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Help with Mesh Collider

Discussion in '2D' started by scossgrove, Jul 8, 2022.

  1. scossgrove

    scossgrove

    Joined:
    Jan 6, 2016
    Posts:
    23
    Hi,


    I have a character with a circle collider on it with the following settings:
    upload_2022-7-8_15-40-31.png

    From the image below you can see the collider circle around the player:

    upload_2022-7-8_15-40-19.png

    Then I have a dynamic mesh created and set against a mesh collider:
    upload_2022-7-8_15-42-7.png
    you can see the collider mesh below:
    upload_2022-7-8_15-41-48.png

    My issue is that I can move straight throw the mesh collider.

    The player is moved using a rigidBody2 and the velocity.

    Can anyone tell me what I am doing wrong here?

    Thanks in advance
     
    scossgrove, Jul 8, 2022
    #1

  2. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,533
    The MeshCollider is a 3D physics collider. The CircleCollider2D is a 2D physics collider. They don't interact, they are completely different systems.

    Also, don't go modifying the Transform when using 2D physics. Use a Rigidbody2D and its API to cause movement, this is how 2D physics works. Colliders are attached to Rigidbody2D. A Rigidbody2D has three body-types to choose from too.

    I would suggest following some tutorials here or using Unity Learn for more information.
     
    MelvMay, Jul 8, 2022
    #2

  3. scossgrove

    scossgrove

    Joined:
    Jan 6, 2016
    Posts:
    23
    OK So what type of collider to I used with a mesh in 2d?
     
    scossgrove, Jul 8, 2022
    #3

  4. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,533
    2D physics cannot use a 3D mesh, it's 2D. There's a PolygonCollider2D that essentially produces a similar thing from outlines dynamically but as I mentioned above, there's plenty of tutorials online for more info.
     
    MelvMay, Jul 8, 2022
    #4