Use this method before building the lookup table. Useful for direct writes into object. Allocate a color table of specified size. Scalar values greater than maximum range value are clamped to maximum range value. Scalar values greater than maximum range value are clamped to maximum range value.
Table is built from linear ramp of each value.
Given a scalar value v, return an rgba color value from lookup table. Directly load color into lookup table. Directly load color into lookup table. Return a rgba color value for the given index into the lookup table. Return a rgba color value for the given index into the lookup table.