CODEWITHSUNDEEP
c++inheritancereflectioncasting
Wilheim
Wilheim

Reputation: 123

C++ calling method of subclass in superclass?

I have an EnemyBullet subclass of superclass Bullet. Now I'm calling the Bullet method Process() using an EnemyBullet object. What I want is to determine whether the current object is an EnemyBullet to distinguish from Bullet action. My code is like this,

void Bullet::Process(float deltaTime)
{
// Generic position update, based upon velocity (and time).
m_y = m_y + this->GetVerticalVelocity()*deltaTime;
m_pSprite->SetY(static_cast<int>(m_y));
m_pSprite->SetX(static_cast<int>(m_x));

  if (m_y < 0)
  {
    SetDead(true);
  }

//Here I want to detect current object is an EnemyBullet, then define a different action
//I tried the following code, but it didn't work
if (EnemyBullet* v = static_cast<EnemyBullet*>(Bullet)) {
     if (m_y >800)
    {
      SetDead(true);
    }
 }
}

Upvotes: 0

Views: 204

Answers (1)

user6697869
user6697869

Reputation:

Here's an example of calling a method on an instance of a subclass from a method in the superclass:

class Bullet {
public:
  void process() {
    // update m_y...

    // update sprite position...

    if (this->isDead()) {
      // handle dead bullet...
    }
  }

  virtual bool isDead() {
    return (m_y < 0);
  }

protected:
  int m_y;
};

class EnemyBullet : public Bullet {
public:
  bool isDead() override {
    return (m_y > 800);
  }
};

Note how each bullet type has custom isDead logic.

Upvotes: 1

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