bilinear interpolation (gradient 2d) 2 dimensional color interpolation based on several rgb points.
demo : http://dismedia.pl/index.php/bilinear-interpolation-gradient2d/
files : bi.js - bilinear interpolation algorithm; gradientEdit.js - jQuery based editor;
Output examples :
using: Farbtastic Color Picker 1.2 by Steven Wittens
by Marcin Wykręt - http://dismedia.pl