巡视点反转

Question

我正在开发一个小的Unity游戏，目前正在使用一系列的巡逻点来移动一些物体。这是我或多或少使用的代码：

transform.position = Vector3.MoveTowards (transform.position, patrolPoints [currentPoint].position, moveSpeed * Time.deltaTime);

我觉得自己很傻，也许只是烧坏了大脑，但我该如何扭转这一点，让它从巡逻中的最高点到最低点？我试过了，但没有用：

transform.position = Vector3.MoveTowards (transform.position, patrolPoints [currentPoint - 1].position, moveSpeed * Time.deltaTime);

Answer 1

你的问题很模棱两可，但我会尝试回答。

假设您的意思是如何向前和向后浏览patrolPoints列表

在脚本的顶部定义您的变量。

//List of patrolpoints
public Transform[] patrolPoints;
//To go forwards or backwards
public bool forwards = true;
//Current position
public int currentPoint = 0;

然后，在您的Update()函数中，我们可以使用您提供的代码。

        float moveSpeed = 5.0f;
    transform.position = Vector3.MoveTowards(transform.position, patrolPoints[currentPoint].position, moveSpeed * Time.deltaTime);

但是，我们需要一些方法来循环遍历这些位置，因此在Update()中前面代码之后编写

        //Check if the agent has reached the patrol point
    if(transform.position == patrolPoints[currentPoint].position)
    {
        //Check if going forwards and has not reached last patrol
        if (forwards && currentPoint != patrolPoints.Length - 1)
            currentPoint++;
        //Check if going backwards and has not reached first patrol point
        else if (!forwards && currentPoint != 0)
            currentPoint--;
    }

然后将前进和后退布尔值更改为前进和后退。Alternatively如果您想直接返回到开始巡视点，只需使用代码(在Update()中)：

        float moveSpeed = 5.0f;
    transform.position = Vector3.MoveTowards(transform.position, patrolPoints[0].position, moveSpeed * Time.deltaTime);

它使用0作为索引。

编辑:如果您希望在到达end之后向后转发，只要在currentPoint到达lastPoint时将变量切换为false currentPoint即可。因此，对于，update函数将为：

    void Update()
{
    float moveSpeed = 5.0f;
    transform.position = Vector3.MoveTowards(transform.position, patrolPoints[currentPoint].position, moveSpeed * Time.deltaTime);

    //Check if the agent has reached the patrol point
    if(transform.position == patrolPoints[currentPoint].position)
    {
        //Check if going forwards and has not reached last patrol
        if (forwards && currentPoint != patrolPoints.Length - 1)
            currentPoint++;
        //Check if going forwards and has reached the last patrol
        if (forwards && currentPoint == patrolPoints.Length - 1)
            forwards = false;
        //Check if going backwards and has not reached first patrol point
        else if (!forwards && currentPoint != 0)
            currentPoint--;
        //And to go back if reached back to the start
        else if (!forwards && currentPoint == 0)
            forwards = true;
    }
}

Answer 2

感谢您的回复。我知道我来晚了点，哈哈。但是，是的，这是有效的，并帮助我取得进步，谢谢。