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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static 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};
  double vect1[3] = {1.0, 1.0, 1.0};
! \! i5 l2 E# n  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
3 V( j  O9 o7 _2 ]! n( B2 i4 ^                   pt1, vect1, 1);
$ [+ E, K8 }$ P  m! P, J3 K; J   /* Example to draw the vector with the base of its staff
      anchored at the origin so that the vector appears to point
. {7 n& _6 r# w& U% O. o      away from the origin
   */
# k; Q7 c3 O' w  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
& B: U+ s( |8 W7 H  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
9 C9 F2 P$ I& e2 N  attrb.color = 3;
  /* Update the current attribute settings */
7 @) C' _5 T" ]6 T2 j) B# ?& v0 T  UF_DISP_set_conehead_attrb(&attrb);
8 [1 `# B# y7 P3 G2 }8 R, m  printf("\nCurrent conhead display settings:\n");
  v+ O1 d2 G" p  L) D$ {1 t; `" k  printf("\tLength of Staff: %g\n", attrb.staff_length);
; K) b( c: F7 i  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);
% k2 D# Z7 z& B7 w/ v3 f  printf("\tFont Index: %d\n", attrb.font);
  printf("\tDensity Index: %d\n", attrb.density);
}

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