Capture and liberation of ghosts

Fixed coordinate in field_has_coin.
Added marks on the field for the liberation zone (1 in front of #).
Prison parameters for the ghost are set.
Fixed condition in BFS search (additionally exclude the current point in the
loop, dx == 0 && dy == 0).

1 files changed, 84 insertions, 5 deletions

diff --git a/ghosts.c b/ghosts.c
index f8edfa2..20d19dd 100644
--- a/ghosts.c
+++ b/ghosts.c
@@ -19,6 +19,11 @@ void initialize_ghost(struct ghost_type *ghost, enum ghost_color color)
         ghost->color = red;
         ghost->frightened_status = 0;
         ghost->direction = none;
+        ghost->prison_params.position.x = red_home_x;
+        ghost->prison_params.position.y = red_home_y;
+        ghost->prison_params.prison_counter = 0;
+        ghost->prison_params.active = 0;
+        ghost->capture_info.status = 0;
         break;
     case pink:
         ghost->position.y = pink_y;
@@ -28,6 +33,11 @@ void initialize_ghost(struct ghost_type *ghost, enum ghost_color color)
         ghost->color = pink;
         ghost->frightened_status = 0;
         ghost->direction = none;
+        ghost->prison_params.position.x = pink_home_x;
+        ghost->prison_params.position.y = pink_home_y;
+        ghost->prison_params.prison_counter = 0;
+        ghost->prison_params.active = 0;
+        ghost->capture_info.status = 0;
         break;
     case blue:
         ghost->position.y = blue_y;
@@ -37,6 +47,11 @@ void initialize_ghost(struct ghost_type *ghost, enum ghost_color color)
         ghost->color = blue;
         ghost->frightened_status = 0;
         ghost->direction = none;
+        ghost->prison_params.position.x = blue_home_x;
+        ghost->prison_params.position.y = blue_home_y;
+        ghost->prison_params.prison_counter = 0;
+        ghost->prison_params.active = 0;
+        ghost->capture_info.status = 0;
         break;
     case orange:
         ghost->position.y = orange_y;
@@ -46,6 +61,11 @@ void initialize_ghost(struct ghost_type *ghost, enum ghost_color color)
         ghost->color = orange;
         ghost->frightened_status = 0;
         ghost->direction = none;
+        ghost->prison_params.position.x = orange_home_x;
+        ghost->prison_params.position.y = orange_home_y;
+        ghost->prison_params.prison_counter = 0;
+        ghost->prison_params.active = 0;
+        ghost->capture_info.status = 0;
         break;
     }
 }
@@ -256,7 +276,7 @@ void breadth_first_search(game_space field, struct ghost_type *ghost,
         for(dx = -1; dx <= 1; ++dx) {
             int dy;
             for(dy = -1; dy <= 1; ++dy) {
-                if(dx != 0 && dy != 0)
+                if((dx != 0 && dy != 0) || (dx == 0 && dy == 0))
                     continue;
                 near_point = get_near_point(consider_point, dx, dy);
                 change_point_if_outside_tunnel(&near_point);
@@ -406,14 +426,73 @@ void random_redirect(game_space field, struct ghost_type *ghost)
     ghost->direction = random_direction;
 }
 
+static int is_liberation_zone(const struct ghost_type *ghost)
+{
+    return  ghost->position.y == liberation_y &&
+        (ghost->position.x == 14 || ghost->position.x == 15) &&
+        ghost->direction == up;
+}
 
 void reverse_all_ghosts(struct ghost_type *red_ghost,
                         struct ghost_type *pink_ghost,
                         struct ghost_type *blue_ghost,
                         struct ghost_type *orange_ghost)
 {
-    red_ghost->direction ^= 1;
-    pink_ghost->direction ^= 1;
-    blue_ghost->direction ^= 1;
-    orange_ghost->direction ^= 1;
+    if(!red_ghost->prison_params.active)
+        red_ghost->direction = is_liberation_zone(red_ghost) ?
+            left : red_ghost->direction ^ 1;
+    if(!pink_ghost->prison_params.active)
+        pink_ghost->direction = is_liberation_zone(pink_ghost) ?
+            left : pink_ghost->direction ^ 1;
+    if(!blue_ghost->prison_params.active)
+        blue_ghost->direction = is_liberation_zone(blue_ghost) ?
+            left : blue_ghost->direction ^ 1;
+    if(!orange_ghost->prison_params.active)
+        orange_ghost->direction = is_liberation_zone(orange_ghost) ?
+            left : orange_ghost->direction ^ 1;
+}
+
+void set_frightened_status(int status, struct ghost_type *red_ghost,
+                           struct ghost_type *pink_ghost,
+                           struct ghost_type *blue_ghost,
+                           struct ghost_type *orange_ghost)
+{
+    red_ghost->frightened_status = status;
+    pink_ghost->frightened_status = status;
+    blue_ghost->frightened_status = status;
+    orange_ghost->frightened_status = status;
+}
+
+int is_pac_nearby(struct pacman pac, struct ghost_type ghost)
+{
+    if(ghost.capture_info.status)
+        return 0;
+    struct coordinates near_point;
+    int dx;
+    for(dx = -1; dx <= 1; ++dx) {
+        int dy;
+        for(dy = -1; dy <= 1; ++dy) {
+            if((dx != 0 && dy != 0) || (dx == 0 && dy == 0))
+                continue;
+            near_point = get_near_point(ghost.position, dx, dy);
+            if(equal_points(near_point, pac.position))
+                return 1;
+        }
+    }
+    return 0;
+}
+
+void set_capture_info(struct ghost_type *ghost, const struct pacman *pac)
+{
+    ghost->capture_info.previous_pac_position = pac->position;
+    ghost->capture_info.previous_ghost_position = ghost->position;
+    ghost->capture_info.status = 1;
+}
+
+void catch_ghost(const game_space field, struct ghost_type *ghost)
+{
+    ghost->prison_params.active = 1;
+    ghost->direction = none;
+    ghost->position.x = ghost->prison_params.position.x;
+    ghost->position.y = ghost->prison_params.position.y;
 }