PCLVisualizer可视化类

http://www.cnblogs.com/li-yao7758258/p/6445127.html

pcl_viewer

https://segmentfault.com/a/1190000006685118

pcl中之画线-1

https://segmentfault.com/n/1330000006645681

pcl计算点云法向，并对其进行可视化

https://segmentfault.com/n/1330000005761876