function free_cam()
{
	player = my;
        my.invisible = off;
	var fly_speed;
	var fly_turn_speed = 12;
        vec_set (camera.x, my.x); 
        vec_set (camera.pan, my.pan); 
        while(my)
	{
		if (key_shift) { fly_speed = 44; }
		else { fly_speed = 32; }

		vec_set (temp, nullvector);
		temp.x = (mouse_left - mouse_right) * fly_speed * time_step;
		camera.pan -= fly_turn_speed * mouse_force.x * time_step;
	        camera.pan = camera.pan%360;
                camera.tilt += fly_turn_speed * mouse_force.y * time_step;
                camera.tilt = clamp(camera.tilt, -90, 90); //limit
     	        camera.roll = 0;
   	        vec_rotate (temp, camera.pan);
		vec_add (camera.x, temp);		
  	   wait(1);
	}
}