PostGIS  2.1.10dev-r@@SVN_REVISION@@
Datum sfcgal_minkowski_sum ( PG_FUNCTION_ARGS  )

Definition at line 479 of file postgis/lwgeom_sfcgal.c.

References gserialized_get_srid(), POSTGIS2SFCGALGeometry(), result, sfcgal_postgis_init(), and SFCGALGeometry2POSTGIS().

480 {
481  GSERIALIZED *input0, *input1, *output;
482  sfcgal_geometry_t *geom0, *geom1;
483  sfcgal_geometry_t *result;
484  srid_t srid;
485 
487 
488  input0 = (GSERIALIZED*) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
489  srid = gserialized_get_srid(input0);
490  input1 = (GSERIALIZED*) PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
491  geom0 = POSTGIS2SFCGALGeometry(input0);
492  PG_FREE_IF_COPY(input0, 0);
493  geom1 = POSTGIS2SFCGALGeometry(input1);
494  PG_FREE_IF_COPY(input1, 1);
495 
496  result = sfcgal_geometry_minkowski_sum(geom0, geom1);
497  sfcgal_geometry_delete(geom0);
498  sfcgal_geometry_delete(geom1);
499 
500  output = SFCGALGeometry2POSTGIS(result, 0, srid);
501  sfcgal_geometry_delete(result);
502 
503  PG_RETURN_POINTER(output);
504 }
sfcgal_geometry_t * POSTGIS2SFCGALGeometry(GSERIALIZED *pglwgeom)
GSERIALIZED * SFCGALGeometry2POSTGIS(const sfcgal_geometry_t *geom, int force3D, int SRID)
char ** result
Definition: liblwgeom.h:218
void sfcgal_postgis_init(void)
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:70

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