Unity3d 中的 Arrow GameObject 不会飞

Question

我在unity5中实现了一个弓箭脚本。但是箭并没有飞出去。有人可以建议为什么会这样。我是初学者。

这是弓脚本。

using UnityEngine;
using System.Collections;

public class Bow : MonoBehaviour {

    private GameObject arrow = null;
    private Vector3 fwd = Vector3.zero;




    public GameObject arrowPrefab = null;
    public int initialSpeed = 30;
    public GameObject launchPosition = null;
    public float waitTime = 0.1f;
    public LayerMask layerMask;


    // Use this for initialization
    void Start ()
    {

    }

    void FixedUpdate()
    {
        fwd = transform.TransformDirection(Vector3.forward);
        if (!Physics.Raycast(transform.position, fwd, 1, layerMask))
        {
            if (Input.GetMouseButtonDown(0))
            {
                Fire();
            }
        }
    }



    private void Fire()
    {
        //yield return new WaitForSeconds(waitTime);
        new WaitForSeconds(waitTime);
        arrow = (GameObject)Instantiate(arrowPrefab, launchPosition.transform.position, launchPosition.transform.rotation);
    }


}

这是箭头脚本

using UnityEngine;
using System.Collections;

public class Arrow : MonoBehaviour {

    private Vector3 velocity = Vector3.zero;
    private Vector3 newPos;
    private Vector3 oldPos;
    private bool hasHit = false;
    private Vector3 direction;
    private RaycastHit hit;
    private GameObject follow;

    private Vector3 dir;
    private float dist;

    public LayerMask layerMask;
    public float speed;
    public Transform arrowRotation;
    public float forceToApply;
    public float arrowGravity;


    void Start()
    {
        newPos = transform.position;
        oldPos = newPos;
        velocity = speed * transform.forward;
    }

    void update()
    {
        if (hasHit)
        {
            transform.position = follow.transform.position;
            transform.rotation = follow.transform.rotation;
            return;
        }

        newPos += (velocity + direction) * Time.deltaTime;
        dir = newPos - oldPos;
        dist = dir.magnitude;

        dir /= dist;

        if(dist > 0)
        {
            if (Physics.Raycast(oldPos,dir,out hit,dist,layerMask))
            {
                newPos = hit.point;

                if (hit.collider)
                {
                    if (hit.rigidbody)
                    {
                        GameObject hitpoint = (GameObject)Instantiate(new GameObject(), hit.point, transform.root.rotation);
                        hitpoint.transform.parent = hit.transform;
                        follow = hitpoint;
                        GetComponent<Collider>().isTrigger = true;
                        hit.rigidbody.AddForceAtPosition(forceToApply * dir, hit.point);
                        hasHit = true;
                    }
                    else
                    {
                        enabled = false;
                    }
                }
            }
        }

        oldPos = transform.position;
        transform.position = newPos;
        velocity.y -= arrowGravity * Time.deltaTime;
        arrowRotation.transform.rotation = Quaternion.LookRotation(dir);

    }



}

Answer 1

您在 Arrow 脚本中声明，但未定义 'direction'。我怀疑将它包含在 newPos 计算中意味着没有添加任何内容。

Unity3d 中的 Arrow GameObject 不会飞

Arrow GameObject in Unity3d won't fly

unity3d

unity5