three.js/src/materials/LineBasicMaterial.js

/**
 * @author mr.doob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  opacity: <float>,
 
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 
 *  linewidth: <float>,
 *  linecap: "round",  
 *  linejoin: "round",
 
 *  vertexColors: <bool>
 * }
 */

THREE.LineBasicMaterial = function ( parameters ) {

	THREE.Material.call( this, parameters );

	parameters = parameters || {};

	this.color = parameters.color !== undefined ? new THREE.Color( parameters.color ) : new THREE.Color( 0xffffff );

	this.linewidth = parameters.linewidth !== undefined ? parameters.linewidth : 1;
	this.linecap = parameters.linecap !== undefined ? parameters.linecap : 'round';
	this.linejoin = parameters.linejoin !== undefined ? parameters.linejoin : 'round';

	this.vertexColors = parameters.vertexColors ? parameters.vertexColors : false;

};

THREE.LineBasicMaterial.prototype = new THREE.Material();
THREE.LineBasicMaterial.prototype.constructor = THREE.LineBasicMaterial;