f := zone.create.ratio(fr,index,isize)

Get a value calculated by a geometric progression, given a ratio , an index, and a size. This is the same ratio as is used in zone create , extrude block create, and building-blocks block create. This divides the interval from 0.0 to 1.0 into size sections, each of which is ratio times the size of the previous one.


f - the fraction from 0.0 to 1.0 of the geometric progression from 0 to isize at index of the given ratio


fr - the geometric ratio to use for the progression. Each interval will be ratio times larger than the previous.

index - the index (from 0 to isize) of the location in the progression to calculate

isize - the total number of intervals involved