chore: bump version to "alpha-0.2.0"

include/game/BaseGame.h

@@ -12,14 +12,28 @@ enum class GameState : std::uint8_t {
     Game,
     EndGame,
     Disconnected,
+    Closed
 };
 
 typedef std::map<std::uint8_t, Player> PlayerList;
 
-class Game {
+class GameListener {
+public:
+    virtual void OnPlayerJoin(PlayerID player) {}
+    virtual void OnPlayerLeave(PlayerID player) {}
+
+    virtual void OnGameStateUpdate(GameState newState) {}
+    virtual void OnGameBegin() {}
+    virtual void OnGameEnd() {}
+    virtual void OnGameClose() {}
+};
+
+typedef utils::ObjectNotifier<GameListener> GameNotifier;
+
+class Game : public GameNotifier {
 protected:
     World* m_World;
-    std::array<Team, 2> m_Teams = { Team{TeamColor::Red}, Team{TeamColor::Blue} };
+    TeamList m_Teams = { Team{TeamColor::Red}, Team{TeamColor::Blue} };
     GameState m_GameState = GameState::Lobby;
     PlayerList m_Players;
 public:
@@ -46,8 +60,10 @@ public:
     const PlayerList& getPlayers() const { return m_Players; }
     PlayerList& getPlayers() { return m_Players; }
 
-    const Player& getPlayerById(PlayerID id) const { return m_Players.find(id)->second; }
-    Player& getPlayerById(PlayerID id) { return m_Players.find(id)->second; }
+    const Player* getPlayerById(PlayerID id) const;
+    Player* getPlayerById(PlayerID id);
+
+    const TeamList& getTeams() const { return m_Teams; }
 
 };
 

include/game/Mobs.h

@@ -4,6 +4,8 @@
 #include "Types.h"
 #include "Team.h"
 
+#include "misc/ObjectNotifier.h"
+
 #include <vector>
 #include <memory>
 
@@ -12,6 +14,8 @@
 namespace td {
 namespace game {
 
+struct WalkableTile;
+
 enum class EffectType : std::uint8_t {
     Slowness = 0,
     Stun,
@@ -69,14 +73,14 @@ public:
 struct EffectDuration {
     EffectType type;
     float duration; // in seconds
-    const Tower* tower; // the tower that gived the effect
+    Tower* tower; // the tower that gived the effect
 };
 
 const MobStats* getMobStats(MobType type, std::uint8_t level);
 const TowerImmunities& getMobTowerImmunities(MobType type, std::uint8_t level);
 const EffectImmunities& getMobEffectImmunities(MobType type, std::uint8_t level);
 
-class Mob : public utils::shape::Rectangle{
+class Mob : public utils::shape::Rectangle {
 protected:
     float m_Health;
 private:
@@ -91,47 +95,63 @@ private:
     utils::Timer m_EffectPoisonTimer;
     utils::Timer m_EffectHealTimer;
 
+    TeamCastle* m_CastleTarget;
+    utils::CooldownTimer m_AttackTimer;
+
 public:
     Mob(MobID id, MobLevel level, PlayerID sender) : m_Sender(sender), m_Level(level),
-        m_EffectFireTimer(1000), m_EffectPoisonTimer(1000), m_EffectHealTimer(1000) {
+        m_EffectFireTimer(1000), m_EffectPoisonTimer(1000),
+        m_EffectHealTimer(1000), m_CastleTarget(nullptr), m_AttackTimer(1000) {
 
     }
 
     virtual MobType getType() const = 0;
 
-    virtual void tick(std::uint64_t delta);
+    virtual void tick(std::uint64_t delta, World* world);
 
     virtual bool OnDeath(World* world) { return true; }
 
+    MobID getMobID() const { return m_ID; }
     const TowerImmunities& getTowerImmunities() const { return getMobTowerImmunities(getType(), m_Level); }
     const EffectImmunities& getEffectImmunities() const { return getMobEffectImmunities(getType(), m_Level); }
     PlayerID getSender() const { return m_Sender; }
     MobLevel getLevel() const { return m_Level; }
     const MobStats* getStats() const { return getMobStats(getType(), m_Level); }
+    void setHealth(float newHealth) { m_Health = newHealth; }
     float getHealth() const { return m_Health; }
     bool isDead() const { return m_Health <= 0; }
     bool isAlive() const { return m_Health > 0; }
     const Tower* getLastDamageTower() { return m_LastDamage; }
+    bool hasReachedEnemyCastle() { return m_CastleTarget != nullptr; }
 
     void damage(float dmg, const Tower* damager) { m_Health = std::max(0.0f, m_Health - dmg); m_LastDamage = damager; }
     void heal(float heal) { m_Health = std::min(static_cast<float>(getStats()->getMaxLife()), m_Health + heal); }
+    void setMobReachedCastle(TeamCastle* castle) { m_CastleTarget = castle; } // used when mob is in front of the castle
 
     bool isImmuneTo(TowerType type);
 
     bool isImmuneTo(EffectType type);
-    void addEffect(EffectType type, float durationSec, const Tower* tower);
+    void addEffect(EffectType type, float durationSec, Tower* tower);
     bool hasEffect(EffectType type);
 
+    float getTileX() { return getCenterX() - static_cast<float>(static_cast<std::int32_t>(getCenterX())); } // returns a float between 0 and 1 excluded
+    float getTileY() { return getCenterY() - static_cast<float>(static_cast<std::int32_t>(getCenterY())); } // returns a float between 0 and 1 excluded
 
     Direction getDirection() const { return m_Direction; }
     void setDirection(Direction dir) { m_Direction = dir; }
 protected:
-    void initMob() { 
-        m_Health = static_cast<float>(getStats()->getMaxLife()); 
+    void initMob() {
+        m_Health = static_cast<float>(getStats()->getMaxLife());
         setSize(getStats()->getSize().x, getStats()->getSize().y);
     }
 private:
-    void updateEffects(std::uint64_t delta);
+    void updateEffects(std::uint64_t delta, World* world);
+    void attackCastle(std::uint64_t delta, World* world);
+    void move(std::uint64_t delta, World* world);
+    void walk(std::uint64_t delta, World* world);
+    void moveBack(const TeamCastle& castle, World* world);
+    void changeDirection(const WalkableTile& tile, World* world);
+    bool isTouchingCastle(const TeamCastle& castle) const;
     EffectDuration& getEffect(EffectType type);
 };
 
@@ -212,6 +232,18 @@ MobPtr createMob(MobID id, MobType type, std::uint8_t level, PlayerID sender);
 std::string getMobName(MobType type);
 }
 
+class MobListener {
+public:
+    virtual void OnMobSpawn(Mob* mob) {}
+    virtual void OnMobDie(Mob* mob) {}
+
+    virtual void OnMobDamage(Mob* target, float damage, Tower* damager) {}
+
+    virtual void OnMobTouchCastle(Mob* damager, TeamCastle* enemyCastle) {}
+    virtual void OnMobCastleDamage(Mob* damager, TeamCastle* enemyCastle, float damage) {}
+};
+
+typedef utils::ObjectNotifier<MobListener> MobNotifier;
 
 } // namespace game
 } // namespace td

include/game/Team.h

@@ -23,7 +23,7 @@ class Spawn : public utils::shape::Rectangle {
 private:
     Direction m_Direction;
 public:
-    Spawn(){
+    Spawn() {
         setWidth(5);
         setHeight(5);
     }
@@ -33,19 +33,34 @@ public:
     void setDirection(Direction direction) { m_Direction = direction; }
 };
 
-struct TeamCastle : public utils::shape::Rectangle{
+class Team;
+
+class TeamCastle : public utils::shape::Rectangle {
 private:
+    const Team* m_Team;
     float m_Life;
 public:
-    TeamCastle() : m_Life(1000) {
+    static constexpr int CastleMaxLife = 1000;
+
+    TeamCastle(const Team* team) : m_Team(team), m_Life(CastleMaxLife) {
         setWidth(5);
         setHeight(5);
     }
 
+    TeamCastle() : TeamCastle(nullptr) {}
+
     float getLife() const { return m_Life; }
 
+    const Team* getTeam() const { return m_Team; }
+    void setTeam(const Team* team) { m_Team = team; }
+
     void setLife(float life) { m_Life = life; }
     void damage(float damage) { m_Life = std::max(0.0f, m_Life - damage); }
+
+    void setShape(utils::shape::Rectangle rect) {
+        setCenter(rect.getCenter());
+        setSize(rect.getSize());
+    }
 };
 
 class Team {
@@ -71,5 +86,7 @@ public:
     std::uint8_t getPlayerCount() const;
 };
 
+typedef std::array<Team, 2> TeamList;
+
 } // namespace game
 } // namespace td

include/game/Towers.h

@@ -163,6 +163,9 @@ class ArcherTower : public LittleTower {
 public:
     ArcherTower(TowerID id, std::uint16_t x, std::uint16_t y, PlayerID builder) : LittleTower(id, getType(), x, y, builder) {}
 
+    constexpr static float ExplosionRadius = 1.5f;
+    constexpr static float FireDurationSec = 10.0f;
+
     virtual TowerType getType() const { return TowerType::Archer; }
     virtual void tick(std::uint64_t delta, World* world);
 };

include/game/World.h

@@ -56,6 +56,13 @@ struct Color {
     std::uint8_t r, g, b;
 };
 
+static constexpr Color BLACK{ 0, 0, 0 };
+static constexpr Color WHITE{ 255, 255, 255 };
+
+static constexpr Color RED{ 255, 0, 0 };
+static constexpr Color GREEN{ 0, 255, 0 };
+static constexpr Color BLUE{ 0, 0, 255 };
+
 struct Tile {
     virtual TileType getType() const = 0;
 };
@@ -114,11 +121,27 @@ typedef std::array<Color, 2> SpawnColorPalette;
 
 typedef std::vector<TowerPtr> TowerList;
 
-class World {
+class WorldListener {
+public:
+    WorldListener() {}
+
+    virtual void OnTowerAdd(TowerPtr tower) {}
+    virtual void OnTowerRemove(TowerPtr tower) {}
+
+    virtual void OnArcherTowerShot(MobPtr target, ArcherTower* shooter) {}
+
+    virtual void OnArrowShot(MobPtr target, bool fire, Tower* shooter) {}
+    virtual void OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter) {}
+};
+
+typedef utils::ObjectNotifier<WorldListener> WorldNotifier;
+
+class World : public WorldListener, public MobListener {
 protected:
     TowerTileColorPalette m_TowerPlacePalette;
     Color m_WalkablePalette;
     std::vector<Color> m_DecorationPalette;
+    Color m_Background;
 
     std::unordered_map<ChunkCoord, ChunkPtr> m_Chunks;
 
@@ -131,11 +154,12 @@ protected:
     TowerList m_Towers;
 
     Game* m_Game;
+
+    WorldNotifier m_WorldNotifier;
+    MobNotifier m_MobNotifier;
 public:
     World(Game* game);
 
-    static constexpr std::uint8_t CastleWidth = 5, CastleHeight = 5;
-
     bool loadMap(const protocol::WorldBeginDataPacket* worldHeader);
     bool loadMap(const protocol::WorldDataPacket* worldData);
 
@@ -147,12 +171,14 @@ public:
     void spawnMobAt(MobID id, MobType type, std::uint8_t level, PlayerID sender, float x, float y, Direction dir);
 
     TowerPtr placeTowerAt(TowerID id, TowerType type, std::int32_t x, std::int32_t y, PlayerID builder);
+    TowerPtr removeTower(TowerID id);
 
     TilePtr getTile(std::int32_t x, std::int32_t y) const;
 
     const TowerTileColorPalette& getTowerTileColorPalette() const { return m_TowerPlacePalette; }
     const Color& getWalkableTileColor() const { return m_WalkablePalette; }
     const std::vector<Color>& getDecorationPalette() const { return m_DecorationPalette; }
+    const Color& getBackgroundColor() const { return m_Background; }
 
     const TilePalette& getTilePalette() const { return m_TilePalette; }
 
@@ -186,16 +212,29 @@ public:
     Team& getTeam(TeamColor team);
     const Team& getTeam(TeamColor team) const;
 
