How to interpolate a color sequence?

Question

I need to interpolate or change gradually a sequence of colors, so it goes from colorA to colorB to colorC to colorD and them back to colorA, this need to be based on time e

Answer 1

Your code is mostly correct, but you are doing the interpolation backwards: i.e. you are interpolating B->A, then C->B, then D->C, etc. This causes the discontinuity when switching colors.

You should replace this:

colorT.r = colors[colorsIndex].r * p + ( colors[colorsIndex+1].r * ( 1.0 - p ) );

with:

colorT.r = colors[colorsIndex].r * (1.0 - p) + ( colors[colorsIndex+1].r * p );

and the same for the other lines.

Also, as others have said, using a different color space than RGB can provide better looking results.