feat: add archer tower aoe

include/game/World.h

@@ -114,7 +114,19 @@ typedef std::array<Color, 2> SpawnColorPalette;
 
 typedef std::vector<TowerPtr> TowerList;
 
-class World {
+class WorldListener {
+public:
+    WorldListener(){}
+
+    virtual void OnArcherTowerShot(MobPtr target, ArcherTower* shooter){}
+
+    virtual void OnArrowShot(MobPtr target, Tower* shooter){}
+    virtual void OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter){}
+
+    virtual void OnMobDamage(MobPtr target, float damage){}
+};
+
+class World : public WorldListener{
 protected:
     TowerTileColorPalette m_TowerPlacePalette;
     Color m_WalkablePalette;
@@ -189,8 +201,14 @@ public:
     const TowerList& getTowers() const { return m_Towers; };
     TowerPtr getTowerById(TowerID tower);
 
-    // Archer Tower
-    virtual void OnArrowShot(MobPtr target, Tower* shooter);
+    // WorldListener
+
+    virtual void OnArcherTowerShot(MobPtr target, ArcherTower* shooter){}
+
+    virtual void OnArrowShot(MobPtr target, Tower* shooter){}
+    virtual void OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter){}
+
+    virtual void OnMobDamage(MobPtr target, float damage, Tower* source){}
 private:
     void moveMobs(std::uint64_t delta);
     void moveMob(MobPtr mob, std::uint64_t delta);

src/game/Towers.cpp

@@ -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->OnArcherTowerShot(mob, this);
+                m_Timer.applyCooldown();
                 arrowsShot++;
                 if (arrowsShot >= arrows)
                     break;
-                m_Timer.applyCooldown();
             }
         }
     }

src/game/World.cpp

@@ -398,15 +398,34 @@ TowerPtr World::getTowerById(TowerID towerID) {
     return *it;
 }
 
-void World::OnArrowShot(MobPtr target, Tower* shooter) {
+void World::OnArcherTowerShot(MobPtr target, ArcherTower* shooter) {
     bool explosiveArrows = shooter->getLevel().getPath() == TowerPath::Bottom;
     if (explosiveArrows) {
-        // aoe damage
+        OnArrowShot(target, shooter);
+        OnExplosion({ target->getCenterX(), target->getCenterY(), 1.0f }, 10.0f, shooter);
     } else {
-        target->damage(shooter->getStats()->getDamage(), shooter);
+        OnArrowShot(target, shooter);
     }
 }
 
+void World::OnArrowShot(MobPtr target, Tower* shooter) {
+    OnMobDamage(target, shooter->getStats()->getDamage(), shooter);
+}
+
+void World::OnExplosion(utils::shape::Circle explosion, float centerDamage, Tower* shooter) {
+    for (MobPtr mob : m_Mobs) {
+        if (mob->collidesWith(explosion)) {
+            // linear distance damage reduction
+            float explosionDamage = mob->distance(explosion) / explosion.getRadius() * centerDamage;
+            OnMobDamage(mob, explosionDamage, shooter);
+        }
+    }
+}
+
+void World::OnMobDamage(MobPtr target, float damage, Tower* source){
+    target->damage(damage, source);
+}
+
 Team& World::getRedTeam() {
     return m_Game->getRedTeam();
 }