// one of the fingers holding a draggable object is moving.
// Update the dragged object position accordingly.
void draggable_OnDragMove(TBDrag sender)
{
// figure out our previous screen space finger position
Vector2 prevFingerPos = sender.FingerPos - sender.MoveDelta;
Vector3 fingerPos3d, prevFingerPos3d;
// convert these to world-space coordinates, and compute the amount of motion we need to apply to the object
if (ProjectScreenPointOnDragPlane(sender.transform.position, prevFingerPos, out prevFingerPos3d) &&
ProjectScreenPointOnDragPlane(sender.transform.position, sender.FingerPos, out fingerPos3d))
{
Vector3 move = fingerPos3d - prevFingerPos3d;
sender.transform.position += move;
}
}
public float dragPlaneOffset = 0.0f; // distance between dragged object and drag constraint plane
void FingerGestures_OnFingerDragBegin(int fingerIndex, Vector2 fingerPos, Vector2 startPos)
{
// check if the object is draggable
TBDrag draggable = PickComponent <TBDrag>(startPos);
if (draggable && !draggable.Dragging)
{
// initiate the drag operation
draggable.BeginDrag(fingerIndex, fingerPos);
// register to the drag move & end events so we can update this object's position and unsubscribe to these events when done.
draggable.OnDragMove += draggable_OnDragMove;
draggable.OnDragEnd += draggable_OnDragEnd;
}
}
void draggable_OnDragEnd(TBDrag source)
{
// unsubscribe from this object's drag events
source.OnDragMove -= draggable_OnDragMove;
source.OnDragEnd -= draggable_OnDragEnd;
}
