mvt_clip_and_validate_geos()

static LWGEOM* mvt_clip_and_validate_geos ( LWGEOM *  lwgeom, uint8_t  basic_type, uint32_t  extent, uint32_t  buffer, bool  clip_geom  )

static

Definition at line 846 of file mvt.c.

{
        LWGEOM *ng = lwgeom;
        assert(lwgeom->type != POLYGONTYPE);
        assert(lwgeom->type != MULTIPOLYGONTYPE);
 
        if (clip_geom)
        {
                gridspec grid = {0, 0, 0, 0, 1, 1, 0, 0};
                GBOX bgbox;
                bgbox.xmax = bgbox.ymax = (double)extent + (double)buffer;
                bgbox.xmin = bgbox.ymin = -(double)buffer;
                FLAGS_SET_GEODETIC(bgbox.flags, 0);
 
                ng = mvt_unsafe_clip_by_box(ng, &bgbox);
 
                /* Make sure there is no pending float values (clipping can do that) */
                lwgeom_grid_in_place(ng, &grid);
        }
 
        return ng;
}

References buffer(), GBOX::flags, FLAGS_SET_GEODETIC, lwgeom_grid_in_place(), MULTIPOLYGONTYPE, mvt_unsafe_clip_by_box(), POLYGONTYPE, LWGEOM::type, GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by mvt_clip_and_validate().

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