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student    : flaspa
graded by  : Damian Isla
time       : Mon Nov 22 19:25:12 EST 1999
problem set: ivray
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Eye ray generation            (0-2): 2
Cone, cyl, poly isection      (0-2): 2
Shadow                        (0-1): 0
Reflection                    (0-2): 1
Transmission                  (0-2): 1
Shading			      (0-2): 1
Supersampling and jittering   (0-2): 2
Statistics		      (0-1): 1
Exactitude                    (0-1): 1
total                        (0-15): 11
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notes:

Your code looks good, although I'm getting some severe problems when I
try and run your executable: all the objects are completely
black. Also in some cases, the program hangs, particularly the more
complex test examples we ran it on. This hanging seems to be a problem
with your shadowing code, since it only hangs when -shadowing or
-recursive are specified on the command line (the only time that the
shadowing code is run.

Some specifics:
One little problem you had was that for infinite lights, the
direction-to-light vector, lDirWS, was reversed -- it should have been
-light->directionWS rather than light->directionWS. I don't know if
this was the cause of some of the other problems you had, but
certainly its effects are unpredictable.

Also: in TransmissionRadiance, you should assume that if we are
entering an object, we are entering it from vacuum (eta = 1) and when
we are exiting, we are exiting to vacuum. However, this was not made
clear enough in the notes, so no points were taken off of you for it.

You did not implement angular attenuation.


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