public override bool Update(GameTime gameTime, TouchCollection currentTouch, out TouchStateBase nextState)
{
if (currentTouch.Count != 2)
{
TouchStateMachine.SubmitGestureEvent(new TwoFingeredDragEventArgs(GestureTiming.Completed, new Vector2()));
nextState = new CooldownState();
return(true);
}
if (currentTouch[0].TryGetPreviousLocation(out var prevFinger1) &&
currentTouch[1].TryGetPreviousLocation(out var prevFinger2))
{
nextState = null;
if (!Vector2.Normalize(prevFinger1.Position - currentTouch[0].Position)
.MovingInSameDirection(Vector2.Normalize(prevFinger2.Position - currentTouch[1].Position)))
{
TouchStateMachine.SubmitGestureEvent(new TwoFingeredDragEventArgs(GestureTiming.Completed, new Vector2()));
nextState = new RotateAndScaleState();
return(true);
}
}
var midpoint = Vector2.Lerp(currentTouch[0].Position, currentTouch[1].Position, 0);
TouchStateMachine.SubmitGestureEvent(new TwoFingeredDragEventArgs(GestureTiming.InProgress, midpoint));
nextState = null;
return(false);
}
public override bool Update(GameTime gameTime, TouchCollection currentTouch, out TouchStateBase nextState)
{
switch (currentTouch.Count)
{
case 1:
nextState = new DragState();
TouchStateMachine.SubmitGestureEvent(new DragEventArgs(GestureTiming.Started, currentTouch[0].Position));
return(true);
case 2:
TouchStateMachine.SubmitGestureEvent(new RotateAndScaleEventArgs(GestureTiming.Started, 0, 0));
nextState = new RotateAndScaleState();
return(true);
default:
// bail because no gesture is active anymore
nextState = new WaitingState();
return(true);
}
}
