input processing

Vector2 offsetDirection = Vector2.Zero;

if (Controller.IsButtonDown(Buttons.Left))
    offsetDirection.X -= 1;
if (Controller.IsButtonDown(Buttons.Right))
    offsetDirection.X += 1;

if (Controller.IsButtonDown(Buttons.Up))
    offsetDirection.Y -= 1;
if (Controller.IsButtonDown(Buttons.Down))
    offsetDirection.Y += 1;

if (offsetDirection == Vector2.Zero)
    return;