Thread: Cannot convert parameter 1 from......

Why can I not dereference this MyPolygon pointer?? It is declared here:

Code:

class Breakout
{
public:
	Breakout( );
	~Breakout( );
	Ball* getBall( ) { return &ball; }

	void run( );
	void testCollisions( );


//data members
private:

	Ball ball;
	FrameRate fRate;
	MyPolygon* boundaries[ 4 ];

	void defineBoundaries( );

};

but when I try to dereference it here:

Code:

void Breakout::testCollisions( )
{
	//need to test for intersection wiht boundaries[ 0 ], the top polygon
	if( intersectPolygon( *boundaries[ 0 ], *ball.getDirection( ), 4 ) )
		cout << "HIT" << endl;
}

I get this error - error C2665: 'intersectPolygon' : none of the 2 overloads can convert parameter 1 from type 'class MyPolygon'

I've never seen this error before, it normally tells me what I am supposed to be converting it to - but it doesnt

Oh and here is theintersectPolygon() prototype if its any use:

bool intersectPolygon( MyPolygon poly, Vector3d* line );


thx in advance