1 class Superpower
 2 {
 3 
 4 public:
 5   virtual ~Superpower() {}
 6  
 7 protected:
 8   virtual void activate() = 0;
 9  
10   double getHeroX()
11   {
12     // Code here...
13   }
14 
15   double getHeroY()
16   {
17     // Code here...
18   }
19 
20   double getHeroZ()
21   {
22     // Code here...
23   }
24  
25   void move(double x, double y, double z)
26   {
27     // Code here...
28   } 
29 
30   void playSound(SoundId sound, double volume)
31   {
32     // Code here...
33   } 
34 
35   void spawnParticles(ParticleType type, int count)
36   {
37     // Code here...
38   }
39 
40 };

 1 class SkyLaunch : public Superpower
 2 {
 3 
 4 protected:
 5   virtual void activate()
 6   {
 7     if (getHeroZ() == 0)
 8     {
 9       // On the ground, so spring into the air.
10       playSound(SOUND_SPROING, 1.0f);
11       spawnParticles(PARTICLE_DUST, 10);
12       move(0, 0, 20);
13     }
14     else if (getHeroZ() < 10.0f)
15     {
16       // Near the ground, so do a double jump.
17       playSound(SOUND_SWOOP, 1.0f);
18       move(0, 0, getHeroZ() - 20);
19     }
20     else
21     {
22       // Way up in the air, so do a dive attack.
23       playSound(SOUND_DIVE, 0.7f);
24       spawnParticles(PARTICLE_SPARKLES, 1);
25       move(0, 0, -getHeroZ());
26     }
27   }
28 
29 };

 1 class SoundPlayer
 2 {
 3   void playSound(SoundId sound, double volume)
 4   {
 5     // Code here...
 6   }
 7  
 8   void stopSound(SoundId sound)
 9   {
10     // Code here...
11   } 
12 
13   void setVolume(SoundId sound)
14   {
15     // Code here...
16   }
17 };
18 
19 class Superpower
20 {
21 
22 protected:
23   SoundPlayer& getSoundPlayer()
24   {
25     return soundPlayer_;
26   } 
27 
28   // Sandbox method and other operations...
29  
30 private:
31   SoundPlayer soundPlayer_;
32 
33 };

1 Superpower* createSkyLaunch(ParticleSystem* particles)
2 {
3   Superpower* power = new SkyLaunch();
4   power->init(particles);
5   return power;
6 }

 1 class Superpower
 2 {
 3 
 4 public:
 5   static void init(ParticleSystem* particles)
 6   {
 7     particles_ = particles;
 8   } 
 9 
10   // Sandbox method and other operations...
11  
12 private:
13   static ParticleSystem* particles_;
14 
15 };

 1 class Breed
 2 {
 3 
 4 public:
 5   Breed(int health, const char* attack)
 6   : health_(health),
 7     attack_(attack)
 8   {}
 9 
10   Monster* newMonster() { return new Monster(*this); } 
11 
12   int getHealth() { return health_; }
13   const char* getAttack() { return attack_; } 
14 
15 private:
16   int health_; // Starting health.
17   const char* attack_;
18 
19 };

 1 class Monster
 2 {
 3   friend class Breed; 
 4 
 5 public:
 6   const char* getAttack() { return breed_.getAttack(); }
 7  
 8 private:
 9   Monster(Breed& breed)
10   : health_(breed.getHealth()),
11     breed_(breed)
12   {}
13  
14   int health_; // Current health.
15   Breed& breed_;
16 
17 };

1 Monster* monster = someBreed.newMonster();