Thread: particle size - power curve distribution?

I'm trying to assign particles a random size between two values...then I want to be able to control the ratio of small to large based on a power curve. i.e. sizeMin value = 1 sizeMax value = 10 sizeRatio is a 0-1 attribute when sizeRatio = 0 -- all smaller ones (blue curve in image) when sizeRatio = .5 -- even distribution of small and large (green curve in image) when sizeRatio = 1 -- all larger ones (red curve in image) I'm...

I think bias function is all you need in this case. Something like this: Code: global proc float bias(float $val, float $b) { if ($b>0) { return pow($val,log($b) / log(0.5)); } else { return 0; } }