int type; //面的类型
double box[6];//x,y,z向最大,最小值
double radius;
double rad_data;
int norm_dir ;//法向
UF_MODL_ask_face_data(face,&type,center,
dir,box,&radius,&rad_data,&norm_dir);
16,UF_MODL_ask_minimum_dist_2//查询两物体间距离
double dis,accuracy;// accuracy:准确度
double point1[ 3 ]={0};
double point2[ 3 ]={0};
UF_CALL(UF_MODL_ask_minimum_dist_2 ( obj1, obj2, 0, NULL, 0, NULL,
& dis, point1, point1, &accuracy ));