/// <summary>
/// Starts the elevation.
/// </summary>
/// <param name="gesture">The current gesture.</param>
protected override void OnStartManipulation(TwoFingerDragGesture gesture)
{
m_Origin = transform.localPosition;
m_Origin.y = transform.InverseTransformPoint(transform.parent.position).y;
m_Origin = transform.TransformPoint(m_Origin);
OnStartElevationVisualization(m_Origin, transform.position);
}
/// <summary>
/// Continues the elevation.
/// </summary>
/// <param name="gesture">The current gesture.</param>
protected override void OnContinueManipulation(TwoFingerDragGesture gesture)
{
float elevationScale = 0.25f;
Quaternion cameraRotation = Camera.main.transform.rotation;
Vector3 rotatedDelta = cameraRotation * gesture.Delta;
float elevationAmount = (rotatedDelta.y / Screen.dpi) * elevationScale;
transform.Translate(0.0f, elevationAmount, 0.0f);
// We cannot move it below the original position.
if (transform.localPosition.y < transform.parent.InverseTransformPoint(m_Origin).y)
{
transform.position = transform.parent.TransformPoint(
new Vector3(
transform.localPosition.x,
transform.parent.InverseTransformPoint(m_Origin).y,
transform.localPosition.z));
}
GetComponent <SelectionManipulator>().OnElevationChangedScaled(
Mathf.Abs(transform.position.y - m_Origin.y));
OnContinueElevationVisualization(transform.position);
}
private void OnGestureStarted(TwoFingerDragGesture gesture)
{
if (m_IsManipulating)
{
return;
}
if (CanStartManipulationForGesture(gesture))
{
m_IsManipulating = true;
gesture.onUpdated += OnUpdated;
gesture.onFinished += OnFinished;
OnStartManipulation(gesture);
}
}
private void OnUpdated(TwoFingerDragGesture 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 transformation can be started for the given gesture.
/// </summary>
/// <param name="gesture">The current gesture.</param>
/// <returns>True if the transformation can be started.</returns>
protected override bool CanStartManipulationForGesture(TwoFingerDragGesture gesture)
{
if (!IsSelected())
{
return(false);
}
if (gesture.TargetObject != null)
{
return(false);
}
if (transform.parent.up != Vector3.up && transform.parent.up != Vector3.down)
{
// Don't allow elevation on vertical planes.
return(false);
}
return(true);
}
/// <summary>
/// Finishes the elevation.
/// </summary>
/// <param name="gesture">The current gesture.</param>
protected override void OnEndManipulation(TwoFingerDragGesture gesture)
{
OnEndElevationVisualization();
}
private void OnFinished(TwoFingerDragGesture 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(TwoFingerDragGesture gesture)
{
// Optional override.
}
/// <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(TwoFingerDragGesture gesture)
{
return(false);
}