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。
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$ q0 {$ D8 |$ c0 @9 k6 Estatic void do_UGopen_api(void)
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, X' N8 ]& G) I  e6 j6 L; D  double pt1[3] = {0.0, 0.0, 0.0};
  double pt2[3] = {2.0, 2.0, 2.0};
  z- |; l- }  V" q" z9 n9 }6 n2 D, N  double pt3[3] = {-2.0,-2.0,-2.0};
' s6 X5 @; c) o, R5 _; v3 J  double vect1[3] = {1.0, 1.0, 1.0};
1 b0 R5 d' V+ C  |  UF_DISP_conehead_attrb_s attrb;
" C( |! C* _. V. E! x% D  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt1, vect1, 1);
+ r/ c8 i0 N  e   /* Example to draw the vector with the base of its staff
2 R1 s% r3 V! d( C! K: _      anchored at the origin so that the vector appears to point
      away from the origin
   */
  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
4 {- L2 P9 k/ ^. A7 ?2 G4 m                   pt2, vect1, 0);
# ?! y- Q" A# ^2 h& X$ s' Q8 }1 \  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                           pt3, vect1, 0, "Normal");
  UF_DISP_get_conehead_attrb(&attrb);
  /* Use color index three */
  attrb.color = 3;
  /* Update the current attribute settings */
2 G" @! T9 q' l4 l; S  UF_DISP_set_conehead_attrb(&attrb);
# D' B! q/ q% k  }' j% C" {% S  printf("\nCurrent conhead display settings:\n");
  printf("\tLength of Staff: %g\n", attrb.staff_length);
; O! s9 n' [& S  printf("\tTotal Length: %g\n", attrb.total_length);
) e) d7 f) a1 b: |) O) k" g  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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