Removed the reverse motion for ghosts

Yellow intersections added.

1 files changed, 9 insertions, 0 deletions

diff --git a/pacman.c b/pacman.c
index f2e0161..95d121d 100644
--- a/pacman.c
+++ b/pacman.c
@@ -13,6 +13,13 @@ enum {
     count_get_out_moves = 5
 };
 
+static int is_up_move_blocked(const struct ghost_type *ghost,
+                              enum intersection_type intersection)
+{
+    return intersection == yellow_block && (ghost->direction == left ||
+            ghost->direction == right);
+}
+
 static void pathfinder_stage(game_space field, struct pacman pac,
                              struct ghost_type *red_ghost,
                              struct ghost_type *pink_ghost,
@@ -48,6 +55,8 @@ static void pathfinder_stage(game_space field, struct pacman pac,
             break;
         }
         intersection = get_intersection(field, current_ghost);
+        if(is_up_move_blocked(current_ghost, intersection))
+            continue;
         if(intersection != direct_path)
             redirect(field, intersection, current_ghost, target_point,
                      search_method);