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student    : mmaa
graded by  : Damian Isla
problem set: ivscan
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Renders 1st test (triangle)   (0-3): 2
Renders 2nd test (rgb)        (0-2): 1
Renders 3rd test (cube)       (0-2): 1
Renders 4th test (interpen)   (0-2): 1
Renders 5th test (ellipse)    (0-2): 2
Renders 6th test (geekball)   (0-2): 2
Exactitude                    (0-2): 2
total                        (0-15): 11
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notes:

Your renderer is mostly working, but there are a few problems with it:

1) It does not correctly decide whether to light a pixel or not:
   pixels should only be lit when the pixel CENTER lies within the
   polygon. This did not work correctly in your implementation,
   probably because you did not adjust the starting X-value of each
   line to account for the points of the edge being off-center.

2) Color interpolation had something wrong with it - at the end of
   some polygon spans bright pixels appeared.

3) Depth interpolation did not function correctly. You should have
   been linearly interpolating h, not z, to get accurate intermediate
   depth values.

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