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TEST 1 - CS528 
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REMEMBER NO FINAL
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Instructor Dr P Juell                   NAME_______________________ 
OPEN BOOK                                        May 18, 1990
100 points         
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1. (30)
You are working with a set of data that consists entirely of cylinders.
Describe, in some detail the steps you would use to produce a reasonably
shaded image.
The internal information specifies the coordinate of the center of
the bottom disk, the coordinate of the center of the top disk and the radius.
Do not use ray tracing.
Be sure to
change the standard techniques to capitalize on the special information
about the objects in the image.

2. (20)
Why might a rendering program treat a glass cube differently from a glass
window pane?  Also specify what type of technique that would be used with each.

3. (20)
What is the relationship between the RGB model (for a particular monitor) and
the CIE model?

4. (20)
Specify the sequence of matrixes to change coordinate systems for the
the following.  You can leave angles in the sin and cos terms.
Do not multiply out the result.
Do not worry about the perspective transformation.
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The viewer will be at location (20,20,20) looking at the point (0,0,0).
The viewing plane goes through (10,10,10) [That is the viewing plane's
normal points in the direction from (10,10,10) to (0,0,0)].

5. (10)
Give a circumstance where you would prefer halftoning (super pixels) over
dithering.

Give a circumstance where you would prefer dithering over halftoning.