three.js/src/renderers/renderables/RenderableLine.js

/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableLine = function () {

	this.z = null;

	this.v1 = new THREE.RenderableVertex();
	this.v2 = new THREE.RenderableVertex();

	this.vertexColors = [ new THREE.Color(), new THREE.Color()];
	this.material = null;

};