+    const TeamList& getTeams() const;
+
     const TowerList& getTowers() const { return m_Towers; };
     TowerPtr getTowerById(TowerID tower);
 
-    // Archer Tower
-    virtual void OnArrowShot(MobPtr target, Tower* shooter);
+    const Player* getPlayerById(PlayerID id) const;
+
+    WorldNotifier& getWorldNotifier() { return m_WorldNotifier; }
+    MobNotifier& getMobNotifier() { return m_MobNotifier; }
+
+    // WorldListener
+
+    virtual void OnArcherTowerShot(MobPtr target, ArcherTower* shooter);
+
+    virtual void OnArrowShot(MobPtr target, bool fire, Tower* shooter);
+    virtual void OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter);
+
+    // MobListener
+
+    virtual void OnMobDamage(Mob* target, float damage, Tower* source);
+    virtual void OnMobCastleDamage(Mob* damager, TeamCastle* enemyCastle, float damage);
+
 private:
-    void moveMobs(std::uint64_t delta);
-    void moveMob(MobPtr mob, std::uint64_t delta);
-    void moveBackMob(MobPtr mob, const TeamCastle& castle);
-    bool isMobTouchingCastle(MobPtr mob, const TeamCastle& castle) const;
     void tickMobs(std::uint64_t delta);
     void cleanDeadMobs();
 };

include/game/client/Client.h

@@ -19,16 +19,16 @@ class Client {
 private:
     render::Renderer* m_Renderer;
     ClientConnexion m_Connexion;
-    ClientGame m_Game;
+    std::unique_ptr<ClientGame> m_Game;
     bool m_Connected;
 public:
-    Client(render::Renderer* renderer) : m_Renderer(renderer), m_Game(this), m_Connected(false) {}
+    Client(render::Renderer* renderer) : m_Renderer(renderer), m_Game(std::make_unique<ClientGame>(this)), m_Connected(false) {}
 
-    const ClientGame& getGame() const { return m_Game; }
+    const ClientGame& getGame() const { return *m_Game; }
     const ClientConnexion& getConnexion() const { return m_Connexion; }
     render::Renderer* getRenderer() const { return m_Renderer; }
 
-    ClientGame& getGame() { return m_Game; }
+    ClientGame& getGame() { return *m_Game; }
     ClientConnexion& getConnexion() { return m_Connexion; }
 
     void tick(std::uint64_t delta);
@@ -44,6 +44,9 @@ public:
     void sendMobs(const std::vector<protocol::MobSend>& mobSends);
     void placeTower(game::TowerType type, const glm::vec2& position);
     void upgradeTower(game::TowerID tower, game::TowerLevel level);
+    void removeTower(game::TowerID tower);
+private:
+    void reset();
 };
 
 } // namespace client

include/game/client/ClientGame.h

@@ -37,6 +37,7 @@ public:
     Client* getClient() const { return m_Client; }
 
     render::Renderer* getRenderer() const { return m_Renderer; }
+    WorldClient& getWorldClient() { return m_WorldClient; }
 
     virtual void HandlePacket(const protocol::ConnexionInfoPacket* packet);
     virtual void HandlePacket(const protocol::PlayerJoinPacket* packet);
@@ -48,7 +49,7 @@ public:
     virtual void HandlePacket(const protocol::UpdateMoneyPacket* packet);
     virtual void HandlePacket(const protocol::DisconnectPacket* packet);
     virtual void HandlePacket(const protocol::WorldDataPacket* packet);
-    virtual void HandlePacket(const protocol::WorldAddTowerPacket* packet);
+
 };
 
 } // namespace client

include/game/client/WorldClient.h

@@ -14,12 +14,15 @@ private:
 public:
     WorldClient(ClientGame* game);
 
-    virtual void HandlePacket(const protocol::WorldBeginDataPacket* packet) override;
-    virtual void HandlePacket(const protocol::WorldDataPacket* packet) override;
-    virtual void HandlePacket(const protocol::SpawnMobPacket* packet) override;
-    virtual void HandlePacket(const protocol::UpgradeTowerPacket* packet) override;
+    virtual void HandlePacket(const protocol::WorldBeginDataPacket* packet);
+    virtual void HandlePacket(const protocol::WorldDataPacket* packet);
+    virtual void HandlePacket(const protocol::SpawnMobPacket* packet);
+    virtual void HandlePacket(const protocol::UpgradeTowerPacket* packet);
+    virtual void HandlePacket(const protocol::WorldAddTowerPacket* packet);
+    virtual void HandlePacket(const protocol::RemoveTowerPacket* packet);
+    virtual void HandlePacket(const protocol::UpdateMobStatesPacket* packet);
+    virtual void HandlePacket(const protocol::UpdateCastleLifePacket* packet);
 
-    virtual void OnArrowShot(game::MobPtr target, game::Tower* shooter) override;
 };
 
 } // namespace client   

include/game/server/Server.h

@@ -61,12 +61,11 @@ private:
     bool m_ServerRunning;
 public:
     Server(const std::string& worldFilePath);
-    virtual ~Server() {}
+    virtual ~Server();
 
     bool start(std::uint16_t port);
-    void stop();
-
-    void lauchGame();
+    void stop(); // force the server to stop
+    void close(); // at the end of a game
 
     void removeConnexion(std::uint8_t connexionID);
 
@@ -74,6 +73,8 @@ public:
 
     float getTPS() const { return m_TickCounter.getTPS(); }
 
+    bool isRunning() { return m_ServerRunning; }
+
     const ServerGame& getGame() const { return m_Game; }
     ServerGame& getGame() { return m_Game; }
 
@@ -88,6 +89,7 @@ private:
     void accept();
     void updateSockets();
 
+    void clean();
     void startThread();
     void stopThread();
     void tick(std::uint64_t delta);

include/game/server/ServerConnexion.h

@@ -40,6 +40,7 @@ public:
     virtual void HandlePacket(const protocol::PlaceTowerPacket* packet);
     virtual void HandlePacket(const protocol::SendMobsPacket* packet);
     virtual void HandlePacket(const protocol::UpgradeTowerPacket* packet);
+    virtual void HandlePacket(const protocol::RemoveTowerPacket* packet);
 
     std::uint8_t getID() const { return m_ID; }
     const game::Player* getPlayer() const { return m_Player; }

include/game/server/ServerGame.h

@@ -9,11 +9,13 @@ namespace server {
 
 class Server;
 
-class ServerGame : public game::Game {
+class ServerGame : public game::Game, public game::GameListener {
 private:
     Server* m_Server;
     ServerWorld m_ServerWorld;
-    utils::AutoTimer m_GoldMineTimer{ 1000, std::bind(&ServerGame::updateGoldMines, this) };
+    utils::AutoTimer m_GoldMineTimer;
+    utils::AutoTimer m_MobStatesTimer;
+    utils::CooldownTimer m_EndGameCooldown;
 public:
     ServerGame(Server* server);
     ~ServerGame() {}
@@ -22,8 +24,16 @@ public:
 
     virtual void tick(std::uint64_t delta);
     void startGame();
+
+    // GameListener
+
+    virtual void OnGameStateUpdate(game::GameState newState);
+    virtual void OnGameBegin();
+    virtual void OnGameEnd();
+    virtual void OnGameClose();
 private:
     void balanceTeams();
+    void updateMobStates();
     void updateGoldMines();
     void updatePlayerStats();
 };

include/game/server/ServerWorld.h

@@ -14,12 +14,17 @@ private:
     game::TowerID m_CurrentTowerID;
     Server* m_Server;
 public:
+    static constexpr float MobSpawnBorder = 0.01f;
+
     ServerWorld(Server* server, ServerGame* game);
 
     void spawnMobs(game::MobType type, std::uint8_t level, game::PlayerID sender, std::uint8_t count);
     game::TowerPtr placeTowerAt(game::TowerType type, std::int32_t x, std::int32_t y, game::PlayerID builder);
 
-    virtual void OnArrowShot(game::MobPtr target, game::Tower* shooter) override;
+    virtual void OnMobDie(game::Mob* mob);
+
+    virtual void OnMobCastleDamage(game::Mob* damager, game::TeamCastle* enemyCastle, float damage);
+
 };
 
 } // namespace server  

include/misc/ObjectNotifier.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <algorithm>
+#include <functional>
+#include <vector>
+
+namespace td {
+namespace utils {
+
+template <typename Listener>
+class ObjectNotifier {
+protected:
+    std::vector<Listener*> m_Listeners;
+
+public:
+    void bindListener(Listener* listener) {
+        m_Listeners.push_back(listener);
+    }
+
+    void unbindListener(Listener* listener) {
+        auto iter = std::find(m_Listeners.begin(), m_Listeners.end(), listener);
+
+        if(iter == m_Listeners.end()) return;
+
+        m_Listeners.erase(iter);
+    }
+
+    template <typename Func, typename... Args>
+    void notifyListeners(Func function, Args... args) {
+        for (Listener* listener : m_Listeners)
+            std::bind(function, listener, args...)();
+    }
+};
+
+} // namespace utils
+} // namespace td

include/misc/Shapes.h

@@ -47,12 +47,19 @@ public:
     void setCenterY(float y) { m_Center.setY(y); }
 
     void setSize(float width, float height) { setWidth(width); setHeight(height); }
+    void setSize(Point size) { setSize(size.getX(), size.getY()); }
+    Point getSize() { return { m_Width, m_Height }; }
+
     void setWidth(float width) { m_Width = width; }
     void setHeight(float height) { m_Height = height; }
 
     bool collidesWith(const Point& point) const;
     bool collidesWith(const Rectangle& rect) const;
     bool collidesWith(const Circle& circle) const;
+
+    // distance from the closest side of the rectangle
+    float distance(const Circle& circle) const;
+    float distanceSquared(const Circle& circle) const;
 };
 
 class Circle {
@@ -78,6 +85,10 @@ public:
     bool collidesWith(const Point& point) const;
     bool collidesWith(const Rectangle& rect) const;
     bool collidesWith(const Circle& circle) const;
+
+    // distance from the closest side of the rectangle
+    float distance(const Rectangle& rect) const;
+    float distanceSquared(const Rectangle& rect) const;
 };
 
 } // namespace shape

include/misc/Time.h

@@ -39,7 +39,7 @@ public:
 // utililty class to call function at regular period of time
 class Timer {
 private:
-    std::uint64_t m_Interval;
+    std::uint64_t m_Interval; // in millis
     std::uint64_t m_InternalTime = 0;
 public:
     Timer() : m_Interval(0) {}
@@ -53,10 +53,10 @@ public:
     std::uint64_t getInterval() const { return m_Interval; }
 };
 
-// utililty class to call function at regular period of time with a cooldown (used for towers)
+// utililty class to call function at regular period of time with a cooldown (used for towers and mobs )
 class CooldownTimer {
 private:
-    std::uint64_t m_Cooldown;
+    std::uint64_t m_Cooldown; // in millis
     std::uint64_t m_CooldownTime;
 public:
     CooldownTimer() : m_Cooldown(0), m_CooldownTime(0) {}

include/protocol/PacketHandler.h

@@ -35,9 +35,11 @@ public:
     virtual void HandlePacket(const SpawnMobPacket* packet) {}
     virtual void HandlePacket(const PlaceTowerPacket* packet) {}
     virtual void HandlePacket(const WorldAddTowerPacket* packet) {}
-    virtual void HandlePacket(const WorldRemoveTowerPacket* packet) {}
+    virtual void HandlePacket(const RemoveTowerPacket* packet) {}
     virtual void HandlePacket(const SendMobsPacket* packet) {}
     virtual void HandlePacket(const UpgradeTowerPacket* packet) {}
+    virtual void HandlePacket(const UpdateMobStatesPacket* packet) {}
+    virtual void HandlePacket(const UpdateCastleLifePacket* packet) {}
 };
 
 } // namespace protocol

include/protocol/Protocol.h

@@ -33,18 +33,21 @@ enum class PacketType : std::uint8_t {
     UpdatePlayerTeam,
     ServerTps,
     WorldAddTower,
-    WorldRemoveTower,
+    UpdateMobStates,
+    UpdateCastleLife,
 
