getMouseOnCircle method
Implementation
Vector2 getMouseOnCircle(num pageX, num pageY) {
vector.setValues(
((pageX - scope.screen['width'] * 0.5 - scope.screen['left']) /
(scope.screen['width'] * 0.5)),
((scope.screen['height'] + 2 * (scope.screen['top'] - pageY)) /
scope.screen['width']) // screen.width intentional
);
return vector;
}