Get the indices of surface triangle from a tetrahedral mesh.

I used the function generateMesh() to generate a 3D tetrahedral mesh (quadratic model). I want to create a matrix TRI. Each row of TRI contains indices into the X,Y, and Z vertex vectors to define a single triangular face. I want to use this matrix TRI to define a triangulted surface of the origonal mesh, so that I can use other function such as tri contour to get a contour plot of the tetrahedral mesh. Is there anyway to do that? I have browsed a lot of tools but none of them provide a way to procduce the matrix TRI.

Below is my code of generation of a typical 3D tetrahedral mesh.

model = createpde;
importGeometry(model, 'virus_3.stl');
figure(1)
pdegplot(model,'FaceLabels','on')
mesh = generateMesh(model);

Below is my meshdata. If anyone also happens to know a easy way to make a contour out of this mesh, it will be very helpful as well.

Answer 1

[Jyotsna Talluri]

Hi,

Refer to the below link in file exchange

https://www.mathworks.com/matlabcentral/fileexchange/10408-contours-for-triangular-grids

Hope it helps