diff -r f1006de05c54 -r 7d67be709091 geometry.h
--- a/geometry.h	Mon Sep 07 15:36:57 2009 +0000
+++ b/geometry.h	Tue Sep 08 12:15:39 2009 +0000
@@ -6,6 +6,23 @@
 QRectF addBBox(QRectF r1, QRectF r2);
 bool isInBox(const QPointF &p, const QRectF &box);
 
+
+class Vector:public QPointF
+{
+public:
+	Vector ();
+	Vector (const QPointF &p);
+	Vector (qreal x, qreal y);
+
+	friend inline bool operator==(const Vector &v1, const Vector &v2 )
+	{ return v1.x()==v2.x() && v1.y()==v2.y(); }
+
+	virtual void normalize ();
+	virtual qreal dotProduct (const QPointF &b);
+	virtual void scale  (const qreal &f);
+	virtual void invert ();
+};
+
 class ConvexPolygon:public QPolygonF
 {
 public:
@@ -14,19 +31,15 @@
 	void calcCentroid() ;
 	QPointF centroid() const;
 	qreal weight() const;
+	std::string toStdString ();
+	Vector at (const int &i) const ; 
+	virtual void translate ( const Vector &offset );
+	virtual void translate ( qreal dx, qreal dy );
 private:
-	QPointF _centroid;
+	Vector _centroid;
 	qreal _area;
 };
 
-QPointF normalize (const QPointF &p);
-
-
-qreal dotProduct (const QPointF &a, const QPointF &b);
-
-QPointF scale  (const QPointF &v,const qreal &f);
-QPointF invert (const QPointF &v);
-
 class PolygonCollisionResult {
 public:
     // Are the polygons going to intersect forward in time?
@@ -40,10 +53,10 @@
 };
 
 
-void projectPolygon(QPointF axis, QPolygonF polygon, qreal &min, qreal &max) ;
+void projectPolygon(Vector axis, ConvexPolygon polygon, qreal &min, qreal &max) ;
 
 qreal intervalDistance(qreal minA, qreal maxA, qreal minB, qreal maxB);
-PolygonCollisionResult polygonCollision(QPolygonF polygonA, 
-                              QPolygonF polygonB, QPointF velocity);
+PolygonCollisionResult polygonCollision(ConvexPolygon polygonA, 
+                              ConvexPolygon polygonB, Vector velocity);
 
 #endif
\ No newline at end of file