GameObject's Following a Leader / Centipede Issue

问题

I am having difficulty chaining together some GameObjects to "Follow the leader".

This is what I am trying to accomplish:

Where there is a "head" object and it pulls the body objects with it. Like a snake or centipede.

However, this is what is happening:

They all kinda follow the head and but they seem to move as a whole.

Can anyone see what I am doing wrong?

Here is my Centipede Object that the others classes inherit from. I started to tinker with the idea of just making the CentipedeObject move all of the independent GameObjects. But that didn't work.

CentipedeObject.cs

public abstract class CentipedeObject : MonoBehaviour {

    [SerializeField]
    private float moveSpeed = 1.5f;

    public float MoveSpeed {
        get {
            return moveSpeed;
        }
    }
}

Here is the CentipedeHead that does the moving.

public class CentipedeHead : CentipedeObject {

    private Rigidbody2D _body;
    private Vector2 moveDirection = Vector2.zero;
    private void Awake() {
        _body = GetComponent<Rigidbody2D>();
        _body.gravityScale = 0;
        _body.constraints = RigidbodyConstraints2D.FreezeRotation;

    }
    private void Start() {
        InvokeRepeating("ChangeDirection", 0, Random.Range(1.25f, 3.0f));
    }

    private void FixedUpdate() {
        _body.velocity = moveDirection.normalized * MoveSpeed;
    }

    private void ChangeDirection() {

        moveDirection = Vector2.zero;

        switch (Random.Range(0, 4)) {
            case 0:
                moveDirection += Vector2.up;
                break;
            case 1:
                moveDirection += Vector2.right;
                break;
            case 2:
                moveDirection += Vector2.down;
                break;
            case 3:
                moveDirection += Vector2.left;
                break;

        }
    }
}

And the CentipedeBody part that should just follow the head or another body part.

public class CentipedeBody : CentipedeObject {

    public GameObject objectToFollow;

    private Vector3 followSize;

    void Start() {
        //Get the size of the object we are following
        followSize = objectToFollow.GetComponent<SpriteRenderer>().bounds.size;

        //Set initial distance
        transform.position = objectToFollow.transform.position + followSize;
    }

    private void FixedUpdate() {
        Vector3 followFromPosition = objectToFollow.transform.position + followSize;
        transform.position = Vector3.MoveTowards(transform.position, followFromPosition, MoveSpeed * Time.deltaTime);
    }
}

回答1:

I think the logic of updating the pixels is wrong. When the head moves one pixel left. You are making all other body parts move left by 1 pixel. Where as what you need to do is that (from your diagram) 2 takes the exact place where 1 was. 3 takes the place where 2 was and so on.

来源：https://stackoverflow.com/questions/46791141/gameobjects-following-a-leader-centipede-issue

标签

unity3d

gameobject

unity2d