I have been looking to do a 3D mesh for a shallow tunnel FE analysis. The output of mesh node orientation along the element should be counter clock wise direction. How and which material helps me best as I am a programming beginner?
For tetrahedral elements, the easiest way, if not the only way, in MATLAB is with DistMesh Package. It is really easy to use. I do not know the direction of orientation. However, that should be easy to fix in a few lines of code.