CS 445 Exam 2 Review

Exam 2 will be held Tuesday April 23, 2002.

Many of the questions on the above exams are not appropriate for this class but you should be able to figure out which ones they are.

Topics

• Lighting:
• Ambient: what is it and what how is it modeled mathematically
• Diffuse: what is it and what how is it modeled mathematically
• Specular: what is it and what how is it modeled mathematically
• Line Drawing
• Digital Differential Analyzer (DDA)
• Midpoint Algorithm for drawing Lines and Circles
• Antialiasing
• What is aliasing in the context of signal processing?
• What is the Nyquist frequency?
• What is aliasing in the context of computer graphics?
• What are the different anti-aliasing techniques
• Prefiltering
• Postfiltering: supersampling, weighted filters, jitter
• Gupta-Sproul Algorithm
• Polygon fill: issues, algorithm, data structures, defining the interior
• Clipping:
• Cohen-Sutherland Line Clipping Algoritm
• Cyrus-Beck Parametric Line Clipping Algorithm
• Sutherland-Hodgman Polygon-Clipping Algorithm