Ejemplos de lwgeom_set_effective_area en C++ (Cpp)

Ejemplo n.º 1

Archivo: lwgeom_functions_analytic.c Proyecto: dengxuyue/postgresql

Datum LWGEOM_SetEffectiveArea(PG_FUNCTION_ARGS)
{
	GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
	GSERIALIZED *result;
	int type = gserialized_get_type(geom);
	LWGEOM *in;
	LWGEOM *out;
	double area=0;
	int set_area=0;

	if ( type == POINTTYPE || type == MULTIPOINTTYPE )
		PG_RETURN_POINTER(geom);

	if ( (PG_NARGS()>1) && (!PG_ARGISNULL(1)) )
		area = PG_GETARG_FLOAT8(1);

	if ( (PG_NARGS()>2) && (!PG_ARGISNULL(2)) )
	set_area = PG_GETARG_INT32(2);

	in = lwgeom_from_gserialized(geom);

	out = lwgeom_set_effective_area(in,set_area, area);
	if ( ! out ) PG_RETURN_NULL();

	/* COMPUTE_BBOX TAINTING */
	if ( in->bbox ) lwgeom_add_bbox(out);

	result = geometry_serialize(out);
	lwgeom_free(out);
	PG_FREE_IF_COPY(geom, 0);
	PG_RETURN_POINTER(result);
}

Ejemplo n.º 2

Archivo: effectivearea.c Proyecto: NianYue/pipelinedb

static LWCOLLECTION* lwcollection_set_effective_area(const LWCOLLECTION *igeom,int set_area, double trshld)
{
	LWDEBUG(2, "Entered  lwcollection_set_effective_area");	
	int i;
	int set_m;
	if(set_area)
		set_m=1;
	else
		set_m=FLAGS_GET_M(igeom->flags);
	LWCOLLECTION *out = lwcollection_construct_empty(igeom->type, igeom->srid, FLAGS_GET_Z(igeom->flags), set_m);

	if( lwcollection_is_empty(igeom) )
		return out; /* should we return NULL instead ? */

	for( i = 0; i < igeom->ngeoms; i++ )
	{
		LWGEOM *ngeom = lwgeom_set_effective_area(igeom->geoms[i],set_area,trshld);
		if ( ngeom ) out = lwcollection_add_lwgeom(out, ngeom);
	}

	return out;
}