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)
9 n. h& H5 m. ]+ `$ A{
0 _0 E( P; m9 K0 T8 a  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
, M+ S+ _2 }  w  s  double pt3[3] = {-2.0,-2.0,-2.0};
  double vect1[3] = {1.0, 1.0, 1.0};
* b2 o6 t$ q* ~+ H! G5 S* Y  UF_DISP_conehead_attrb_s attrb;
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
0 w8 \6 d3 J/ }# d0 `( K$ k% h   /* 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
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  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
- N5 _! @2 f) Q; q6 u                   pt2, vect1, 0);
$ n! i! z- o" Y/ m: d" u% L  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
: ?+ O1 t, S" d  N( n" F                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
  attrb.color = 3;
. ~! {: l& U! e% x  /* 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);
1 i: x$ k# w1 Q  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);
, Y8 [: o9 ?# ~+ x; l  printf("\tFont Index: %d\n", attrb.font);
: N3 l4 e6 _) N7 K. {  printf("\tDensity Index: %d\n", attrb.density);
}

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