UE::Geometry::VectorUtil::UniformSampleTriangleBarycentricCoords

Sample uniform random barycentric coordinates on a triangle The inputs should be two random floating point numbers in the [0,1] range (See eq. 1 of 'Shape Distributions' by Osada, Funkhouser, Chazelle and Dobkin) Note the sample positions will not match those of UniformSampleTrianglePoint for the same R1, R2 values