Move Background in Opposite Direction so it looks like Player is Moving to stop Player from going in a circle

MovePlayerToMouse.cpp

// See RotateToMouse.cpp for definition of delta

sf::Vector2f normalizedDelta(delta / hypot(delta.x, delta.y));

if(sf::Keyboard::isKeyPressed(sf::Keyboard::W))
	background.move(sf::Vector2f(-normalizedDelta.x, -normalizedDelta.y));
			
if(sf::Keyboard::isKeyPressed(sf::Keyboard::S))
	background.move(sf::Vector2f(normalizedDelta.x, normalizedDelta.y));

if(sf::Keyboard::isKeyPressed(sf::Keyboard::A))
	background.move(sf::Vector2f(-normalizedDelta.y, normalizedDelta.x));
				
if(sf::Keyboard::isKeyPressed(sf::Keyboard::D))
	background.move(sf::Vector2f(normalizedDelta.y, -normalizedDelta.x));