c# - 我如何移动具有触摸统一方向的对象

Question

我是游戏开发的初学者。我正在开发一款游戏，我有一个球，我想通过触摸来移动它。我希望它像足球比赛一样移动，球可以沿着触摸的方向移动。

不过，眼下看来只能往前走!这是我的代码:

 public float ThroughSpped;
 public float ArchSpped;
void OnMouseDown() {

         distance = Vector3.Distance (transform.position, Camera.main.transform.position);
         Dragging = true;

     }
     public void OnMouseUp()
     {
         //Instantiate(this) ;
         this.GetComponent<Rigidbody> ().useGravity = true;



     this.GetComponent<Rigidbody> ().velocity += this.transform.forward*ThroughSpped;
         this.GetComponent<Rigidbody> ().velocity += this.transform.up*ArchSpped;
         Dragging = false;

     }

 void DraggingBall()
 {
     if (Dragging) 
     {
         Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         Vector3 raypoint = ray.GetPoint (distance);
         transform.position = Vector3.Lerp (this.transform.position, raypoint, Speed * Time.deltaTime);
         Destroy(BallPrefabClone, 1f);
     }
 }

Answer 1

可以通过touch phase获取触摸的起始位置和触摸的结束位置来计算触摸的矢量/方向

然后使用这个新向量为你的球增加力

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Vector2 startPos;
    public Vector2 direction;
    public bool directionChosen;
    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;
                    break;
            }
        }
        if (directionChosen)
        {
            // Something that uses the chosen direction...
        }
    }
}  

https://docs.unity3d.com/ScriptReference/Touch-phase.html