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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! q/ M5 J" D6 k* J' s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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: F1 x  _2 _' l- ^static void do_UGopen_api(void)
{
/ l8 i5 S3 k+ T* C3 Y  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};
  UF_DISP_conehead_attrb_s attrb;
7 G7 y! A' U$ m3 M5 l  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
3 K& D9 m5 ^, j' L6 c! y# u   /* Example to draw the vector with the base of its staff
8 ?% }, r: s5 Y. s5 @- u: w- E+ |      anchored at the origin so that the vector appears to point
- u5 J& M% k# e6 F& I, N* R      away from the origin
   */
. u# z) m5 E8 Q# k* X2 n8 Q) h  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
$ f* O" U2 B5 @& t- |' T                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
; Y' X. F1 W" R0 X  Q  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
  ^! I$ L. K6 w+ {7 o  attrb.color = 3;
7 M0 R7 Z' k7 ]( u; C$ s9 d+ @, _  /* Update the current attribute settings */
1 G/ t/ b/ \5 U, k. h  UF_DISP_set_conehead_attrb(&attrb);
: l6 a% l. q$ N& ?  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
  printf("\tTotal Length: %g\n", attrb.total_length);
& W0 }! z4 ^5 b+ ^% q2 |  printf("\tRadius of Cone Base: %g\n", attrb.cone_radius);
/ g. o1 y) H) U$ j# f. P% k  printf("\TColor Index: %d\n", attrb.color);
0 l  [& y' r5 p3 D% E$ y  printf("\tFont Index: %d\n", attrb.font);
, |* M1 [% m' Q( w1 p7 `  printf("\tDensity Index: %d\n", attrb.density);
}
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