Demigiant
commented
1 year ago Ahoy!
Indeed backwards tweens were never meant to be played infinitely, because conceptually an infinite tween is infinite only in its ending position while it always has a starting one. A trick in this case is to just create a tween with a very high number of loops, complete it (paying attention not to auto-kill it by completion), then play it backwards.
In TweenManager.cs, line 549 handles isBackwards update with :
while (toPosition < 0 && toCompletedLoops > -1) {It is different from line 560 for !isBackwards Update which covers the infinite loops case (t.loops == -1):while (toPosition >= t.duration && (t.loops == -1 || toCompletedLoops < t.loops)) {It seems to make Flip() on infinitely looping tweens impossible; I've tested with:while (toPosition < 0 && (t.loops == -1 || toCompletedLoops > -1)) {and it seems to have resolved the issue.I don't quite understand what the comment in the isBackwards part means though, so I'm not sure what to do with that extra toPosition handling snippet. I had removed it and it didn't break my tweens.
// Result is equivalent to a rewind, so set values according to it