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student    : gozar
graded by  : Damian Isla
time       : Mon Nov 22 21:34:12 EST 1999
problem set: ivray
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Eye ray generation            (0-2): 2
Cone, cyl, poly isection      (0-2): 1
Shadow                        (0-1): 0.5
Reflection                    (0-2): 1
Transmission                  (0-2): 1
Shading			      (0-2): 1.5
Supersampling and jittering   (0-2): 0
Statistics		      (0-1): 0
Exactitude                    (0-1): 1
total                        (0-15): 8
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notes:

Some of the problems I found with your code are:

The cone intersection code is not working correctly -- the reverse of
faces is not being rendered.

Polygon intersection also has problem -- polygons are coming out
looking curved.

The calculations of ReflectionDirection and TransmissionDirection are
both wrong. In the case of ReflectionDirection, you would just have to
add a minus sign!

In ReflectionRadiance() (in Shade.C) you have to multiply the output
by obj->specular.

Transmission radiance not implmened

Your shadowing code is not finished. To do shadowing correctly, this
needs to be iterative, where you just check for the first
object-hit. Also, you do not displace the starting point of the
shadows ray away from the surface -- this is probably the source of
the black speckling that you see in your output.

In Specular Radiance, you calculate the H vector wrong. It is 
LdirWS - viewdWS
not 
LdirWS + viewdWS


Supersampling, jittering, RayTraceStart and RayTraceFinish were not
implemented.

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