lwpoly_filterm()

static LWPOLY* lwpoly_filterm ( LWPOLY *  poly, double  min, double  max, int  returnm  )

static

Definition at line 115 of file lwmval.c.

{
        LWDEBUGF(2, "Entered %s", __func__);
        int i, nrings;
        LWPOLY *poly_res = lwpoly_construct_empty(poly->srid, FLAGS_GET_Z(poly->flags),returnm * FLAGS_GET_M(poly->flags));
 
        nrings = poly->nrings;
        for( i = 0; i < nrings; i++ )
        {
                /* Ret number of points */
                POINTARRAY *pa = ptarray_filterm(poly->rings[i], min, max,returnm);
 
                /* Skip empty rings */
                if( pa == NULL )
                        continue;
 
                if(pa->npoints>=4)
                {
                        if (lwpoly_add_ring(poly_res, pa) == LW_FAILURE )
                        {
                                LWDEBUG(2, "Unable to add ring to polygon");
                                lwerror("Unable to add ring to polygon");
                        }
                }
                else if (i==0)
                {
                        ptarray_free(pa);
                        lwpoly_free(poly_res);
                        return NULL;
                }
                else
                        ptarray_free(pa);
        }
        return poly_res;
}

References LWPOLY::flags, FLAGS_GET_M, FLAGS_GET_Z, LW_FAILURE, LWDEBUG, LWDEBUGF, lwerror(), lwpoly_add_ring(), lwpoly_construct_empty(), lwpoly_free(), POINTARRAY::npoints, LWPOLY::nrings, ptarray_filterm(), ptarray_free(), LWPOLY::rings, and LWPOLY::srid.

Referenced by lwgeom_filter_m_ignore_null().

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