Cube Height  A cube centered at the modeling coordinates origin with sides of the
given length.

Dodecahedron  A dodecahedron (12sided regular solid) centered at the modeling
coordinates origin with a radius of sqrt 3.

Icosahedron  A icosahedron (20sided regular solid) centered at the modeling
coordinates origin with a radius of 1.0.

Octahedron  Render a solid octahedron (8sided regular solid) centered at the
modeling coordinates origin with a radius of 1.0.

Tetrahedron  Render a solid tetrahedron (4sided regular solid) centered at the
modeling coordinates origin with a radius of sqrt 3.

RhombicDodecahedron  (freeglut only) A rhombic dodecahedron whose corners are at most a
distance of one from the origin. The rhombic dodecahedron has faces
which are identical rhombi, but which have some vertices at which three
faces meet and some vertices at which four faces meet. The length of
each side is (sqrt 3)/2. Vertices at which four faces meet are found
at (0, 0, +/1) and (+/(sqrt 2)/2, +/(sqrt 2)/2, 0).

Sphere' Radius Slices Stacks  A sphere centered at the modeling coordinates origin of the specified
radius. The sphere is subdivided around the Z axis into slices
(similar to lines of longitude) and along the Z axis into stacks
(similar to lines of latitude).

Cone Radius Height Slices Stacks  A cone oriented along the Z axis. The base of the cone is placed at Z
= 0, and the top at Z = the given height. The cone is subdivided
around the Z axis into slices, and along the Z axis into stacks.

Cylinder' Radius Height Slices Stacks  (freeglut only) A cylinder oriented along the Z axis. The base of the
cylinder is placed at Z = 0, and the top at Z = the given height. The
cylinder is subdivided around the Z axis into slices, and along the Z
axis into stacks.

Torus Radius Radius Sides Rings  A torus (doughnut) centered at the modeling coordinates origin
whose axis is aligned with the Z axis. The torus is described by its
inner and outer radius, the number of sides for each radial section,
and the number of radial divisions (rings).

Teapot Height  A teapot with a given relative size.

SierpinskiSponge NumLevels  (freeglut only) A Sierpinski sponge of a given level, where a level
0 sponge is the same as a Tetrahedron.
