tri_surface_display_test, a MATLAB code which calls tri_surface_display(), which gets the names of the node and element files defining a 3D triangulated surface, reads the information from the files, and displays the surface on the screen.
tri_surface_display, a MATLAB code which displays the 3D graphics information in a tri_surface file;
DART is a simple dart shape, involving 5 nodes and 6 triangular faces.
SPHERE is a sphere, tiled with an 8 by 8 array of logically triangular patches.
TETRAHEDRON is a tetrahedron, defined by 4 triangular faces.