Practical polygon antialiasing

CS 248 - Introduction to Computer Graphics
Autumn Quarter, 2005
Marc Levoy
Lecture notes for Tuesday, October 18 (first half of class)
(taped Friday, October 14)

Table of contents:

• Polygon scan conversion with supersampling/resampling
  1. 1 scan conversion to a supersampling grid
  2. s scan conversions with shifted centers
  3. Handling multiple polygons
• Practical analytical filtering
  1. Unweighted area sampling
  2. Weighted area sampling
• Polygon scan conversion with analytical antialiasing
  • Assumptions
  • Algorithm #1: exact area integration
  • Algorithm #2: exact volume integration

Algorithm 2 is also known as "accumulation buffer antialiasing". It is the algorithm we have asked you to implement in project #2.
If you want to learn more about this algorithm and some of the neat things it can be used for, read Haeberli, P., Akeley, K., The Accumulation Buffer: Hardware Support for High-Quality Rendering, Computer Graphics (Proc. SIGGRAPH), 24:4, pp. 309-318, 1990.

Reference: Feibush, E., Levoy, M. and Cook, R., Synthetic Texturing using Digital Filters,
Computer Graphics (Proc. SIGGRAPH '80), Vol. 14, No. 3, Seattle, Washington, July, 1980, pp. 294-301.

I didn't cover algorithm #2 in class, and I won't expect you to know it. If you're interested, it's described on pages 822-826 of the textbook.