Questions tagged [differential]
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Improve accuracy of mesh gradient?
So to make it simple. I currently use a method I found online to compute the gradient of a scalar field of a mesh.
To test how accurate this is, I made a sphere and followed the gradient direction of ...
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An equation about PDFs and differentials in the book of pbrt-v3
Why does the equation at the bottom of the following page hold?
http://www.pbr-book.org/3ed-2018/Monte_Carlo_Integration/Transforming_between_Distributions.html
$p(\theta,\phi)d\theta d\phi=p(\omega)...
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