【求助】UDO问题！

hmjjh

我把清华那本书上面的那个UDO2程序试了一下，运行没有错误，但是结果不对！具体表现是：可以作出那个block，但是uc1601相关的显示却没有出现(也就是回调函数没有执行)！但是当我把block删除后可能（因为不是每次都出现，时有时无）出现 “in display event”。各位大虾帮忙看看原因是什么，顺便提下udo有什么优势！
  
主要代码如下：
void registed_display_fun(tag_t udo, void *display_context)
{
  int errorCode = UF_initialize();
  uc1601("in display event" , 1);
  errorCode = UF_terminate();  
}
  
void registed_select_fun(tag_t udo, void *select_context)
{
  int errorCode = UF_initialize();
  uc1601("in select event" , 1);
  errorCode = UF_terminate();  
}
  
void registed_fit_fun(tag_t udo, void *select_context)
{
  UF_UDOBJ_all_data_t all_data;
  char *class_name , *friendly_name;
  
  int errorCode = UF_initialize();
  uc1601("in fit event" , 1);
  
  errorCode = UF_UDOBJ_ask_udo_data ( udo, [$all_data)]
   &nbsprintErrorMessage(errorCode);
  
  errorCode = UF_UDOBJ_ask_class_data( all_data.class_id,  
    [$class_name, & friendly_name )]
   &nbsprintErrorMessage(errorCode);
  
  UF_UDOBJ_free_udo_data( [$all_data )]
  uc1601( class_name, 1);
  uc1601( friendly_name, 1);
  UF_free( class_name);
  UF_free( friendly_name );
  errorCode = UF_terminate();
}  
/*  Unigraphics Startup
**      This entry point activates the application at Unigraphics startup */
extern DllExport void ufsta( char *param, int *returnCode, int rlen )
{
    /* Initialize the API environment */
    int errorCode = UF_initialize();
  
    if ( 0 == errorCode )
    {
        /* TODO: Add your application code here */
  
        /* Terminate the API environment */
        errorCode = UF_terminate();
    }
  
    /* Print out any error messages */
   &nbsprintErrorMessage( errorCode );
}
/*  Explicit Activation
**      This entry point is used to activate the application explicitly, as in
**      "File->Execute UG/Open->User Function..." */
extern DllExport void ufusr( char *parm, int *returnCode, int rlen )
{        
      double block_orig[3] = {0.0, 0.0, 0.0};
    char *block_len[3] = {"1", "2", "3"};
    tag_t block_tag;
    UF_FEATURE_SIGN sign = UF_NULLSIGN;
    
    UF_UDOBJ_class_t class_id;
    tag_t udo_tag = NULL_TAG;
    UF_UDOBJ_link_t link_defs[1];
  
//    void *select_contex;
    /* Initialize the API environment */
    int errorCode = UF_initialize();
  
    if ( 0 == errorCode )
    {
  
    UF_MODL_create_block1(sign, block_orig, block_len, [$block_tag)]
    errorCode = UF_UDOBJ_create_class("UDOTestClass", "MY_UDO", [$class_id)]
   &nbsprintErrorMessage( errorCode);
  
    errorCode = UF_UI_add_to_class_sel(class_id);
   &nbsprintErrorMessage(errorCode);
  
    errorCode = UF_UDOBJ_create_udo( class_id, [$udo_tag )]
     &nbsprintErrorMessage(errorCode);
  
    link_defs[0].link_type = 1;
    link_defs[0].assoc_ug_tag = block_tag;
    link_defs[0].object_status = 0;
  
    errorCode = UF_UDOBJ_add_links(udo_tag, 1, link_defs);
     &nbsprintErrorMessage(errorCode);
  
    errorCode = UF_UDOBJ_add_owning_links(udo_tag ,1, [$block_tag)]
     &nbsprintErrorMessage(errorCode);
  
    errorCode = UF_UDOBJ_register_display_cb(class_id, registed_display_fun);
     &nbsprintErrorMessage(errorCode);
  
    errorCode = UF_UDOBJ_register_select_cb(class_id, registed_select_fun);
     &nbsprintErrorMessage(errorCode);
  
    
    errorCode = UF_UDOBJ_register_fit_cb( class_id, registed_fit_fun);
      PrintErrorMessage(errorCode);
  
    
        errorCode = UF_terminate();
    }
  
    /* Print out any error messages */
    PrintErrorMessage( errorCode );
}
  
程序附件如下：

lita_2005

hmjjh

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hmjjh

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