gbox_overlaps_2d()

int gbox_overlaps_2d ( const GBOX *  g1, const GBOX *  g2  )

extern

Return LW_TRUE if the GBOX overlaps on the 2d plane, LW_FALSE otherwise.

Definition at line 323 of file gbox.c.

{
 
        /* Make sure our boxes are consistent */
        if ( FLAGS_GET_GEODETIC(g1->flags) != FLAGS_GET_GEODETIC(g2->flags) )
                lwerror("gbox_overlaps: cannot compare geodetic and non-geodetic boxes");
 
        /* Check X/Y first */
        if ( g1->xmax < g2->xmin || g1->ymax < g2->ymin ||
             g1->xmin > g2->xmax || g1->ymin > g2->ymax )
                return LW_FALSE;
 
        return LW_TRUE;
}

References GBOX::flags, FLAGS_GET_GEODETIC, LW_FALSE, LW_TRUE, lwerror(), GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by crosses(), disjoint(), mvt_safe_clip_polygon_by_box(), mvt_unsafe_clip_by_box(), overlaps(), ST_ClipByBox2d(), ST_Intersects(), and touches().

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