如何让玩家在管道和铁轨上“滑动”？

Question

我需要创建打滑或滑倒效果。我想像日落过载一样创建打滑或滑倒效果：

http://i.stack.imgur.com/vmx8f.jpg

当主角在电缆和铁轨上滑倒时。如何创建相同的结果？在 C# 中。观看此视频：https://www.youtube.com/watch?v=zXjNkoQQPls（从 1.20 分钟到 1.25）。我已经创建了这个代码：-OnTrigger-（适用于电缆）

使用 UnityEngine；使用 System.Collections；公共课 OnTriggerEnterScroll : MonoBehaviour {

/*ISTRUZIONI : Inserire questo Script all'interno dell'Elemento che entra in contatto con il Trigger */

public Transform target; // Player
AutoMove AutoMoveScript; // richiamo variabili Script AutoMove

// Use this for initialization
void Start () {
    AutoMoveScript =  target.GetComponent<AutoMove>(); // Richiano componente AutoMove
}

// Update is called once per frame
void Update () {
    Vector3 targetDir = target.position - transform.position;
    Debug.Log(targetDir);
}

void OnTriggerEnter(Collider other) { // Quando il player entra nel Trigger
    if(other.collider.name == "MainCharacter"){

            AutoMoveScript.MoveSpeed = 8;  // Cambio variabile di Velocita'
            AutoMoveScript.activeAutoMoveW = true; // Cambio variabile di scorrimento
            AutoMoveScript.activeAutoMoveS = false; // Cambio variabile di scorrimento


    }

}

void OnTriggerStay(Collider other) { // Quando il player e' nel Trigger
    if(other.collider.name == "MainCharacter"){
        if(Input.GetKey(KeyCode.W)){

            AutoMoveScript.activeAutoMoveW = true; // Cambio variabile di scorrimento
            AutoMoveScript.activeAutoMoveS = false; // Cambio variabile di scorrimento

        }

        if(Input.GetKey(KeyCode.S)){

            AutoMoveScript.activeAutoMoveS = true; // Cambio variabile di scorrimento
            AutoMoveScript.activeAutoMoveW = false; // Cambio variabile di scorrimento

        }

    }

}

void OnTriggerExit(Collider other) { // Quando il player esce nel Trigger

    if(other.collider.name == "MainCharacter"){

            AutoMoveScript.MoveSpeed = 8; // Cambio variabile di Velocita'
            AutoMoveScript.activeAutoMoveS = false; // Cambio variabile di scorrimento
            AutoMoveScript.activeAutoMoveW = false; // Cambio variabile di scorrimento

    }

}
}

-AutoMove-（应用于主要角色）

使用 UnityEngine；使用 System.Collections；公共类 AutoMove ： 单一行为{

/*ISTRUZIONI : Inserire questo Script all'interno del Player */

public bool activeAutoMoveW = false; //variabile controllo Forward
public bool activeAutoMoveS = false; //variabile controllo Back

public int MoveSpeed = 8;   //variabile velocità di scorrimento
public bool activeSelect = false; //variabile controllo Select


// Use this for initialization
void Start () {


}

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

    if(activeAutoMoveW == true)
    {
        transform.Translate(Vector3.forward * MoveSpeed * Time.fixedDeltaTime, Space.World); // Scorrimento in avari
    }

    if(activeAutoMoveS == true)
    {
        transform.Translate(Vector3.back * MoveSpeed * Time.fixedDeltaTime, Space.World); // Scorrimento in  dietro
    }

    if(Input.GetKeyDown(KeyCode.Q) && activeSelect == false)
    {
        MoveSpeed = 1; // Cambio variabile di scorrimento
        activeSelect = true;  // Cambio variabile Slect

    }else if(Input.GetKeyDown(KeyCode.Q) && activeSelect == true)
    {
        MoveSpeed = 8; // Cambio variabile di scorrimento
        activeSelect = false; // Cambio variabile Slect

    }

}   }

系统创建了滑倒效果，但不知道角色的方向是什么。

Answer 1

如果我理解正确，问题是当你想滑倒时你不知道前进是什么。像您在示例中那样在世界空间中使用 Vector3.forward 的问题在于，无论对象如何定向，它都将始终是相同的方向。在对象空间中使用 Vector3.forward 的问题是它对整个对象都是一样的，所以如果你有一个像你在图片中那样弯曲的对象，它也不会工作。

您需要一些方法来了解对象是如何弯曲的，一个简单的例子是沿着轨道手动放置一个 vector3 点数组，然后您可以通过 points[i+1]-points 计算方向[i] 与您之间的两点。假设您并不总是从铁路的起点开始，您还需要一些方法来找到您在哪些点之间可能并不容易。

像这样的

public class AutoMove : MonoBehaviour 
{
  public Vector3[] points;
  private int currentIndex = -1;
  ...

  void Update()
  {
    if(activeAutoMoveW == true)
    {
        Vector3 direction = points[i+1]-points[i];
        transform.position += direction * MoveSpeed * Time.fixedDeltaTime;

        if((transform.position - points[i+1]).sqrMagnitude < 0.1f) //check if we are at the next point
            currentIndex++;
    }
    if(activeAutoMoveS == true)
    {
        Vector3 direction = points[i+1]-points[i];
        transform.position -= direction * MoveSpeed * Time.fixedDeltaTime;

        if((transform.position - points[i]).sqrMagnitude < 0.1f) //check if we are at the next point
            currentIndex--;
    }

    if(currentIndex < 0 || currentIndex > points.Length) //check if we are at either edge of the line and then end the slip
    {
        activeAutoMoveW = false;
        activeAutoMoveS = false;
    {

    ...
  }

  public void BeginSlip(Vector3[] points) //called from the object when you want to begin the slip
  {
    this.points = points; //get the slip points from the object you slip on

    //find the closest point
    float minDist = float.MaxValue;
    for(int i=0; i<points.Length; i++)
    {
      float currentDist = (transform.position - points[i]).sqrMagnitude;
      if(currentDist  < minDist)
      {
        minDist = currentDist;
        currentIndex = i;
      }
    }
  }
}