int mav_callbackDrawExec(MAV_window *w, MAV_object *o, MAV_drawInfo *di);
int mav_callbackBBExec(MAV_window *w, MAV_object *o, MAV_BB *bb);
int mav_callbackIntersectExec(MAV_window *w, MAV_object *o, MAV_line ln, MAV_objectIntersection *oi);
int mav_callbackIDExec(MAV_window *w, MAV_object *o, char **id);
int mav_callbackDumpExec(MAV_window *w, MAV_object *o);
int mav_callbackGetUserdefExec(MAV_window *w, MAV_object *o, void ***ud);
int mav_callbackGetMatrixExec(MAV_window *w, MAV_object *o, MAV_matrix **m);
int mav_callbackGetSurfaceParamsExec(MAV_window *w, MAV_object *o, MAV_surfaceParams ***sp);