scm_c_define_gsubr ("get-gui-environment", 1, 0, 0, (scm_t_subr)irr_getGUIEnvironment);
scm_c_define_gsubr ("get-scene-manager", 1, 0, 0, (scm_t_subr)irr_getSceneManager);
scm_c_define_gsubr ("get-video-driver", 1, 0, 0, (scm_t_subr)irr_getVideoDriver);
scm_c_define_gsubr ("get-gui-environment", 1, 0, 0, (scm_t_subr)irr_getGUIEnvironment);
scm_c_define_gsubr ("get-scene-manager", 1, 0, 0, (scm_t_subr)irr_getSceneManager);
scm_c_define_gsubr ("get-video-driver", 1, 0, 0, (scm_t_subr)irr_getVideoDriver);