lwcurvepoly_construct_from_lwpoly()

LWCURVEPOLY * lwcurvepoly_construct_from_lwpoly ( LWPOLY *  lwpoly )

extern

Construct an equivalent curve polygon from a polygon.

Curve polygons can have linear rings as their rings, so this works fine (in theory?)

Definition at line 52 of file lwcurvepoly.c.

{
        LWCURVEPOLY *ret;
        uint32_t i;
        ret = lwalloc(sizeof(LWCURVEPOLY));
        ret->type = CURVEPOLYTYPE;
        ret->flags = lwpoly->flags;
        ret->srid = lwpoly->srid;
        ret->nrings = lwpoly->nrings;
        ret->maxrings = lwpoly->nrings; /* Allocate room for sub-members, just in case. */
        ret->rings = lwalloc(ret->maxrings * sizeof(LWGEOM*));
        ret->bbox = lwpoly->bbox ? gbox_clone(lwpoly->bbox) : NULL;
        for ( i = 0; i < ret->nrings; i++ )
        {
                ret->rings[i] = lwline_as_lwgeom(lwline_construct(ret->srid, NULL, ptarray_clone_deep(lwpoly->rings[i])));
        }
        return ret;
}

References LWPOLY::bbox, LWCURVEPOLY::bbox, CURVEPOLYTYPE, LWPOLY::flags, LWCURVEPOLY::flags, gbox_clone(), lwalloc(), lwline_as_lwgeom(), lwline_construct(), LWCURVEPOLY::maxrings, LWPOLY::nrings, LWCURVEPOLY::nrings, ptarray_clone_deep(), LWPOLY::rings, LWCURVEPOLY::rings, LWPOLY::srid, LWCURVEPOLY::srid, and LWCURVEPOLY::type.

Referenced by lw_dist2d_circstring_poly(), lw_dist2d_poly_curvepoly(), and lwgeom_as_curve().

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