/**
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* @author WestLangley / http://github.com/WestLangley
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*
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*/
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THREE.Wireframe = function ( geometry, material ) {
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THREE.Mesh.call( this );
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this.type = 'Wireframe';
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this.geometry = geometry !== undefined ? geometry : new THREE.LineSegmentsGeometry();
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this.material = material !== undefined ? material : new THREE.LineMaterial( { color: Math.random() * 0xffffff } );
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};
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THREE.Wireframe.prototype = Object.assign( Object.create( THREE.Mesh.prototype ), {
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constructor: THREE.Wireframe,
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isWireframe: true,
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computeLineDistances: ( function () { // for backwards-compatability, but could be a method of LineSegmentsGeometry...
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var start = new THREE.Vector3();
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var end = new THREE.Vector3();
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return function computeLineDistances() {
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var geometry = this.geometry;
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var instanceStart = geometry.attributes.instanceStart;
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var instanceEnd = geometry.attributes.instanceEnd;
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var lineDistances = new Float32Array( 2 * instanceStart.data.count );
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for ( var i = 0, j = 0, l = instanceStart.data.count; i < l; i ++, j += 2 ) {
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start.fromBufferAttribute( instanceStart, i );
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end.fromBufferAttribute( instanceEnd, i );
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lineDistances[ j ] = ( j === 0 ) ? 0 : lineDistances[ j - 1 ];
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lineDistances[ j + 1 ] = lineDistances[ j ] + start.distanceTo( end );
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}
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var instanceDistanceBuffer = new THREE.InstancedInterleavedBuffer( lineDistances, 2, 1 ); // d0, d1
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geometry.setAttribute( 'instanceDistanceStart', new THREE.InterleavedBufferAttribute( instanceDistanceBuffer, 1, 0 ) ); // d0
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geometry.setAttribute( 'instanceDistanceEnd', new THREE.InterleavedBufferAttribute( instanceDistanceBuffer, 1, 1 ) ); // d1
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return this;
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};
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}() ),
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copy: function ( /* source */ ) {
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// todo
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return this;
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}
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} );
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