function move_camera() // Bewegung der Kamera
{
	
	
	camera.x = 0;
	camera.y = 0;
	camera.z = 500;
	camera.pan = 0;
	camera.tilt = 330;
	
		while (1)
	{
		if (key_cuu) camera.x += 5 * time_step && camera.y += 5 * time_step;
		if (key_cud) camera.x -= 5 * time_step && camera.y -= 5 * time_step;
		if (key_cur) camera.x += 5 * time_step && camera.y -= 5 * time_step;
		if (key_cul) camera.x -= 5 * time_step && camera.y += 5 * time_step;
		if (key_plus) camera.z += 50 * time_step;
		if (key_slash) camera.z -= 50 * time_step;
		if (key_home) camera.tilt += 5 * time_step;
		if (key_end) camera.tilt -= 5 * time_step;
		
		wait (1);
	}
}