Geomview For Windows?
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Re: [Update REQ 6717]: Geomview
> I just started using Geomview and think it's a great piece of software! Thanks! That's always nice to hear... > I > do have a question, and hope this is the right place to send my questions. > I read in some geometry as an OFF file and displayed it. The geometry is a > mesh of triangles representing an anatomical structure which I am > interested in for my research. I wish to extract and save the contour > formed by the intersection of this geometry and the surface; Which surface? > the contour > should be represented as a polyline. Is this task possible in Geomview? It depends: If the surface you mean is, say, a simple plane -- sort of a virtual microtome for your anatomical structure -- then yes, you can do something like this using "clip" (command-line program) or "Ginsu" (interactive module). Then, I believe "bdy" (Boundary) could be used to trace an outline of a clipped edge. (You could also use "clip" to extract a thin slice between two parallel planes separated by a short distance, though this would yield a collection of polygons rather than a polyline.) If you're trying to find the intersection of two arbitrary surfaces, then there's no tool provided for doing that that's packaged with geomview. However, I have written a program for another project that does most of the necessary work: it takes a triangulated OFF object and finds all self-intersections, so you could combine the two surfaces into one OFF file and run it. Its output is currently an unordered list of fragments of the self-intersection curve(s); I have other code which sorts these out into connected arcs and loops, though it doesn't currently write its results to a file. If this is the kind of thing you need, let me know and I can package it up. Stuart Levy ort
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