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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6 u& Q% x4 ], B. `9 H- o3 `! V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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static void do_UGopen_api(void)
. C% X. n  l; }. V{
  double pt1[3] = {0.0, 0.0, 0.0};
4 x+ e, B6 v  l2 G. q1 G5 o/ q  double pt2[3] = {2.0, 2.0, 2.0};
1 }* g' I9 ~# l4 B  double pt3[3] = {-2.0,-2.0,-2.0};
. @! O6 Y" e* y$ L2 G! n  double vect1[3] = {1.0, 1.0, 1.0};
0 ]: Q, F0 Z. s; t: [( ~  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
      away from the origin
6 w6 G5 K; t- l5 P9 o' O   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
7 q! U3 F+ q4 X/ x, Z) s  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
  printf("\nCurrent conhead display settings:\n");
9 l1 g) V0 j8 N7 _' c4 |$ X/ `) J: k  printf("\tLength of Staff: %g\n", attrb.staff_length);
4 j4 w1 \) `. `( f6 d  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);
  printf("\tFont Index: %d\n", attrb.font);
  printf("\tDensity Index: %d\n", attrb.density);
}
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