lwmsurface_linearize()

static LWMPOLY * lwmsurface_linearize ( const LWMSURFACE *  msurface, double  tol, LW_LINEARIZE_TOLERANCE_TYPE  type, int  flags  )

static

Parameters

msurface	input multi surface
tol	tolerance, semantic driven by tolerance_type
tolerance_type	see LW_LINEARIZE_TOLERANCE_TYPE
flags	see flags in lwarc_linearize

Returns

a newly allocated LWMPOLY

Definition at line 750 of file lwstroke.c.

{
        LWMPOLY *ogeom;
        LWGEOM *tmp;
        LWPOLY *poly;
        LWGEOM **polys;
        POINTARRAY **ptarray;
        uint32_t i, j;
 
        LWDEBUG(2, "lwmsurface_linearize called.");
 
        polys = lwalloc(sizeof(LWGEOM *)*msurface->ngeoms);
 
        for (i = 0; i < msurface->ngeoms; i++)
        {
                tmp = msurface->geoms[i];
                if (tmp->type == CURVEPOLYTYPE)
                {
                        polys[i] = (LWGEOM *)lwcurvepoly_linearize((LWCURVEPOLY *)tmp, tol, type, flags);
                }
                else if (tmp->type == POLYGONTYPE)
                {
                        poly = (LWPOLY *)tmp;
                        ptarray = lwalloc(sizeof(POINTARRAY *)*poly->nrings);
                        for (j = 0; j < poly->nrings; j++)
                        {
                                ptarray[j] = ptarray_clone_deep(poly->rings[j]);
                        }
                        polys[i] = (LWGEOM *)lwpoly_construct(msurface->srid, NULL, poly->nrings, ptarray);
                }
        }
        ogeom = (LWMPOLY *)lwcollection_construct(MULTIPOLYGONTYPE, msurface->srid, NULL, msurface->ngeoms, polys);
        return ogeom;
}

References CURVEPOLYTYPE, LWMSURFACE::geoms, lwalloc(), lwcollection_construct(), lwcurvepoly_linearize(), LWDEBUG, lwpoly_construct(), MULTIPOLYGONTYPE, LWMSURFACE::ngeoms, LWPOLY::nrings, POLYGONTYPE, ptarray_clone_deep(), LWPOLY::rings, LWMSURFACE::srid, and LWGEOM::type.

Referenced by lwcurve_linearize().

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