With a low framerate it is possible for Input.GetMouseButtonUp and Input.GetMouseButtonDown to be true for the same frame. This causes populateFromMouse to begin a new touch before the last one has ended. This ultimately ends up with gestures having the same touch (id=0) inserted into their _trackingTouches list.
Near the top of internalUpdateTouches right after this line:
_liveTouches.Add( _touchCache[0].populateFromMouse() );
I added the following code:
mu += Input.GetMouseButtonUp(0) ? "u" : "-";m += Input.GetMouseButton(0) ? "m" : "-";md += Input.GetMouseButtonDown(0) ? "d" : "-";history += _liveTouches.Count != 0 ? ((int)_liveTouches[0].phase).ToString() : "-";Debug.Log(history + "\n" + mu + "\n" + m + "\n" + md);
This prints:
----------0112223------02111301303013-03--0110----------------u-----------u--u-u--u--u-----u----------mmmmmm-------mmmmm-mm-m-mm--m---mmmm----------d------------d-----d--d-d---d---d--d
As can be seen, at the end (0110 pattern) means you get "Begin Move Move Begin" for the fake touch which causes the issue.
With a low framerate it is possible for Input.GetMouseButtonUp and Input.GetMouseButtonDown to be true for the same frame. This causes populateFromMouse to begin a new touch before the last one has ended. This ultimately ends up with gestures having the same touch (id=0) inserted into their _trackingTouches list.
Near the top of internalUpdateTouches right after this line:
_liveTouches.Add( _touchCache[0].populateFromMouse() );I added the following code:mu += Input.GetMouseButtonUp(0) ? "u" : "-";m += Input.GetMouseButton(0) ? "m" : "-";md += Input.GetMouseButtonDown(0) ? "d" : "-";history += _liveTouches.Count != 0 ? ((int)_liveTouches[0].phase).ToString() : "-";Debug.Log(history + "\n" + mu + "\n" + m + "\n" + md);This prints:
----------0112223------02111301303013-03--0110----------------u-----------u--u-u--u--u-----u----------mmmmmm-------mmmmm-mm-m-mm--m---mmmm----------d------------d-----d--d-d---d---d--dAs can be seen, at the end (0110 pattern) means you get "Begin Move Move Begin" for the fake touch which causes the issue.