#import "Box2D.h"
#import <vector>
#import <algorithm>

struct MyContact
{
    b2Fixture *fixtureA;
    b2Fixture *fixtureB;
    bool operator==(const MyContact& other) const
    {
        return (fixtureA == other.fixtureA) && (fixtureB == other.fixtureB);
    }
};



class MyContactListener : public b2ContactListener
{

public:
    std::vector<MyContact>_contacts;

    MyContactListener();
    ~MyContactListener();

    virtual void BeginContact(b2Contact* contact);
    virtual void EndContact(b2Contact* contact);
    virtual void PreSolve(b2Contact* contact, const b2Manifold* oldManifold);
    virtual void PostSolve(b2Contact* contact, const b2ContactImpulse* impulse);

};


///////////////////////////////




#import "MyContactListener.h"

MyContactListener::MyContactListener() : _contacts()
{

}

MyContactListener::~MyContactListener()
{

}

void MyContactListener::BeginContact(b2Contact* contact)
{
    // We need to copy out the data because the b2Contact passed in
    // is reused.
    MyContact myContact = { contact->GetFixtureA(), contact->GetFixtureB() };
    _contacts.push_back(myContact);

}

void MYContactListener::EndContact(b2Contact* contact)
{
    MyContact myContact = { contact->GetFixtureA(), contact->GetFixtureB() };



    std::vector<MyContact>::iterator pos;
    pos = std::find(_contacts.begin(), _contacts.end(), myContact);

    if (pos != _contacts.end())
    {
        _contacts.erase(pos);
    }
}

void MyContactListener::PreSolve(b2Contact* contact, const b2Manifold* oldManifold)
{

}

void MyContactListener::PostSolve(b2Contact* contact, const b2ContactImpulse* impulse)
{

}