问UF_CURVE_create_arc_center_radius函数

waterfish

extern UFUNEXPORT int UF_CURVE_create_arc_center_radius
(
    tag_t center, /* <I> tag of center */
    double radius, /* <I> value of radius */
    tag_t help_point, /* <I> point to define the start orientation */
    UF_CURVE_limit_p_t limit_p[2], /* <I> extension limits */
    tag_t support_plane, /* <I> tag of support plane of the arc */
    logical is_asso, /* <I> true - if associative, false - if not associative */
    tag_p_t arc_feature_id /* <O> if is_asso == TRUE - object identifier of new associtive arc feature */
                            /* <O> if is_asso == FALSE - object identifier of new associtive arc */
);
中参数
  UF_CURVE_limit_p_t limit_p[2], /* <I> extension limits */
是什么东西
我们程序是这样的，不好使
其中有些参数搞不懂什么意思，
请高手指教
  tag_t center;
  double point_center[3]={0,0,0};
  UF_CURVE_create_point(point_center,[$center)]
  //////
  double radius;
  radius=1;
  //////
  tag_t help_point;
  double point_help[3]={0,1,0};
  UF_CURVE_create_point(point_help,[$help_point)]  
  //////
  UF_CURVE_limit_p_t limit_p[2];
  UF_CURVE_limit_t limit_t[2];
    limit_p[0]=[$limit_t[0]]limit_p[1]=[$limit_t[1]]
  // 下面是它的成员
  // 下面几个不知道有什么用。
  UF_CURVE_limit_type_e limit_type1,limit_type2;
  limit_type1=UF_CURVE_limit_value;
  limit_type2=UF_CURVE_limit_value;
  
  double value1,value2;
  value1=0;
  value2=90;
  
  tag_t limiting_obj1,limiting_obj2;
  double point_limiting_obj1[3]={1,0,0};
  double point_limiting_obj2[3]={0,1,0};
  UF_CURVE_create_point(point_limiting_obj1,[$limiting_obj1)]  
  UF_CURVE_create_point(point_limiting_obj2,[$limiting_obj2)]
  
  UF_CURVE_help_data_s help_data1,help_data2;
  
  UF_CURVE_help_data_type_e help_data_type1,help_data_type2;
  help_data_type1=UF_CURVE_help_data_value;
  help_data_type2=UF_CURVE_help_data_value;
  
  double value11[3]={1,0,0};
  double value12[3]={0,1,0};
  
  help_data1.help_data_type=help_data_type1;
  //help_data1.value=value11;
  help_data1.value[0]=1;help_data1.value[1]=0;help_data1.value[2]=0;
  //help_data1.parameter=1;
  help_data2.help_data_type=help_data_type2;
  //help_data2.value=value12;
  help_data2.value[0]=0;help_data2.value[1]=1;help_data2.value[2]=0;
  //help_data2.parameter=2;
  
  
  limit_p[0]->limit_type=limit_type1;
  limit_p[0]->value=value1;
  limit_p[0]->limiting_obj=limiting_obj1;
  limit_p[0]->help_data=help_data1;
  limit_p[1]->limit_type=limit_type2;
  limit_p[1]->value=value2;
  limit_p[1]->limiting_obj=limiting_obj2;
  limit_p[1]->help_data=help_data2;
  
  //////
  
  tag_t plane;
  double  origin_point[3];
  double  pl1_normal[3];
  double  pl2_normal[3];
   
  tag_t   plane1_tag;
  
  origin_point[0] = 0.0;
  origin_point[1] = 0.0;
  origin_point[2] = 0.0;
  
  pl1_normal[0] = 0.0;
  pl1_normal[1] = 0.0;
  pl1_normal[2] = 1.0;
  
  UF_MODL_create_plane(origin_point, pl1_normal, [$plane1_tag)]
  
  plane=plane1_tag;
  
  logical is_asso;
  is_asso=true;
  
  tag_t arc;
  
UF_CURVE_create_arc_center_radius (
  center,  
  radius,  
  help_point,  
  limit_p,  
  plane,  
  is_asso,  
  [$arc )]
  
  UF_terminate();
  return (UF_MB_CB_CONTINUE);
}

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