C# 如何用触摸输入旋转一个物体，然后缓慢地停止？

我从这里得到了一些代码：

这段代码通过鼠标点击和拖动来旋转一个对象，点击之后，对象缓慢停止。我现在想在手机上使用这个功能。这是我的手机版代码：

// Update is called once per frame
public void Update() {

    // Track a single touch as a direction control.
    if (Input.touchCount > 0) {
        Touch touch = Input.GetTouch(0);

        // Handle finger movements based on touch phase.
        switch (touch.phase) {
            // Record initial touch position.
            case TouchPhase.Began:
                startPos = touch.position;
                directionChosen = false;
                break;

            // Determine direction by comparing the current touch position with the initial one.
            case TouchPhase.Moved:
                direction = touch.position - startPos;
                break;

            // Report that a direction has been chosen when the finger is lifted.
            case TouchPhase.Ended:
                directionChosen = true;
                stopSlowly = true;
                Debug.Log("end");
                break;
        }
    }
    if (directionChosen) {
        // Something that uses the chosen direction...
        theSpeed = new Vector3(-direction.x, direction.y, 0.0F);
        avgSpeed = Vector3.Lerp(avgSpeed, theSpeed, Time.deltaTime * 5);
    } else {
        if (stopSlowly) {
            Debug.Log("TESTOUTPUT");
            theSpeed = avgSpeed;
            isDragging = false;
        }
        float i = Time.deltaTime * lerpSpeed;
        theSpeed = Vector3.Lerp(theSpeed, Vector3.zero, i);
    }

    transform.Rotate(camera.transform.up * theSpeed.x * rotationSpeed, Space.World);
    transform.Rotate(camera.transform.right * theSpeed.y * rotationSpeed, Space.World);

以下是一些变量，我使用Vector2变量表示起始点和方向：

private float rotationSpeed = 1f;
private float lerpSpeed = 1.0F;

private Vector3 theSpeed;
private Vector3 avgSpeed;
private bool isDragging = false;
private Vector3 targetSpeedX;


public Vector2 startPos;
public Vector2 direction;
public bool directionChosen;
public bool stopSlowly;

现在，如果我按play并旋转手机上的对象，它会旋转，但不会自行结束。它的旋转速度也非常快。当我触摸物体一次时，它立即停止。 请有人告诉我我的代码到底出了什么问题。我的目标只是一个旋转，从触摸输入开始初始化，缓慢结束直到静止

---

谢谢

你的情况很令人困惑。 试试这样的

    // Handle finger movements based on touch phase.
    switch (touch.phase) {
        // Record initial touch position.
        case TouchPhase.Began:
            startPos = touch.position;
            break;

        // Determine direction by comparing the current touch position with the initial one.
        case TouchPhase.Moved:
            direction = touch.position - startPos;
            isDragging = true;
            break;

        // Report that a direction has been chosen when the finger is lifted.
        case TouchPhase.Ended:
            isDragging = false;
            stopSlowly = true;
            Debug.Log("end");
            break;
    }

if (isDragging) {
    // Something that uses the chosen direction...
    theSpeed = new Vector3(-direction.x, direction.y, 0.0F);
    avgSpeed = Vector3.Lerp(avgSpeed, theSpeed, Time.deltaTime * 5);
} else {
    if(stopSlowly) {
        Debug.Log("TESTOUTPUT");
        theSpeed = avgSpeed;
        stopSlowly = false;
    }
    float i = Time.deltaTime * lerpSpeed;
    theSpeed = Vector3.Lerp(theSpeed, Vector3.zero, i);
}

---

你的情况很令人困惑。 试试这样的

    // Handle finger movements based on touch phase.
    switch (touch.phase) {
        // Record initial touch position.
        case TouchPhase.Began:
            startPos = touch.position;
            break;

        // Determine direction by comparing the current touch position with the initial one.
        case TouchPhase.Moved:
            direction = touch.position - startPos;
            isDragging = true;
            break;

        // Report that a direction has been chosen when the finger is lifted.
        case TouchPhase.Ended:
            isDragging = false;
            stopSlowly = true;
            Debug.Log("end");
            break;
    }

if (isDragging) {
    // Something that uses the chosen direction...
    theSpeed = new Vector3(-direction.x, direction.y, 0.0F);
    avgSpeed = Vector3.Lerp(avgSpeed, theSpeed, Time.deltaTime * 5);
} else {
    if(stopSlowly) {
        Debug.Log("TESTOUTPUT");
        theSpeed = avgSpeed;
        stopSlowly = false;
    }
    float i = Time.deltaTime * lerpSpeed;
    theSpeed = Vector3.Lerp(theSpeed, Vector3.zero, i);
}

---

我现在用一些物理学来解决这个问题：

// React on User Touch Input -> Rotate gameObject
        if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) {
            // Get movement of the finger since last frame
            Vector2 touchDeltaPosition = Input.GetTouch(0).deltaPosition;

            // Add Torque to gameObject
            rb.AddTorque(camera.transform.up * -touchDeltaPosition.x/* * optionalForce*/);
            rb.AddTorque(camera.transform.right * touchDeltaPosition.y/* * optionalForce*/);
        } else if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended) {
            // throw anker, stop rotating slowly
            rb.angularDrag = 0.7f;
        }

---

此代码用于触摸输入，旋转对象+使其缓慢下降。你需要在你想要旋转的物体上有一个刚体。这里叫rb。相机是我的主相机。

我现在用一些物理来解决这个问题：

// React on User Touch Input -> Rotate gameObject
        if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) {
            // Get movement of the finger since last frame
            Vector2 touchDeltaPosition = Input.GetTouch(0).deltaPosition;

            // Add Torque to gameObject
            rb.AddTorque(camera.transform.up * -touchDeltaPosition.x/* * optionalForce*/);
            rb.AddTorque(camera.transform.right * touchDeltaPosition.y/* * optionalForce*/);
        } else if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended) {
            // throw anker, stop rotating slowly
            rb.angularDrag = 0.7f;
        }

---

此代码用于触摸输入，旋转对象+使其缓慢下降。你需要在你想要旋转的物体上有一个刚体。这里叫rb。照相机是我的主照相机。

嗨，很抱歉回答晚了。我用刚体和一些物理知识解决了这个问题。谢谢你的回答：）嗨，很抱歉回答晚了。我用刚体和一些物理知识解决了这个问题。谢谢你的回答：）