REVIEW

======OPEN BOOK EXAM ========

on Dec 2, 1998

• visible/hidden surfaces
  • wire frame depth cuing (intensity cuing, hidden line)
  • back face removal
  • depth-buffer method (z-buffer)
  • scan-line method
  • depth-sorting method (painter's algorithm)
  • octree methods
• shading
  • constant-intensity shading
  • formulas: ambient light, diffuse, specular
  • Gouraud shading (determine edge normals, calculation light, average from side to side)
  • Phong shading (determine edge normals, average normals from side to side, calculate light)
• spectral highlights - ray tracing
  • start tracing rays from eye point through pixels
  • at each surface calculate lighting and reflected ray
  • build ray tree (apply distance attenuation)
  • mask (restrict) calculations in volumes
• diffuse lighting - radiosity
  • hemisphere model (hemicube)
  • radiosity equation (all surfaces lighting all surfaces)
  • progressive refinement (interactive process: sort on brightness, shoot light surface patch by surface patch)
• image properties
  • dithering
  • Gamma correction