【求助】UF_MODL_ask_extrusion函数的使用问题，救急！！！

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利用该函数查询拉伸的参数，其中许多参数需要初始化和释放操作，请教如何正确的初始化和释放操作。
函数的说明如下：
extern UFUNEXPORT int UF_MODL_ask_extrusion(
tag_t feature_obj_id ,/* <I>
                      Object tag for the extruded feature
                      */
int* num_objects ,/* <O>
                  Number of curves
                  */
tag_t** objects ,/* <OF>
                &nbspointer to an array containing the tags of the extruded curves.
                 This array must be freed by calling UF_free.
                 */
UF_MODL_SWEEP_TRIM_object_p_t* trim_ptr ,/* <OF>
                                        &nbspointer to structure for trimming data.
                                         This pointer may be returned as NULL,
                                         if trimming objects are not used.
                                         NEEDS A FREE ROUTINE
                                         */
char** taper_angle ,/* <OF>
                    Taper angle.  This must be freed by calling UF_free.
                    */
char* limits[2] ,/* <OF>
                 Limits of extrusion.  Each element of this array must be
                 freed by calling UF_free.
                 */
char* offsets[2] ,/* <OF>
                  Offsets for open strings.  Each element of this array must be
                 freed by calling UF_free.
                  */
double region_point[3] ,/* <O>
                       &nbspoint on region desired.
                        */
logical* region_specified ,/* <O>
                           True or False for region desired.
                           */
logical* solid_creation ,/* <O>
                         TRUE = a solid body.
                         */
double direction[3]  /* <O>
                     Extrusion direction
                     */
);

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liberty000

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liberty000

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