Esempi in C++ (Cpp) per lwmpoly_add_lwpoly

Esempio n. 1

File: lwgeom_in_geojson.c Progetto: gravitystorm/postgis

static LWGEOM*
parse_geojson_multipolygon(json_object *geojson, bool *hasz,  int *root_srid)
{
	LWGEOM *geom = NULL;
	int i, j, k;
	json_object* poObjPolys = NULL;

	if (!*root_srid)
	{
		geom = (LWGEOM *)lwcollection_construct_empty(MULTIPOLYGONTYPE, *root_srid, 1, 0);
	}
	else
	{
		geom = (LWGEOM *)lwcollection_construct_empty(MULTIPOLYGONTYPE, -1, 1, 0);
	}

	poObjPolys = findMemberByName( geojson, "coordinates" );
	if ( ! poObjPolys )
		geojson_lwerror("Unable to find 'coordinates' in GeoJSON string", 4);

	if( json_type_array == json_object_get_type( poObjPolys ) )
	{
		const int nPolys = json_object_array_length( poObjPolys );

		for(i = 0; i < nPolys; ++i)
		{
			POINTARRAY **ppa;
			json_object* poObjPoly = NULL;
			poObjPoly = json_object_array_get_idx( poObjPolys, i );

			ppa = (POINTARRAY**) lwalloc(sizeof(POINTARRAY*));

			if( json_type_array == json_object_get_type( poObjPoly ) )
			{
				int nPoints;
				json_object* points = NULL;
				int ring = json_object_array_length( poObjPoly );
				ppa[0] = ptarray_construct_empty(1, 0, 1);

				points = json_object_array_get_idx( poObjPoly, 0 );
				nPoints = json_object_array_length( points );

				for (j=0; j < nPoints; j++ )
				{
					json_object* coords = NULL;
					coords = json_object_array_get_idx( points, j );
					parse_geojson_coord(coords, hasz, ppa[0]);
				}

				for(j = 1; j < ring; ++j)
				{
					int nPoints;
					ppa = (POINTARRAY**) lwrealloc((POINTARRAY *) ppa, sizeof(POINTARRAY*) * (j + 1));
					ppa[i] = ptarray_construct_empty(1, 0, 1);
					points = json_object_array_get_idx( poObjPoly, j );

					nPoints = json_object_array_length( points );
					for (k=0; k < nPoints; k++ )
					{
						json_object* coords = NULL;
						coords = json_object_array_get_idx( points, k );
						parse_geojson_coord(coords, hasz, ppa[i]);
					}
				}

				geom = (LWGEOM*)lwmpoly_add_lwpoly((LWMPOLY*)geom,
				                                   (LWPOLY*)lwpoly_construct(*root_srid, NULL, ring, ppa));
			}
		}
	}

	return geom;
}

Esempio n. 2

File: lwin_geojson.c Progetto: gbroccolo/postgis

static LWGEOM*
parse_geojson_multipolygon(json_object *geojson, int *hasz, int root_srid)
{
	LWGEOM *geom = NULL;
	int i, j, k;
	json_object* poObjPolys = NULL;

	if (!root_srid)
	{
		geom = (LWGEOM *)lwcollection_construct_empty(MULTIPOLYGONTYPE, root_srid, 1, 0);
	}
	else
	{
		geom = (LWGEOM *)lwcollection_construct_empty(MULTIPOLYGONTYPE, -1, 1, 0);
	}

	poObjPolys = findMemberByName( geojson, "coordinates" );
	if ( ! poObjPolys ) 
	{
		geojson_lwerror("Unable to find 'coordinates' in GeoJSON string", 4);
		return NULL;
	}

	if( json_type_array == json_object_get_type( poObjPolys ) )
	{
		const int nPolys = json_object_array_length( poObjPolys );

		for(i = 0; i < nPolys; ++i)
		{			
			json_object* poObjPoly = json_object_array_get_idx( poObjPolys, i );

			if( json_type_array == json_object_get_type( poObjPoly ) )
			{
				LWPOLY *lwpoly = lwpoly_construct_empty(geom->srid, lwgeom_has_z(geom), lwgeom_has_m(geom));
				int nRings = json_object_array_length( poObjPoly );
				
				for(j = 0; j < nRings; ++j)
				{
					json_object* points = json_object_array_get_idx( poObjPoly, j );
					
					if( json_type_array == json_object_get_type( points ) )
					{

						POINTARRAY *pa = ptarray_construct_empty(1, 0, 1);

						int nPoints = json_object_array_length( points );
						for ( k=0; k < nPoints; k++ )
						{
							json_object* coords = json_object_array_get_idx( points, k );
							parse_geojson_coord(coords, hasz, pa);
						}
						
						lwpoly_add_ring(lwpoly, pa);
					}
				}
				geom = (LWGEOM*)lwmpoly_add_lwpoly((LWMPOLY*)geom, lwpoly);
			}
		}
	}

	return geom;
}