/**
* @author WestLangley / http://github.com/WestLangley
*
*/
const THREE = require('three');
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;
}
} );
export default THREE.LineSegments2;