Fix infinite loop state check in AnimationStateMachine
#79141
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TokageItLab
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akien-mga
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How is the issue communicated to the user when such a potential infinite loop is detected? I see it breaks but doesn't raise an error (here at least, it maybe does further up the stack). Will users understand that their setup is non functional due to recursion? |
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Perhaps the state continues to change every frame, but that is a normal transition and not an error. Since Nodes in StateMachine cannot have a path to itself, if this check works, there is no longer an infinite loop in the true sense of the word. |
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@akien-mga I've added a warning in case you're concerned.
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bruvzg
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akien-mga
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YuriSizov
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AnimationStateMachineAnimationStateMachine
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Thanks! |
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Cherry-picked for 4.1.1. |
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Fixes #79012.
If only the first pass is stored and compared, the loop detection will fail if an infinite loop starts in the middle of the path. So, all transition paths must be stored and compared. Also, remove
is_state_changed = falseas it was actually wrong (state change occurs just before the try infinite loop).