Patch Normals

Calculates the normal vectors of a triangulated mesh (patch)

Description

This function calculates the normal vectors of a triangulated mesh such as used by the Matlab function patch.

It first calculates the normal vectors of all faces, and after that calculates the vertex normals from the face normals weighted by the angles of the faces.

The function is both implemented as a normal Matlab function and as a mex file in c-code (much faster)

Try the example ...

• Acknowledgements: This submission has inspired the following:; Compute STL Vertex Normals
• MATLAB release: MATLAB 7.8 (R2009a)

[Thomas Clark]

I was halfway through writing this very function, when I thought... 'I wonder whether this has been done'...

Glad I checked!

This is flawless, as far as I can tell (so far I've compiled and run the example).

Cheers Dirk-Jan :)

[Michael Fink]

works like a charm, thank you!

[fraisa1985 Youssef]

Thank you for your source code. But, i dont succeed to patch the different normal in some 3D mesh image. In fact, i was succeed to use you source code to have the normal vector of any facet but i don't succeed to patch him like the figure presented.
Can someone help me please how i can patch the differents normal in my 3D mesh image.
 

[fraisa1985 Youssef]

Thank you for your source code. But, i dont succeed to patch the different normal in some 3D mesh image. In fact, i was succeed to use you source code to have the normal vector of any facet but i don't succeed to patch him like the figure presented.
Can someone help me please how i can patch the differents normal in my 3D mesh image.