lwgeom_filter_m()

LWGEOM* lwgeom_filter_m	(	LWGEOM *	geom,
		double	min,
		double	max,
		int	returnm
	)

Definition at line 221 of file lwmval.c.

{
        LWDEBUGF(2, "Entered %s",__func__);
 
        LWGEOM *ngeom = lwgeom_filter_m_ignore_null(geom,min, max,returnm);
 
        if(ngeom)
                return ngeom;
        else
        {
                switch ( geom->type )
                {
                        case POINTTYPE:
                        {
                                return (LWGEOM*) lwpoint_construct_empty(geom->srid, FLAGS_GET_Z(geom->flags), returnm * FLAGS_GET_M(geom->flags));
                                break;
                        }
                        case LINETYPE:
                        {
                                return (LWGEOM*) lwline_construct_empty(geom->srid, FLAGS_GET_Z(geom->flags), returnm * FLAGS_GET_M(geom->flags));
                                break;
                        }
                        /* Polygon has 'nrings' and 'rings' elements */
                        case POLYGONTYPE:
                        {
                                return (LWGEOM*) lwpoly_construct_empty(geom->srid, FLAGS_GET_Z(geom->flags), returnm * FLAGS_GET_M(geom->flags));
                                break;
                        }
 
                        /* All these Collection types have 'ngeoms' and 'geoms' elements */
                        case MULTIPOINTTYPE:
                        case MULTILINETYPE:
                        case MULTIPOLYGONTYPE:
                        case COLLECTIONTYPE:
                        {
                                return (LWGEOM*) lwcollection_construct_empty(geom->type, geom->srid, FLAGS_GET_Z(geom->flags), returnm * FLAGS_GET_M(geom->flags));
                                break;
                        }
                        /* Unknown type! */
                        default:
                                lwerror("%s: Unsupported geometry type: %s", __func__, lwtype_name(geom->type));
                }
        }
        /*Shouldn't be possible*/
        return NULL;
}

References COLLECTIONTYPE, LWGEOM::flags, FLAGS_GET_M, FLAGS_GET_Z, LINETYPE, lwcollection_construct_empty(), LWDEBUGF, lwerror(), lwgeom_filter_m_ignore_null(), lwline_construct_empty(), lwpoint_construct_empty(), lwpoly_construct_empty(), lwtype_name(), MULTILINETYPE, MULTIPOINTTYPE, MULTIPOLYGONTYPE, POINTTYPE, POLYGONTYPE, LWGEOM::srid, and LWGEOM::type.

Referenced by do_test_filterm(), and LWGEOM_FilterByM().

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