PostGIS  2.5.2dev-r@@SVN_REVISION@@

◆ hausdorffdistancedensify()

Datum hausdorffdistancedensify ( PG_FUNCTION_ARGS  )

Definition at line 224 of file postgis/lwgeom_geos.c.

References gserialized_is_empty(), HANDLE_GEOS_ERROR, lwgeom_geos_error(), PG_FUNCTION_INFO_V1(), POSTGIS2GEOS(), and ST_FrechetDistance().

Referenced by hausdorffdistance().

225 {
226  GSERIALIZED *geom1;
227  GSERIALIZED *geom2;
228  GEOSGeometry *g1;
229  GEOSGeometry *g2;
230  double densifyFrac;
231  double result;
232  int retcode;
233 
234  geom1 = PG_GETARG_GSERIALIZED_P(0);
235  geom2 = PG_GETARG_GSERIALIZED_P(1);
236  densifyFrac = PG_GETARG_FLOAT8(2);
237 
238  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
239  PG_RETURN_NULL();
240 
241  initGEOS(lwpgnotice, lwgeom_geos_error);
242 
243  g1 = POSTGIS2GEOS(geom1);
244  if (!g1)
245  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
246 
247  g2 = POSTGIS2GEOS(geom2);
248  if (!g2)
249  {
250  GEOSGeom_destroy(g1);
251  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
252  }
253 
254  retcode = GEOSHausdorffDistanceDensify(g1, g2, densifyFrac, &result);
255  GEOSGeom_destroy(g1);
256  GEOSGeom_destroy(g2);
257 
258  if (retcode == 0) HANDLE_GEOS_ERROR("GEOSHausdorffDistanceDensify");
259 
260  PG_FREE_IF_COPY(geom1, 0);
261  PG_FREE_IF_COPY(geom2, 1);
262 
263  PG_RETURN_FLOAT8(result);
264 }
int gserialized_is_empty(const GSERIALIZED *g)
Check if a GSERIALIZED is empty without deserializing first.
Definition: g_serialized.c:179
void lwgeom_geos_error(const char *fmt,...)
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
#define HANDLE_GEOS_ERROR(label)
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