User:Pedro Oval/Uniform random rotation
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Revision as of 05:56, 4 March 2011 by Pedro Oval (talk | contribs) (Changed link for the reference in the book, as the previous one ceased to work)
Based on a "graphics gem" by Ken Shoemake [1]
<lsl> rotation UniformRandRot() {
// Method from Graphic Gems 3, "Uniform Random Rotations" // by Ken Shoemake, p.130 float x0 = llFrand(1.0); float a1 = llFrand(TWO_PI); float a2 = llFrand(TWO_PI); float r1 = llSqrt(1.0 - x0); float r2 = llSqrt(x0); float s1 = llSin(a1); float c1 = llCos(a1); float s2 = llSin(a2); float c2 = llCos(a2); return <s1*r1, c1*r1, s2*r2, c2*r2>;
} </lsl>