04/10/2003
15-462 Graphics I
7
Substructuring
•Radiosity
assumed constant across patch
•Impact
of number of patches
–Few:
fast, but very inaccurate (blocky)
–Many:
slow O(n2), but much more accurate
•Substructuring
–Introduce
elements as a substructure
for patches
–Use
adaptively where radiosity varies rapidly
–Distinguish
elements and patches to avoid explosion