lw_dist2d_check_overlap()

int lw_dist2d_check_overlap	(	LWGEOM *	lwg1,
		LWGEOM *	lwg2
	)

We have to check for overlapping bboxes.

Definition at line 498 of file measures.c.

References LWGEOM::bbox, LW_FALSE, LW_TRUE, LWDEBUG, lwgeom_calculate_gbox(), GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by lw_dist2d_recursive().

{
        LWDEBUG(2, "lw_dist2d_check_overlap is called");
        if ( ! lwg1->bbox )
                lwgeom_calculate_gbox(lwg1, lwg1->bbox);
        if ( ! lwg2->bbox )
                lwgeom_calculate_gbox(lwg2, lwg2->bbox);

        /*Check if the geometries intersect.
        */
        if ((lwg1->bbox->xmax<lwg2->bbox->xmin||lwg1->bbox->xmin>lwg2->bbox->xmax||lwg1->bbox->ymax<lwg2->bbox->ymin||lwg1->bbox->ymin>lwg2->bbox->ymax))
        {
                LWDEBUG(3, "geometries bboxes did not overlap");
                return LW_FALSE;
        }
        LWDEBUG(3, "geometries bboxes overlap");
        return LW_TRUE;
}

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