Meshes are not reproduced across Linux/Windows platforms

[fangq]

Reported by

Kevin G. McIver
Graduate Assistant, Honors College of Engineering
Sloan Indigenous Graduate Scholar
Mechanical Engineering

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Dr. Fang,

The error documented here is an inconsistency between the surfaces generated with CGAL using the meshresample tool when aggressively resampling a surface from an image. If the isosurface command is used to make the surface, the resample command is almost always inconsistent Windows to Linux. If you use a value of around .7 for the keepratio MATLAB to Linux consistency is possible using the v2s command and the ‘simplify’ subroutine.

Using the ‘cgalmesh’ method results in random numbers of faces and vertices based on the image every time, I saw a forum post of you from ~2015 attempting to solve that, I find myself wondering if you were ever able to solve it?

The surfboolean command, given the same input also still results in a slightly different surface mesh.

Another note, is that the surface smoothing function is also guilty of causing small differences given the same input Linux to Windows.

Thank you for this codebase, it’s exceptionally helpful, and provides great functionality for creating STLs from image geometry.

Best,
Kevin G. McIver

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Testing data
ExampleError.zip

[fangq]

Issue can be reproduced. issue is related to #4. Need to re-investigate.