cosine-gradient

Cosine gradient generator

Usage

cosineGradient(scheme)

Parameters:
scheme - array of cosine coefficients for R,G,B channels

Returns:
function(t) - a function calculating a color value for t=0..1. The returned color is an array [0..1, 0..1, 0..1]

Example

To get the middle blue gradient from the screenshot you would:

var cosineGradient = require('cosine-gradient');
var scheme = [
    [0.000,0.500,0.500],
    [0.000,0.500,0.500],
    [0.000,0.500,0.333],
    [0.000,0.500,0.667]
];
var gradient = cosineGradient(scheme);

for(var i=0; i<=100; i++) {
    var t = i / 100;
    var color = gradient(t); //[R=0..1, G=0..1, B=0..1]
}

Credits

This is an implementation of a technique by Inigo Quilez (Color Palettes) with color schemes by Karsten Schmidt aka Toxi from thi.ng/color and cosine gradient generator;

License

MIT, see LICENSE.md for details.