/// <summary>
/// Starts dragging the object.
/// </summary>
public void StartDragging(Vector3 initialDraggingPosition)
{
if (!IsDraggingEnabled)
{
return;
}
if (isDragging)
{
return;
}
// TODO: robertes: Fix push/pop and single-handler model so that multiple HandDraggable components
// can be active at once.
// Add self as a modal input handler, to get all inputs during the manipulation
InputManager.Instance.PushModalInputHandler(gameObject);
isDragging = true;
if (hostRigidbody != null)
{
hostRigidbodyWasKinematic = hostRigidbody.isKinematic;
hostRigidbody.isKinematic = true;
}
Transform cameraTransform = CameraCache.Main.transform;
Vector3 inputPosition = Vector3.zero;
#if UNITY_2017_2_OR_NEWER
InteractionSourceInfo sourceKind;
currentInputSource.TryGetSourceKind(currentInputSourceId, out sourceKind);
switch (sourceKind)
{
case InteractionSourceInfo.Hand:
currentInputSource.TryGetGripPosition(currentInputSourceId, out inputPosition);
break;
case InteractionSourceInfo.Controller:
currentInputSource.TryGetPointerPosition(currentInputSourceId, out inputPosition);
break;
}
#else
currentInputSource.TryGetPointerPosition(currentInputSourceId, out inputPosition);
#endif
Vector3 pivotPosition = GetHandPivotPosition(cameraTransform);
handRefDistance = Vector3.Magnitude(inputPosition - pivotPosition);
objRefDistance = Vector3.Magnitude(initialDraggingPosition - pivotPosition);
Vector3 objForward = HostTransform.forward;
Vector3 objUp = HostTransform.up;
// Store where the object was grabbed from
objRefGrabPoint = cameraTransform.transform.InverseTransformDirection(HostTransform.position - initialDraggingPosition);
Vector3 objDirection = Vector3.Normalize(initialDraggingPosition - pivotPosition);
Vector3 handDirection = Vector3.Normalize(inputPosition - pivotPosition);
objForward = cameraTransform.InverseTransformDirection(objForward); // in camera space
objUp = cameraTransform.InverseTransformDirection(objUp); // in camera space
objDirection = cameraTransform.InverseTransformDirection(objDirection); // in camera space
handDirection = cameraTransform.InverseTransformDirection(handDirection); // in camera space
objRefForward = objForward;
objRefUp = objUp;
// Store the initial offset between the hand and the object, so that we can consider it when dragging
gazeAngularOffset = Quaternion.FromToRotation(handDirection, objDirection);
draggingPosition = initialDraggingPosition;
StartedDragging.RaiseEvent();
}
