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sample_sphere_shell_uniform

Since17.0

vector  sample_sphere_shell_uniform(vector u, float alpha)

u

Three numbers between 0 and 1.

alpha

The inner radius to be bounded by. A number between 0 and 1.

Returns a vector of length < 1, based on u. Given uniform random u vectors of three values in [0,1), and a number in [0,1], the returned vectors will be uniform random and continuous with respect to u inside the unit sphere shell with the inner raidus alpha.