I want to skeletize the surface mesh. For that I need to export .STL from Solidworks and then convert that into .OFF file to be able to use it in CGAL library for skeletonzation. How can I do this?
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2$\begingroup$ Look at MeshLab it imports and exports both .stl and .off I have not used .off so not familiar on how well MeshLab handles them. MeshLab is open source. $\endgroup$ – spicetraders Nov 21 '16 at 17:05
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If you can handle a single intermediate step, you may find that OpenSCAD will perform as required. As a test, I created a cube 10 x 20 x 5 within OpenSCAD. I kept the model simple, hoping the code generated would be short.
The results:
OFF
8 12 0
0 0 5
10 0 5
10 20 5
0 20 0
0 0 0
10 0 0
10 20 0
0 20 5
3 4 5 1
3 0 4 1
3 0 7 4
3 4 7 3
3 0 1 2
3 7 0 2
3 3 6 4
3 4 6 5
3 5 6 2
3 1 5 2
3 7 2 3
3 3 2 6
In your example, it would be necessary to use the import_stl feature of OpenSCAD, then render the model. Once rendered, use File, Export, Export as OFF to create the file you need.
I cannot provide certainty of the exported code, however, as I am not familiar with the format you seek.
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I would suggest using Meshlab. You can convert from .stl to .off and you can try other operations for quick results too, instead of diving to code for mesh manipulation.
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There is the Free online tool to convert STL to OFF within second: https://cadcook.com/stl-off/
I used it for stl conversations..
