Function analog

pattern/canvas.js:886–897

(clr, angle, d)

}

function analog(clr, angle, d) {
    /* Returns a random adjacent color on the color wheel.
     * Analogous color schemes can often be found in nature.
     */
    if (angle === undefined) angle = 20;
    if (d === undefined) d = 0.1;
    var hsb = _rgb2hsb(clr.r, clr.g, clr.b);
    var hsb = _rotateRYB(hsb[0], hsb[1], hsb[2], Math.random() * 2 * angle - angle);
    hsb[1] *= 1 - Math.random()*2*d-d;
    hsb[2] *= 1 - Math.random()*2*d-d;
    return new Color(hsb[0], hsb[1], hsb[2], clr.a, {"colorspace":HSB});
}

/*--- COLOR MIXIN ----------------------------------------------------------------------------------*/
// Drawing commands like rect() have optional parameters fill and stroke to set the color directly.