UGNX二次开发源码分享：关于显示UG NX临时箭头功能

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这功能其实很好用，比如选择面，自动显示面的法线等等。

static void do_UGopen_api(void)
{
  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
  double pt3[3] = {-2.0,-2.0,-2.0};
) D% t  R# |  H6 T8 R. |$ V  double vect1[3] = {1.0, 1.0, 1.0};
  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
! z$ |: Y" q9 M9 d4 ]                   pt1, vect1, 1);
5 V' M1 z6 G/ A% `# k3 ~% ^   /* Example to draw the vector with the base of its staff
      anchored at the origin so that the vector appears to point
      away from the origin
   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
6 f9 Q8 o" k, ^; J1 C  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
/ f5 [9 D3 w* @0 z9 B+ I                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
- k3 @9 E, a5 s2 V  /* Use color index three */
4 S: R) K$ R: q' k& h  attrb.color = 3;
* ]) N* o/ ]2 \6 @1 H. F6 v" B  /* Update the current attribute settings */
5 g, T; ]2 o0 h. l; v3 n4 J0 A  UF_DISP_set_conehead_attrb(&attrb);
  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
  printf("\tTotal Length: %g\n", attrb.total_length);
) V; H1 r9 g! S7 _# @# q/ U: r  S  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
  printf("\TColor Index: %d\n", attrb.color);
3 W0 e# F% h2 P  printf("\tFont Index: %d\n", attrb.font);
6 ^& c# [5 p$ H) r" `  printf("\tDensity Index: %d\n", attrb.density);
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