Shadow Algorithms Data Miner

5.8. Ambient Occlusion 163

As mentioned before, the complexity of the problem is greatly increased if such

variables as moving occluders, moving lights, and extended lights are considered.

Sung et al. [569] formalize the motion-blur equation without explicitly considering

shadows:

i(ω, t)=





R(ω, t)g(ω, t)L(ω, t)dt dω,

where ω is the solid angle intersected with a pixel at time t, g(ω, t)is the visibility

of the geometry, R(ω, t) is the reconstruction lter, and L(ω, t) is the shading

equation. Imagine the worst-case scenario in which both g(ω, t)and L(ω, t)must

be folded into the penumbra integrand in order to compute a motion blurred so

shadow; the ...