AddTorque();関数で力を消す方法

提示コードの回転のコメント部のコードですが十字キーの上下を押したときに力をかけて上下に回転するのですが。キーを離した時にその力を消方法はあるのでしょうか？調べましたがわかりません。

cs
1using System.Collections;
2using System.Collections.Generic;
3using UnityEngine;
4
5public class PlayerController : MonoBehaviour
6{
7    [SerializeField] float wingsArea;     //翼の面積
8    [SerializeField] float airDensity;    //空気密度
9    [SerializeField] float speed;         //速度
10    [SerializeField] float cl;            //揚力係数
11
12
13    Rigidbody rb;
14
15    float L;    //揚力
16    Vector3 moveVec;    //向き
17    Vector3 angleVec;   //回転
18
19
20    // Start is called before the first frame update
21    void Start()
22    {
23        rb = GetComponent<Rigidbody>();
24        moveVec = new Vector3(0,0,0);
25        angleVec = new Vector3(0,0,0);
26
27        L = 0;
28
29    }
30
31    // Update is called once per frame
32    void Update()
33    {
34        if(Input.GetKey(KeyCode.W))
35        {
36
37        }
38        else if (Input.GetKey(KeyCode.S))
39        {
40        }
41        else
42        {
43            
44        }
45
46        
47
48        if(Input.GetKey(KeyCode.UpArrow))
49        {
50            angleVec.x = 1f;
51            cl += -1;
52
53        }
54        else if (Input.GetKey(KeyCode.DownArrow))
55        {
56            angleVec.x = -1f;
57            cl += 1;
58        }
59        else
60        {
61            angleVec.y = 0;
62        }
63
64
65        //ヨール
66        if (Input.GetKey(KeyCode.LeftArrow))
67        {
68            angleVec.z = 40;
69            
70        }
71        else if (Input.GetKey(KeyCode.RightArrow))
72        {
73            angleVec.z = -40;
74            
75        }
76        else
77        {
78            angleVec.z = 0;
79        }
80
81
82
83
84        //揚力計算 
85//        moveVec.y = lift(airDensity, wingsArea, speed, cl) / 1000 * Time.deltaTime;   //揚力
86
87
88//        Debug.Log(moveVec.y);
89
90//        moveVec.z = speed;
91    }
92
93    float m_AeroFactor = 0;
94
95
96    void FixedUpdate()
97    {
98
99        //前進
100        var forces = Vector3.zero;
101        forces = speed * transform.forward;
102        Vector3 liftDirection = Vector3.Cross(rb.velocity, transform.right).normalized;
103        var liftPower = lift(airDensity, wingsArea, speed, cl) / 1000 * Time.deltaTime;
104        forces += liftPower * liftDirection;
105        rb.AddForce(forces);
106
107        //回転
108        var torque = Vector3.zero;
109        torque += angleVec.x * transform.right;
110        torque += angleVec.z * transform.forward;
111        rb.AddTorque(torque * speed * Time.deltaTime);
112
113
114
115
116
117        // "Aerodynamic" calculations. This is a very simple approximation of the effect that a plane
118        // will naturally try to align itself in the direction that it's facing when moving at speed.
119        // Without this, the plane would behave a bit like the asteroids spaceship!
120        if (rb.velocity.magnitude > 0)
121        {
122            // compare the direction we're pointing with the direction we're moving:
123            m_AeroFactor = Vector3.Dot(transform.forward,rb.velocity.normalized);
124            // multipled by itself results in a desirable rolloff curve of the effect
125            m_AeroFactor *= m_AeroFactor;
126            // Finally we calculate a new velocity by bending the current velocity direction towards
127            // the the direction the plane is facing, by an amount based on this aeroFactor
128            var newVelocity = Vector3.Lerp(rb.velocity, transform.forward * speed,
129                                           m_AeroFactor * speed * 1f * Time.deltaTime);
130            rb.velocity = newVelocity;
131
132            // also rotate the plane towards the direction of movement - this should be a very small effect, but means the plane ends up
133            // pointing downwards in a stall
134            rb.rotation = Quaternion.Slerp(rb.rotation,
135                                                  Quaternion.LookRotation(rb.velocity, transform.up),
136                                                  1f * Time.deltaTime);
137        }
138
139
140
141    }
142
143
144
145
146
147    //揚力を取得
148    float lift(float air,float wing,float spd,float cl)
149    {
150        float l = (air / 2) * wing * spd * spd * cl;  //揚力計算
151
152
153        return l;
154    }
155
156
157
158
159}
160