lwpoly_covers_lwline()

int lwpoly_covers_lwline	(	const LWPOLY *	poly,
		const LWLINE *	line
	)

Definition at line 2643 of file lwgeodetic.c.

References LW_FALSE, LW_TRUE, LWDEBUG, lwgeom_is_empty(), lwpoly_covers_pointarray(), and lwpoly_intersects_line().

Referenced by lwgeom_covers_lwgeom_sphere().

{
   /* Nulls and empties don't contain anything! */
   if ( ! poly || lwgeom_is_empty((LWGEOM*)poly) )
   {
           LWDEBUG(4,"returning false, geometry1 is empty or null");
           return LW_FALSE;
   }

   /* Nulls and empties don't contain anything! */
   if ( ! line || lwgeom_is_empty((LWGEOM*)line) )
   {
           LWDEBUG(4,"returning false, geometry2 is empty or null");
           return LW_FALSE;
   }

   if (LW_FALSE == lwpoly_covers_pointarray(poly, line->points))
   {
           LWDEBUG(4,"returning false, geometry2 has point outside of geometry1");
           return LW_FALSE;
   }

   /* check for any edge intersections, so nothing is partially outside of poly1 */
   if (LW_TRUE == lwpoly_intersects_line(poly, line->points))
   {
           LWDEBUG(4,"returning false, geometry2 is partially outside of geometry1");
           return LW_FALSE;
   }

   /* no abort condition found, so the poly2 should be completly inside poly1 */
   return LW_TRUE;
}

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