Range
Vec2 = [0, 1] x is the result at r = 0 and y the result at r = 1. The two ends need not be in order.
A float driver that returns a random value over Range
weighted toward Range.y: Range.x + (Range.y - Range.x) * sqrt(r), where r is the
driver's random number between 0 and 1. When r is drawn and whether it is shared
between particles is described under Random values on IVfxBaseDriver.
The probability density grows linearly from Range.x to Range.y. With Range.x at 0
and the result used as the radius of a disc, the points are spread evenly over the disc's
area.
Vec2 = [0, 1] x is the result at r = 0 and y the result at r = 1. The two ends need not be in order.