Question

I have an Entity baseclass which the classes Player and Enemy Inherit. Both player and enemy contain a sprite object (From the SFML api) that looks like this:

class Player : Entity
{
   sf::Sprite sprite
}

Player and Enemy are created inside a vector which is set up like this:

class EntityManager
{
   public:
   void CollisionCheck();
   private:
   std::vector<Entity*> entityVector;
}

I’m looking to use a collision detection function which is of this form:

bool Collision::CircleTest(const sf::Sprite& Object1, const sf::Sprite& Object2)

So I’m trying to do something like this:

void EntityManager::ColCheck()
{
   if (Collision::CircleTest(entityVector[0].sprite, entityVector[1].sprite))
      {
         cout << "COLLISION\n";
      }
}

But I get this compile error:

error: request for member ‘sprite’ in

‘((EntityManager*)this)->EntityManager::entityVector.std::vector<_Tp,
_Alloc>::operator[] with _Tp = Entity*, _Alloc =
std::allocator’, which
is of non-class type ‘Entity*’

How do I pass the sprite object from these classes inside the vector to the collision function?

Answer 1

Since entityVector holds Entity* you’ll need to use the proper syntax: entityVector[0]->sprite instead of entityVector[0].sprite.