Was wären das für Fälle?

class Primitive
{ ... };

class Sphere : public Primitive
{ ...  };

class Plane : public Primitive
{ ... };

class Blubb
{
    public:
        Blubb()
        {
            m_prims.push_back( new Sphere(...) );
            m_prims.push_back( new Plane( ... ) );
        }

        void doSomething()
        {
            for ( std::vector<Primitive*>::const_iterator primIter=m_prims.begin(); primIter!=m_prims.end(); primIter++ )
                (*primIter)->foo();
        }

        ~Blubb()
        {
            for ( std::vector<Primitive*>::const_iterator primIter=m_prims.begin(); primIter!=m_prims.end(); primIter++ )
                delete *primIter;
        }

    private:
        std::vector<Primitive*> m_prims;
};