04/08/2003
15-462 Graphics I
3
Image vs. Object Space
•Image
space: Ray tracing
–Trace
backwards from viewer
–View-dependent
calculation
–Result:
rasterized image (pixel by pixel)
•Object
space: Radiosity
–Assume
only diffuse-diffuse interactions
–View-independent
calculation
–Result:
3D model, color for each surface patch
–Can
render with OpenGL