     // client <--> server
     KeepAlive,
     Disconnect,
     UpgradeTower,
+    RemoveTower,
 };
 
 struct WorldHeader {
     game::TowerTileColorPalette m_TowerPlacePalette;
     game::Color m_WalkablePalette;
     std::vector<game::Color> m_DecorationPalette;
+    game::Color m_Background;
 
     game::SpawnColorPalette m_SpawnColorPalette;
 
@@ -128,6 +131,7 @@ public:
     const game::TowerTileColorPalette& getTowerTilePalette() const { return m_Header.m_TowerPlacePalette; }
     const game::Color& getWalkableTileColor() const { return m_Header.m_WalkablePalette; }
     const std::vector<game::Color>& getDecorationPalette() const { return m_Header.m_DecorationPalette; }
+    const game::Color& getBackgroundColor() const { return m_Header.m_Background; }
 
     const game::Spawn& getRedSpawn() const { return m_Header.m_RedSpawn; }
     const game::Spawn& getBlueSpawn() const { return m_Header.m_BlueSpawn; }
@@ -477,13 +481,13 @@ public:
     virtual PacketType getType() const { return PacketType::WorldAddTower; }
 };
 
-class WorldRemoveTowerPacket : public Packet {
+class RemoveTowerPacket : public Packet {
 private:
     game::TowerID m_TowerID;
 public:
-    WorldRemoveTowerPacket() {}
-    WorldRemoveTowerPacket(game::TowerID id) : m_TowerID(id) {}
-    virtual ~WorldRemoveTowerPacket() {}
+    RemoveTowerPacket() {}
+    RemoveTowerPacket(game::TowerID id) : m_TowerID(id) {}
+    virtual ~RemoveTowerPacket() {}
 
     virtual DataBuffer Serialize() const;
     virtual void Deserialize(DataBuffer& data);
@@ -491,7 +495,7 @@ public:
 
     game::TowerID getTowerID() const { return m_TowerID; }
 
-    virtual PacketType getType() const { return PacketType::WorldRemoveTower; }
+    virtual PacketType getType() const { return PacketType::RemoveTower; }
 };
 
 class UpgradeTowerPacket : public Packet {
@@ -513,5 +517,60 @@ public:
     virtual PacketType getType() const { return PacketType::UpgradeTower; }
 };
 
+class MobState {
+    using Point = utils::shape::Point;
+private:
+    game::MobID m_MobID;
+    Point m_MobPosition;
+    float m_MobLife;
+    game::Direction m_MobDirection;
+public:
+    MobState() {}
+    MobState(game::MobID id, Point position, float life, game::Direction direction) :
+        m_MobID(id), m_MobPosition(position), m_MobLife(life), m_MobDirection(direction) {}
+
+    game::MobID getMobId() const { return m_MobID; }
+    Point getMobPosition() const { return m_MobPosition; }
+    float getMobLife() const { return m_MobLife; }
+    game::Direction getMobDirection() const { return m_MobDirection; }
+};
+
+class UpdateMobStatesPacket : public Packet {
+private:
+    std::vector<MobState> m_MobStates;
+public:
+    UpdateMobStatesPacket() {}
+    virtual ~UpdateMobStatesPacket() {}
+
+    virtual DataBuffer Serialize() const;
+    virtual void Deserialize(DataBuffer& data);
+    virtual void Dispatch(PacketHandler* handler) const;
+
+    void addMobState(MobState mobState) { m_MobStates.push_back(mobState); }
+
+    const std::vector<MobState>& getMobStates() const { return m_MobStates; }
+
+    virtual PacketType getType() const { return PacketType::UpdateMobStates; }
+};
+
+class UpdateCastleLifePacket : public Packet {
+private:
+    std::uint16_t m_CastleLife;
+    game::TeamColor m_Team;
+public:
+    UpdateCastleLifePacket() {}
+    UpdateCastleLifePacket(std::uint16_t life, game::TeamColor team) : m_CastleLife(life), m_Team(team) {}
+    virtual ~UpdateCastleLifePacket() {}
+
+    virtual DataBuffer Serialize() const;
+    virtual void Deserialize(DataBuffer& data);
+    virtual void Dispatch(PacketHandler* handler) const;
+
+    std::uint16_t getCastleLife() const { return m_CastleLife; }
+    game::TeamColor getTeamColor() const { return m_Team; }
+
+    virtual PacketType getType() const { return PacketType::UpdateCastleLife; }
+};
+
 }
 }

include/render/Renderer.h

@@ -29,6 +29,8 @@ private:
     std::unique_ptr<WorldShader> m_WorldShader;
     std::unique_ptr<EntityShader> m_EntityShader;
 
+    glm::vec3 m_BackgroundColor;
+
     bool m_IsometricView = true;
     float m_IsometricShade = m_IsometricView;
     glm::vec2 m_CamPos{};
@@ -49,6 +51,8 @@ public:
     void setCamPos(const glm::vec2& newPos);
     void setIsometricView(bool isometric); // false = 2D       true = Isometric
 
+    void setBackgroundColor(const glm::vec3& color) { m_BackgroundColor = color; }
+
     glm::vec2 getCursorWorldPos(const glm::vec2& cursorPos, float aspectRatio, float zoom, float windowWidth, float windowHeight);
 private:
     void updateIsometricView();

include/render/VertexCache.h

@@ -12,15 +12,19 @@ namespace render {
 class VertexCache {
 
     typedef std::vector<float> Vector;
-    typedef std::pair<Vector::iterator, Vector::iterator> ElementsIndex;
-    typedef std::pair<ElementsIndex, ElementsIndex> DataIndex;
+
+    struct DataIndex {
+        Vector position;
+        Vector color;
+    };
 
 private:
-    Vector m_Positions;
-    Vector m_Colors;
+    std::size_t m_VertexCount;
     std::unordered_map<std::uint64_t, DataIndex> m_Indexes;
     std::unique_ptr<GL::VertexArray> m_VertexArray;
 public:
+    VertexCache() : m_VertexCount(0) {}
+
     void addData(std::uint64_t index, std::vector<float> positions, std::vector<float> colors);
     void removeData(std::uint64_t index);
     void clear();

include/render/WorldRenderer.h

@@ -7,6 +7,7 @@
 
 #include "render/gui/TowerPlacePopup.h"
 #include "render/gui/MobTooltip.h"
+#include "render/gui/CastleTooltip.h"
 
 #include "render/gui/imgui/imgui.h"
 
@@ -23,7 +24,7 @@ class ClientGame;
 
 namespace render {
 
-class WorldRenderer {
+class WorldRenderer : public game::WorldListener {
 private:
     client::ClientGame* m_Client;
     Renderer* m_Renderer;
@@ -40,15 +41,13 @@ private:
 
     std::unique_ptr<gui::TowerPlacePopup> m_TowerPlacePopup;
     std::unique_ptr<gui::MobTooltip> m_MobTooltip;
+    std::unique_ptr<gui::CastleTooltip> m_CastleTooltip;
 public:
     WorldRenderer(game::World* world, client::ClientGame* client);
     ~WorldRenderer();
 
     void loadModels();
 
-    void addTower(game::TowerPtr tower);
-    void removeTower(game::TowerPtr tower);
-
     static ImVec4 getImGuiTeamColor(game::TeamColor color);
 
     void update();
@@ -58,6 +57,11 @@ public:
 
     void moveCam(float relativeX, float relativeY, float aspectRatio);
     void changeZoom(float zoom);
+
+    // WorldListener
+
+    virtual void OnTowerAdd(game::TowerPtr tower);
+    virtual void OnTowerRemove(game::TowerPtr tower);
 private:
     void click();
     void renderWorld() const;
@@ -67,8 +71,12 @@ private:
     void renderPopups();
     void renderTowerUpgradePopup();
     void renderMobTooltip() const;
+    void renderCastleTooltip() const;
     void detectClick();
     void detectMobHovering() const;
+    void detectCastleHovering() const;
+    void renderTooltips() const;
+    void removeTower();
     glm::vec2 getCursorWorldPos() const;
     glm::vec2 getClickWorldPos() const;
 

include/render/gui/CastleTooltip.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "GuiWidget.h"
+
+namespace td {
+
+namespace game {
+
+class TeamCastle;
+
+} // namespace game
+
+namespace gui {
+
+class CastleTooltip : public GuiWidget {
+private:
+    const game::TeamCastle* m_Castle;
+public:
+    CastleTooltip(client::Client* client);
+
+    virtual void render();
+
+    void setCastle(const game::TeamCastle* castle) { m_Castle = castle; }
+    bool isShown() { return m_Castle != nullptr; }
+};
+
+} // namespace gui
+} // namespace td

include/render/gui/GuiManager.h

@@ -10,15 +10,17 @@ namespace gui {
 
 class GuiManager {
 private:
-    std::vector<std::shared_ptr<GuiWidget>> m_Widgets;
+    std::vector<std::unique_ptr<GuiWidget>> m_Widgets;
 public:
+    GuiManager(){}
+
     void renderWidgets() {
-        for (auto widget : m_Widgets) {
+        for (auto& widget : m_Widgets) {
             widget->render();
         }
     }
 
-    void addWidgets(const std::shared_ptr<GuiWidget>& widget) {
+    void addWidget(std::unique_ptr<GuiWidget>&& widget) {
         m_Widgets.push_back(std::move(widget));
     }
 };

include/render/gui/MobTooltip.h

@@ -21,6 +21,7 @@ public:
     virtual void render();
 
     void setMob(const game::Mob* mob) { m_Mob = mob; }
+    bool isShown() { return m_Mob != nullptr; }
 };
 
 } // namespace gui

include/render/gui/TowerGui.h

@@ -9,6 +9,8 @@
 
 #include <memory>
 
+#include "render/gui/GuiManager.h"
+
 struct SDL_Window;
 typedef void* SDL_GLContext;
 
@@ -20,15 +22,6 @@ class Client;
 
 } // namespace client
 
-namespace gui {
-
-class MainMenu;
-class GameMenu;
-class FrameMenu;
-class UpdateMenu;
-
-} // namespace gui
-
 namespace render {
 
 class Renderer;
@@ -38,11 +31,8 @@ private:
     SDL_Window* m_Window;
     SDL_GLContext m_GlContext;
     td::render::Renderer* m_Renderer;
+    td::gui::GuiManager m_GuiManager;
     std::unique_ptr<td::client::Client> m_Client;
-    std::unique_ptr<td::gui::MainMenu> m_MainMenu;
-    std::unique_ptr<td::gui::GameMenu> m_GameMenu;
-    std::unique_ptr<td::gui::FrameMenu> m_FrameMenu;
-    std::unique_ptr<td::gui::UpdateMenu> m_UpdateMenu;
 public:
     TowerGui(SDL_Window* wndow, SDL_GLContext glContext, td::render::Renderer* renderer);
     ~TowerGui();

include/render/gui/UpdateMenu.h

@@ -2,7 +2,7 @@
 
 #include "GuiWidget.h"
 
-#include "misc/Updater.h"
+#include "updater/Updater.h"
 
 #include <future>
 

include/updater/Updater.h

@@ -1,10 +1,8 @@
 #pragma once
 
-#include "DataBuffer.h"
+#include "misc/DataBuffer.h"
 
-#include <ctime>
-
-#define TD_VERSION "alpha-0.0.2"
+#define TD_VERSION "alpha-0.2.0"
 
 namespace td {
 namespace utils {

src/TowerDefense.cpp

@@ -6,14 +6,26 @@
 // Description : Hello World in C++, Ansi-style
 //============================================================================
 
+#if !defined(NDEBUG) && !defined(_WIN32)
+#define BACKWARD_HAS_UNWIND 1
+#define BACKWARD_HAS_DW 1
+#endif
+
 #include "window/Display.h"
-#include "misc/Updater.h"
+#include "updater/Updater.h"
+#include "misc/Backward.hpp"
 
 #ifdef __ANDROID__
 extern "C"
 #endif
 
 int main(int argc, const char* args[]) {
+    #if !defined(NDEBUG)
+    // setup signal handling
+    backward::SignalHandling sh;
+    #endif
+
+    // remove the outdated binary
     td::utils::Updater::removeOldFile();
 
