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rigidbody.disable is gone? since when?

Discussion in 'Physics' started by CyberTurboPlays, Jun 28, 2015.

  1. CyberTurboPlays

    CyberTurboPlays

    Joined:
    Nov 7, 2014
    Posts:
    65
    hi

    i want to disable rb and enable them when i need it to.

    sleep or col detection off wont help since the cost remain the same for my game, but removing the rb helps, so i really want to disable rb and enable when needed for my particular situation

    how can i go about this, guys?

    Why would unity remove the enabling/disabling of rb in the 1st place?
     
    CyberTurboPlays, Jun 28, 2015
    #1

  2. Osirius

    Osirius

    Joined:
    Oct 10, 2014
    Posts:
    47
    Yeah, Unity removed this a while ago.
    The closest you can get is making it Kinematic and disabling collisions. The processing cost should be much lower for a Kinematic with no collisions.

    Or, you could always add a child object and move any colliders and rigidbodys over, then when you want to disable the rigidbody you could just disable the child object.
     
    Osirius, Jun 28, 2015
    #2

  3. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,557
    MelvMay, Jun 28, 2015
    #3

  4. CyberTurboPlays

    CyberTurboPlays

    Joined:
    Nov 7, 2014
    Posts:
    65
    thx man, that is exactly what i did to go around it
     
    CyberTurboPlays, Jul 4, 2015
    #4

  5. CyberTurboPlays

    CyberTurboPlays

    Joined:
    Nov 7, 2014
    Posts:
    65
    really wanna know "disable gameobj" and "disable just the RB", which one is cheaper, now i hav no way of knowing that
     
    CyberTurboPlays, Jul 4, 2015
    #5

  6. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,557
    I'm guessing that the problem was that when you disabled a Rigidbody component, what should be done with all the attached colliders? Colliders only attach to a Rigidbody that is active on the same GameObject are on a parent GameObject. Disabling the Rigidbody would mean they'd not attach to it and therefore they'd be static which isn't probably what you'd want.

    Disabling a GameObject is more expensive than disabling a single component but it all depends on what components are on the GameObject and its children.

    When I implemented the 2D physics stuff, for this reason, I did not allow the Rigidbody2D to be disabled as the required behaviour wasn't very clear and different users would want different things. This is why I added the option I mentioned above which has a well defined behaviour, only affects the Rigidbody, joints and colliders and is very fast.
     
    MelvMay, Jul 4, 2015
    #6

  7. CyberTurboPlays

    CyberTurboPlays

    Joined:
    Nov 7, 2014
    Posts:
    65

    now i wish we have that on the 3D one la, sounds way cheaper and specific, meaning dont have to guess how much it would cost:)
     
    CyberTurboPlays, Jul 5, 2015
    #7