sub
fun sub(u: ClosedFloatingPointRange<Double>, v: ClosedFloatingPointRange<Double>): Rectangle(source)
Return a sub-rectangle spanning over the provided u and v ranges.
For example to obtain one quadrant of the rectangle one uses .sub(0.0 .. 0.5, 0.0 .. 0.5)
Return a sub-rectangle spanning from (u0, v0) to (u1, v1)
For example to obtain one quadrant of the rectangle one uses .sub(0.0, 0.0, 0.5, 0.5)