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student    : sirkin
graded by  : Damian Isla
problem set: ivscan
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Renders 1st test (triangle)   (0-3): 2.5
Renders 2nd test (rgb)        (0-2): 2
Renders 3rd test (cube)       (0-2): 2
Renders 4th test (interpen)   (0-2): 2
Renders 5th test (ellipse)    (0-2): 2
Renders 6th test (geekball)   (0-2): 2
Exactitude                    (0-2): 2
total                        (0-15): 14.5
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notes:

Great job, Dave!

You just missed one tiny subtlety:
Good job on figuring out that you can just use xstart as the initial
value of xcurr (i.e. you have to adjust it to find the value of X at
the next scan-line). However, the trick is that you have to do the
same thing in RenderScanLine when you're interpolating across a
scanline. i.e. You can't just take e1->hcurr as the initial value of
hcurr -- you need to find the correctly interpolating value of h at
the center of the first pixel you will light. To do that you need a
correction term very similar to the one you used in the init function
in EdgeRec.C.

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