lwcollection_clip_to_ordinate_range()

static LWCOLLECTION * lwcollection_clip_to_ordinate_range ( const LWCOLLECTION *  icol, char  ordinate, double  from, double  to  )

inlinestatic

Clip an input COLLECTION between two values, on any ordinate input.

Definition at line 792 of file lwlinearreferencing.c.

{
        LWCOLLECTION *lwgeom_out;
 
        assert(icol);
        if (icol->ngeoms == 1)
                lwgeom_out = lwgeom_clip_to_ordinate_range(icol->geoms[0], ordinate, from, to, 0);
        else
        {
                LWCOLLECTION *col;
                char hasz = lwgeom_has_z(lwcollection_as_lwgeom(icol));
                char hasm = lwgeom_has_m(lwcollection_as_lwgeom(icol));
                uint32_t i;
                lwgeom_out = lwcollection_construct_empty(icol->type, icol->srid, hasz, hasm);
                FLAGS_SET_Z(lwgeom_out->flags, hasz);
                FLAGS_SET_M(lwgeom_out->flags, hasm);
                for (i = 0; i < icol->ngeoms; i++)
                {
                        col = lwgeom_clip_to_ordinate_range(icol->geoms[i], ordinate, from, to, 0);
                        if (col)
                        {
                                if (col->type != icol->type)
                                        lwgeom_out->type = COLLECTIONTYPE;
                                lwgeom_out = lwcollection_concat_in_place(lwgeom_out, col);
                                lwfree(col->geoms);
                                lwcollection_release(col);
                        }
                }
        }
 
        if (icol->bbox)
                lwgeom_refresh_bbox((LWGEOM *)lwgeom_out);
 
        return lwgeom_out;
}

References LWCOLLECTION::bbox, COLLECTIONTYPE, LWCOLLECTION::flags, FLAGS_SET_M, FLAGS_SET_Z, LWCOLLECTION::geoms, lwcollection_as_lwgeom(), lwcollection_concat_in_place(), lwcollection_construct_empty(), lwcollection_release(), lwfree(), lwgeom_clip_to_ordinate_range(), lwgeom_has_m(), lwgeom_has_z(), lwgeom_refresh_bbox(), LWCOLLECTION::ngeoms, LWCOLLECTION::srid, and LWCOLLECTION::type.

Referenced by lwgeom_clip_to_ordinate_range().

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