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。

static void do_UGopen_api(void)
# w, u8 w- c# W{
' c9 X! J' k0 W  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
" P! S! B- c! s) C6 ^8 z9 c- K  double pt3[3] = {-2.0,-2.0,-2.0};
  double vect1[3] = {1.0, 1.0, 1.0};
( P4 E: A2 ]. ~% H( F: ?4 ?+ ^  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
/ ^$ u  y6 ], f7 n" @- @3 v      anchored at the origin so that the vector appears to point
7 i6 V; j/ r9 g8 g& ~. h6 g      away from the origin
   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
  ]- E5 E0 X- u0 a% y- w/ P8 n( g4 u                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
( g  r- W. k7 P: Z+ R7 Q, u9 L: w                           pt3, vect1, 0, "Normal");
7 J" U( Y' O# O2 u9 t  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
" D* t" q  G+ @( T  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
% Q- |' s  n& x  O* O  printf("\tTotal Length: %g\n", attrb.total_length);
  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
7 N7 ?% ?" d9 W0 r$ ?  x  printf("\TColor Index: %d\n", attrb.color);
  printf("\tFont Index: %d\n", attrb.font);
; Z' T, u, ?+ v9 t4 D  }* H  printf("\tDensity Index: %d\n", attrb.density);
}
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