Make files for ghosts

lib/Blinky.cpp

@@ -0,0 +1,27 @@
+#include "Blinky.hpp"
+
+namespace pacman {
+
+Blinky::Blinky()
+  : Ghost(Atlas::Ghost::blinky, pacman::initialBlinkyPosition(), pacman::blinkyScatterTarget()) {
+}
+
+double Blinky::speed(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return 2;
+  if (state == State::Frightened)
+    return 0.5;
+  return 0.75;
+}
+
+Position Blinky::target(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return startingPosition;
+
+  if (isInPen())
+    return pacman::penDoorPosition();
+
+  return blinkyScatterTarget();
+}
+
+}

lib/Clyde.cpp

@@ -0,0 +1,27 @@
+#include "Clyde.hpp"
+
+namespace pacman {
+
+Clyde::Clyde()
+  : Ghost(Atlas::Ghost::clyde, initialClydePosition(), clydeScatterTarget()) {
+}
+
+double Clyde::speed(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return 2;
+  if (state == State::Frightened)
+    return 0.5;
+  return 0.75;
+}
+
+Position Clyde::target(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return startingPosition;
+
+  if (isInPen())
+    return penDoorPosition();
+
+  return clydeScatterTarget();
+}
+
+}

lib/Game.cpp

@@ -73,10 +73,10 @@ void Game::step(std::chrono::milliseconds delta, InputState inputState) {
   if (!gameState.pacMan.hasDirection())
     return;
 
-  gameState.blinky.update(delta);
-  gameState.pinky.update(delta);
-  gameState.inky.update(delta);
-  gameState.clyde.update(delta);
+  gameState.blinky.update(delta, gameState);
+  gameState.pinky.update(delta, gameState);
+  gameState.inky.update(delta, gameState);
+  gameState.clyde.update(delta, gameState);
 
   checkCollision(gameState.blinky);
   checkCollision(gameState.pinky);
@@ -87,7 +87,7 @@ void Game::step(std::chrono::milliseconds delta, InputState inputState) {
   eatPellets();
 }
 
-void Game::checkCollision(Ghost ghost) {
+void Game::checkCollision(Ghost & ghost) {
   if (pacManDying() || ghost.isEyes())
     return;
 

lib/Ghost.cpp

@@ -7,8 +7,7 @@ namespace pacman {
 Ghost::Ghost(Atlas::Ghost spritesSet, Position startingPosition, Position scatterTarget)
   : spritesSet(spritesSet),
     pos(startingPosition),
-    startingPosition(startingPosition),
-    scatterTarget(scatterTarget) {
+    startingPosition(startingPosition) {
 }
 
 void Ghost::frighten() {
@@ -62,7 +61,7 @@ GridPosition Ghost::positionInGrid() const {
   return positionToGridPosition(pos);
 }
 
-void Ghost::update(std::chrono::milliseconds time_delta) {
+void Ghost::update(std::chrono::milliseconds time_delta, const GameState & gameState) {
   if (state == State::Eyes && isInPen())
     state = State::Scatter;
 
@@ -73,17 +72,17 @@ void Ghost::update(std::chrono::milliseconds time_delta) {
   }
 
   updateAnimation(time_delta);
-  updatePosition(time_delta);
+  updatePosition(time_delta, gameState);
 }
 
 bool Ghost::isInPen() const {
   return pacman::isInPen(positionInGrid());
 }
 
-void Ghost::updatePosition(std::chrono::milliseconds time_delta) {
-  updateDirection();
+void Ghost::updatePosition(std::chrono::milliseconds time_delta, const GameState & gameState) {
+  updateDirection(gameState);
 
-  double position_delta = (0.004 * time_delta.count()) * speed();
+  double position_delta = (0.004 * time_delta.count()) * speed(gameState);
 
   switch (direction) {
     case Direction::NONE:
@@ -107,14 +106,6 @@ void Ghost::updatePosition(std::chrono::milliseconds time_delta) {
   }
 }
 
