/// <inheritdoc />
protected internal override bool CanStart()
{
if (GestureTouchesUtility.IsFingerIdRetained(FingerId1) ||
GestureTouchesUtility.IsFingerIdRetained(FingerId2))
{
Cancel();
return(false);
}
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
// Check that at least one finger is moving.
if (touch1.deltaPosition == Vector2.zero && touch2.deltaPosition == Vector2.zero)
{
return(false);
}
var pos1 = touch1.position;
var diff1 = (pos1 - StartPosition1).magnitude;
var pos2 = touch2.position;
var diff2 = (pos2 - StartPosition2).magnitude;
var slopInches = (m_Recognizer as TwoFingerDragGestureRecognizer).m_SlopInches;
if (GestureTouchesUtility.PixelsToInches(diff1) < slopInches ||
GestureTouchesUtility.PixelsToInches(diff2) < slopInches)
{
return(false);
}
var recognizer = m_Recognizer as TwoFingerDragGestureRecognizer;
// Check both fingers move in the same direction.
var dot = Vector3.Dot(touch1.deltaPosition.normalized, touch2.deltaPosition.normalized);
return(!(dot < Mathf.Cos(recognizer.m_AngleThresholdRadians)));
}
/// <summary>
/// Updates this gesture.
/// </summary>
/// <returns>True if the update was successful.</returns>
protected internal override bool UpdateGesture()
{
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Canceled || touch2.phase == TouchPhase.Canceled)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Ended || touch2.phase == TouchPhase.Ended)
{
Complete();
return(false);
}
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
float rotation = CalculateDeltaRotation(
touch1.position,
touch2.position,
m_PreviousPosition1,
m_PreviousPosition2);
DeltaRotation = rotation;
m_PreviousPosition1 = touch1.position;
m_PreviousPosition2 = touch2.position;
return(true);
}
m_PreviousPosition1 = touch1.position;
m_PreviousPosition2 = touch2.position;
DeltaRotation = 0.0f;
return(false);
}
/// <inheritdoc />
protected internal override void OnStart()
{
GestureTouchesUtility.LockFingerId(fingerId);
if (GestureTouchesUtility.RaycastFromCamera(startPosition, out var hit))
{
var gameObject = hit.transform.gameObject;
if (gameObject != null)
{
var interactableObject = gameObject.GetComponentInParent <ARBaseGestureInteractable>();
if (interactableObject != null)
{
TargetObject = interactableObject.gameObject;
}
}
}
GestureTouchesUtility.TryFindTouch(fingerId, out var touch);
position = touch.position;
}
/// <summary>
/// Returns true if this gesture can start.
/// </summary>
/// <returns>True if the gesture can start.</returns>
protected internal override bool CanStart()
{
if (GestureTouchesUtility.IsFingerIdRetained(FingerId))
{
Cancel();
return(false);
}
if (GestureTouchesUtility.Touches.Length > 1)
{
for (int i = 0; i < GestureTouchesUtility.Touches.Length; i++)
{
Touch currentTouch = GestureTouchesUtility.Touches[i];
if (currentTouch.fingerId != FingerId &&
!GestureTouchesUtility.IsFingerIdRetained(currentTouch.fingerId))
{
return(false);
}
}
}
Touch touch;
if (GestureTouchesUtility.TryFindTouch(FingerId, out touch))
{
Vector2 pos = touch.position;
float diff = (pos - StartPosition).magnitude;
if (GestureTouchesUtility.PixelsToInches(diff) >=
(m_Recognizer as DragGestureRecognizer).m_SlopInches)
{
return(true);
}
}
else
{
Cancel();
}
return(false);
}
/// <summary>
/// Returns true if this gesture can start.
/// </summary>
/// <returns>True if the gesture can start.</returns>
protected internal override bool CanStart()
{
if (GestureTouchesUtility.IsFingerIdRetained(FingerId1) ||
GestureTouchesUtility.IsFingerIdRetained(FingerId2))
{
Cancel();
return(false);
}
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
// Check that both fingers are moving.
if (touch1.deltaPosition == Vector2.zero || touch2.deltaPosition == Vector2.zero)
{
return(false);
}
TwistGestureRecognizer twistRecognizer = m_Recognizer as TwistGestureRecognizer;
float rotation = CalculateDeltaRotation(
touch1.position, touch2.position, StartPosition1, StartPosition2);
if (Mathf.Abs(rotation) < twistRecognizer.m_SlopRotation)
{
return(false);
}
return(true);
}
#pragma warning restore IDE1006
/// <inheritdoc />
protected internal override bool CanStart()
{
if (GestureTouchesUtility.IsFingerIdRetained(fingerId))
{
Cancel();
return(false);
}
var touches = GestureTouchesUtility.touches;
if (touches.Count > 1)
{
foreach (var currentTouch in touches)
{
if (currentTouch.fingerId != fingerId &&
!GestureTouchesUtility.IsFingerIdRetained(currentTouch.fingerId))
{
return(false);
}
}
}
if (GestureTouchesUtility.TryFindTouch(fingerId, out var touch))
{
var pos = touch.position;
var diff = (pos - startPosition).magnitude;
if (GestureTouchesUtility.PixelsToInches(diff) >= dragRecognizer.slopInches)
{
return(true);
}
}
else
{
Cancel();
}
return(false);
}
/// <summary>
/// Updates this gesture.
/// </summary>
/// <returns>True if the update was successful.</returns>
protected internal override bool UpdateGesture()
{
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Canceled || touch2.phase == TouchPhase.Canceled)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Ended || touch2.phase == TouchPhase.Ended)
{
Complete();
return(false);
}
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
float newgap = (touch1.position - touch2.position).magnitude;
GapDelta = newgap - Gap;
Gap = newgap;
return(true);
}
return(false);
}