     Display::create();

src/game/BaseGame.cpp

@@ -17,5 +17,21 @@ void Game::tick(std::uint64_t delta) {
     }
 }
 
+Player* Game::getPlayerById(PlayerID id) {
+    auto it = m_Players.find(id);
+
+    if (it == m_Players.end()) return nullptr;
+
+    return &it->second;
+}
+
+const Player* Game::getPlayerById(PlayerID id) const {
+    auto it = m_Players.find(id);
+
+    if (it == m_Players.end()) return nullptr;
+
+    return &it->second;
+}
+
 } // namespace game 
 } // namespace td

src/game/Mobs.cpp

@@ -1,4 +1,6 @@
 #include "game/Mobs.h"
+#include "game/Player.h"
+#include "game/World.h"
 
 #include <map>
 #include <algorithm>
@@ -18,7 +20,7 @@ EffectDuration& Mob::getEffect(EffectType effectType) {
     return *std::find_if(m_Effects.begin(), m_Effects.end(), [&effectType](EffectDuration effect) { return effect.type == effectType;});
 }
 
-void Mob::addEffect(EffectType effectType, float durationSec, const Tower* tower) {
+void Mob::addEffect(EffectType effectType, float durationSec, Tower* tower) {
     if (isImmuneTo(effectType))
         return;
     if (hasEffect(effectType)) {
@@ -30,11 +32,176 @@ void Mob::addEffect(EffectType effectType, float durationSec, const Tower* tower
     }
 }
 
-void Mob::tick(std::uint64_t delta) {
-    updateEffects(delta);
+void Mob::attackCastle(std::uint64_t delta, World* world) {
+    if(!hasReachedEnemyCastle()) return;
+    
+    if (m_AttackTimer.update(delta)) {
+        world->getMobNotifier().notifyListeners(&MobListener::OnMobCastleDamage, this, m_CastleTarget, getStats()->getDamage());
+        m_AttackTimer.applyCooldown();
+    }
 }
 
-void Mob::updateEffects(std::uint64_t delta) {
+void Mob::walk(std::uint64_t delta, World* world) {
+    float mobWalkSpeed = getStats()->getMovementSpeed();
+
+    float walkAmount = mobWalkSpeed * ((float)delta / 1000.0f);
+
+    if (hasEffect(EffectType::Slowness))
+        walkAmount *= 0.70; // walk 30% slower
+
+    switch (getDirection()) {
+    case Direction::NegativeX: {
+        setCenterX(getCenterX() - walkAmount);
+        break;
+    }
+    case Direction::PositiveX: {
+        setCenterX(getCenterX() + walkAmount);
+        break;
+    }
+    case Direction::NegativeY: {
+        setCenterY(getCenterY() - walkAmount);
+        break;
+    }
+    case Direction::PositiveY: {
+        setCenterY(getCenterY() + walkAmount);
+        break;
+    }
+    }
+}
+
+void Mob::move(std::uint64_t delta, World* world) {
+    TilePtr tile = world->getTile(getCenter().getX(), getCenter().getY());
+
+    if (tile != nullptr && tile->getType() == TileType::Walk) {
+        WalkableTilePtr walkTile = std::static_pointer_cast<WalkableTile>(tile);
+        changeDirection(*walkTile, world);
+    }
+
+    if (hasReachedEnemyCastle()) return;
+
+    walk(delta, world);
+
+    TeamColor mobTeam = world->getPlayerById(getSender())->getTeamColor();
+
+    TeamCastle* enemyCastle = nullptr;
+
+    if (mobTeam == TeamColor::Red) {
+        enemyCastle = &world->getBlueTeam().getCastle();
+    } else if (mobTeam == TeamColor::Blue) {
+        enemyCastle = &world->getRedTeam().getCastle();
+    }
+
+    if (isTouchingCastle(*enemyCastle)) {
+        moveBack(*enemyCastle, world);
+        setMobReachedCastle(enemyCastle);
+
+        world->getMobNotifier().notifyListeners(&MobListener::OnMobTouchCastle, this, enemyCastle);
+    }
+}
+
+void Mob::moveBack(const TeamCastle& enemyCastle, World* world) {
+    switch (getDirection()) {
+    case Direction::NegativeX: {
+        setCenterX(enemyCastle.getBottomRight().getX() + getWidth() / 2.0f);
+        break;
+    }
+    case Direction::PositiveX: {
+        setCenterX(enemyCastle.getTopLeft().getX() - getWidth() / 2.0f);
+        break;
+    }
+    case Direction::NegativeY: {
+        setCenterY(enemyCastle.getBottomRight().getY() + getHeight() / 2.0f);
+        break;
+    }
+    case Direction::PositiveY: {
+        setCenterY(enemyCastle.getTopLeft().getY() - getHeight() / 2.0f);
+        break;
+    }
+    }
+}
+
+void Mob::changeDirection(const WalkableTile& tile, World* world) {
+    if (getDirection() == tile.direction) return;
+
+    float tileX = static_cast<float>(static_cast<std::int32_t>(getCenterX()));
+    float tileY = static_cast<float>(static_cast<std::int32_t>(getCenterY()));
+
+    switch (getDirection()) {
+
+    case Direction::PositiveY: {
+        if (tile.direction == Direction::NegativeX) {
+            if (getTileY() > getTileX()) {
+                setCenterY(tileY + getTileX());
+                setDirection(tile.direction);
+            }
+        } else { // tile->direction = Direction::PositiveX
+            if (getTileY() > 1 - getTileX()) {
+                setCenterY(tileY + (1 - getTileX()));
+                setDirection(tile.direction);
+            }
+        }
+        return;
+    }
+
+    case Direction::NegativeY: {
+        if (tile.direction == Direction::PositiveX) {
+            if (getTileY() < getTileX()) {
+                setCenterY(tileY + getTileX());
+                setDirection(tile.direction);
+            }
+        } else { // tile.direction = Direction::NegativeX
+            if (getTileY() < 1 - getTileX()) {
+                setCenterY(tileY + (1 - getTileX()));
+                setDirection(tile.direction);
+            }
+        }
+        return;
+    }
+
+    case Direction::PositiveX: {
+        if (tile.direction == Direction::NegativeY) {
+            if (getTileX() > getTileY()) {
+                setCenterX(tileX + getTileY());
+                setDirection(tile.direction);
+            }
+        } else { // tile.direction = Direction::PositiveY
+            if (getTileX() > 1 - getTileY()) {
+                setCenterX(tileX + (1 - getTileY()));
+                setDirection(tile.direction);
+            }
+        }
+        return;
+    }
+
+    case Direction::NegativeX: {
+        if (tile.direction == Direction::PositiveY) {
+            if (getTileX() < getTileY()) {
+                setCenterX(tileX + getTileY());
+                setDirection(tile.direction);
+            }
+        } else { // tile.direction = Direction::NegativeY
+            if (getTileX() < 1 - getTileY()) {
+                setCenterX(tileX + (1 - getTileY()));
+                setDirection(tile.direction);
+            }
+        }
+        return;
+    }
+
+    }
+}
+
+bool Mob::isTouchingCastle(const TeamCastle& enemyCastle) const {
+    return enemyCastle.collidesWith(*this);
+}
+
+void Mob::tick(std::uint64_t delta, World* world) {
+    updateEffects(delta, world);
+    move(delta, world);
+    attackCastle(delta, world);
+}
+
+void Mob::updateEffects(std::uint64_t delta, World* world) {
     float deltaSec = (float)delta / 1000.0f;
     for (std::size_t i = 0; i < m_Effects.size(); i++) {
         EffectDuration& effect = m_Effects[i];
@@ -63,12 +230,12 @@ void Mob::updateEffects(std::uint64_t delta) {
     }
     if (hasEffect(EffectType::Fire)) {
         if (m_EffectFireTimer.update(delta)) {
-            damage(3, getEffect(EffectType::Fire).tower);
+            world->getMobNotifier().notifyListeners(&MobListener::OnMobDamage, this, 3.0f, getEffect(EffectType::Fire).tower);
         }
     }
     if (hasEffect(EffectType::Poison)) {
         if (m_EffectPoisonTimer.update(delta)) {
-            damage(1, getEffect(EffectType::Poison).tower);
+            world->getMobNotifier().notifyListeners(&MobListener::OnMobDamage, this, 1.0f, getEffect(EffectType::Poison).tower);
         }
     }
     if (hasEffect(EffectType::Heal)) {
@@ -235,7 +402,7 @@ const std::map<MobKey, EffectImmunities> MobsEffectImmunities = {
 
     {{MobType::Skeleton, 1},{}},
     {{MobType::Skeleton, 2},{}},
-    {{MobType::Skeleton, 3},{EffectType::Fire}},
+    {{MobType::Skeleton, 3},{}},
     {{MobType::Skeleton, 4},{EffectType::Fire}},
     {{MobType::Skeleton, 5},{EffectType::Fire}},
 

src/game/Team.cpp

@@ -5,7 +5,7 @@
 namespace td {
 namespace game {
 
-Team::Team(TeamColor color) : m_Color(color) {}
+Team::Team(TeamColor color) : m_Color(color), m_TeamCastle(this) {}
 
 void Team::addPlayer(Player* newPlayer) {
     m_Players.push_back(newPlayer);

src/game/Towers.cpp

@@ -21,8 +21,8 @@ const std::map<std::pair<TowerType, TowerLevel>, TowerStats> TowerConstants = {
     {{TowerType::Archer, {4, TowerPath::Top}}, {0.8, 0, 15}},
 
     {{TowerType::Archer, {2, TowerPath::Bottom}}, {2, 10, 12}},
-    {{TowerType::Archer, {3, TowerPath::Bottom}}, {2, 0, 13}},
-    {{TowerType::Archer, {4, TowerPath::Bottom}}, {2, 0, 15}},
+    {{TowerType::Archer, {3, TowerPath::Bottom}}, {2, 10, 13}},
+    {{TowerType::Archer, {4, TowerPath::Bottom}}, {2, 10, 15}},
 
     //-----------------------------------------------------------------
 
@@ -213,11 +213,11 @@ void ArcherTower::tick(std::uint64_t delta, World* world) {
         std::uint8_t arrows = explosiveArrows ? 2 : getLevel().getLevel();
         for (MobPtr mob : world->getMobList()) {
             if (isMobInRange(mob)) {
-                world->OnArrowShot(mob, this);
+                world->getWorldNotifier().notifyListeners(&WorldListener::OnArcherTowerShot, mob, this);
+                m_Timer.applyCooldown();
                 arrowsShot++;
                 if (arrowsShot >= arrows)
                     break;
-                m_Timer.applyCooldown();
             }
         }
     }
@@ -229,7 +229,8 @@ void IceTower::tick(std::uint64_t delta, World* world) {
         for (MobPtr mob : world->getMobList()) {
             if (isMobInRange(mob)) {
                 mob->addEffect(EffectType::Slowness, 1, this);    // slowness for 1s every second
-                mob->damage(damage, this);
+                if (damage > 0)
+                    world->getMobNotifier().notifyListeners(&MobListener::OnMobDamage, mob.get(), damage, this);
                 m_Timer.applyCooldown();
             }
         }
@@ -252,7 +253,7 @@ void PoisonTower::tick(std::uint64_t delta, World* world) {
         for (MobPtr mob : world->getMobList()) {
             if (isMobInRange(mob)) {
                 if (getLevel().getPath() == TowerPath::Bottom) {
-                    mob->damage(getStats()->getDamage(), this);
+                    world->getMobNotifier().notifyListeners(&MobListener::OnMobDamage, mob.get(), getStats()->getDamage(), this);
                 } else {
                     float durationSec;
                     switch (getLevel().getLevel()) {

src/game/World.cpp

@@ -13,7 +13,8 @@ namespace td {
 namespace game {
 
 World::World(Game* game) : m_Game(game) {
-
+    getWorldNotifier().bindListener(this);
+    getMobNotifier().bindListener(this);
 }
 
