--------------------------------------------
student    : franco
graded by  : Damian Isla
time       : Mon Nov 22 20:25:35 EST 1999
problem set: ivray
--------------------------------------------
Eye ray generation            (0-2): 2
Cone, cyl, poly isection      (0-2): 2
Shadow                        (0-1): 1
Reflection                    (0-2): 1.5
Transmission                  (0-2): 1.5
Shading			      (0-2): 1
Supersampling and jittering   (0-2): 0
Statistics		      (0-1): 1
Exactitude                    (0-1): 1
total                        (0-15): 11
--------------------------------------------
notes:

Good job on a tough problem set. I found just a few problems with your
code:

In rendering point lights, the vector LdirWS (direction toward the
light) is set up in the opposite direction from where it should be.

When diffuse rendering, at times white speckles appear in the
output. Though the immediate cause of this is not obvious, the normal
problem, above, is a possible cause, and is definitely something to
look at.

Your reflection direction and transmission direction are off, though
its not clear whether this is a problem with your
TransmissionDirection() and ReflectionDirection() implementations.

Angular attenuation was not implemented.

Jittering / supersampling was not implemented.

--------------------------------------------