Removed the reverse motion for ghosts

Yellow intersections added.

1 files changed, 31 insertions, 12 deletions

diff --git a/ghosts.c b/ghosts.c
index 61c1bb1..fe1a51f 100644
--- a/ghosts.c
+++ b/ghosts.c
@@ -77,19 +77,20 @@ static void change_position(struct ghost_type *ghost,
     switch(direction) {
     case left:
         --ghost->position.x;
-        return;
+        break;
     case right:
         ++ghost->position.x;
-        return;
+        break;
     case up:
         --ghost->position.y;
-        return;
+        break;
     case down:
         ++ghost->position.y;
-        return;
+        break;
     default:
         return;
     }
+    change_point_if_outside_tunnel(&ghost->position);
 }
 
 void make_ghost_moves(game_space field,
@@ -215,12 +216,14 @@ static void clear_both_queues(struct queue *next_points,
     queue_clear(reviewed_points);
 }
 
-static int is_bfs_search_for_orange(enum search_flag current_width,
-                                    int move_count)
+static int is_bfs_search_for_orange(enum search_flag *current_width,
+                                    int *move_count)
 {
-    if(current_width == not_viewed)
-        ++move_count;
-    return move_count > orange_search_limit;
+    if(*current_width == not_viewed) {
+        ++*move_count;
+        *current_width = viewed;
+    }
+    return *move_count > orange_search_limit;
 }
 
 void breadth_first_search(game_space field, struct ghost_type *ghost,
@@ -228,15 +231,23 @@ void breadth_first_search(game_space field, struct ghost_type *ghost,
 {
     int move_count;
     enum search_flag current_width = not_viewed;
+    enum movement_direction reverse_direction;
     struct coordinates consider_point, near_point;
     struct coordinates start_point = { ghost->position.y, ghost->position.x };
     struct queue next_points, reviewed_points;
     move_count = 0;
+    reverse_direction = ghost->direction;
+    reverse_direction ^= 1;
     queue_init(&next_points);
     queue_init(&reviewed_points);
     queue_push(&next_points, &target_point);
     queue_push(&reviewed_points, &target_point);
     while(!empty(&next_points)) {
+        if(ghost->position.x == target_point.x &&
+                ghost->position.y == target_point.y) {
+            ghost->direction=none;
+            break;
+        }
         consider_point = queue_front(&next_points);
         pop(&next_points);
         int dx;
@@ -246,22 +257,30 @@ void breadth_first_search(game_space field, struct ghost_type *ghost,
                 if(dx != 0 && dy != 0)
                     continue;
                 near_point = get_near_point(consider_point, dx, dy);
+                change_point_if_outside_tunnel(&near_point);
                 if(is_obstacle(field, near_point.x, near_point.y))
                     continue;
                 if(queue_consists_point(&reviewed_points, near_point))
                     continue;
                 if(equal_points(start_point, near_point)) {
-                    if(ghost->color == orange)
-                        if(!is_bfs_search_for_orange(current_width,
-                                                     move_count)) {
+                    if(ghost->color == orange) {
+                        if(!is_bfs_search_for_orange(&current_width,
+                                                     &move_count)) {
                             redirect(field, two_paths, ghost,
                                      ghost->home_position,
                                      compute_distance_between_points);
                             clear_both_queues(&next_points, &reviewed_points);
                             return;
                         }
+                    }
                     ghost->direction =
                         find_direction(consider_point, start_point);
+#if 1
+                    if(ghost->direction == reverse_direction) {
+                        queue_push(&reviewed_points, &consider_point);
+                        continue;
+                    }
+#endif
                     clear_both_queues(&next_points, &reviewed_points);
                     return;
                 }