Need help with mesh boolean in Matlab.

Hi I need help with implementing mesh boolean as shown in the attached figure. The mesh is in FV form.

[KSSV]

You have coordinates for cube and sphere, and you need the figure you shown? Or, you need to create both the meshes?

[Darpan Shidid]

No I have both the meshes. Just need to perform these (shown in figure) Boolean operations on them. Just wondering if I can get an idea about implementing that code.

Answer 1

[Sailesh Sidhwani]

I don't think there is a straight-forward function in MATLAB to do this. Please check out the following file-exchange submission. It mentions that it can perform "constructive solid geometry operations on meshes", which is same as what you are trying to achieve.

https://www.mathworks.com/matlabcentral/fileexchange/49692-gptoolbox

If you have any questions regarding the same, you can probably contact the author of this submission directly.

Answer 2

[DGM]

See also:

https://www.mathworks.com/matlabcentral/answers/2169008-are-there-matlab-functions-or-scripts-to-perform-boolean

https://www.mathworks.com/matlabcentral/answers/462934-make-valid-stl-file-from-overlapping-spheres

https://www.mathworks.com/matlabcentral/answers/561428-how-to-extract-intersection-between-two-3d-shapes

https://www.mathworks.com/matlabcentral/answers/2128176-cylinder-with-gyroid-infill#answer_1568116

While my own examples rely on external tools to do the CSG, I think most of the third-party CSG tools (like those in GPToolbox) rely on external libraries to do the work.

That said, I did recently run across this FEX submission which appears to do everything in m-code.

https://www.mathworks.com/matlabcentral/fileexchange/122502-surface-booleans

This is the final figure of its included demo:

That said, it's not really as straightforward to use as something like GPT's mesh_boolean() or my ridiculous scad_op() from #561428. Doesn't appear to be as simple as just throwing two sets of FV data into a single function call and getting FV data out. It's more of a demonstration of a whole process. Then again, if you can't compile MEX or install external software, it might be a viable option, and it can probably be wrapped up into a more comfortable form with a little further study.