Function atan

docs/app/js/sanddance-app.js:69459–69461

(radians9, result)

    return map(radians8, (angle)=>Math.acos(angle), result);
}
function atan(radians9, result) {
    return map(radians9, (angle)=>Math.atan(angle), result);
}
function clamp(value1, min, max) {
    return map(value1, (value)=>Math.max(min, Math.min(max, value)));
}