 TilePtr World::getTile(std::int32_t x, std::int32_t y) const {
@@ -36,6 +37,7 @@ bool World::loadMap(const protocol::WorldBeginDataPacket* worldHeader) {
     m_TowerPlacePalette = worldHeader->getTowerTilePalette();
     m_WalkablePalette = worldHeader->getWalkableTileColor();
     m_DecorationPalette = worldHeader->getDecorationPalette();
+    m_Background = worldHeader->getBackgroundColor();
 
     getRedTeam().getSpawn() = worldHeader->getRedSpawn();
     getBlueTeam().getSpawn() = worldHeader->getBlueSpawn();
@@ -43,7 +45,10 @@ bool World::loadMap(const protocol::WorldBeginDataPacket* worldHeader) {
     m_SpawnColorPalette = worldHeader->getSpawnPalette();
 
     getRedTeam().getCastle() = worldHeader->getRedCastle();
+    getRedTeam().getCastle().setTeam(&getRedTeam());
+
     getBlueTeam().getCastle() = worldHeader->getBlueCastle();
+    getBlueTeam().getCastle().setTeam(&getBlueTeam());
 
     m_TilePalette = worldHeader->getTilePalette();
 
@@ -101,7 +106,8 @@ bool World::saveMap(const std::string& fileName) const {
 }
 
 void World::tick(std::uint64_t delta) {
-    moveMobs(delta);
+    if (m_Game->getGameState() != GameState::Game) return;
+
     tickMobs(delta);
     for (TowerPtr tower : m_Towers) {
         tower->tick(delta, this);
@@ -114,6 +120,7 @@ void World::spawnMobAt(MobID id, MobType type, std::uint8_t level, PlayerID send
     mob->setCenter({ x, y });
     mob->setDirection(dir);
     m_Mobs.push_back(mob);
+    getMobNotifier().notifyListeners(&MobListener::OnMobSpawn, mob.get());
 }
 
 TowerPtr World::placeTowerAt(TowerID id, TowerType type, std::int32_t x, std::int32_t y, PlayerID builder) {
@@ -122,89 +129,20 @@ TowerPtr World::placeTowerAt(TowerID id, TowerType type, std::int32_t x, std::in
     return tower;
 }
 
+TowerPtr World::removeTower(TowerID towerId) {
+    auto it = std::find_if(m_Towers.begin(), m_Towers.end(), [towerId](TowerPtr tower) { return tower->getID() == towerId;});
+    if (it == m_Towers.end()) return nullptr;
+
+    TowerPtr tower = *it;
+
+    m_Towers.erase(it);
+
+    return tower;
+}
+
 void World::tickMobs(std::uint64_t delta) {
     for (MobPtr mob : m_Mobs) {
-        mob->tick(delta);
-    }
-}
-
-void World::moveMobs(std::uint64_t delta) {
-    for (MobPtr mob : m_Mobs) {
-        TilePtr tile = getTile(mob->getCenter().getX(), mob->getCenter().getY());
-
-        if (tile != nullptr && tile->getType() == TileType::Walk) {
-            WalkableTile* walkTile = dynamic_cast<WalkableTile*>(tile.get());
-            mob->setDirection(walkTile->direction);
-        }
-
-        moveMob(mob, delta);
-
-        TeamColor mobTeam = m_Game->getPlayerById(mob->getSender()).getTeamColor();
-
-        const TeamCastle* enemyCastle;
-
-        if (mobTeam == TeamColor::Red) {
-            enemyCastle = &getBlueTeam().getCastle();
-        } else if (mobTeam == TeamColor::Blue) {
-            enemyCastle = &getRedTeam().getCastle();
-        }
-
-        if (isMobTouchingCastle(mob, *enemyCastle)) {
-            moveBackMob(mob, *enemyCastle);
-        }
-    }
-}
-
-void World::moveMob(MobPtr mob, std::uint64_t delta) {
-    float mobWalkSpeed = mob->getStats()->getMovementSpeed();
-
-    float walkAmount = mobWalkSpeed * ((float)delta / 1000.0f);
-
-    if (mob->hasEffect(EffectType::Slowness))
-        walkAmount *= 0.70; // walk 30% slower
-
-    switch (mob->getDirection()) {
-    case Direction::NegativeX: {
-        mob->setCenterX(mob->getCenterX() - walkAmount);
-        break;
-    }
-    case Direction::PositiveX: {
-        mob->setCenterX(mob->getCenterX() + walkAmount);
-        break;
-    }
-    case Direction::NegativeY: {
-        mob->setCenterY(mob->getCenterY() - walkAmount);
-        break;
-    }
-    case Direction::PositiveY: {
-        mob->setCenterY(mob->getCenterY() + walkAmount);
-        break;
-    }
-    }
-}
-
-bool World::isMobTouchingCastle(MobPtr mob, const TeamCastle& enemyCastle) const {
-    return enemyCastle.collidesWith(*mob);
-}
-
-void World::moveBackMob(MobPtr mob, const TeamCastle& enemyCastle) {
-    switch (mob->getDirection()) {
-    case Direction::NegativeX: {
-        mob->setCenterX(enemyCastle.getBottomRight().getX() + mob->getWidth() / 2.0f);
-        break;
-    }
-    case Direction::PositiveX: {
-        mob->setCenterX(enemyCastle.getTopLeft().getX() - mob->getWidth() / 2.0f);
-        break;
-    }
-    case Direction::NegativeY: {
-        mob->setCenterY(enemyCastle.getBottomRight().getY() + mob->getHeight() / 2.0f);
-        break;
-    }
-    case Direction::PositiveY: {
-        mob->setCenterY(enemyCastle.getTopLeft().getY() - mob->getHeight() / 2.0f);
-        break;
-    }
+        mob->tick(delta, this);
     }
 }
 
@@ -284,19 +222,11 @@ bool World::CanPlaceBigTower(const glm::vec2& worldPos, PlayerID playerID) const
 }
 
 void World::cleanDeadMobs() {
+    // safely remove mobs when unused
     for (std::size_t i = 0; i < m_Mobs.size(); i++) {
         MobPtr mob = m_Mobs[i];
         if (mob->isDead()) {
-            if (mob->OnDeath(this)) {
-                //reward players
-                Player& sender = m_Game->getPlayerById(mob->getSender());
-                sender.addExp(mob->getStats()->getExpReward());
-
-                Player& killer = m_Game->getPlayerById(mob->getLastDamageTower()->getBuilder());
-                killer.addGold(mob->getStats()->getMoneyCost());
-
-                m_Mobs.erase(m_Mobs.begin() + i);
-            }
+            m_Mobs.erase(m_Mobs.begin() + i);
         }
     }
 }
@@ -324,12 +254,44 @@ TowerPtr World::getTowerById(TowerID towerID) {
     return *it;
 }
 
-void World::OnArrowShot(MobPtr target, Tower* shooter) {
-    bool explosiveArrows = shooter->getLevel().getPath() == TowerPath::Bottom;
+void World::OnArcherTowerShot(MobPtr target, ArcherTower* shooter) {
+    bool fireArrows = shooter->getLevel().getPath() == TowerPath::Bottom;
+    bool explosiveArrows = shooter->getLevel().getLevel() == 4 && fireArrows;
+
+    getWorldNotifier().notifyListeners(&WorldListener::OnArrowShot, target, fireArrows, shooter);
     if (explosiveArrows) {
-        // aoe damage
-    } else {
-        target->damage(shooter->getStats()->getDamage(), shooter);
+        getWorldNotifier().notifyListeners(&WorldListener::OnExplosion, utils::shape::Circle{ target->getCenterX(), target->getCenterY(), ArcherTower::ExplosionRadius }, shooter->getStats()->getDamage(), shooter);
+    }
+}
+
+void World::OnArrowShot(MobPtr target, bool fireArrow, Tower* shooter) {
+    getMobNotifier().notifyListeners(&MobListener::OnMobDamage, target.get(), shooter->getStats()->getDamage(), shooter);
+    if (fireArrow) {
+        target->addEffect(EffectType::Fire, ArcherTower::FireDurationSec, shooter);
+    }
+}
+
+void World::OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter) {
+    for (MobPtr mob : m_Mobs) {
+        if (mob->isAlive() && mob->collidesWith(explosion)) {
+            // linear distance damage reduction
+            float explosionDamage = mob->distance(explosion) / explosion.getRadius() * centerDamage;
+            getMobNotifier().notifyListeners(&MobListener::OnMobDamage, mob.get(), explosionDamage, shooter);
+        }
+    }
+}
+
+void World::OnMobCastleDamage(Mob* damager, TeamCastle* enemyCastle, float damage) {
+    enemyCastle->damage(damage);
+    if (enemyCastle->getLife() <= 0) {
+        m_Game->notifyListeners(&GameListener::OnGameEnd);
+    }
+}
+
+void World::OnMobDamage(Mob* target, float damage, Tower* source) {
+    target->damage(damage, source);
+    if (target->isDead()) {
+        getMobNotifier().notifyListeners(&MobListener::OnMobDie, target);
     }
 }
 
@@ -357,5 +319,13 @@ const Team& World::getTeam(TeamColor team) const {
     return m_Game->getTeam(team);
 }
 
+const Player* World::getPlayerById(PlayerID id) const {
+    return m_Game->getPlayerById(id);
+}
+
+const TeamList& World::getTeams() const {
+    return m_Game->getTeams();
+}
+
 } // namespace game
 } // namespace td

src/game/client/Client.cpp

@@ -40,13 +40,19 @@ void Client::tick(std::uint64_t delta) {
     m_Connected = m_Connexion.updateSocket();
     if (!m_Connected) {
         std::cout << "Disconnected ! (Reason : " << m_Connexion.getDisconnectReason() << ")\n";
+        reset();
     } else {
-        m_Game.tick(delta);
+        m_Game->tick(delta);
     }
 }
 
 void Client::render() {
-    m_Game.renderWorld();
+    m_Game->renderWorld();
+}
+
+void Client::reset() {
+    m_Game.reset(0);
+    m_Game = std::make_unique<ClientGame>(this);
 }
 
 void Client::sendMobs(const std::vector<protocol::MobSend>& mobSends) {
@@ -64,5 +70,10 @@ void Client::upgradeTower(game::TowerID tower, game::TowerLevel level) {
     m_Connexion.sendPacket(&packet);
 }
 
+void Client::removeTower(game::TowerID tower) {
+    protocol::RemoveTowerPacket packet(tower);
+    m_Connexion.sendPacket(&packet);
+}
+
 } // namespace client
 } // namespace td

src/game/client/ClientConnexion.cpp

@@ -4,7 +4,7 @@
 namespace td {
 namespace client {
 
-ClientConnexion::ClientConnexion() : Connexion(&m_Dispatcher) {
+ClientConnexion::ClientConnexion() : Connexion(&m_Dispatcher), m_ServerTPS(0) {
     registerHandlers();
 }
 

src/game/client/ClientGame.cpp

@@ -1,10 +1,7 @@
 #include "game/client/ClientGame.h"
 #include "protocol/PacketDispatcher.h"
-//#include "game/Team.h"
 #include "game/client/Client.h"
 
-#include <iostream>
-
 namespace td {
 namespace client {
 
@@ -21,7 +18,6 @@ m_WorldRenderer(&m_WorldClient, this) {
     GetDispatcher()->RegisterHandler(protocol::PacketType::UpdateMoney, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::Disconnect, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::WorldData, this);
-    GetDispatcher()->RegisterHandler(protocol::PacketType::WorldAddTower, this);
 }
 
 ClientGame::~ClientGame() {
@@ -97,6 +93,7 @@ void ClientGame::HandlePacket(const protocol::UpdateMoneyPacket* packet) {
 
 void ClientGame::HandlePacket(const protocol::DisconnectPacket* packet) {
     m_GameState = game::GameState::Disconnected;
+    m_Renderer->setBackgroundColor({ 0, 0, 0 });
 }
 
 void ClientGame::HandlePacket(const protocol::WorldDataPacket* packet) {
@@ -112,9 +109,5 @@ void ClientGame::renderWorld() {
     }
 }
 
