S3d Format:

There are two types of s3d commands you need to know: material commands
and polygon commands.  Also note that any line starting with '#' is a
comment.

Material Commands:

There are three material commands.  One sets the diffuse term (d),
another the specular (s), and the third the phong coefficient (p).
Each is a one letter command followed by 3 floats.  The three floats
are RGB triples for the diffuse and specular commands.  For the phong
coefficient, all three values should be set to the phong coefficient
(ie, they should be equal).  Example:

d .8 .3 .3
s .5 .5 .5
g 9 9 9



Polygon commands:

A polygon has a start and end command.  In between is a list of
vertices with optional normals.  Each command has three arguments.
For the begin polygon command (P), the first argument is the number of
vertices and the other two should be zero.  For the end polygon
command (E), all three arguments should be zero.  Both the normal (n)
and the vertex (v) have x,y,z as their arguments.  The normal should
precede the vertex.  The polygons should be planar and obey the right
hand rule.

Example:

P 3 0 0
n 0 0 1
v 0 0 0
n 0 0 1
v 1 0 0
n 0 0 1
v 0 1 0
E 0 0 0



For a complete specification of s3d, see the file
	http://www.student.cs.uwaterloo.ca/~cs779/Documentation/a3d.txt
(a3d was the old name for s3d).  Note one difference between the
description there are what you should use: the first argument of
the "start" commands (e.g., 'P') should be as described above (ie,
should state the number of vertices) rather than be zero.