Question

我的右Vive控制器上有一个触发器对撞机，用于检测＆＃34; Enemy＆＃34;标记的游戏对象何时在抓取范围内。要创建一个“抓取”，＆＃39;我向控制器添加了一个FixedJoint组件，其中Enemy gameobject为connectedBody。释放夹点后，我设置connectedBody = null和Destroy(joint)（其中关节是FixedJoint）。每当我释放selectedObj时，它就会以零速度落到地面上。是什么给了什么？

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Grab : MonoBehaviour {
    private GameObject selectedObj;
    private GameObject grabbableEnemy;
    public Transform gripTransform;
    private SteamVR_TrackedObject trackedObject;
    private SteamVR_Controller.Device _controllerDevice;
    private SteamVR_TrackedController _controller;

    private Vector3[] positions = new Vector3[2]; // positions[0] last frame, positions[1] this frame;
    private Vector3 releasedVelocity;

    void Awake()
    {
        trackedObject = GetComponent<SteamVR_TrackedObject>();
    }

    // Use this for initialization
    void Start () {
        _controllerDevice = SteamVR_Controller.Input((int)trackedObject.index);
        _controller = GetComponent<SteamVR_TrackedController>();
        positions[0] = Vector3.zero;
        positions[1] = Vector3.zero;
        releasedVelocity = new Vector3(-99,-99,-99);

        selectedObj = null;
        grabbableEnemy = null;
    }

    // Update is called once per frame
    void FixedUpdate () {
        if (selectedObj)
        {
            Debug.Log("Updating velocity");
            positions[0] = positions[1];
            positions[1] = selectedObj.transform.position;
            Debug.Log("Selected obj velocity: " + selectedObj.GetComponent<Rigidbody>().velocity);
        }
        if (_controllerDevice.GetPressDown(SteamVR_Controller.ButtonMask.Grip))
        {
            Debug.Log("Gripped");
            if (grabbableEnemy)
            {
                Debug.Log("Grab sequence begins");
                selectedObj = grabbableEnemy;
                Debug.Log(selectedObj.name);
                selectedObj.transform.position = gripTransform.position;
                var joint = gameObject.AddComponent<FixedJoint>();
                joint.connectedBody = selectedObj.GetComponent<Rigidbody>();
            }
        }
        if (_controllerDevice.GetPressUp(SteamVR_Controller.ButtonMask.Grip))
        {
            Debug.Log("Ungripped");
            if (gameObject.GetComponent<FixedJoint>() && selectedObj)
            {
                Debug.Log("Launch sequence begins");
                // currently unused velocity value
                releasedVelocity = (positions[1] - positions[0]) / Time.deltaTime;

                foreach (FixedJoint joint in gameObject.GetComponents<FixedJoint>()) {
                    joint.connectedBody = null;
                    Destroy(joint);
                }
                selectedObj.GetComponent<Rigidbody>().velocity = gameObject.GetComponent<Rigidbody>().velocity;
                selectedObj.GetComponent<Rigidbody>().angularVelocity = gameObject.GetComponent<Rigidbody>().angularVelocity;

                Debug.Log("Released @ release: " + selectedObj.GetComponent<Rigidbody>().velocity);

                // For garbage collection?
                selectedObj = null;      
            }
        }
    }

    private void OnTriggerStay(Collider other)
    {
        Debug.Log("Triggered");
        if (other.gameObject.tag == "Enemy")
        {
            grabbableEnemy = other.gameObject;
        }
    }

    private void OnTriggerExit(Collider other)
    {
        grabbableEnemy = null;
    }
}

Answer 1

您正在计算releasedVelocity，但从未设置任何使用其值的内容。

你有：

selectedObj.GetComponent<Rigidbody>().velocity = gameObject.GetComponent<Rigidbody>().velocity;

但这只会将速度设置为您的脚本所附加的GameObject的速度。我猜你想做：

selectedObj.GetComponent<Rigidbody>().velocity = releasedVelocity;

SteamVR GameObject刚体从抓取中以零速度释放

1 个答案: