ros3d.js中动态改变pointCloud2点云数据的参数

          ros3d.js中动态改变pointCloud2点云数据的参数

ros3d.js 改造

	class Points extends THREE.Object3D {/*** A set of points. Used by PointCloud2 and LaserScan.** @constructor* @param options - object with following keys:**  * tfClient - the TF client handle to use*  * rootObject (optional) - the root object to add this marker to use for the points.*  * max_pts (optional) - number of points to draw (default: 10000)*  * pointRatio (optional) - point subsampling ratio (default: 1, no subsampling)*  * messageRatio (optional) - message subsampling ratio (default: 1, no subsampling)*  * material (optional) - a material object or an option to construct a PointsMaterial.*  * colorsrc (op