Category: Blogs
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A Caveat on Differentiating Time-Domain Wave Boundary Integral Equations
Physicists usually do not worry about the order of integration and differentiation, since in most cases the functions involved are at least C^1-continuous. However, one cannot always take this for granted.
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Hemisphere Sampling or Spherical Sampling: A Small Detail of Importance Sampling the Poisson Kernel in Walk on Boundary
In WoBToolbox, there is a seemingly puzzling step when sampling this term: the author uses uniform hemisphere sampling to generate rays, and this hemisphere is not aligned with the geometric normal of the boundary.