/// <summary>
/// Returns true if the manipulation can be started for the given Twist gesture.
/// </summary>
/// <param name="gesture">The current gesture.</param>
/// <returns>True if the manipulation can be started.</returns>
protected override bool CanStartManipulationForGesture(TwistGesture gesture)
{
if (!IsSelected())
{
return(false);
}
if (gesture.TargetObject != null)
{
return(false);
}
return(true);
}
private void OnGestureStarted(TwistGesture gesture)
{
if (m_IsManipulating)
{
return;
}
if (CanStartManipulationForGesture(gesture))
{
m_IsManipulating = true;
gesture.onUpdated += OnUpdated;
gesture.onFinished += OnFinished;
OnStartManipulation(gesture);
}
}
private void OnUpdated(TwistGesture gesture)
{
if (!m_IsManipulating)
{
return;
}
// Can only transform selected Items.
if (ManipulationSystem.Instance.SelectedObject != gameObject)
{
m_IsManipulating = false;
OnEndManipulation(gesture);
return;
}
OnContinueManipulation(gesture);
}
/// <summary>
/// Returns true if the manipulation can be started for the given gesture.
/// </summary>
/// <param name="gesture">The current gesture.</param>
/// <returns>True if the manipulation can be started.</returns>
protected virtual bool CanStartManipulationForGesture(TwistGesture gesture)
{
return(false);
}
private void OnFinished(TwistGesture gesture)
{
m_IsManipulating = false;
OnEndManipulation(gesture);
}
/// <summary>
/// Function called when the manipulation is ended.
/// </summary>
/// <param name="gesture">The current gesture.</param>
protected virtual void OnEndManipulation(TwistGesture gesture)
{
// Optional override.
}
/// <summary>
/// Rotates the object around the y-axis via a Twist gesture.
/// </summary>
/// <param name="gesture">The current twist gesture.</param>
protected override void OnContinueManipulation(TwistGesture gesture)
{
float rotationAmount = -gesture.DeltaRotation * k_RotationRateDegreesTwist;
transform.Rotate(0.0f, rotationAmount, 0.0f);
}
