Access violation with std::vector

[s_k]

Ok Paul, here it is:

class CGlobalStorage  
{
public:
	CGlobalStorage();
	virtual ~CGlobalStorage();

	...	
	std::vector<myPoint> points;
	std::vector<myPoint> hull;	
};

CGlobalStorage gs;

int main(int argc, char* argv[])
{
	// This just fills gs.points with some random points
	CGeomUtils::generateRandomPoints(1000, gs.points, maxX, maxY);
	
	CHull::computeHull(gs.points, gs.hull);
}

typedef struct _myPoint
{
	int x;
	int y;

	_myPoint() : x(0), y(0) {}
	_myPoint(int _x, int _y) : x(_x), y(_y) {}
	_myPoint(const _myPoint & aP) : x(aP.x), y(aP.y) {}
} myPoint;

void CGeomUtils::sortByAngleRelativeTo(const myPoint & relativeTo, std::vector<myPoint>::iterator start,  std::vector<myPoint>::iterator end)
{
	CGeomUtils::relativePoint = relativeTo;

	std::sort(start, end, CGeomUtils::sortByAngleRelativeTo_callback);
}

bool CGeomUtils::sortByAngleRelativeTo_callback(myPoint a, myPoint b)
{
	double angle1 = CGeomUtils::getAngleRelative(CGeomUtils::relativePoint, a);
	double angle2 = CGeomUtils::getAngleRelative(CGeomUtils::relativePoint, b);

	if (CGeomUtils::IS_EQUIV(angle1, angle2))
		return false;

	if (angle1 < angle2)
		return true;

	return false;
}