private Vector2 ScreenFromWorld(Vector2 position, ICameraModel2D cam)
{
var worldFocusToPoint = position - cam.GetWorldFocus();
var rotatedToScreenOrientation = Utility.Geometry.RotateVectorClockwise(worldFocusToPoint, -cam.GetWorldClockwiseRotationRadsFromPositiveY());
return(rotatedToScreenOrientation * cam.GetWorldZoom());
}
private Vector2 WorldFromScreen(Vector2 position, ICameraModel2D cam)
{
var up = cam.GetWorldUp();
var right = new Vector2(up.Y, -up.X);
position /= cam.GetWorldZoom();
var shiftFromFocus = (position.X * right) + (position.Y * up);
return(cam.GetWorldFocus() + shiftFromFocus);
}