如何改变灯光效果的方向？

Question

添加一个新的bool变量，该变量将用作向前和向后两个方向之间的标记。

在剧本的顶部：

public float delay = 0.1f;

private Renderer[] renderers;
private float lastChangeTime;
private int greenIndex = 0;
private List<GameObject> objects = new List<GameObject>();

在开始

void Start()
{
  LightsEffect();
}

更新内部

void Update()
{
  // Change color each `delay` seconds
        if (Time.time > lastChangeTime + delay)
        {
            lastChangeTime = Time.time;

            // Set color of the last renderer to red
            // and the color of the current one to green
            renderers[greenIndex].material.color = Color.red;
            greenIndex = (greenIndex + 1) % renderers.Length;
            renderers[greenIndex].material.color = Color.green;
        }
}

和LightsEffect方法

private void LightsEffect()
    {
        renderers = new Renderer[objects.Count];
        for (int i = 0; i < renderers.Length; i++)
        {
            renderers[i] = objects[i].GetComponent<Renderer>();
            renderers[i].material.color = Color.red;
        }

        // Set green color to the first one
        greenIndex = 0;
        renderers[greenIndex].material.color = Color.green;
    }

我想要做的是使用一个标志来改变光线的移动方向。