Function scale

docs/app/js/sanddance-app.js:69933–69937

(out, a, b)

    return out;
}
function scale(out, a, b) {
    out[0] = a[0] * b;
    out[1] = a[1] * b;
    return out;
}
function scaleAndAdd(out, a, b, scale1) {
    out[0] = a[0] + b[0] * scale1;
    out[1] = a[1] + b[1] * scale1;