Shadow Algorithms Data Miner

4.7. Ray Tracing 131

4.7.1 Distribution Ray Tracing

In terms of so shadows within ray tracing, variations of the distribution ray trac-

ing approach [108] have become the most oen used technique. An example

is the work using distribution ray tracing for linear and area light sources [463]

and curve light sources [33]. By distribution ray tracing, we mean shooting a

number of rays towards the extended light to come up with an average for the

shadow occlusion fraction or to estimate the radiance at each sample. is does

not imply that it always requires stochastic sampling as implemented in the orig-

inal work of Cook et al. [108]. Deterministic samp ...