feat: continued work on ghosts, started work on required recursive function

src/Entities/Entity.cpp

@@ -1,12 +1,49 @@
 #include "Entity.h"
+#include "../Environment/Maze.h"
 
 namespace game {
-    Entity::Entity(PositionVector starting_position, char display_character): pos(starting_position), display_character(display_character){}
+    Entity::Entity(PositionVector starting_position, char display_character): pos(starting_position), display_character(display_character), move_left(true){}
 
     bool Entity::is_at_position(const PositionVector& position) const {
         return this->pos.eq(position);
     }
 
+    void Entity::tick(Maze& maze, const PositionVector& player_position){
+        switch (this->display_character) {
+            case 'A':
+                // No thoughts, head empty :P
+                return;
+            case 'B':
+                this->handle_bowie(maze);
+                return;
+            case 'C':
+                this->handle_connelly(maze, player_position);
+                return;
+            default:
+                return;
+        }
+    }
 
-    void move(const Maze& maze, const PositionVector& player_position);
+    void Entity::handle_bowie(Maze& maze) {
+        PositionVector target_position = {this->pos.x, this->pos.y};
+        if (this->move_left)
+            target_position.change_x(-1);
+        else
+            target_position.change_x(1);
+        if (maze.is_pos_free(target_position, false))
+            this->pos = target_position;
+        else
+            this->move_left = !this->move_left;
+    }
+
+    void Entity::handle_connelly(Maze& maze, const PositionVector& player_position) {
+        PositionVector diff = maze.get_distance_pos1_pos2(player_position, this->pos);
+        PositionVector normalized_diff = {diff.x, diff.y};
+        normalized_diff.normalize();
+        PositionVector target_position = {this->pos.x, this->pos.y};
+    }
+
+    char Entity::get_display_character() {
+        return this->display_character;
+    }
 }

src/Entities/Entity.h

@@ -1,5 +1,6 @@
 #include "../Util/PositionVector.h"
 
+
 #ifndef ENTITY_H
 #define ENTITY_H
 
@@ -10,10 +11,15 @@ namespace game
         private:
             PositionVector pos;
             char display_character;
+            bool move_left;
+
+            void handle_bowie(Maze& maze);
+            void handle_connelly(Maze& maze, const PositionVector& player_position);
         public:
             Entity(PositionVector starting_position, char display_character);
-            void move(const Maze& maze, const PositionVector& player_position);
+            void tick(Maze& maze, const PositionVector& player_position);
             bool is_at_position(const PositionVector& position) const;
+            char get_display_character();
     };
 } // game
 

src/Entities/Player.cpp

@@ -80,30 +80,25 @@ namespace game
         }
     }
 
-    GameState Player::handle_collisions(const GameState& prev_game_state, const Maze& maze) {
+    GameState Player::handle_collisions(const Game& game, const Maze& maze) {
         char field_at_pos = maze.get_field(this->get_pos());
         // Game state sanity check
-        if (prev_game_state != GameState::RUNNING)
+        if (game.get_state() != GameState::RUNNING)
-            return prev_game_state;
+            return game.get_state();
 
-        if (field_at_pos == '.')
+        if (field_at_pos == '.'){
-            return GameState::RUNNING;
+            if (game.is_enemy_at_pos(this->get_pos()))
-        switch (field_at_pos) {
-            case 'A':
-            case 'B':
-            case 'C':
                 return GameState::HIT_BY_GHOST;
-                break;
+            return GameState::RUNNING;
-            default:
-                break;
         }
-        return prev_game_state;
+        // You are not supposed to be here!
+        return game.get_state();
     }
 
 
-    void Player::tick(const GameState& prev_game_state, Maze& maze) {
+    void Player::tick(const Game& game, Maze& maze) {
         this->handle_keys(maze);
-        this->handle_collisions(prev_game_state, maze);
+        this->handle_collisions(game, maze);
     }
 
     bool Player::has_key_available() const

src/Entities/Player.h

@@ -9,6 +9,7 @@ using game::GameState;
 namespace game
 {
     class Maze;
+    class Game;
 
     /// Ein Spieler.
     /// Besitzt einen veränderbaren Positionsvektor
@@ -32,7 +33,7 @@ namespace game
 
