ring_make_geos_friendly()

POINTARRAY * ring_make_geos_friendly

(

POINTARRAY *

ring

)

Definition at line 142 of file liblwgeom/lwgeom_geos_clean.c.

{
        POINTARRAY* closedring;
        POINTARRAY* ring_in = ring;
 
        ptarray_strip_nan_coords_in_place(ring_in);
 
        /* close the ring if not already closed (2d only) */
        closedring = ptarray_close2d(ring);
        if (closedring != ring) ring = closedring;
 
        /* return 0 for collapsed ring (after closeup) */
 
        while (ring->npoints < 4)
        {
                POINTARRAY* oring = ring;
                LWDEBUGF(4, "ring has %d points, adding another", ring->npoints);
                /* let's add another... */
                ring = ptarray_addPoint(ring, getPoint_internal(ring, 0), FLAGS_NDIMS(ring->flags), ring->npoints);
                if (oring != ring_in) ptarray_free(oring);
        }
 
        return ring;
}

References POINTARRAY::flags, FLAGS_NDIMS, getPoint_internal(), LWDEBUGF, POINTARRAY::npoints, ptarray_addPoint(), ptarray_close2d(), ptarray_free(), and ptarray_strip_nan_coords_in_place().

Referenced by lwpoly_make_geos_friendly().

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