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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  X3 o' s0 Y4 R1 l  _3 Z, Istatic void do_UGopen_api(void)
{
0 I1 j* J, l+ O0 S* [: v% {7 a  double pt1[3] = {0.0, 0.0, 0.0};
# r- Y" |7 j3 v' h; {$ e' M  double pt2[3] = {2.0, 2.0, 2.0};
. y- O' B% f6 z4 M  double pt3[3] = {-2.0,-2.0,-2.0};
4 Z! D4 H6 \8 f  double vect1[3] = {1.0, 1.0, 1.0};
$ T/ U' E& C2 k6 Z0 |) [, K  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
: N. l. s+ `2 |$ H1 k. Z, g                   pt1, vect1, 1);
+ O8 N9 k. M) U6 N+ ?4 q9 h3 y4 \   /* 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,
% {4 Z0 D% v! O# o) Z                   pt2, vect1, 0);
. t% N' m3 i5 a3 F9 e  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
7 y4 {! h$ S8 z% z- t  /* Use color index three */
! c: C6 g) X' k% k/ B2 R% m: _  attrb.color = 3;
  /* Update the current attribute settings */
% d5 q* b6 X" O+ F# r3 H& a  UF_DISP_set_conehead_attrb(&attrb);
, a- g" i3 q! `" \  printf("\nCurrent conhead display settings:\n");
% f: y. m! E. J  printf("\tLength of Staff: %g\n", attrb.staff_length);
; \2 c0 J* j$ Z) v' g/ g  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);
  printf("\tDensity Index: %d\n", attrb.density);
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