Unity C＃Mobile Control向左滑动

Question

我用Unity和C＃做了一个3D游戏。我不知道如何通过在移动屏幕上滑动来左右对象（播放器）控制。

这是我的C＃代码：

    using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public Rigidbody rb;

    public float forwardForce = 300f;
    public float sidewaysForce = 200f;

    // Update is called once per frame
    void FixedUpdate()
    {
      rb.AddForce(0, 0, forwardForce * Time.deltaTime);

      if (Input.GetAxis("Horizontal") > 0.1)
      {
        rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0);
      }

      if (Input.GetAxis("Horizontal") < -0.1)
      {
        rb.AddForce(-sidewaysForce * Time.deltaTime, 0, 0);
      }
    }
}

Answer 1

你应该看看Mobile Touch Tutorials，Mobile Touch Manual和Input.GetTouch。简而言之：您必须触摸，存储初始位置，然后将其与当前位置进行比较。

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public Rigidbody rb;

    public float forwardForce = 300f;
    public float sidewaysForce = 200f;

    private Vector2 initialPosition;    

    // Update is called once per frame
    void Update()
    {
        // are you sure that you want to become faster and faster?
        rb.AddForce(0, 0, forwardForce * Time.deltaTime);

        if(Input.touchCount == 1)
        {
            touch = Input.GetTouch(0);

            if(touch.phase == TouchPhase.Began)
            {
                initialPosition = touch.position;
            } 
            else if(touch.phase == TouchPhase.Moved || touch.phase == TouchPhase.Stationary)
            {
                // get the moved direction compared to the initial touch position
                var direction = touch.position - initialPosition;

                // get the signed x direction
                // if(direction.x >= 0) 1 else -1
                var signedDirection = Mathf.Sign(direction.x);

                // are you sure you want to become faster over time?
                rb.AddForce(sidewaysForce * signedDirection * Time.deltaTime, 0, 0);
            }
        }
    }
}

---

注意：这总是与初始触摸位置进行比较=>在您之前不要进入另一个方向

1. 将触摸移动到另一个方向的初始位置
2. 因为你使用AddForce等待你在另一个方向增加力量的相同时间

也许您应该只与之前的触摸位置进行比较，而不是与初始位置进行比较：

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public Rigidbody rb;

    public float forwardForce = 300f;
    public float sidewaysForce = 200f;

    private Vector2 lastPosition;    

    // Update is called once per frame
    void Update()
    {
        // are you sure that you want to become faster and faster?
        rb.AddForce(0, 0, forwardForce * Time.deltaTime);

        if(Input.touchCount == 1)
        {
            touch = Input.GetTouch(0);

            if(touch.phase == TouchPhase.Began)
            {
                lastPosition = touch.position;
            }
            if(touch.phase == TouchPhase.Moved)
            {
                // get the moved direction compared to the initial touch position
                var direction = touch.position - lastPosition ;

                // get the signed x direction
                // if(direction.x >= 0) 1 else -1
                var signedDirection = Mathf.Sign(direction.x);

                // are you sure you want to become faster over time?
                rb.AddForce(sidewaysForce * signedDirection * Time.deltaTime, 0, 0);

                lastPosition = touch.position;
            }
        }
    }
}

现在你仍然需要刷相同的时间...它不会考虑刷卡距离。所以也许你应该使用它：

// get the moved direction compared to the initial touch position
var direction = touch.position - lastPosition ;

// are you sure you want to become faster over time?
rb.AddForce(sidewaysForce * direction.x * Time.deltaTime, 0, 0);

所以你刷的越多，所添加的力就越多。