/** * @author WestLangley / http://github.com/WestLangley * */ THREE.LineSegments2 = function ( geometry, material ) { THREE.Mesh.call( this ); this.type = 'LineSegments2'; this.geometry = geometry !== undefined ? geometry : new THREE.LineSegmentsGeometry(); this.material = material !== undefined ? material : new THREE.LineMaterial( { color: Math.random() * 0xffffff } ); }; THREE.LineSegments2.prototype = Object.assign( Object.create( THREE.Mesh.prototype ), { constructor: THREE.LineSegments2, isLineSegments2: true, computeLineDistances: ( function () { // for backwards-compatability, but could be a method of LineSegmentsGeometry... var start = new THREE.Vector3(); var end = new THREE.Vector3(); return function computeLineDistances() { var geometry = this.geometry; var instanceStart = geometry.attributes.instanceStart; var instanceEnd = geometry.attributes.instanceEnd; var lineDistances = new Float32Array( 2 * instanceStart.data.count ); for ( var i = 0, j = 0, l = instanceStart.data.count; i < l; i ++, j += 2 ) { start.fromBufferAttribute( instanceStart, i ); end.fromBufferAttribute( instanceEnd, i ); lineDistances[ j ] = ( j === 0 ) ? 0 : lineDistances[ j - 1 ]; lineDistances[ j + 1 ] = lineDistances[ j ] + start.distanceTo( end ); } var instanceDistanceBuffer = new THREE.InstancedInterleavedBuffer( lineDistances, 2, 1 ); // d0, d1 geometry.addAttribute( 'instanceDistanceStart', new THREE.InterleavedBufferAttribute( instanceDistanceBuffer, 1, 0 ) ); // d0 geometry.addAttribute( 'instanceDistanceEnd', new THREE.InterleavedBufferAttribute( instanceDistanceBuffer, 1, 1 ) ); // d1 return this; }; }() ), copy: function ( source ) { // todo return this; } } );