-double Ghost::speed() const {
-  if (state == State::Eyes)
-    return 2;
-  if (state == State::Frightened)
-    return 0.5;
-  return 0.75;
-}
-
 /*
  *  Each time a ghost finds itself at an intersection,
  *  it picks a target position - the specific target depends on the state
@@ -131,7 +122,7 @@ double Ghost::speed() const {
  *  In the scatter state, each ghost tries to reach an unreachable position outside of the map.
  *  This makes ghosts run in circle around the island at each of the 4 map corner.
  */
-void Ghost::updateDirection() {
+void Ghost::updateDirection(const GameState & gameState) {
   const auto current_grid_position = positionInGrid();
   if (current_grid_position == last_grid_position)
     return;
@@ -149,7 +140,7 @@ void Ghost::updateDirection() {
                                            Move{ Direction::DOWN, { x, y + 1 } },
                                            Move{ Direction::RIGHT, { x + 1, y } } } };
 
-  const Position target_position = target();
+  const Position target_position = target(gameState);
 
   for (auto & move : possible_moves) {
     const bool invalid_position = (move.position.x < 0 || move.position.y < 0);
@@ -177,16 +168,6 @@ void Ghost::updateDirection() {
   last_grid_position = current_grid_position;
 }
 
-Position Ghost::target() const {
-  if (state == State::Eyes)
-    return startingPosition;
-
-  if (pacman::isInPen(positionInGrid()))
-    return pacman::penDoorPosition();
-
-  return scatterTarget;
-}
-
 void Ghost::updateAnimation(std::chrono::milliseconds time_delta) {
   timeForAnimation += time_delta.count();
   if (timeForAnimation >= 250) {
@@ -195,20 +176,4 @@ void Ghost::updateAnimation(std::chrono::milliseconds time_delta) {
   }
 }
 
-Blinky::Blinky()
-  : Ghost(Atlas::Ghost::blinky, pacman::initialBlinkyPosition(), pacman::blinkyScatterTarget()) {
-}
-
-Pinky::Pinky()
-  : Ghost(Atlas::Ghost::speedy, pacman::initialSpeedyPosition(), pacman::speedyScatterTarget()) {
-}
-
-Inky::Inky()
-  : Ghost(Atlas::Ghost::inky, pacman::initialInkyPosition(), pacman::inkyScatterTarget()) {
-}
-
-Clyde::Clyde()
-  : Ghost(Atlas::Ghost::clyde, pacman::initialClydePosition(), pacman::clydeScatterTarget()) {
-}
-
 } // namespace pacman

lib/Inky.cpp

@@ -0,0 +1,27 @@
+#include "Inky.hpp"
+
+namespace pacman {
+
+Inky::Inky()
+  : Ghost(Atlas::Ghost::inky, pacman::initialInkyPosition(), pacman::inkyScatterTarget()) {
+}
+
+double Inky::speed(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return 2;
+  if (state == State::Frightened)
+    return 0.5;
+  return 0.75;
+}
+
+Position Inky::target(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return startingPosition;
+
+  if (isInPen())
+    return pacman::penDoorPosition();
+
+  return inkyScatterTarget();
+}
+
+}

lib/Pinky.cpp

@@ -0,0 +1,27 @@
+#include "Pinky.hpp"
+
+namespace pacman {
+
+Pinky::Pinky()
+  : Ghost(Atlas::Ghost::speedy, pacman::initialSpeedyPosition(), pacman::speedyScatterTarget()) {
+}
+
+double Pinky::speed(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return 2;
+  if (state == State::Frightened)
+    return 0.5;
+  return 0.75;
+}
+
+Position Pinky::target(const GameState & gameState) const {
+  if (state == State::Eyes)
+    return startingPosition;
+
+  if (isInPen())
+    return pacman::penDoorPosition();
+
+  return speedyScatterTarget();
+}
+
+}

