lwgeom_to_basic_type()

static LWGEOM * lwgeom_to_basic_type ( LWGEOM *  geom, uint8  original_type  )

inlinestatic

In place process a collection to find a concrete geometry object and expose that as the actual object.

Will some geom be lost? Sure, but your MVT renderer couldn't draw it anyways.

Definition at line 823 of file mvt.c.

{
        LWGEOM *geom_out = geom;
        if (lwgeom_get_type(geom) == COLLECTIONTYPE)
        {
                LWCOLLECTION *g = (LWCOLLECTION*)geom;
                geom_out = (LWGEOM *)lwcollection_extract(g, original_type);
        }
 
        /* If a collection only contains 1 geometry return than instead */
        if (lwgeom_is_collection(geom_out))
        {
                LWCOLLECTION *g = (LWCOLLECTION *)geom_out;
                if (g->ngeoms == 1)
                {
                        geom_out = g->geoms[0];
                }
        }
 
        geom_out->srid = geom->srid;
        return geom_out;
}

References COLLECTIONTYPE, LWCOLLECTION::geoms, lwcollection_extract(), lwgeom_get_type(), lwgeom_is_collection(), LWCOLLECTION::ngeoms, and LWGEOM::srid.

Referenced by mvt_clip_and_validate(), mvt_geom(), mvt_grid_and_validate_geos(), and mvt_iterate_clip_by_box_geos().

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