Function supershape

pattern/canvas.js:1899–1925

(x, y, width, height, m, n1, n2, n3, options)

/*--- SUPERSHAPE -----------------------------------------------------------------------------------*/

function supershape(x, y, width, height, m, n1, n2, n3, options) {
    /* Returns a BezierPath constructed using the superformula (Gielis, 2003),
     * which can be used to describe many complex shapes and curves that are found in nature.
     */
    var o = options || {};
    var pts = (o.points !== undefined)? o.points : 100;
    var pct = (o.percentage !== undefined)? o.percentage : 1.0;
    var rng = (o.range !== undefined)? o.range : 2 * Math.PI;
    var path = new Path();
    for (var i=0; i < pts; i++) {
        if (i <= pts * pct) {
            var d  = geometry.superformula(m, n1, n2, n3, i * rng / pts);
            var dx = d[0] * width / 2 + x;
            var dy = d[1] * height / 2 + y;
            if (path.array.length == 0) {
                path.moveto(dx, dy);
            } else {
                path.lineto(dx, dy);
            }
        }
    }
    path.closepath();
    if (o.draw === undefined || o.draw == true) {
        path.draw(o);
    }
    return path;
}

/*##################################################################################################*/