RTreeMergeMultiLines()

static LWMLINE* RTreeMergeMultiLines ( LWMLINE *  line1, LWMLINE *  line2  )

static

Merges two multilinestrings into a single multilinestring.

Definition at line 282 of file lwgeom_rtree.c.

{
        LWGEOM **geoms;
        LWCOLLECTION *col;
        uint32_t i, j, ngeoms;
 
        POSTGIS_DEBUGF(2, "RTreeMergeMultiLines called on %p, %d, %d; %p, %d, %d", line1, line1->ngeoms, line1->type, line2, line2->ngeoms, line2->type);
 
        ngeoms = line1->ngeoms + line2->ngeoms;
        geoms = lwalloc(sizeof(LWGEOM *) * ngeoms);
 
        j = 0;
        for (i = 0; i < line1->ngeoms; i++, j++)
        {
                geoms[j] = lwgeom_clone((LWGEOM *)line1->geoms[i]);
        }
        for (i = 0; i < line2->ngeoms; i++, j++)
        {
                geoms[j] = lwgeom_clone((LWGEOM *)line2->geoms[i]);
        }
        col = lwcollection_construct(MULTILINETYPE, SRID_UNKNOWN, NULL, ngeoms, geoms);
 
        POSTGIS_DEBUGF(3, "RTreeMergeMultiLines returning %p, %d, %d", col, col->ngeoms, col->type);
 
        return (LWMLINE *)col;
}

References LWMLINE::geoms, lwalloc(), lwcollection_construct(), lwgeom_clone(), MULTILINETYPE, LWMLINE::ngeoms, LWCOLLECTION::ngeoms, SRID_UNKNOWN, LWMLINE::type, and LWCOLLECTION::type.

Referenced by RTreeFindLineSegments().

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