lwcompound_linearize()

static LWLINE* lwcompound_linearize ( const LWCOMPOUND *  icompound, double  tol, LW_LINEARIZE_TOLERANCE_TYPE  tolerance_type, int  flags  )

static

Definition at line 473 of file lwstroke.c.

{
        LWGEOM *geom;
        POINTARRAY *ptarray = NULL, *ptarray_out = NULL;
        LWLINE *tmp = NULL;
        uint32_t i, j;
        POINT4D p;
 
        LWDEBUG(2, "lwcompound_stroke called.");
 
        ptarray = ptarray_construct_empty(FLAGS_GET_Z(icompound->flags), FLAGS_GET_M(icompound->flags), 64);
 
        for (i = 0; i < icompound->ngeoms; i++)
        {
                geom = icompound->geoms[i];
                if (geom->type == CIRCSTRINGTYPE)
                {
                        tmp = lwcircstring_linearize((LWCIRCSTRING *)geom, tol, tolerance_type, flags);
                        for (j = 0; j < tmp->points->npoints; j++)
                        {
                                getPoint4d_p(tmp->points, j, &p);
                                ptarray_append_point(ptarray, &p, LW_TRUE);
                        }
                        lwline_free(tmp);
                }
                else if (geom->type == LINETYPE)
                {
                        tmp = (LWLINE *)geom;
                        for (j = 0; j < tmp->points->npoints; j++)
                        {
                                getPoint4d_p(tmp->points, j, &p);
                                ptarray_append_point(ptarray, &p, LW_TRUE);
                        }
                }
                else
                {
                        lwerror("Unsupported geometry type %d found.",
                                geom->type, lwtype_name(geom->type));
                        return NULL;
                }
        }
        ptarray_out = ptarray_remove_repeated_points(ptarray, 0.0);
        ptarray_free(ptarray);
        return lwline_construct(icompound->srid, NULL, ptarray_out);
}

References CIRCSTRINGTYPE, LWCOMPOUND::flags, FLAGS_GET_M, FLAGS_GET_Z, LWCOMPOUND::geoms, getPoint4d_p(), LINETYPE, LW_TRUE, lwcircstring_linearize(), LWDEBUG, lwerror(), lwline_construct(), lwline_free(), lwtype_name(), LWCOMPOUND::ngeoms, POINTARRAY::npoints, LWLINE::points, ptarray_append_point(), ptarray_construct_empty(), ptarray_free(), ptarray_remove_repeated_points(), LWCOMPOUND::srid, and LWGEOM::type.

Referenced by lwcollection_linearize(), lwcompound_stroke(), lwcurve_linearize(), lwcurvepoly_linearize(), and lwmcurve_linearize().

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