Function lengthPointFirst

docs/app/js/sanddance-app.js:133693–133696

(x, y)

    }
};
function lengthPointFirst(x, y) {
    lengthStream.point = lengthPoint;
    x00 = x0 = x, y00 = y0 = y;
}
function lengthPoint(x, y) {
    x0 -= x, y0 -= y;
    lengthSum.add((0, _mathJs.sqrt)(x0 * x0 + y0 * y0));