added some utility

1 files changed, 5 insertions, 4 deletions

diff --git a/pacman-c++/constants.h b/pacman-c++/constants.h
index e7755d4..8977b08 100644
--- a/pacman-c++/constants.h
+++ b/pacman-c++/constants.h
@@ -39,12 +39,13 @@ namespace Transmission
   const field_t point      = (1 << 4);
   const field_t bonuspoint = (1 << 5);
   const field_t pacman     = (1 << 6);
+  const field_t empty      = (1 << 7); // explicit empty for update
 
   const field_t direction_none  = 0;
-  const field_t direction_left  = (1 << 7);
-  const field_t direction_right = (1 << 8);
-  const field_t direction_up    = (1 << 9);
-  const field_t direction_down  = (1 << 10);
+  const field_t direction_left  = (1 << 8);
+  const field_t direction_right = (1 << 9);
+  const field_t direction_up    = (1 << 10);
+  const field_t direction_down  = (1 << 11);
 
   const mask_t color_mask = Color::none | Color::red | Color::blue | Color::green;
   const mask_t type_mask = block | bonuspoint;