Unity 5.6 2D- 如何检查 2 个对撞机是否没有接触任何其他对撞机？

Question

In Unity 5.6 C#, I know there is a way to check for if a collider is being touched by any other collider by using IsTouching.

However, I would like to know how to group two colliders together(that are touching each other), and how to check if they both are touching any collider besides each other.

Answer 1

I will give it a shot with the idea I mentioned in the comments (I see it is hard to understand with only the comments section).

I would use a list of collisions and store any touches here, filtering out the "partner" collider using OnCollisionEnter and OnCollisionExit .

Since both are attached to the same GameObject it is easy to filter them:

public class Collisions : MonoBehaviour
{
    // Show in the Inspector for debug
    [SerializeField] private List<Collider> colliderList = new List<Collider>();

    public bool IsTouching => colliderList.Count != 0;

    private void Awake ()
    {
        // Make sure list is empty at start
        colliderList.Clear();
    }

    private void OnCollisionEnter(Collision collision)
    {
        // Filter out own collider
        if(collision.gameObject == gameObject) return;

        if(!colliderList.Contains(collision.collider) colliderList.Add(collision.collider);
    }

    private void OnCollisionExit(Collision collision)
    {
        // Filter out own collider
        if(collision.gameObject == gameObject) return;

        if(colliderList.Contains(collision.collider) colliderList.Remove(collision.collider);
    }
}

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Typed on smartphone but I hope the idea gets clear