public void Update()
{
if (!Enabled)
{
return;
}
//Check touches if they are still active
if (_myTouch1 != null)
{
if (_myTouch1.IsRelased())
{
LooseTouch1();
}
}
if (_myTouch2 != null)
{
if (_myTouch2.IsRelased())
{
LooseTouch2();
}
}
//If second touch is active but first is not, then lets move second to first
if (_myTouch2 != null && _myTouch1 == null)
{
_myTouch1 = _myTouch2;
_myTouch2 = null;
}
//Get new touches
if (_myTouch1 == null)
{
if ((_myTouch1 = InputOptions.MyState.GetBrandNewTouch(false)) != null)
{
_firstTouchMoved = false;
_firstTouchPosition = _myTouch1.Position;
_isMyTouch1Mouse = false;
}
else
{
//Try get mouse
if ((_myTouch1 = InputOptions.MyState.GetPressedMouse(true)) != null)
{
_firstTouchMoved = false;
_firstTouchPosition = _myTouch1.Position;
_isMyTouch1Mouse = true;
}
}
}
if (_myTouch2 == null && _myTouch1 != null && !_isMyTouch1Mouse)
{
if ((_myTouch2 = InputOptions.MyState.GetBrandNewTouchBut(_myTouch1)) != null)
{
//Ready for zooming
_zoomTouchesAveragePosition = (_myTouch1.Position + _myTouch2.Position) / 2;
_myTouch1.SetAsOwned();
_firstTouchMoved = true;
}
}
if (_myTouch1 != null)
{
if (_myTouch2 == null)
{
if (!_firstTouchMoved)
{
if (Vector2.Distance(_myTouch1.Position, _firstTouchPosition) > _firstTouchMoveDist)
{
//Start dragging
_firstTouchMoved = true;
HardAdjustFocusPosition(_myTouch1.Position - _firstTouchPosition);
_myTouch1.SetAsOwned();
}
}
else
{
// There is only one touch - dragging!
HardAdjustFocusPosition(_myTouch1.Move);
}
}
else
{
// There are two touches - finger zooming!
#region Fingerzooming!
Vector2 previousDiff = _myTouch1.PreviousTouch.Position - _myTouch2.PreviousTouch.Position;
float previousDist = previousDiff.Length();
Vector2 currDiff = _myTouch1.Position - _myTouch2.Position;
float currDist = currDiff.Length();
FingerZoom *= currDist / previousDist;
if (FingerZoom < CameraOptions.MinZoom)
{
FingerZoom = CameraOptions.MinZoom;
}
if (FingerZoom > CameraOptions.MaxZoom)
{
FingerZoom = CameraOptions.MaxZoom;
}
Vector2 newAveragePosition = (_myTouch1.Position + _myTouch2.Position) / 2;
HardAdjustFocusPosition(newAveragePosition - _zoomTouchesAveragePosition);
_zoomTouchesAveragePosition = newAveragePosition;
#endregion
}
}
}
