unity HTC Vive 通过手柄控制3D物体移动、旋转

最近项目需要功能：player上车后，手柄可以控制汽车移动。
实现这个功能比较简单,主要是通过手指的位置计算出手指与轴（Vector2.up）之间的夹角。
在使用之前需要在Action中添加bool属性的TrackPadTouch，并把这个属性绑定在圆盘上。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Valve.VR;

public enum UseObject
{
    Car,
    Player
}
 
[ExecuteInEditMode]
public class ControlCar: MonoBehaviour
{
    public GameObject Cube;

    public Transform player;

    public Camera scenceCamera;

    private UseObject useObject = UseObject.Player;

    private float mixDistance=1;

    private Vector2 fingerPos;
     
    void Update()
    {
        if (SteamVR_Actions._default.TrackPadTouch.GetState(SteamVR_Input_Sources.Any))
        {
            fingerPos = SteamVR_Actions._default.TrackPadPos.lastAxis;
            ComputeDistance();
            ControlMove();
        }
    } 

    private float CountAngle()
    {
        float Angle = Mathf.Acos(Vector2.Dot(fingerPos, Vector3.up))*Mathf.Rad2Deg;
        Angle = fingerPos.x < 0 ? - Angle: Angle;
        return Angle;
    }

    private void ControlMove()
    {
        switch (useObject)
        {
            case UseObject.Player:
                player.position = Vector3.MoveTowards(player.position,
                        player.position + new Vector3(fingerPos.x,
                       0, fingerPos.y), Time.deltaTime);
                break;
            case UseObject.Car:
               Cube.transform.position = Vector3.MoveTowards(Cube.transform.position, Cube.transform.position + Cube.transform.forward, Time.deltaTime);
                ControlRotate(Cube.gameObject, SteamVR_Actions._default.TrackPadPos.lastAxis);
                break;
        }
    }

    private void ControlRotate(GameObject Obj, Vector3 Pos)
    {
        Vector3 tragt = new Vector3(Obj.transform.localEulerAngles.x, CountAngle(), Obj.transform.localEulerAngles.z);
        Obj.transform.rotation = Quaternion.RotateTowards(Obj.transform.rotation, Quaternion.Euler(0, CountAngle(),0), Time.deltaTime * 100);
    }

    private void ComputeDistance()
    {
        float distance = Vector3.Distance(player.position, Cube.transform.position);
        if (distance < mixDistance)
        {
            player.gameObject.SetActive(false);
            scenceCamera.gameObject.SetActive(true);
            useObject=UseObject.Car;
        }
    }

    private void OnDrawGizmos()
    {
        Gizmos.DrawLine(Vector3.zero, Quaternion.Euler(0,-45,0)*Vector3.right);
        Gizmos.DrawLine(Vector3.zero, Cube.transform.position);
    }
}