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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" s5 _* b4 R0 R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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  K( N+ d4 y; S. b1 Istatic void do_UGopen_api(void)
% _6 d5 f5 j4 Q$ ]3 b{
  double pt1[3] = {0.0, 0.0, 0.0};
: k' }$ ^* j; T+ ?  F  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;
- _+ K9 `) W0 V2 n9 o5 g. r- V  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
4 b! Y7 |% D- D; T; Z2 n) j                   pt1, vect1, 1);
: j4 O; i8 V3 P$ v- m$ f   /* Example to draw the vector with the base of its staff
      anchored at the origin so that the vector appears to point
( A' D9 P8 K1 e1 g1 D      away from the origin
; \5 s) t% K$ x* Y, }7 O/ u   */
) x  i& H5 e% B* h) Y% E  UF_DISP_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
                   pt2, vect1, 0);
- _! j: t/ s# i, _8 F: F* x  UF_DISP_labeled_conehead(UF_DISP_ALL_ACTIVE_VIEWS,
( u  a1 v: n' q- j8 m: P. i                           pt3, vect1, 0, "Normal");
$ u1 E; A! Q8 o- b/ _% K, L  UF_DISP_get_conehead_attrb(&attrb);
+ M7 R: a& W) |) }8 ]  /* Use color index three */
  attrb.color = 3;
  /* Update the current attribute settings */
  UF_DISP_set_conehead_attrb(&attrb);
4 [+ A& h% i9 x: J& c  printf("\nCurrent conhead display settings:\n");
( U& o* S) Y. }) u8 Z7 ~  printf("\tLength of Staff: %g\n", attrb.staff_length);
  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);
( p3 d. z; }% ]7 L  r4 Q* Y" _% J* ~  printf("\tDensity Index: %d\n", attrb.density);
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