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How to Add StateMachineBehaviour at Runtime?

Discussion in 'Animation' started by kylin9872, Jan 24, 2015.

  1. kylin9872

    kylin9872

    Joined:
    Nov 3, 2014
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    Can I add or remove StateMachineBehaviour for an AnimatorState in Unity 5.0?
    Who can give some example or hint?
    Thank you?
     
    kylin9872, Jan 24, 2015
    #1

  2. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    You cannot add or remove SMB at runtime, but you can activate/deactivate them
     
    Mecanim-Dev, Jan 26, 2015
    #2

  3. kylin9872

    kylin9872

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    Thank you!
     
    kylin9872, Jan 27, 2015
    #3

  4. Anderson-Cardoso859

    Anderson-Cardoso859

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    Mar 23, 2014
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    Hi Mecanim.Dev,

    How can I activate/deactivate a SMB at runtime? I mean by code, is it possible?
     
    Last edited: Mar 29, 2015
    Anderson-Cardoso859, Mar 29, 2015
    #4

  5. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    Damn you are right, there is no API function to activate/deactivate a SMB, the engine does support it as we check for SMB activeness before calling any callback. You can disable them via the inspector for now. We will add proper support for runtime ASAP.

    smbactive.png
     
    Mecanim-Dev, Mar 30, 2015
    #5

  6. Anderson-Cardoso859

    Anderson-Cardoso859

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    Thanks for the reply.

    From what I've tested the OnEnable/OnDisable callbacks are being called when I activate/deactivate the SMB in the Inspector, what is weird (for me at least) is that they are being called when I'm not in playmode.

    It would be awesome if the OnEnable/OnDisable callbacks were called during playmode only. And I could use the ExecuteInEditMode attribute if I also want these callbacks during editor (like in MonoBehaviours). Just a little suggestion.

    Keep the good work.

    Regards,
     
    Last edited: Mar 30, 2015
    Anderson-Cardoso859, Mar 30, 2015
    #6

  7. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    Yes that make sense, I'm adding a new feature request for this
     
    Mecanim-Dev, Mar 31, 2015
    #7
    Anderson-Cardoso859 likes this.

  8. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    Hi Anderson,

    Just to let you know that OnEnable/OnDisable should now be called only in playmode, this new feature is making is way to 5.2

    For ExecuteInEditMode attribut we won't support it for state machine behaviour because they are invoked by the animator depending on which state is currently playing, In the editor the animator is not ticked so that wouldn't make any sense.
     
    Mecanim-Dev, Jun 18, 2015
    #8

  9. kilik128

    kilik128

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    Jul 15, 2013
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    got trouble OnStateEnter is called 2 time
    and change variable not working in runtime anymore in 5.3 ?
    any info about that's please
     
    kilik128, Dec 18, 2015
    #9

  10. Trisibo

    Trisibo

    Joined:
    Nov 1, 2010
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    @Mecanim-Dev, it seems it's still not possible to add and enable/disable StateMachineBehaviours at runtime, is that right or am I missing the way to do it?
     
    Trisibo, Apr 12, 2017
    #10

  11. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    no there is no way to add a SMB at runtime. You can enable/disable SMB in the editor but at runtime it not possible at the moment.
    Enabling/Disabling at runtime is something I did try to implement in 5.0 but due to technical issue it was not possible.
    I did try last week again in 2017.1 and we still have the same technical issue.
    The problem is that SMB derived from scriptableobject which doesn't support enable/disable state and changing this cause a lot of regressions in other part of unity, the scripting team is aware of this limitation but they don't have the bandwidth to fix this.
     
    Mecanim-Dev, Apr 12, 2017
    #11

  12. panta

    panta

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    @Mecanim-Dev any news on this? It would be super useful to have...
     
    panta, Oct 29, 2018
    #12

  13. Mecanim-Dev

    Mecanim-Dev

    Unity Technologies

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    @panta unfortunately no, this is not a high priority feature for scripting team
     
    Mecanim-Dev, Oct 29, 2018
    #13

  14. panta

    panta

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    @Mecanim-Dev thank you for the response. I ended up making a base class with an "enabled" field, and checking that before running any of the state machine behaviour functions. Pretty hacky/error-prone, but it's something I suppose...

    Hopefully the priority will be reconsidered in the future
     
    panta, Oct 29, 2018
    #14

  15. remiC3D

    remiC3D

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    Dec 15, 2017
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    Hello, I've read this thread, so, I understand you can't add/remove a statemachine behavior at runtime, nor enable/disable it, is that correct ? If so, what would be the recommended way, from a mono behavior script, to ask an animator to play a particular state, THEN, to call (or not) method Foo() when this state exits ?
     
    remiC3D, Jan 16, 2019
    #15

  16. EthanF4D

    EthanF4D

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    Jan 9, 2018
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    Runtime add animation event on the clip of that state, that signal to your script Foo() is needed to be called, and remove the event afterwards.
    Obviously has its limitations
     
    EthanF4D, May 20, 2019
    #16

  17. EthanF4D

    EthanF4D

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    On the other hand I have a half runtime solution. (not at runtime) add common state machine behaviours to relevant states that propagates whatever state machine event are received. E.g OnEnterStateBehaviour OnExitStateBehaviour.
    Then your custom script subscribe to those events.
     
    EthanF4D, May 20, 2019
    #17

  18. Xero82

    Xero82

    Joined:
    Mar 7, 2015
    Posts:
    3
    @Mecanim-Dev Although we can't enable/disable at runtime, is there a way to do it via an editor script? I currently have a validation script to ensure specific behaviours are added to AnimatorStates to all character animators in a given folder. I can add them if they don't exist, that's fine. But if the behaviour script is disabled is still appears in AnimatorState.behaviours, so it passes validation. Can I detect if the script is enabled?
     
    Xero82, May 11, 2023
    #18