lib/include/Blinky.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Ghost.hpp"
+
+namespace pacman {
+
+class Blinky : public Ghost {
+public:
+  explicit Blinky();
+  [[nodiscard]] double speed(const GameState & gameState) const override;
+  [[nodiscard]] Position target(const GameState & gameState) const override;
+};
+
+} // namespace pacman

lib/include/Clyde.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Ghost.hpp"
+
+namespace pacman {
+
+class Clyde : public Ghost {
+public:
+  explicit Clyde();
+  [[nodiscard]] double speed(const GameState & gameState) const override;
+  [[nodiscard]] Position target(const GameState & gameState) const override;
+};
+
+} // namespace pacman

lib/include/Game.hpp

@@ -20,7 +20,7 @@ private:
   void step(std::chrono::milliseconds delta, InputState inputState);
   void eatPellets();
   void processEvents(InputState & inputState);
-  void checkCollision(Ghost ghost);
+  void checkCollision(Ghost & ghost);
   void killPacMan();
   bool pacManDying() const;
   void handleDeathAnimation(std::chrono::milliseconds delta);

lib/include/GameState.hpp

@@ -1,8 +1,12 @@
 #pragma once
 
+#include "Blinky.hpp"
+#include "Clyde.hpp"
 #include "Ghost.hpp"
+#include "Inky.hpp"
 #include "PacMan.hpp"
 #include "Pellets.hpp"
+#include "Pinky.hpp"
 #include "Score.hpp"
 #include "SuperPellets.hpp"
 

lib/include/Ghost.hpp

@@ -8,6 +8,8 @@
 
 namespace pacman {
 
+class GameState;
+
 class Ghost {
 public:
   enum class State {
@@ -25,7 +27,7 @@ public:
 
   [[nodiscard]] GridPosition positionInGrid() const;
 
-  void update(std::chrono::milliseconds time_delta);
+  void update(std::chrono::milliseconds time_delta, const GameState & gameState);
   void frighten();
   void die();
   [[nodiscard]] bool isFrightened() const;
@@ -33,13 +35,15 @@ public:
   void reset();
 
 private:
-  [[nodiscard]] double speed() const;
   void updateAnimation(std::chrono::milliseconds time_delta);
-  void updatePosition(std::chrono::milliseconds time_delta);
-  void updateDirection();
-  [[nodiscard]] Position target() const;
+  void updatePosition(std::chrono::milliseconds time_delta, const GameState & gameState);
+  void updateDirection(const GameState & gameState);
 
 protected:
+
+  [[nodiscard]] virtual double speed(const GameState & gameState) const = 0;
+  [[nodiscard]] virtual Position target(const GameState & gameState) const = 0;
+
   Atlas::Ghost spritesSet;
   Direction direction = Direction::NONE;
   double timeForAnimation = 0;
@@ -49,29 +53,8 @@ protected:
   int timeChase = 0;
   Position pos;
   Position startingPosition;
-  Position scatterTarget;
   GridPosition last_grid_position = { 0, 0 };
   [[nodiscard]] bool isInPen() const;
 };
 
-class Blinky : public Ghost {
-public:
-  explicit Blinky();
-};
-
-class Pinky : public Ghost {
-public:
-  explicit Pinky();
-};
-
-class Inky : public Ghost {
-public:
-  explicit Inky();
-};
-
-class Clyde : public Ghost {
-public:
-  explicit Clyde();
-};
-
 } // namespace pacman

lib/include/Inky.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Ghost.hpp"
+
+namespace pacman {
+
+class Inky : public Ghost {
+public:
+  explicit Inky();
+  [[nodiscard]] double speed(const GameState & gameState) const override;
+  [[nodiscard]] Position target(const GameState & gameState) const override;
+};
+
+} // namespace pacman

lib/include/Pinky.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Ghost.hpp"
+
+namespace pacman {
+
+class Pinky : public Ghost {
+public:
+  explicit Pinky();
+  [[nodiscard]] double speed(const GameState & gameState) const override;
+  [[nodiscard]] Position target(const GameState & gameState) const override;
+};
+
+} // namespace pacman