/// <summary>
/// Helper function for creating one finger gestures when a touch begins.
/// </summary>
/// <typeparam name="createGestureFunction">Function to be executed to create the
/// gesture.</param>
protected internal void TryCreateOneFingerGestureOnTouchBegan(
Func <Touch, T> createGestureFunction)
{
for (int i = 0; i < Input.touches.Length; i++)
{
Touch touch = Input.touches[i];
if (touch.phase == TouchPhase.Began &&
!GestureTouchesUtility.IsFingerIdRetained(touch.fingerId) &&
!GestureTouchesUtility.IsTouchOffScreenEdge(touch))
{
T gesture = createGestureFunction(touch);
gesture.onStart += OnStart;
gesture.onFinished += OnFinished;
m_Gestures.Add(gesture);
}
}
}
private void TryCreateGestureTwoFingerGestureOnTouchBeganForTouchIndex(
int touchIndex,
Func <Touch, Touch, T> createGestureFunction)
{
if (Input.touches[touchIndex].phase != TouchPhase.Began)
{
return;
}
Touch touch = Input.touches[touchIndex];
if (GestureTouchesUtility.IsFingerIdRetained(touch.fingerId) ||
GestureTouchesUtility.IsTouchOffScreenEdge(touch))
{
return;
}
for (int i = 0; i < Input.touches.Length; i++)
{
if (i == touchIndex)
{
continue;
}
// Prevents the same two touches from creating two gestures if both touches began on
// the same frame.
if (i < touchIndex && Input.touches[i].phase == TouchPhase.Began)
{
continue;
}
Touch otherTouch = Input.touches[i];
if (GestureTouchesUtility.IsFingerIdRetained(otherTouch.fingerId) ||
GestureTouchesUtility.IsTouchOffScreenEdge(otherTouch))
{
continue;
}
T gesture = createGestureFunction(touch, otherTouch);
gesture.onStart += OnStart;
gesture.onFinished += OnFinished;
m_Gestures.Add(gesture);
}
}