Function rotate

src/components/drawing/symbol_defs.js:734–744

(t, xy)

    lastPathIn = path;

    function rotate(t, xy) {
        var cosT = cos(t);
        var sinT = sin(t);

        var x = xy[0];
        var y = xy[1] + (standoff || 0);
        return [
            x * cosT - y * sinT,
            x * sinT + y * cosT
        ];
    }

    var t = angle / 180 * PI;