Displaying STL file with colored facets

I have an STL file of a part for 3D printing, for each facet I had calculated the surface roughness.How to display the STL file with the facets colored according to the value of its specific surface roughness? I want to get something like that

Answer 1

[Ahmet Cecen]

 p = patch('faces',F,'vertices',V,'FaceColor',[0.8 0.8 1.0],'FaceLighting','gouraud');

Pass the surface roughness vector as the argument to the 'FaceColor' option.

http://www.mathworks.com/help/matlab/ref/patch.html#busd821-1

[Mohammad Ismail]

Hi I want to import complext geometry from solid work the command readstl did not work. Could you please help me in that

[Sleh Eddine Brika]

Hi, it worked perfectly for me and I tried it with several complex parts. Maybe be you can try this function https://www.mathworks.com/matlabcentral/fileexchange/22409-stl-file-reader. And if you still have problems, you may try importing your CAD in IGES format using this function https://www.mathworks.com/matlabcentral/fileexchange/13253-iges-toolbox Could you please put your code.

[DGM]

Since R2018b, MATLAB has built-in STL tools. You don't need to download anything.

stlread

stlwrite

For legacy versions still needing third-party tools, I'd strongly recommend these tools over #22409 or the decoders in #13253. This explains why.

If you use #22409 in a modern installation, you will shadow the inbuilt tools and likely cause problems for yourself unless you rename it.

I'll note that there aren't any third-party STL decoders that I know of called exactly "readstl()", but there are at least three that are some sequence of "read" and "stl" with variations of case and underscores. The most similarly-named of the three should not be expected to actually work reliably.