Function corner

docs/app/js/sanddance-app.js:133079–133081

(p, direction)

        else stream.point(to[0], to[1]);
    }
    function corner(p, direction) {
        return (0, _mathJs.abs)(p[0] - x0) < (0, _mathJs.epsilon) ? direction > 0 ? 0 : 3 : (0, _mathJs.abs)(p[0] - x1) < (0, _mathJs.epsilon) ? direction > 0 ? 2 : 1 : (0, _mathJs.abs)(p[1] - y0) < (0, _mathJs.epsilon) ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
    }
    function compareIntersection(a, b) {
        return comparePoint(a.x, b.x);
    }