_lwt_CheckFacesExist()

static int _lwt_CheckFacesExist ( LWT_TOPOLOGY *  topo )

static

Definition at line 6683 of file lwgeom_topo.c.

{
  LWT_ISO_FACE *faces;
  int fields = LWT_COL_FACE_FACE_ID;
  int nelems = 1;
  GBOX qbox;
 
  qbox.xmin = qbox.ymin = -DBL_MAX;
  qbox.xmax = qbox.ymax = DBL_MAX;
  faces = lwt_be_getFaceWithinBox2D( topo, &qbox, &nelems, fields, 1);
  if ( nelems == -1 ) {
    lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
    return -1;
  }
  if ( faces ) _lwt_release_faces(faces, nelems);
  return nelems;
}

References _lwt_release_faces(), LWT_TOPOLOGY_T::be_iface, lwerror(), lwt_be_getFaceWithinBox2D(), lwt_be_lastErrorMessage(), LWT_COL_FACE_FACE_ID, GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by lwt_Polygonize().

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