         /// Kontrolliere, ob der Spieler gerade in einem Geist steht
         /// @param maze Das Maze
-        GameState handle_collisions(const GameState& prev_game_state, const Maze& maze);
+        GameState handle_collisions(const Game& game, const Maze& maze);
 
     public:
         /// Ein Spieler.
@@ -57,7 +58,7 @@ namespace game
         Maze handle_user_input(Maze& maze, const char& input);
 
         /// 
-        void tick(const GameState& prev_game_state, Maze& maze);
+        void tick(const Game& game, Maze& maze);
 
         /// Check, if a player has at least one key
         /// @return If the player as an available key

src/Environment/Game.cpp

@@ -12,14 +12,14 @@ using game_exceptions::MovementNotPossible;
 
 namespace game
 {
-    Game::Game(Maze& maze): maze(maze), player(0, 0), infomode_enabled(false), state(GameState::RUNNING)
+    Game::Game(Maze& maze): maze(maze), player(0, 0), infomode_enabled(false), state(GameState::RUNNING), enemies({})
     {
         PositionVector player_start_position = this->maze.get_player_start_position();
 
         this->player = Player(player_start_position);
     }
 
-    GameState Game::get_state() {
+    GameState Game::get_state() const {
         return this->state;
     }
 
@@ -46,6 +46,13 @@ namespace game
         }
     }
 
+    bool Game::is_enemy_at_pos(const PositionVector& position) const{
+        for (Entity e : this->enemies)
+            if (e.is_at_position(position))
+                return true;
+        return false;
+    }
+
     bool Game::should_end_game() {
         return this->state != GameState::RUNNING;
     }
@@ -79,7 +86,12 @@ namespace game
                 cout << err.what() << "\n";
             }
 
-            this->player.tick(this->state, this->maze);
+            this->player.tick(*this, this->maze);
+
+            for (Entity e : this->enemies)
+                e.tick(this->maze, this->player.get_pos());
+
+            this->player.tick(*this, this->maze);
 
             if (this->should_end_game())
                 return;

src/Environment/Game.h

@@ -1,6 +1,7 @@
 #include "Maze.h"
 #include "../Entities/Player.h"
 #include "../Util/GameState.h"
+#include "../Entities/Entity.h"
 
 #ifndef GAME_H
 #define GAME_H
@@ -39,7 +40,9 @@ namespace game
 
         /// Kriege den aktuellen Status des Spiels
         /// @returns Den aktuellen Status
-        GameState get_state();
+        GameState get_state() const;
+
+        bool is_enemy_at_pos(const PositionVector& position) const ;
     };
 } // game
 

src/Environment/Maze.cpp

@@ -45,9 +45,14 @@ namespace game
                 if (y == player.get_pos().y && x == player.get_pos().x)
                     cout << "S";
                 else {
-                    for(Entity e : entities) {
+                    bool an_enemy_is_at_this_position = false;
-                    }
+                    for (Entity e : entities)
-                    cout << field[y][x];
+                        if (e.is_at_position({x, y})) {
+                            an_enemy_is_at_this_position = true;
+                            cout << e.get_display_character();
+                        }
+                    if (!an_enemy_is_at_this_position)
+                        cout << field[y][x];
                 }
                 cout << " ";
             }
@@ -69,4 +74,20 @@ namespace game
     {
         return this->player_start_position;
     }
+
+    PositionVector Maze::get_distance_pos1_pos2(const PositionVector& pos1, const PositionVector& pos2) {
+        int x_diff = pos1.x - pos2.x;
+        int y_diff = pos1.y - pos2.y;
+        return {x_diff, y_diff};
+    }
+
+    int Maze::calculate_steps(const PositionVector& target_position, PositionVector position, int steps) {
+        if (this->is_pos_free(position, false))
+            return 999;
+        if (target_position.eq(position))
+            return 0;
+        if (steps <= 0)
+            return 999;
+        vector<int> i;
+    }
 } // game

