDeg + this.rotation - this.shearX;
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}
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localToWorldRotation (localRotation: number) {
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localRotation -= this.rotation - this.shearX;
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let sin = MathUtils.sinDeg(localRotation), cos = MathUtils.cosDeg(localRotation);
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return Math.atan2(cos * this.c + sin * this.d, cos * this.a + sin * this.b) * MathUtils.radDeg;
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}
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rotateWorld (degrees: number) {
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let a = this.a, b = this.b, c = this.c, d = this.d;
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let cos = MathUtils.cosDeg(degrees), sin = MathUtils.sinDeg(degrees);
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this.a = cos * a - sin * c;
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this.b = cos * b - sin * d;
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this.c = sin * a + cos * c;
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this.d = sin * b + cos * d;
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this.appliedValid = false;
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}
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}
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}
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