-void ClientGame::HandlePacket(const protocol::WorldAddTowerPacket* packet) {
-    m_WorldRenderer.addTower(m_WorldClient.placeTowerAt(packet->getTowerID(), packet->getTowerType(), packet->getTowerX(), packet->getTowerY(), packet->getBuilder()));
-}
-
 } // namespace client
 } // namespace td

src/game/client/WorldClient.cpp

@@ -7,14 +7,23 @@ namespace td {
 namespace client {
 
 WorldClient::WorldClient(ClientGame* game) : game::World(game), protocol::PacketHandler(game->GetDispatcher()), m_Game(game) {
+    GetDispatcher()->RegisterHandler(protocol::PacketType::WorldAddTower, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::WorldBeginData, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::WorldData, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::SpawnMob, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::UpgradeTower, this);
+    GetDispatcher()->RegisterHandler(protocol::PacketType::RemoveTower, this);
+    GetDispatcher()->RegisterHandler(protocol::PacketType::UpdateCastleLife, this);
+    GetDispatcher()->RegisterHandler(protocol::PacketType::UpdateMobStates, this);
 }
 
 void WorldClient::HandlePacket(const protocol::WorldBeginDataPacket* packet) {
     loadMap(packet);
+    if (m_Game->getGameState() == game::GameState::Game) {
+        const game::Color& backgroundColor = getBackgroundColor();
+        m_Game->getRenderer()->setBackgroundColor({ static_cast<float>(backgroundColor.r / 255.0f), static_cast<float>(backgroundColor.g / 255.0f),
+            static_cast<float>(backgroundColor.b / 255.0f) });
+    }
 }
 
 void WorldClient::HandlePacket(const protocol::WorldDataPacket* packet) {
@@ -32,8 +41,35 @@ void WorldClient::HandlePacket(const protocol::UpgradeTowerPacket* packet) {
     tower->upgrade(packet->getTowerLevel().getLevel(), packet->getTowerLevel().getPath());
 }
 
-void WorldClient::OnArrowShot(game::MobPtr target, game::Tower* tower) {
-    World::OnArrowShot(target, tower);
+void WorldClient::HandlePacket(const protocol::WorldAddTowerPacket* packet) {
+    game::TowerPtr newTower = placeTowerAt(packet->getTowerID(), packet->getTowerType(), packet->getTowerX(), packet->getTowerY(), packet->getBuilder());
+
+    getWorldNotifier().notifyListeners(&WorldListener::OnTowerAdd, newTower);
+}
+
+void WorldClient::HandlePacket(const protocol::RemoveTowerPacket* packet) {
+    game::TowerPtr tower = removeTower(packet->getTowerID());
+
+    if (tower != nullptr) {
+        getWorldNotifier().notifyListeners(&WorldListener::OnTowerRemove, tower);
+    }
+}
+
+void WorldClient::HandlePacket(const protocol::UpdateMobStatesPacket* packet) {
+    for (auto mobState : packet->getMobStates()) {
+        game::MobID mobId = mobState.getMobId();
+        auto it = std::find_if(getMobList().begin(), getMobList().end(), [mobId](game::MobPtr mob) { return mob->getMobID() == mobId; });
+        if (it != getMobList().end()) {
+            game::MobPtr& mob = *it;
+            mob->setCenter(mobState.getMobPosition());
+            mob->setDirection(mobState.getMobDirection());
+            mob->setHealth(mobState.getMobLife());
+        }
+    }
+}
+
+void WorldClient::HandlePacket(const protocol::UpdateCastleLifePacket* packet) {
+    getTeam(packet->getTeamColor()).getCastle().setLife(packet->getCastleLife());
 }
 
 } // namespace client

src/game/server/Lobby.cpp

@@ -37,10 +37,8 @@ void Lobby::tick() {
         return;
 
     if (utils::getTime() - m_StartTimerTime >= LobbyWaitingTime) {
-        protocol::UpdateGameStatePacket packet(game::GameState::Game);
-        m_Server->broadcastPacket(&packet);
+        m_Server->getGame().notifyListeners(&game::GameListener::OnGameBegin);
         m_GameStarted = true;
-        m_Server->lauchGame();
         return;
     }
 

src/game/server/Server.cpp

@@ -9,8 +9,9 @@ Server::Server(const std::string& worldFilePath) : m_ServerRunning(false) {
     m_Game.getWorld()->loadMapFromFile(worldFilePath);
 }
 
-void Server::lauchGame() {
-    m_Game.startGame();
+Server::~Server() {
+    if (m_Thread.joinable())
+        m_Thread.join();
 }
 
 void Server::startThread() {
@@ -29,13 +30,16 @@ void Server::startThread() {
             }
 
         }
+        clean();
         });
 }
 
+void Server::close() {
+    stopThread();
+}
+
 void Server::stopThread() {
     m_ServerRunning = false;
-    if (m_Thread.joinable())
-        m_Thread.join();
 }
 
 bool Server::start(std::uint16_t port) {
@@ -54,19 +58,24 @@ bool Server::start(std::uint16_t port) {
     return true;
 }
 
-void Server::stop() {
-    if (!m_ServerRunning)
-        return;
-    stopThread();
-
-    protocol::DisconnectPacket packet("Server closed");
-    broadcastPacket(&packet);
-
+void Server::clean() {
     m_Listener.close();
     m_Listener.destroy();
 
     m_Connections.clear();
     getPlayers().clear();
+
+    std::cout << "Server successfully stopped !\n";
+}
+
+void Server::stop() {
+    if (!m_ServerRunning)
+        return;
+
+    protocol::DisconnectPacket packet("Server closed");
+    broadcastPacket(&packet);
+
+    stopThread();
 }
 
 void Server::tick(std::uint64_t delta) {

src/game/server/ServerConnexion.cpp

@@ -41,6 +41,7 @@ void ServerConnexion::registerHandlers() {
     GetDispatcher()->RegisterHandler(protocol::PacketType::PlaceTower, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::SendMobs, this);
     GetDispatcher()->RegisterHandler(protocol::PacketType::UpgradeTower, this);
+    GetDispatcher()->RegisterHandler(protocol::PacketType::RemoveTower, this);
 }
 
 bool ServerConnexion::updateSocket() {
@@ -159,6 +160,8 @@ void ServerConnexion::HandlePacket(const protocol::PlaceTowerPacket* packet) {
 
     game::TowerPtr tower = world->placeTowerAt(towerType, packet->getTowerX(), packet->getTowerY(), m_ID);
 
+    world->getWorldNotifier().notifyListeners(&game::WorldListener::OnTowerAdd, tower);
+
     protocol::WorldAddTowerPacket addTowerPacket(tower->getID(), packet->getTowerX(), packet->getTowerY(), packet->getTowerType(), m_ID);
     m_Server->broadcastPacket(&addTowerPacket);
 }
@@ -179,6 +182,12 @@ void ServerConnexion::HandlePacket(const protocol::UpgradeTowerPacket* packet) {
     m_Server->broadcastPacket(packet);
 }
 
+void ServerConnexion::HandlePacket(const protocol::RemoveTowerPacket* packet) {
+    //TODO: verify the packet
+
+    m_Server->broadcastPacket(packet);
+}
+
 ServerConnexion::~ServerConnexion() {
     if (GetDispatcher() != nullptr)
         GetDispatcher()->UnregisterHandler(this);

src/game/server/ServerGame.cpp

@@ -4,14 +4,22 @@
 namespace td {
 namespace server {
 
-ServerGame::ServerGame(server::Server* server) : game::Game(&m_ServerWorld), m_Server(server), m_ServerWorld(server, this) {
-
+ServerGame::ServerGame(server::Server* server) : game::Game(&m_ServerWorld), m_Server(server), m_ServerWorld(server, this),
+m_GoldMineTimer{ 1000, std::bind(&ServerGame::updateGoldMines, this) },
+m_MobStatesTimer{ 5000, std::bind(&ServerGame::updateMobStates, this) },
+m_EndGameCooldown{ 1000 * 10 } {
+    bindListener(this);
 }
 
 void ServerGame::tick(std::uint64_t delta) {
     if (m_GameState == game::GameState::Game) {
         Game::tick(delta);
+        m_MobStatesTimer.update(delta);
         updatePlayerStats();
+    } else if (m_GameState == game::GameState::EndGame) {
+        if (m_EndGameCooldown.update(delta)) {
+            notifyListeners(&game::GameListener::OnGameClose);
+        }
     }
 }
 
@@ -51,6 +59,14 @@ void ServerGame::updateGoldMines() {
     }
 }
 
+void ServerGame::updateMobStates() {
+    protocol::UpdateMobStatesPacket packet;
+    for (auto mob : m_World->getMobList()) {
+        packet.addMobState({ mob->getMobID(), mob->getCenter(), mob->getHealth(), mob->getDirection() });
+    }
+    m_Server->broadcastPacket(&packet);
+}
+
 void ServerGame::balanceTeams() {
     for (auto& playerInfo : Game::m_Players) {
         game::Player& player = playerInfo.second;
@@ -70,5 +86,31 @@ void ServerGame::balanceTeams() {
     }
 }
 
+void ServerGame::OnGameStateUpdate(game::GameState newState) {
+    setGameState(newState);
+    protocol::UpdateGameStatePacket packet(newState);
+    m_Server->broadcastPacket(&packet);
+}
+
+void ServerGame::OnGameBegin() {
+    notifyListeners(&game::GameListener::OnGameStateUpdate, game::GameState::Game);
+    startGame();
+}
+
+void ServerGame::OnGameEnd() {
+    notifyListeners(&game::GameListener::OnGameStateUpdate, game::GameState::EndGame);
+    m_EndGameCooldown.applyCooldown();
+}
+
+void ServerGame::OnGameClose() {
+    notifyListeners(&game::GameListener::OnGameStateUpdate, game::GameState::Closed);
+    // Disconnect clients
+    protocol::DisconnectPacket packet("Game finished");
+    m_Server->broadcastPacket(&packet);
+
+    // Closing server
+    m_Server->close();
+}
+
 } // namespace game
 } // namespace td

src/game/server/ServerWorld.cpp

@@ -22,17 +22,23 @@ void ServerWorld::spawnMobs(game::MobType type, std::uint8_t level, game::Player
             enemyMobSpawn = &getTeam(game::TeamColor::Red).getSpawn();
         }
 
-        std::int32_t spawnCenterX = enemyMobSpawn->getCenterX();
-        std::int32_t spawnCenterY = enemyMobSpawn->getCenterY();
+        float spawnWidth = enemyMobSpawn->getWidth();
+        float spawnHeight = enemyMobSpawn->getHeight();
 
-        std::int32_t minSpawnY = spawnCenterY - 2;
-        std::int32_t maxSpawnY = spawnCenterY + 2;
+        float spawnCenterX = enemyMobSpawn->getCenterX();
+        float spawnCenterY = enemyMobSpawn->getCenterY();
 
-        std::int32_t minSpawnX = spawnCenterX - 2;
-        std::int32_t maxSpawnX = spawnCenterX + 2;
+        auto mobStats = getMobStats(type, level);
+        auto mobSize = mobStats->getSize();
 
-        float mobX = utils::getRandomReal<float>(minSpawnX, maxSpawnX);
-        float mobY = utils::getRandomReal<float>(minSpawnY, maxSpawnY);
+        float minSpawnX = spawnCenterX - spawnWidth / 2.0f + mobSize.x / 2.0f;
+        float maxSpawnX = spawnCenterX + spawnWidth / 2.0f - mobSize.x / 2.0f;
+
+        float minSpawnY = spawnCenterY - spawnHeight / 2.0f + mobSize.y / 2.0f;
+        float maxSpawnY = spawnCenterY + spawnHeight / 2.0f - mobSize.y / 2.0f;
+
+        float mobX = utils::getRandomReal<float>(minSpawnX + MobSpawnBorder, maxSpawnX - MobSpawnBorder);
+        float mobY = utils::getRandomReal<float>(minSpawnY + MobSpawnBorder, maxSpawnY - MobSpawnBorder);
 
         spawnMobAt(m_CurrentMobID, type, level, sender, mobX, mobY, enemyMobSpawn->getDirection());
 
