The depth range of the z-axis of a rune is [0,-1], this function gives a [0, -frac] of the depth range to rune1 and the rest to rune2.
Fraction between 0 and 1 (inclusive)
Given Rune
Resulting Rune
The depth range of the z-axis of a rune is [0,-1], this function gives a [0, -frac] of the depth range to rune1 and the rest to rune2.