Question

如何创建速度从点A移到点B的线渲染器？

public GameObject gameObject1;          // Reference to the first GameObject
     public GameObject gameObject2;          // Reference to the second GameObject

     private LineRenderer line;                           // Line Renderer

     // Use this for initialization
     void Start () {
         // Add a Line Renderer to the GameObject
         line = GetComponent<LineRenderer>();
         // Set the width of the Line Renderer
         line.SetWidth(0.0012F, 0.0012F);
     }

     // Update is called once per frame
     void Update () {
        line.SetPosition(0, new Vector3(gameObject1.transform.position.x,gameObject1.transform.position.y,gameObject1.transform.position.z));
        line.SetPosition(1, new Vector3(gameObject2.transform.position.x,gameObject2.transform.position.y,gameObject2.transform.position.z));
     }

Answer 1

我宁愿使用Coroutine，例如（假设两个对象同时不改变位置）

// in seconds
public float duration = 1;

private bool isDoingLine;

private void Start()
{
    // Add a Line Renderer to the GameObject
     line = GetComponent<LineRenderer>();
     // Set the width of the Line Renderer
     line.SetWidth(0.0012F, 0.0012F);
     line.positionCount = 2;
     line.SetPosition(0, gameObject1.transform.position);
     line.SetPosition(1, gameObject1.transform.position);

     DoLine();
}

public void DoLine()
{
    if(!isDoingLine) StartCoroutine(LineRoutine());
}

IEnumerator LineRoutine() 
{
     isDoingLine = true;

     line.SetPosition(0, gameObject1.transform.position);

     var timePassed = 0f;
     while(timePassed < duration)
     {
         var factor = timePassed / duration;
         // optionally add ease-in ease-out
         //factor = Mathf.SmoothStep(0, 1, factor);

         line.SetPosition(1, Vector3.Lerp(gameObject1.transform.position, gameObject2.transform.position, factor));

         timePassed += Mathf.Min(Time.deltaTime, duration - timePassed);
         yield return null;
     }

     // when done just in case set the final position fix
     line.SetPosition(1, gameObject2.transform.position);

     isDoingLine = false;
 }

使用Vector3.Lerp在两个位置之间进行插值。

这里真的不需要btw通过new Vector3。 Vector3是struct，因此任何赋值或参数传递都始终使用副本。

创建速度从点A到点B的线渲染器？

1 个答案: