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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4 g) B) Q2 T3 A9 O7 g* O这功能其实很好用，比如选择面，自动显示面的法线等等。

: Q+ q7 l+ D; |1 A4 Estatic void do_UGopen_api(void)
{
  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
% h4 m* f* J: w9 s" }! o1 _  double pt3[3] = {-2.0,-2.0,-2.0};
  double vect1[3] = {1.0, 1.0, 1.0};
) C) q& _( n0 U1 ~6 [  s: P  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   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
5 o% t5 R* p- G7 T      away from the origin
   */
/ P, X$ R' _" v5 x/ P  l  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
% A0 Q0 T6 X& ?                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
7 q3 r% l7 I6 Z, S1 S8 s                           pt3, vect1, 0, "Normal");
3 ]& ]# F$ k! _% P7 E: F  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
% U) w4 l$ o9 Z  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
4 c( P6 M: N/ \, Z7 p5 q  printf("\tTotal Length: %g\n", attrb.total_length);
  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
5 s! O2 @) ~- J9 L, G4 s9 G  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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