A PDL user requested the ability to "generate a grid of spheres and/or cubes in TriD".
A result of the perldl list discussion at
a rough demonstration of the desired functionality was completed by overriding
the gl_points and gdraw methods with the points3d routine.
Support for colors, varying radii, and smoother shading on the spheres
via the use of appropriate normals is needed beyond the quick demo.
The sphere.pdl quick draft (attached to this ticket)