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。
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, H# u# {$ x, d& S, d# zstatic 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};
9 t$ a0 l* Z# t* P8 d; V- a  double vect1[3] = {1.0, 1.0, 1.0};
/ U% z3 M9 R! @+ r. @; J  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
, P; X! n" }6 h1 y; m* I   /* Example to draw the vector with the base of its staff
  s4 j1 u, a& e: ~3 ]      anchored at the origin so that the vector appears to point
7 ~0 v: w- {! C" ^6 J, E7 d2 ^      away from the origin
   */
6 w# M$ ~+ B( N# g  D  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
* h& c  d, e6 o' c1 r  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
! c% i- ]6 ], b  @0 M  UF_DISP_get_conehead_attrb(&attrb);
& G" h6 e0 J( k3 G7 {" Y7 K* S% i  /* Use color index three */
  attrb.color = 3;
, E, H+ _2 V: ~1 q9 U- w  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
  printf("\nCurrent conhead display settings:\n");
) }" u$ K3 O3 s0 l2 N  printf("\tLength of Staff: %g\n", attrb.staff_length);
  printf("\tTotal Length: %g\n", attrb.total_length);
/ g- B2 O& P, G7 c. G& k4 r3 ?  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
  printf("\TColor Index: %d\n", attrb.color);
% q  H. M+ z* Q) y' I' _  printf("\tFont Index: %d\n", attrb.font);
# ^! m8 d: O$ [- o  printf("\tDensity Index: %d\n", attrb.density);
}
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