_lwt_minTolerance()

static double _lwt_minTolerance ( LWGEOM *  g )

static

Definition at line 4981 of file lwgeom_topo.c.

References FP_ABS, lwgeom_get_bbox(), GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by lwt_AddPoint().

{
  const GBOX* gbox;
  double max;
  double ret;

  gbox = lwgeom_get_bbox(g);
  if ( ! gbox ) return 0; /* empty */
  max = FP_ABS(gbox->xmin);
  if ( max < FP_ABS(gbox->xmax) ) max = FP_ABS(gbox->xmax);
  if ( max < FP_ABS(gbox->ymin) ) max = FP_ABS(gbox->ymin);
  if ( max < FP_ABS(gbox->ymax) ) max = FP_ABS(gbox->ymax);

  ret = 3.6 * pow(10,  - ( 15 - log10(max?max:1.0) ) );

  return ret;
}

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