<p dir="ltr">Hello</p>
<p dir="ltr">I am looking for advice on VTK, I need to import stl files and then for a given set of spherical coordinates get a list of all visible triangles of a subset of the imported files. I can then use the vertices and normals of the triangles for aperture processing, but while I have no problem with importing stl files and rendering them, I don't have a fast way of isolating the visible triangles for a given angle. I read the example on the wiki, and was wondering if you could give me your advice. I don't want to display it each time, as I need to extract the cell id list of visible triangles for a large set of spherical coordinates.</p>
<p dir="ltr">I can then use the cell ids to pass the polygons to my function for processing for area, orientation and other things.</p>
<p dir="ltr">Many Thanks for your time</p>
<p dir="ltr">Tim</p>