179 lines
3.0 KiB
JavaScript
179 lines
3.0 KiB
JavaScript
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import { Matrix4 } from '../math/Matrix4.js';
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/**
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* @author mikael emtinger / http://gomo.se/
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* @author alteredq / http://alteredqualia.com/
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* @author michael guerrero / http://realitymeltdown.com
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* @author ikerr / http://verold.com
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*/
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function Skeleton( bones, boneInverses ) {
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// copy the bone array
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bones = bones || [];
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this.bones = bones.slice( 0 );
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this.boneMatrices = new Float32Array( this.bones.length * 16 );
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// use the supplied bone inverses or calculate the inverses
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if ( boneInverses === undefined ) {
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this.calculateInverses();
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} else {
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if ( this.bones.length === boneInverses.length ) {
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this.boneInverses = boneInverses.slice( 0 );
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} else {
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console.warn( 'THREE.Skeleton boneInverses is the wrong length.' );
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this.boneInverses = [];
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for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
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this.boneInverses.push( new Matrix4() );
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}
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}
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}
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}
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Object.assign( Skeleton.prototype, {
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calculateInverses: function () {
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this.boneInverses = [];
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for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
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var inverse = new Matrix4();
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if ( this.bones[ i ] ) {
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inverse.getInverse( this.bones[ i ].matrixWorld );
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}
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this.boneInverses.push( inverse );
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}
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},
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pose: function () {
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var bone, i, il;
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// recover the bind-time world matrices
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for ( i = 0, il = this.bones.length; i < il; i ++ ) {
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bone = this.bones[ i ];
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if ( bone ) {
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bone.matrixWorld.getInverse( this.boneInverses[ i ] );
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}
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}
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// compute the local matrices, positions, rotations and scales
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for ( i = 0, il = this.bones.length; i < il; i ++ ) {
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bone = this.bones[ i ];
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if ( bone ) {
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if ( bone.parent && bone.parent.isBone ) {
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bone.matrix.getInverse( bone.parent.matrixWorld );
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bone.matrix.multiply( bone.matrixWorld );
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} else {
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bone.matrix.copy( bone.matrixWorld );
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}
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bone.matrix.decompose( bone.position, bone.quaternion, bone.scale );
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}
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}
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},
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update: ( function () {
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var offsetMatrix = new Matrix4();
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var identityMatrix = new Matrix4();
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return function update() {
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var bones = this.bones;
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var boneInverses = this.boneInverses;
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var boneMatrices = this.boneMatrices;
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var boneTexture = this.boneTexture;
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// flatten bone matrices to array
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for ( var i = 0, il = bones.length; i < il; i ++ ) {
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// compute the offset between the current and the original transform
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var matrix = bones[ i ] ? bones[ i ].matrixWorld : identityMatrix;
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offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );
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offsetMatrix.toArray( boneMatrices, i * 16 );
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}
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if ( boneTexture !== undefined ) {
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boneTexture.needsUpdate = true;
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}
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};
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} )(),
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clone: function () {
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return new Skeleton( this.bones, this.boneInverses );
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},
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getBoneByName: function ( name ) {
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for ( var i = 0, il = this.bones.length; i < il; i ++ ) {
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var bone = this.bones[ i ];
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if ( bone.name === name ) {
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return bone;
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}
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}
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return undefined;
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}
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} );
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export { Skeleton };
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