amount of code needed for the camera

Player follow camera

sf::RenderWindow& window = state_manager_.get_render_window();
	sf::View view_main;
	
	view_main.setCenter(sf::Vector2f(player_.Shape().getOrigin().x, player_.Shape().getOrigin().y));
	view_main.setSize(sf::Vector2f(600, 400));

	view_main.move(player_.Shape().getPosition().x, player_.Shape().getPosition().y);

	if (view_main.getCenter().x + (view_main.getSize().x / 2) >= LEVEL_WIDTH)
		view_main.setCenter(LEVEL_WIDTH - (view_main.getSize().x / 2), view_main.getCenter().y);

	if (view_main.getCenter().x - (view_main.getSize().x / 2) <= 0)
		view_main.setCenter(0 + (view_main.getSize().x / 2) , view_main.getCenter().y);

	if (view_main.getCenter().y + (view_main.getSize().y/2)  >= LEVEL_HEIGHT)
		view_main.setCenter(view_main.getCenter().x, LEVEL_HEIGHT - (view_main.getSize().y/2));

	if (view_main.getCenter().y - (view_main.getSize().y / 2) <= 0)
		view_main.setCenter(view_main.getCenter().x, 0 + (view_main.getSize().y / 2));
		
	window.setView(view_main); // applying the view
	
	window.draw(player_.Shape());
	
	
	// zoom the view relatively to its current size (apply a factor 0.5, so its final size is 600x400)
	view_main.zoom(0.5f);

	// define a centered viewport, with half the size of the window
	view_main.setViewport(sf::FloatRect(0.25f, 0.25, 0.5f, 0.5f));