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)
0 V0 m0 G- G- E& S! B' x% n{
* I4 N- J! }: _  m* g) A  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
& |2 R  ]$ ^1 N7 ]2 T) F  double pt3[3] = {-2.0,-2.0,-2.0};
  double vect1[3] = {1.0, 1.0, 1.0};
  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
9 v) }: y6 o* u) }5 _# y- O                   pt1, vect1, 1);
   /* 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
   */
8 D2 c1 B: q! E4 [  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
/ W' H3 u8 E$ F4 G  O  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
7 |# j5 y/ `" T  Z" n  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);
3 m8 A# `( h6 S6 V0 L4 D* @$ y3 F9 ~3 R  printf("\tFont Index: %d\n", attrb.font);
3 l5 s& U4 k) j: z! N  m7 d  printf("\tDensity Index: %d\n", attrb.density);
" F* f" P3 B& }' \8 b}

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