@@ -49,8 +55,23 @@ game::TowerPtr ServerWorld::placeTowerAt(game::TowerType type, std::int32_t x, s
     return tower;
 }
 
-void ServerWorld::OnArrowShot(game::MobPtr target, game::Tower* shooter) {
-    World::OnArrowShot(target, shooter);
+void ServerWorld::OnMobDie(game::Mob* mob) {
+    if (mob->OnDeath(this)) { // check if the mob is actually dead (slimes ...)
+        //reward players
+        game::Player* sender = m_Game->getPlayerById(mob->getSender());
+        sender->addExp(mob->getStats()->getExpReward());
+
+        game::Player* killer = m_Game->getPlayerById(mob->getLastDamageTower()->getBuilder());
+        killer->addGold(mob->getStats()->getMoneyCost());
+    }
+}
+
+void ServerWorld::OnMobCastleDamage(game::Mob* damager, game::TeamCastle* enemyCastle, float damage) {
+    // calling base class event
+    World::OnMobCastleDamage(damager, enemyCastle, damage);
+
+    protocol::UpdateCastleLifePacket packet(enemyCastle->getLife(), enemyCastle->getTeam()->getColor());
+    m_Server->broadcastPacket(&packet);
 }
 
 } // namespace server

src/misc/Shapes.cpp

@@ -39,6 +39,14 @@ bool Rectangle::collidesWith(const Circle& circle) const {
     return circle.collidesWith(*this);
 }
 
+float Rectangle::distance(const Circle& circle) const {
+    return circle.distance(*this);
+}
+
+float Rectangle::distanceSquared(const Circle& circle) const {
+    return circle.distanceSquared(*this);
+}
+
 
 
 
@@ -48,21 +56,29 @@ bool Circle::collidesWith(const Point& point) const {
 }
 
 bool Circle::collidesWith(const Rectangle& rect) const {
-    float closestX = std::clamp(m_Center.getX(), rect.getTopLeft().getX(), rect.getBottomRight().getX());
-    float closestY = std::clamp(m_Center.getY(), rect.getTopLeft().getY(), rect.getBottomRight().getY());
+    float distanceSquared_ = distanceSquared(rect);
 
-    float distanceX = m_Center.getX() - closestX;
-    float distanceY = m_Center.getY() - closestY;
-
-    float distanceSquared = (distanceX * distanceX) + (distanceY * distanceY);
-
-    return distanceSquared < m_Radius * m_Radius;
+    return distanceSquared_ < m_Radius* m_Radius;
 }
 
 bool Circle::collidesWith(const Circle& circle) const {
     return m_Radius + circle.getRadius() > m_Center.distanceSquared(circle.getCenter());
 }
 
+float Circle::distance(const Rectangle& rect) const {
+    return std::sqrt(distanceSquared(rect));
+}
+
+float Circle::distanceSquared(const Rectangle& rect) const {
+    float closestX = std::clamp(m_Center.getX(), rect.getTopLeft().getX(), rect.getBottomRight().getX());
+    float closestY = std::clamp(m_Center.getY(), rect.getTopLeft().getY(), rect.getBottomRight().getY());
+
+    float distanceX = m_Center.getX() - closestX;
+    float distanceY = m_Center.getY() - closestY;
+
+    return (distanceX * distanceX) + (distanceY * distanceY);
+}
+
 } // namespace shape
 } // namespace utils
 } // namespace td

src/protocol/PacketFactory.cpp

@@ -28,9 +28,11 @@ static std::map<PacketType, PacketCreator> packets = {
     {PacketType::SpawnMob,          []() -> PacketPtr {return std::make_unique<SpawnMobPacket>(); } },
     {PacketType::PlaceTower,        []() -> PacketPtr {return std::make_unique<PlaceTowerPacket>(); } },
     {PacketType::WorldAddTower,     []() -> PacketPtr {return std::make_unique<WorldAddTowerPacket>(); } },
-    {PacketType::WorldRemoveTower,  []() -> PacketPtr {return std::make_unique<WorldRemoveTowerPacket>(); } },
+    {PacketType::RemoveTower,       []() -> PacketPtr {return std::make_unique<RemoveTowerPacket>(); } },
     {PacketType::SendMobs,          []() -> PacketPtr {return std::make_unique<SendMobsPacket>(); } },
     {PacketType::UpgradeTower,      []() -> PacketPtr {return std::make_unique<UpgradeTowerPacket>(); } },
+    {PacketType::UpdateCastleLife,  []() -> PacketPtr {return std::make_unique<UpdateCastleLifePacket>(); } },
+    {PacketType::UpdateMobStates,   []() -> PacketPtr {return std::make_unique<UpdateMobStatesPacket>(); } },
 };
 
 PacketPtr createPacket(PacketType type, DataBuffer& buffer) {

src/protocol/Protocol.cpp

@@ -91,14 +91,16 @@ DataBuffer WorldBeginDataPacket::SerializeCustom() const {
 
     memcpy((std::uint8_t*)data.data() + bufferSize, decoTilePalette.data(), decoTilePalette.size() * sizeof(game::Color));
 
+    data << m_Header.m_Background;
+
     const game::Spawn& redSpawn = m_Header.m_RedSpawn, blueSpawn = m_Header.m_BlueSpawn;
     const game::TeamCastle& redCastle = m_Header.m_RedCastle, blueCastle = m_Header.m_BlueCastle;
 
-    data << redSpawn << redCastle;
-    data << blueSpawn << blueCastle;
+    data << redSpawn << static_cast<utils::shape::Rectangle>(redCastle);
+    data << blueSpawn << static_cast<utils::shape::Rectangle>(blueCastle);
 
     // tile palette
-    data << m_Header.m_TilePalette.size();
+    data << static_cast<std::uint64_t>(m_Header.m_TilePalette.size());
 
     for (game::TilePtr tile : m_Header.m_TilePalette) {
         data << tile;
@@ -123,14 +125,16 @@ DataBuffer WorldBeginDataPacket::Serialize() const {
 
     memcpy((std::uint8_t*)data.data() + bufferSize, decoTilePalette.data(), decoTilePalette.size() * sizeof(game::Color));
 
+    data << m_Header.m_World->getBackgroundColor();
+
     const game::Spawn& redSpawn = m_Header.m_World->getRedTeam().getSpawn(), blueSpawn = m_Header.m_World->getBlueTeam().getSpawn();
     const game::TeamCastle& redCastle = m_Header.m_World->getRedTeam().getCastle(), blueCastle = m_Header.m_World->getBlueTeam().getCastle();
 
-    data << redSpawn << redCastle;
-    data << blueSpawn << blueCastle;
+    data << redSpawn << static_cast<utils::shape::Rectangle>(redCastle);
+    data << blueSpawn << static_cast<utils::shape::Rectangle>(blueCastle);
 
     // tile palette
-    data << m_Header.m_World->getTilePalette().size();
+    data << static_cast<std::uint64_t>(m_Header.m_World->getTilePalette().size());
 
     for (game::TilePtr tile : m_Header.m_World->getTilePalette()) {
         data << tile;
@@ -155,8 +159,15 @@ void WorldBeginDataPacket::Deserialize(DataBuffer& data) {
 
     data.SetReadOffset(data.GetReadOffset() + decoPalletteSizeByte);
 
-    data >> m_Header.m_RedSpawn >> m_Header.m_RedCastle;
-    data >> m_Header.m_BlueSpawn >> m_Header.m_BlueCastle;
+    data >> m_Header.m_Background;
+
+    utils::shape::Rectangle redCastle, blueCastle;
+
+    data >> m_Header.m_RedSpawn >> redCastle;
+    data >> m_Header.m_BlueSpawn >> blueCastle;
+
+    m_Header.m_RedCastle.setShape(redCastle);
+    m_Header.m_BlueCastle.setShape(blueCastle);
 
     std::uint64_t tilePaletteSize;
     data >> tilePaletteSize;
@@ -485,13 +496,13 @@ void WorldAddTowerPacket::Deserialize(DataBuffer& data) {
     data >> m_TowerID >> m_TowerX >> m_TowerY >> m_TowerType >> m_Builder;
 }
 
-DataBuffer WorldRemoveTowerPacket::Serialize() const {
+DataBuffer RemoveTowerPacket::Serialize() const {
     DataBuffer data;
     data << getID() << m_TowerID;
     return data;
 }
 
-void WorldRemoveTowerPacket::Deserialize(DataBuffer& data) {
+void RemoveTowerPacket::Deserialize(DataBuffer& data) {
     data >> m_TowerID;
 }
 
@@ -524,6 +535,34 @@ void UpgradeTowerPacket::Deserialize(DataBuffer& data) {
     data >> m_TowerID >> m_TowerLevel;
 }
 
+DataBuffer UpdateCastleLifePacket::Serialize() const {
+    DataBuffer data;
+    data << getID() << m_CastleLife << m_Team;
+    return data;
+}
+
+void UpdateCastleLifePacket::Deserialize(DataBuffer& data) {
+    data >> m_CastleLife >> m_Team;
+}
+
+DataBuffer UpdateMobStatesPacket::Serialize() const {
+    DataBuffer data;
+    data << getID() << static_cast<std::uint64_t>(m_MobStates.size());
+    for (auto mobState : m_MobStates) {
+        data << mobState;
+    }
+    return data;
+}
+
+void UpdateMobStatesPacket::Deserialize(DataBuffer& data) {
+    std::uint64_t mobCount;
+    data >> mobCount;
+    m_MobStates.resize(mobCount);
+    for (std::uint64_t mobIndex = 0; mobIndex < mobCount; mobIndex++) {
+        data >> m_MobStates[mobIndex];
+    }
+}
+
 REGISTER_DISPATCH_CLASS(PlayerLoginPacket);
 REGISTER_DISPATCH_CLASS(WorldBeginDataPacket);
 REGISTER_DISPATCH_CLASS(WorldDataPacket);
@@ -543,9 +582,11 @@ REGISTER_DISPATCH_CLASS(ServerTpsPacket);
 REGISTER_DISPATCH_CLASS(SpawnMobPacket);
 REGISTER_DISPATCH_CLASS(PlaceTowerPacket);
 REGISTER_DISPATCH_CLASS(WorldAddTowerPacket);
-REGISTER_DISPATCH_CLASS(WorldRemoveTowerPacket);
+REGISTER_DISPATCH_CLASS(RemoveTowerPacket);
 REGISTER_DISPATCH_CLASS(SendMobsPacket);
 REGISTER_DISPATCH_CLASS(UpgradeTowerPacket);
+REGISTER_DISPATCH_CLASS(UpdateCastleLifePacket);
+REGISTER_DISPATCH_CLASS(UpdateMobStatesPacket);
 
 } // namespace protocol
 } // namespace td

src/render/Renderer.cpp

@@ -17,7 +17,7 @@
 namespace td {
 namespace render {
 
-Renderer::Renderer() {
+Renderer::Renderer() : m_BackgroundColor(0, 0, 0) {
 
 }
 
@@ -86,7 +86,7 @@ void Renderer::updateIsometricFade() {
 
 void Renderer::prepare() {
     glClear(GL_COLOR_BUFFER_BIT);
-    glClearColor(0, 0, 0, 0);
+    glClearColor(m_BackgroundColor.r, m_BackgroundColor.g, m_BackgroundColor.b, 0);
     updateIsometricFade();
 }
 

src/render/VertexCache.cpp

@@ -5,46 +5,43 @@ namespace td {
 namespace render {
 
 void VertexCache::addData(std::uint64_t index, std::vector<float> positions, std::vector<float> colors) {
-    ElementsIndex positionsIndexes;
-    positionsIndexes.first = m_Positions.end();
-    m_Positions.insert(m_Positions.end(), positions.begin(), positions.end());
-    positionsIndexes.second = m_Positions.end() - 1;
-
-    ElementsIndex colorsIndexes;
-    colorsIndexes.first = m_Colors.end();
-    m_Colors.insert(m_Colors.end(), colors.begin(), colors.end());
-    colorsIndexes.second = m_Colors.end() - 1;
-
-    m_Indexes.insert({ index, {positionsIndexes, colorsIndexes} });
+    m_Indexes.insert({ index, {positions, colors} });
+    m_VertexCount += colors.size(); // one color per vertex
 }
 
 void VertexCache::removeData(std::uint64_t index) {
     auto it = m_Indexes.find(index);
     if (it != m_Indexes.end()) {
-        DataIndex indexes = it->second;
-        ElementsIndex positionsIndexes = indexes.first;
-        ElementsIndex colorsIndexes = indexes.second;
-
-        m_Positions.erase(positionsIndexes.first, positionsIndexes.second);
-        m_Colors.erase(colorsIndexes.first, colorsIndexes.second);
-
         m_Indexes.erase(it);
+        m_VertexCount -= it->second.color.size(); // one color per vertex
     }
 }
 
 void VertexCache::clear() {
-    m_Positions.clear();
-    m_Colors.clear();
     m_Indexes.clear();
+    m_VertexCount = 0;
 }
 
 void VertexCache::updateVertexArray() {
-    m_VertexArray = std::make_unique<GL::VertexArray>(m_Colors.size()); // one color per vertex
+    m_VertexArray = std::make_unique<GL::VertexArray>(m_VertexCount); // one color per vertex
 
