Before the export, the Tri_Surface file can be used in Matlab for visualization, some calculations or modifications. Thereafter, the data
for further processing often re-used in the STL format.

INPUT:

nodes_file: Is the matrix of 3D - points
triangles_file: Is the matrix of the triangles
STL_file_name: Is the name for the generating STL file
solid: Is the name of the file inside the STL file

OUTPUT:

nomalized_normal_vectors: Is the matrix of the normal vectors of each triangle.

And of course: The STL file.