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site/game/node_modules/three/src/helpers/SkeletonHelper.js

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+import { LineSegments } from '../objects/LineSegments.js';
+import { Matrix4 } from '../math/Matrix4.js';
+import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
+import { Color } from '../math/Color.js';
+import { Vector3 } from '../math/Vector3.js';
+import { BufferGeometry } from '../core/BufferGeometry.js';
+import { Float32BufferAttribute } from '../core/BufferAttribute.js';
+
+const _vector = /*@__PURE__*/ new Vector3();
+const _boneMatrix = /*@__PURE__*/ new Matrix4();
+const _matrixWorldInv = /*@__PURE__*/ new Matrix4();
+
+
+class SkeletonHelper extends LineSegments {
+
+	constructor( object ) {
+
+		const bones = getBoneList( object );
+
+		const geometry = new BufferGeometry();
+
+		const vertices = [];
+		const colors = [];
+
+		const color1 = new Color( 0, 0, 1 );
+		const color2 = new Color( 0, 1, 0 );
+
+		for ( let i = 0; i < bones.length; i ++ ) {
+
+			const bone = bones[ i ];
+
+			if ( bone.parent && bone.parent.isBone ) {
+
+				vertices.push( 0, 0, 0 );
+				vertices.push( 0, 0, 0 );
+				colors.push( color1.r, color1.g, color1.b );
+				colors.push( color2.r, color2.g, color2.b );
+
+			}
+
+		}
+
+		geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
+		geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
+
+		const material = new LineBasicMaterial( { vertexColors: true, depthTest: false, depthWrite: false, toneMapped: false, transparent: true } );
+
+		super( geometry, material );
+
+		this.isSkeletonHelper = true;
+
+		this.type = 'SkeletonHelper';
+
+		this.root = object;
+		this.bones = bones;
+
+		this.matrix = object.matrixWorld;
+		this.matrixAutoUpdate = false;
+
+	}
+
+	updateMatrixWorld( force ) {
+
+		const bones = this.bones;
+
+		const geometry = this.geometry;
+		const position = geometry.getAttribute( 'position' );
+
+		_matrixWorldInv.copy( this.root.matrixWorld ).invert();
+
+		for ( let i = 0, j = 0; i < bones.length; i ++ ) {
+
+			const bone = bones[ i ];
+
+			if ( bone.parent && bone.parent.isBone ) {
+
+				_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.matrixWorld );
+				_vector.setFromMatrixPosition( _boneMatrix );
+				position.setXYZ( j, _vector.x, _vector.y, _vector.z );
+
+				_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.parent.matrixWorld );
+				_vector.setFromMatrixPosition( _boneMatrix );
+				position.setXYZ( j + 1, _vector.x, _vector.y, _vector.z );
+
+				j += 2;
+
+			}
+
+		}
+
+		geometry.getAttribute( 'position' ).needsUpdate = true;
+
+		super.updateMatrixWorld( force );
+
+	}
+
+	dispose() {
+
+		this.geometry.dispose();
+		this.material.dispose();
+
+	}
+
+}
+
+
+function getBoneList( object ) {
+
+	const boneList = [];
+
+	if ( object.isBone === true ) {
+
+		boneList.push( object );
+
+	}
+
+	for ( let i = 0; i < object.children.length; i ++ ) {
+
+		boneList.push.apply( boneList, getBoneList( object.children[ i ] ) );
+
+	}
+
+	return boneList;
+
+}
+
+
+export { SkeletonHelper };