Hi,all I wrote the lines.vtk in binary format and the points.vtk in ASCII format according to www.vtk.org/VTK/img/file-formats.pdf. The attached pictures show the process how I get the tubes(closed surfaces which I thought the tubes are) ,then I want to find out the points which are inside the tubes (blue area in the view3), but I don't know how to work it out. Now I'm desperate for achieving my aim, so please help me if you know how to do it ! Thank you in advance ! pan hengxing
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