Function fastLerp

fastLerp(normalizedValue, colors, out?): number[]
Map value to color. Faster than lerp methods because color is represented by rgba array.
Parameters
- normalizedValue: number
  A float between 0 and 1.
- colors: number[][]
  List of rgba color array
- Optional out: number[]
  Mapped gba color array
Returns number[]
will be null/undefined if input illegal.