PostGIS  2.5.0dev-r@@SVN_REVISION@@

◆ ST_DelaunayTriangles()

Datum ST_DelaunayTriangles ( PG_FUNCTION_ARGS  )

Definition at line 3284 of file postgis/lwgeom_geos.c.

References dumpnode::geom, geometry_serialize(), lwgeom_delaunay_triangulation(), lwgeom_free(), lwgeom_from_gserialized(), PG_FUNCTION_INFO_V1(), and ST_Snap().

Referenced by ST_BuildArea().

3285 {
3286  GSERIALIZED *result;
3287  GSERIALIZED *geom;
3288  LWGEOM *lwgeom_in, *lwgeom_out;
3289  double tolerance = 0.0;
3290  int flags = 0;
3291 
3292  geom = PG_GETARG_GSERIALIZED_P(0);
3293  tolerance = PG_GETARG_FLOAT8(1);
3294  flags = PG_GETARG_INT32(2);
3295 
3296  lwgeom_in = lwgeom_from_gserialized(geom);
3297  lwgeom_out = lwgeom_delaunay_triangulation(lwgeom_in, tolerance, flags);
3298  lwgeom_free(lwgeom_in) ;
3299 
3300  if ( ! lwgeom_out )
3301  {
3302  PG_FREE_IF_COPY(geom, 0);
3303  PG_RETURN_NULL();
3304  }
3305 
3306  result = geometry_serialize(lwgeom_out) ;
3307  lwgeom_free(lwgeom_out) ;
3308 
3309  PG_FREE_IF_COPY(geom, 0);
3310  PG_RETURN_POINTER(result);
3311 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1144
LWGEOM * lwgeom_delaunay_triangulation(const LWGEOM *geom, double tolerance, int32_t edgeOnly)
Take vertices of a geometry and build a delaunay triangulation on them.
LWGEOM * geom
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
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