acutBuildList (always returns a null pointer)!

[tianjie_328]

i want to choose entities with "acedSSGet", for example

..................

 pt1[X] =Max_x+0.002;
 pt1[Y] =Max_y+0.002;
 pt1[Z] =0.0;
 pt2[X] = Max_x+0.002;
 pt2[Y] = k*Max_x+p-0.002;
 pt2[Z] =0.0;
 pt3[X] = -0.002;
 pt3[Y] = p-0.002;
 pt3[Z] =0.0;
 pt4[X] = (Max_y-p)/k-0.002;
 pt4[Y] = Max_y+0.002;
   pt4[Z] =0.0;

struct resbuf *pointlist; //
  ads_name XZK; // 
 pointlist= acutBuildList(RTPOINT,pt1,RTPOINT,pt2,RTPOINT,pt3,RTPOINT,pt4,0);
  acedSSGet("WP",pointlist,NULL,NULL,XZK);

  long length;
  acedSSLength(XZK,&length);

  acutRelRb(pointlist);
  acedSSFree(XZK);

........................

 'pointlist' always  returns a null pointer,"acutBuildList"has special limitation?

[artc2]

I'm not sure if this will make a difference, but RTPOINT is for 2d points.  For 3d points you should use RT3DPOINT.

[tianjie_328]

thank you! i find the solution ,the entities choosed must be seen in the "windows" when using the "acutBuildList".

[artc2]

That doesn't make any sense at all.  acutBuildList doesn't know anything about the graphics window nor does it care.

But, points visible in the graphics window would indeed make a difference to the acedSSGet() call because that does only work with points visible in the current window.