src/Environment/Maze.h

@@ -57,6 +57,12 @@ namespace game
     /// Kriege die Startposition des Spielers
     /// @return Die Startposition des Spielers
     PositionVector get_player_start_position() const;
+
+    /// Berrechne den Abstand zwischen zwei Vektoren
+    /// @return Der Abstand als Differenzvektor
+    PositionVector get_distance_pos1_pos2(const PositionVector& pos1, const PositionVector& pos2);
+
+    int calculate_steps(const PositionVector& target_position, PositionVector position, int steps);
   };
 } // game
 

src/Util/MazeParser.cpp

@@ -1,8 +1,10 @@
 #include "MazeParser.h"
 #include "../Environment/Maze.h"
 #include "../Exceptions/MalformedMaze.h"
+#include "../Entities/Entity.h"
 
 using game_exceptions::MalformedMaze;
+using game::Entity;
 
 namespace game
 {
@@ -33,12 +35,20 @@ namespace game
         return false;
     }
 
+    bool MazeParser::is_valid_enemy(const char& target) {
+        for (const char c : valid_enemies) 
+            if (c == target)
+                return true;
+        return false;
+    }
+
     Maze MazeParser::request_maze_from_user()
     {
         vector<int> maze_size = request_numbers_from_user(2);
 
         char input;
         vector<vector<char>> field;
+        vector<Entity> enemies;
 
         for (int y = 0; y < maze_size[0]; ++y)
         {
@@ -49,14 +59,18 @@ namespace game
                 if (!cin)
                     throw MalformedMaze("Cin failed while reading chars!");
 
-                // I don't think that this is needed. I doubt that the test check for this one ~Eric
+                // I don't think that this is needed. I doubt that they test the check for this one ~Eric
-                //if (input == 'q')
+                // if (input == 'q')
                 //    throw ExitGame("Schoenen Tag noch!");
 
                 if (!validate_maze_element(input))
                     throw MalformedMaze("The given input is not a valid element of a maze!");
-
+                if (!is_valid_enemy(input))
-                row.push_back(input);
+                    row.push_back(input);
+                else {
+                    enemies.push_back(Entity({x, y}, input));
+                    row.push_back('.');
+                }
             }
 
             field.push_back(row);
@@ -64,6 +78,6 @@ namespace game
 
         vector<int> player_start_pos = request_numbers_from_user(2);
 
-        return Maze(field, player_start_pos);
+        return Maze(field, player_start_pos, enemies);
     } // Beispieleingabe: `4 3 #.# #.K #T# #Z# 0 1`
 } // game

src/Util/MazeParser.h

@@ -19,6 +19,7 @@ namespace game
     /// Erlaubte Zeichen in einem Labyrinth
     /// Ist eine Konstante, darf also in global scope
     static const vector<char> valid_maze_elements = {'Z', '.', '#', 'A', 'K', 'T', 'B', 'C'};
+    static const vector<char> valid_enemies = {'A', 'B', 'C'};
     static constexpr int MAX_MAZE_SIZE = 20;
 
     class Maze;
@@ -35,6 +36,8 @@ namespace game
         /// @return Ob das gegebene Zeichen in einem Labyrinth vorkommen darf
         static bool validate_maze_element(const char& target);
 
+        static bool is_valid_enemy(const char& target);
+
     public:
         /// Lese ein Labyrinth aus der Konsole
         /// @return Das Labyrinth

src/Util/PositionVector.cpp

@@ -14,6 +14,21 @@ namespace game
     this->y = y;
   }
 
+  void PositionVector::change_x(const int& amount) {
+      this->x += amount;
+  }
+
+  void PositionVector::change_y(const int& amount) {
+      this->y += amount;
+  }
+
+  void PositionVector::normalize() {
+      if (this->x < 0)
+          this->x *= -1;
+      if (this->y < 0)
+          this->y *= -1;
+  }
+
   bool PositionVector::eq(const PositionVector& position) const {
       return this->x == position.x && this->y == position.y;
   }

src/Util/PositionVector.h

@@ -23,6 +23,11 @@ namespace game
         /// @param y Die neue 'Y'-Koordinate
         void update(const int& x, const int& y);
 
+        void change_x(const int& amount);
+        void change_y(const int& amount);
+
+        void normalize();
+
         bool eq(const PositionVector& position)const ;
     };
 } // game