target_motion.m camera.m drawEnvironmentCamera.m geolocation.m gimbal.jpg gimbal.m mavsim_chap13_geolocation.mdl mavsim_chap13_geolocation_model.mdl mavsim_chap13_gimbal.mdl mavsim_chap13_gimbal_model.mdl monstertruck.jpg point_gimbal.m param_chap13.m