vector sample_sphere_cone(vector center, float maxangle, vector u)
center
Direction in the center of the cone. This does not need to be normalized.
maxangle
Maximum angle, in radians, away from center
that any sample of the cone
will be, so long as all u
values are between 0 and 1.
u
Three numbers between 0 and 1.
Returns a vector of length < 1, based on u
.
Given uniform random u
vectors of three values in [0,1)
, the returned vectors will be
uniform random and continuous with respect to u
inside the unit sphere,
in the volume within maxangle
of the direction indicated by center
.
See also |