-    GL::VertexBuffer positionsBuffer(m_Positions, 2);
+    Vector positions;
+    positions.reserve(m_VertexCount * 2);
+
+    Vector colors;
+    colors.reserve(m_VertexCount);
+
+    for (auto it = m_Indexes.begin(); it != m_Indexes.end(); it++) {
+        const DataIndex& data = it->second;
+
+        positions.insert(positions.end(), data.position.begin(), data.position.end());
+        colors.insert(colors.end(), data.color.begin(), data.color.end());
+    }
+
+    GL::VertexBuffer positionsBuffer(positions, 2);
     positionsBuffer.addVertexAttribPointer(0, 2, 0);
 
-    GL::VertexBuffer colorsBuffer(m_Colors, 1);
+    GL::VertexBuffer colorsBuffer(colors, 1);
     colorsBuffer.addVertexAttribPointer(1, 1, 0);
 
     m_VertexArray->bind();

src/render/WorldRenderer.cpp

@@ -37,6 +37,8 @@ WorldRenderer::WorldRenderer(game::World* world, client::ClientGame* client) : m
     m_Renderer->setCamMovement({});
     m_TowerPlacePopup = std::make_unique<gui::TowerPlacePopup>(m_Client->getClient());
     m_MobTooltip = std::make_unique<gui::MobTooltip>(m_Client->getClient());
+    m_CastleTooltip = std::make_unique<gui::CastleTooltip>(m_Client->getClient());
+    m_Client->getWorldClient().getWorldNotifier().bindListener(this);
 }
 
 void WorldRenderer::updateCursorPos() {
@@ -64,6 +66,18 @@ void WorldRenderer::update() {
             m_PopupOpened = false;
         }
     }
+
+    if (ImGui::IsMouseDoubleClicked(1)) removeTower();
+}
+
+void WorldRenderer::removeTower() {
+    glm::vec2 cursorPos = getCursorWorldPos();
+
+    game::TowerPtr clickedTower = m_World->getTower(cursorPos);
+
+    if (clickedTower != nullptr) {
+        m_Client->getClient()->removeTower(clickedTower->getID());
+    }
 }
 
 void WorldRenderer::renderWorld() const {
@@ -87,6 +101,8 @@ void WorldRenderer::renderTowers() const {
 void WorldRenderer::renderTileSelect() const {
     if (ImGui::IsAnyItemHovered()) return;
 
+    if(m_MobTooltip->isShown() || m_CastleTooltip->isShown()) return;
+
     Renderer::Model tileSelectModel;
     tileSelectModel.vao = m_SelectTileVao.get();
     tileSelectModel.positon = { (int)m_CursorPos.x, (int)m_CursorPos.y };
@@ -106,7 +122,7 @@ void WorldRenderer::render() {
     renderMobs();
     renderTowers();
     renderTileSelect();
-    renderMobTooltip();
+    renderTooltips();
     renderPopups();
     detectClick();
 }
@@ -115,6 +131,11 @@ WorldRenderer::~WorldRenderer() {
 
 }
 
+void WorldRenderer::renderTooltips() const {
+    renderMobTooltip();
+    renderCastleTooltip();
+}
+
 void WorldRenderer::moveCam(float relativeX, float relativeY, float aspectRatio) {
     if (m_WorldVao == nullptr)
         return;
@@ -232,10 +253,17 @@ void WorldRenderer::renderMobTooltip() const {
     m_MobTooltip->render();
 }
 
+void WorldRenderer::renderCastleTooltip() const {
+    if (ImGui::IsAnyItemHovered()) return;
+
+    detectCastleHovering();
+    m_CastleTooltip->render();
+}
+
 void WorldRenderer::detectMobHovering() const {
     glm::vec2 cursorWorldPos = getCursorWorldPos();
     for (game::MobPtr mob : m_World->getMobList()) {
-        if(mob->collidesWith({cursorWorldPos.x, cursorWorldPos.y})){
+        if (mob->collidesWith({ cursorWorldPos.x, cursorWorldPos.y })) {
             m_MobTooltip->setMob(mob.get());
             return;
         }
@@ -243,13 +271,24 @@ void WorldRenderer::detectMobHovering() const {
     m_MobTooltip->setMob(nullptr);
 }
 
-void WorldRenderer::addTower(game::TowerPtr tower) {
-    const WorldLoader::RenderData& renderData = WorldLoader::loadTowerModel(tower);
+void WorldRenderer::detectCastleHovering() const {
+    glm::vec2 cursorWorldPos = getCursorWorldPos();
+    for (const game::Team& team : m_World->getTeams()) {
+        if (team.getCastle().collidesWith({ cursorWorldPos.x, cursorWorldPos.y })) {
+            m_CastleTooltip->setCastle(&team.getCastle());
+            return;
+        }
+    }
+    m_CastleTooltip->setCastle(nullptr);
+}
+
+void WorldRenderer::OnTowerAdd(game::TowerPtr tower) {
+    WorldLoader::RenderData renderData = WorldLoader::loadTowerModel(tower);
     m_TowersCache.addData(tower->getID(), renderData.positions, renderData.colors);
     m_TowersCache.updateVertexArray();
 }
 
-void WorldRenderer::removeTower(game::TowerPtr tower) {
+void WorldRenderer::OnTowerRemove(game::TowerPtr tower) {
     m_TowersCache.removeData(tower->getID());
     m_TowersCache.updateVertexArray();
 }

src/render/gui/CastleTooltip.cpp

@@ -0,0 +1,27 @@
+#include "render/gui/CastleTooltip.h"
+#include "render/gui/imgui/imgui.h"
+
+#include "render/WorldRenderer.h"
+
+#include "game/client/Client.h"
+
+namespace td {
+namespace gui {
+
+CastleTooltip::CastleTooltip(client::Client* client) : GuiWidget(client) {
+
+}
+
+void CastleTooltip::render() {
+    if (m_Castle == nullptr) return;
+
+    ImGui::BeginTooltip();
+    ImGui::PushStyleColor(ImGuiCol_Text, render::WorldRenderer::getImGuiTeamColor(m_Castle->getTeam()->getColor()));
+    ImGui::Text("Castle : ");
+    ImGui::PopStyleColor();
+    ImGui::Text("\tCastle HP : %i/%i", static_cast<int>(m_Castle->getLife()), game::TeamCastle::CastleMaxLife);
+    ImGui::EndTooltip();
+}
+
+} // namespace gui
+} // namespace td

src/render/gui/GameMenu.cpp

@@ -14,6 +14,8 @@ GameMenu::GameMenu(client::Client* client) : GuiWidget(client), m_SummonMenu(std
 }
 
 void GameMenu::render() {
+    if(!m_Client->isConnected()) return;
+
     if (getClient()->getGame().getGameState() == td::game::GameState::Lobby) {
         ImGui::Begin("Lobby");
 

src/render/gui/MainMenu.cpp

@@ -18,6 +18,12 @@ MainMenu::~MainMenu() {
 }
 
 void MainMenu::render() {
+    if (m_Server != nullptr && !m_Server->isRunning()) {
+        m_Server.reset(0); // destroying server if it stoped
+    }
+
+    if(m_Client->isConnected()) return;
+
     ImGui::Begin("Main Menu");
     if (ImGui::Button("Rejoindre une partie##join")) {
         ImGui::OpenPopup("Rejoindre une partie##join_popup");

src/render/gui/MobTooltip.cpp

@@ -17,12 +17,14 @@ MobTooltip::MobTooltip(client::Client* client) : GuiWidget(client) {
 void MobTooltip::render() {
     if (m_Mob == nullptr) return;
 
-    const game::Player& sender = getClient()->getGame().getPlayerById(m_Mob->getSender());
+    // TODO: add sender null check
+
+    const game::Player* sender = getClient()->getGame().getPlayerById(m_Mob->getSender());
     ImGui::BeginTooltip();
     ImGui::Text("Sender :");
     ImGui::SameLine();
-    ImGui::PushStyleColor(ImGuiCol_Text, render::WorldRenderer::getImGuiTeamColor(sender.getTeamColor()));
-    ImGui::Text("%s", sender.getName().c_str());
+    ImGui::PushStyleColor(ImGuiCol_Text, render::WorldRenderer::getImGuiTeamColor(sender->getTeamColor()));
+    ImGui::Text("%s", sender->getName().c_str());
     ImGui::PopStyleColor();
     ImGui::Text("Mob HP : %.1f/%i", m_Mob->getHealth(), m_Mob->getStats()->getMaxLife());
     ImGui::Text("Mob Type : %s", game::MobFactory::getMobName(m_Mob->getType()).c_str());

src/render/gui/TowerGui.cpp

@@ -22,10 +22,10 @@ namespace td {
 namespace render {
 
 void TowerGui::initWidgets() {
-    m_MainMenu = std::make_unique<td::gui::MainMenu>(m_Client.get());
-    m_GameMenu = std::make_unique<td::gui::GameMenu>(m_Client.get());
-    m_FrameMenu = std::make_unique<td::gui::FrameMenu>(m_Client.get());
-    m_UpdateMenu = std::make_unique<td::gui::UpdateMenu>(m_Client.get());
+    m_GuiManager.addWidget(std::make_unique<td::gui::MainMenu>(m_Client.get()));
+    m_GuiManager.addWidget(std::make_unique<td::gui::GameMenu>(m_Client.get()));
+    m_GuiManager.addWidget(std::make_unique<td::gui::FrameMenu>(m_Client.get()));
+    m_GuiManager.addWidget(std::make_unique<td::gui::UpdateMenu>(m_Client.get()));
 }
 
 TowerGui::TowerGui(SDL_Window* sdl_window, SDL_GLContext glContext, td::render::Renderer* renderer) : m_Window(sdl_window),
@@ -69,13 +69,8 @@ void TowerGui::render() {
     beginFrame();
 
     m_Client->render();
-    if (m_Client->isConnected())
-        m_GameMenu->render();
-    else
-        m_MainMenu->render();
 
-    m_FrameMenu->render();
-    m_UpdateMenu->render();
+    m_GuiManager.renderWidgets();
 
     endFrame();
 }

src/render/shaders/EntityShader.cpp

@@ -1,10 +1,3 @@
-/*
- * EntityShader.cpp
- *
- *  Created on: 4 nov. 2020
- *      Author: simon
- */
-
 #include "render/shaders/EntityShader.h"
 
 #ifdef __ANDROID__

src/updater/Updater.cpp

@@ -1,4 +1,5 @@
-#include "misc/Updater.h"
+#include "updater/Updater.h"
+
 #include "misc/Platform.h"
 #include "misc/DataBuffer.h"
 

xmake.lua

@@ -35,6 +35,12 @@ target("TowerDefense")
         end
 
     else
+        if is_os("linux") then
+            add_links("dw")
+        end
+        if is_os("windows") then
+            add_links("dbghelp", "psapi", "kernel32", "msvcr90")
+        end
         add_cxflags("-pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wswitch-default -Wundef -Wno-unused")
     end