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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# n6 b3 w% M/ R4 d( f6 a/ m4 w  u! \这功能其实很好用，比如选择面，自动显示面的法线等等。

  H4 m5 h, _, y9 j' c% Astatic void do_UGopen_api(void)
{
  double pt1[3] = {0.0, 0.0, 0.0};
- K' r' C  i" D: ?5 w$ G  double pt2[3] = {2.0, 2.0, 2.0};
  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,
7 N3 g$ w! ]4 K/ N: v# Y$ q                   pt1, vect1, 1);
/ m" E' R* c) f' M+ e. f  k   /* Example to draw the vector with the base of its staff
* O$ f5 N2 k7 v! ?8 y/ l2 }4 Z/ h% Y      anchored at the origin so that the vector appears to point
6 b( M" c5 m) r; r( K4 q      away from the origin
6 o) ]0 b2 [  p& J8 R; R3 U   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
/ ]' }5 u" |+ Y/ U4 n; g7 ^                   pt2, vect1, 0);
: B) [6 D+ q9 r0 N9 Y, f  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
' |3 C# j9 H+ I                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
* H3 u2 u. q5 W4 T; {1 b3 k: [5 [  attrb.color = 3;
  /* Update the current attribute settings */
, O7 f7 p% x+ A4 u! {  UF_DISP_set_conehead_attrb(&attrb);
0 ~0 i2 ^0 N6 G% k  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
: f7 e  ~, Z3 ?: L* x9 e  printf("\tTotal Length: %g\n", attrb.total_length);
  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
/ P# Z5 G1 q$ F* N  printf("\TColor Index: %d\n", attrb.color);
  printf("\tFont Index: %d\n", attrb.font);
  printf("\tDensity Index: %d\n", attrb.density);
}