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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' M7 C: z* t$ x& j这功能其实很好用，比如选择面，自动显示面的法线等等。

2 t1 f6 P2 D- K6 e- _; Dstatic void do_UGopen_api(void)
/ q: n4 C3 H. S{
( m& k5 s4 t& ]% g5 o  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
7 f6 N0 Z, D+ h' K% j; w  double pt3[3] = {-2.0,-2.0,-2.0};
  double vect1[3] = {1.0, 1.0, 1.0};
3 g0 v. C' {* A& ~+ n1 [1 B& L  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
$ c0 E: E  T  w1 {   /* 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
   */
0 `: C$ H5 p+ L9 u' n  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
1 h9 p$ J$ m# `) L6 i                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
, G" h0 O  u0 r- i- Y: i' S- w  UF_DISP_get_conehead_attrb(&attrb);
0 z9 n7 U* }0 v' R& v8 n  /* Use color index three */
  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
3 d8 B6 [+ r3 e( v; i" c* C  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
  printf("\tTotal Length: %g\n", attrb.total_length);
  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
  printf("\TColor Index: %d\n", attrb.color);
  printf("\tFont Index: %d\n", attrb.font);
7 |: U, a! Q+ Y( V' ~  printf("\tDensity Index: %d\n", attrb.density);
$ U( z& y- U: D+ Z}
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