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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, o' V* |; j; k1 z* b这功能其实很好用，比如选择面，自动显示面的法线等等。

$ @& W- j! |3 T1 [static void do_UGopen_api(void)
; z/ \6 I. ]( r) s{
  double pt1[3] = {0.0, 0.0, 0.0};
6 F% L" S$ ?* Q5 b4 T- w  double pt2[3] = {2.0, 2.0, 2.0};
  b1 Y' i- ?# |0 `  z  double pt3[3] = {-2.0,-2.0,-2.0};
' S. @' A$ q) u" [7 w2 ]: u! }  double vect1[3] = {1.0, 1.0, 1.0};
, f8 ?1 H, K$ r  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
0 {/ U5 U- _& v' O: W# r   /* Example to draw the vector with the base of its staff
      anchored at the origin so that the vector appears to point
/ O3 r4 T; J, `% M5 k      away from the origin
   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
- F' J+ {. q/ x. m/ E* J2 U1 s                   pt2, vect1, 0);
# d: d- F) v6 ~& L7 z  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
& x/ F3 G& t8 U% J, q/ @  /* Use color index three */
4 q/ F: o- t- X, a  attrb.color = 3;
  /* Update the current attribute settings */
# \3 E1 N  ]- q4 a  UF_DISP_set_conehead_attrb(&attrb);
; l" S) Q0 ]; ^3 ?: N/ D0 i8 @  printf("\nCurrent conhead display settings:\n");
* h1 e/ j7 Y. t+ ~  printf("\tLength of Staff: %g\n", attrb.staff_length);
  printf("\tTotal Length: %g\n", attrb.total_length);
3 ^! G" U) }! J4 ~! a: o, U: Q  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
8 p8 Y, V- n; X$ }9 h6 d  printf("\TColor Index: %d\n", attrb.color);
  printf("\tFont Index: %d\n", attrb.font);
& S' Q& [6 E+ _( R$ F. q  printf("\tDensity Index: %d\n", attrb.density);
}
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