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We can use the PDF 1/(A1*A2) for arbitrary shapes, not just rectangles.
For explanation, look here (pages 11/12): http://www.cs.utah.edu/~shirley/papers/mc94.pdf
We can use the PDF 1/(A1*A2) for arbitrary shapes, not just rectangles.
For explanation, look here (pages 11/12): http://www.cs.utah.edu/~shirley/papers/mc94.pdf