reference for scratch games. scratch doesn't have an atan2 function, which is very useful for calculating directions (in terms of angles). so i made a reference file here. keep in mind that scratch automatically puts things in degrees, so there's no need to have a conversion function in scratch. also, sometimes this will return values 360 degree…

atan2-function-for-scratch.js

function toDegrees (angle) {
    return angle * (180 / Math.PI);
}

function myAtan2(y, x) {
    if (x > 0) {
        return toDegrees(Math.atan(y/x));
    }
    else if (x < 0) {
        return (180 + toDegrees(Math.atan(y/x)));
    }
    else if (y !== 0) {
        return toDegrees(Math.atan(y/x));
    }
    else {
        return "not a number";
    }
}

var inputx = -1;
var inputy = -2;

var num1 = Math.atan(inputy, inputx);
var num2 = Math.atan2(inputy, inputx);
var num3 = myAtan2(inputy, inputx);

num1 = toDegrees(num1);
num2 = toDegrees(num2);
// num3 is converted to degrees in its function

console.log("   atan:  " + num1);
console.log("   atan2: " + num2);
console.log("my atan2: " + num3);

console.log(toDegrees(Math.atan(inputy/inputx)));