abilities.hpp

// Ability system

// Generic class for abilities
class Ability {
  public:
    virtual void Update(float dt) = 0;
    virtual void Launch() = 0;
  
    float cooldown = 0.0f;
}

// Ability specialization
class FireAbility {
  public:
    void Update(float dt) {
      if (cooldown > 0.0f)
        cooldown -= dt;
    }
  
    void Launch() {
      if (cooldown <= 0.0f) {
        // do some crazy stuff here
        // ...
        
        // block spell usage for 2s
        cooldown = 2.0f; 
      }
    }
  
    // manage your ability data however you want here
    // ...
}

// Abilities update
class AbilityManager {
  public:
    void Update(float dt) {
      // Update all abilities behaviour
      for (auto it = abilities.begin(); it != abilities.end(); it++)
        it.Update(dt);
    }
  
    void Register(Ability* ability) {
      abilities.push_back(ability);
    }
  
    vector<Ability*> abilities;
}

// For every game object using an ability
// Ability* spell = new FireAbility();
// spell.Launch();
// abilityManager.Register(spell);

// Every frame
// AbilityManager.Update(dt)