--------------------------------------------
student    : bwallis
graded by  : Damian Isla
time       : Fri Nov 19 18:37:20 EST 1999
problem set: ivray
--------------------------------------------
Eye ray generation            (0-2): 2
Cone, cyl, poly isection      (0-2): 1.5
Shadow                        (0-1): 0
Reflection                    (0-2): 1
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): 9
--------------------------------------------
notes:

Well there are some problems with your implementation, as I'm sure you
know. It seems that you just didn't get to a lot of stuff. Plus, it
crashes on most of our test examples. Here are some of the problems I
found:

For both Spheres and Cones, the normal that you compute is
reversed. In cones there are other normal problems around the edges of
the cones it seems. If you are having other problems with the program,
this might be one cause.

You have some problems with computing light directions. In the case of
inifinite_lights, you set lightdirection to be light->directionWS when
it should be the negative of that value. In the case of spotlights,
you take it to be light->directionWS, which is wrong, since spot
lights have a definite origin in the world. This value should be set
to light->locationWS-hit.surfpWS.

When you recurse in ReflectionRadiance and TransmissionRadiance, you
should be scaling the weight down as you recurse. The idea is that we
can stop recursing if the weight drops below a certain threshold,
meaning that no matter what, that ray will not contribute
significantly to the pixel being shaded. In ReflectionRadiance you
also should be checking the reflectivity of the object. Right now, all
objects are acting as 100% reflectors.

No shadowing implemented

No angular attenuation

Specular Radiance is incorrectly calculated.

No jitter/supersampling.

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