Phil Katz and Stephen St.Vincent
Lab description
Lab summary:
For this lab, we implemented a Z-Buffer algorithm for our graphics environment. We added a z-buffer data field to the Image structure, and appropriate flags and modifiers to other structures. The most intricate part of the algorithm was implementing the Z-Buffer for polygons. We had to create fields to help interpolate 1/Z values for each point along each scanline, and compare these values to the current value in the Z-Buffer. We also implemented 1/Z value interpolation for each point along a line for each case of Bresenham's Line-Drawing Algorithm.
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- What extensions did you do for this assignment, how did you do them, and how well did they work?
We did not do any extensions for this lab.
- We know z varies inversely with x and y for perspective projection. How does z vary relative to x and y for parallel projection?
With Parallel perspective, Z varies as it would in "no-perspective" viewing: linearly with x and y.