Assignment 3

Computer Graphics, Spring 2007

Assignment 3: Ray Tracing Examples

Basic Ray Generation:
- (1) Generate a ray for each pixel

Ray-Primitive Intersection:
- (1) Intersect a ray with a sphere
  raypro sphere.scn out.jpg -width 320 -height 240
- (1) Intersect a ray with an axis-aligned box
  raypro cube.scn out.jpg -width 320 -height 240
- (2) Intersect a ray with a triangle mesh
  raypro tri.scn out.jpg -width 320 -height 240
  raypro teapot.scn out.jpg -width 320 -height 240
- (2) Intersect a ray with an axis-aligned cylinder
  raypro cylinder.scn out.jpg -width 320 -height 240
- (2) Intersect a ray with an axis-aligned cone
  raypro cone.scn out.jpg -width 320 -height 240

Ray-Scene Intersection:
- (1) Intersect a ray with a scene:
- (1) Handle scene traversals with modeling transformations:
  raypro transform.scn out.jpg -width 320 -height 240
- (1) Accelerate ray-scene intersection with bounding box checks:
- (1) Accelerate ray-scene intersection by caching the last intersection:
- (1) Accelerate ray-scene intersection by visiting children nodes in front-to-back order:
- (2) Accelerate ray-scene intersection using a grid:
- (3) Accelerate ray-scene intersection using an octree or BSP tree:

Lighting:
- (2) Phong Illumination
  raypro materials.scn out.jpg -width 320 -height 240
- (1) Polygonal light sources

Texture mapping:
- (1) Texture mapping
- (1) Bump mapping
- (1) Displacement mapping

Shadows:
- (1) Shadow rays:
  raypro dinopet_shadow_top.scn out.jpg -width 320 -height 240
  raypro dinopet_shadow_side.scn out.jpg -width 320 -height 240
- (2) Shadow maps

Global Illumination:
- (2) Indirect specular reflection
  raypro dinopet_reflect.scn out.jpg -width 320 -height 240 -samples 9
- (1) Transmission
- (1) Refraction
- (3) Distributed ray tracing
- (2) Omni-directional lighting.

Camera Effects:
- (1) Camera antialiasing
  raypro teapot.scn out.jpg -width 320 -height 240 -samples 1
  raypro teapot.scn out.jpg -width 320 -height 240 -samples 4
  raypro teapot.scn out.jpg -width 320 -height 240 -samples 16
- (2) Depth of Field
- (1) Motion blur
- (1 to 2) Reconstruction filters
  The following effect is somewhat subtle, but notice that the Box reconstruction (left) is slightly sharper than the Gaussian reconstruction (right) due to the shape of the filters.
  raypro teapot.scn out.jpg -width 320 -height 240 -samples 4 -filter 0
  raypro teapot.scn out.jpg -width 320 -height 240 -samples 4 -filter 1
- (2) Multi-pass rendering
- (1) Camera bloom