std::tr1::bind

gistfile1.c++

#include <algorithm>
#include <tr1/functional>
#include <vector>
	
struct Contact
{
    Vec3 Position;
    // ...
};

typedef std::vector<Contact> ContactContainer;
ContactContainer contacts;

#define TOLERANCE 0.01f
struct SameContacts : public std::binary_function<const Contact&, const Contact&, bool>
{
    bool operator()( const Contact& c0, const Contact& c1 ) const
    {
        // [Tentative] 位置が近いなら同じ衝突点とみなす
        return (c0.Position - c1.Position).Length() <= TOLERANCE ? true : false;
    }
};

// ...

Contact c;
if ( DetectCollision( pRigidBody0, pRigidBody1, &c ) > 0 )
{
    // 似た衝突点が既存の配列内に見つからないなら追加
    ContactContainer::iterator it = std::find_if( contacts.begin(), contacts.end(), 
        std::tr1::bind(SameContacts(), c, std::tr1::placeholders::_1) );
    if ( it == contacts.end() )
        contacts.push_back( c );
}

// ...