feat: add basic tower mecanic

src/game/Towers.cpp

@@ -6,6 +6,12 @@
 namespace td {
 namespace game {
 
+bool Tower::isMobInRange(MobPtr mob) {
+    if(!mob->isAlive())
+        return false;
+    return (m_X - mob->getX()) * (m_X - mob->getX()) + (m_Y - mob->getY()) * (m_Y - mob->getY()) < (getStats()->getRange() * getStats()->getRange());
+}
+
 const std::map<std::pair<TowerType, TowerLevel>, TowerStats> TowerConstants = {
     //                                    // rate  damage range
     {{TowerType::Archer, {1, TowerPath::Top}}, {2, 5, 10}},
@@ -161,7 +167,28 @@ TowerPtr createTower(TowerType type, TowerID id, std::int32_t x, std::int32_t y,
 
 
 void ArcherTower::tick(std::uint64_t delta, World* world) {
+    if (m_Timer.update(delta)) {
+        std::uint8_t arrowsShot = 0;
+        bool explosiveArrows = getLevel().getPath() == TowerPath::Bottom;
+        std::uint8_t arrows = explosiveArrows ? 2 : getLevel().getLevel();
+        for (MobPtr mob : world->getMobList()) {
+            if (isMobInRange(mob)) {
+                shootArrow(mob);
+                arrowsShot++;
+                if(arrowsShot >= arrows)
+                    break;
+            }
+        }
+    }
+}
 
+void ArcherTower::shootArrow(MobPtr target){
+    bool explosiveArrows = getLevel().getPath() == TowerPath::Bottom;
+    if(explosiveArrows){
+
+    }else{
+        target->damage(getStats()->getDamage());
+    }
 }
 
 void IceTower::tick(std::uint64_t delta, World* world) {

src/game/World.cpp

@@ -322,8 +322,9 @@ bool World::saveMap(const std::string& fileName) const {
 void World::tick(std::uint64_t delta) {
     moveMobs(delta);
     for(TowerPtr tower : m_Towers){
-        tower->tick(delta);
+        tower->tick(delta, this);
     }
+    cleanDeadMobs();
 }
 
 void World::spawnMobAt(MobID id, MobType type, std::uint8_t level, PlayerID sender, float x, float y, Direction dir) {
@@ -447,6 +448,15 @@ bool World::CanPlaceBigTower(const glm::vec2& worldPos, PlayerID playerID) const
     return false;
 }
 
+void World::cleanDeadMobs(){
+    for(auto it = m_Mobs.begin(); it != m_Mobs.end(); it++){
+        MobPtr mob = *it;
+        if(!mob->isAlive()){
+            m_Mobs.erase(it);
+        }
+    }
+}
+
 Team& World::getRedTeam() {
     return m_Game->getRedTeam();
 }