163 	DIAGDIRDIFF_90RIGHT = 1,        ///< 90 degrees right

   163 	DIAGDIRDIFF_90RIGHT = 1,        ///< 90 degrees right

   164 	DIAGDIRDIFF_REVERSE = 2,        ///< Reverse directions

   164 	DIAGDIRDIFF_REVERSE = 2,        ///< Reverse directions

   165 	DIAGDIRDIFF_90LEFT  = 3         ///< 90 degrees left

   165 	DIAGDIRDIFF_90LEFT  = 3         ///< 90 degrees left

   166 };

   166 };

   167 

   167 

   168 /**

   171 /**

   169  * Applies a difference on a DiagDirection

   172  * Applies a difference on a DiagDirection

   170  *

   173  *

   171  * This function applies a difference on a DiagDirection and returns

   174  * This function applies a difference on a DiagDirection and returns

   172  * the new DiagDirection.

   175  * the new DiagDirection.