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Update Polygon Collider 2d on skeletal animations

Discussion in 'Physics' started by Kidara, May 15, 2020.

  1. Kidara

    Kidara

    Joined:
    Jul 6, 2017
    Posts:
    16
    Hello there,

    the title is pretty much self-explanatory. I'd like to update my polygon collider 2d every frame to match the skeletal animations 2d that I create.
    Is there a way to do so?

    Thank you
     
    Kidara, May 15, 2020
    #1

  2. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,623
    No and it'd be pretty expensive to do so; especially so because physics doesn't even run per-frame. A PolygonCollider2D isn't a single primitive shape, it's path(s) that form outline(s) that it then has to decompose into multiple convex polygons.
     
    MelvMay, May 15, 2020
    #2

  3. Kidara

    Kidara

    Joined:
    Jul 6, 2017
    Posts:
    16
    Yeah I know it's expensive, but I would use only for a simple game with high precision.
    Anyway, the only thing I can do is to generate some spritesheet animation and map a collider on every animation frame, and update PolygonCollider2D with these colliders when animation is called. Right?
     
    Kidara, May 15, 2020
    #3

  4. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,623
    If you feel that this kind of collision fidelity is worth the expense then sure.
     
    MelvMay, May 15, 2020
    #4
    Kidara likes this.