相机切换机制

Question

作为我研究项目的一部分，我一直在测试相机切换机制。

到目前为止，我可以通过下面的代码注意到两件事。在我应用此代码之前，默认情况下会显示主摄像头。但是，现在默认显示最后一个摄像头，即使我禁用了脚本，我也不确定如何解决这个问题。此外，下面的代码在 camera[currentCameraIndex - 1].enabled = false; 的第 46 行抛出一个 ArrayIndexOutofRangeException；在 else 子句中。

你们中的任何人可能知道发生了什么以及我如何解决它吗？

非常感谢！

using UnityEngine;
using System.Collections;

public class CameraController : MonoBehaviour
{
public Camera[] cameras;
private int currentCameraIndex;

// Use this for initialization
void Start()
{
    currentCameraIndex = 0;

    //Turn all cameras off, except the first default one
    for (int i = 1; i < cameras.Length; i++)
    {
        cameras[i].enabled = false;
    }

    //If any cameras were added to the controller, enable the first one
    if (cameras.Length > 0)
    {
        cameras[0].enabled = true;
        Debug.Log("Camera with name: " + cameras[0].name + ", is now enabled");
    }
}

// Update is called once per frame
void Update()
{
    //If the c button is pressed, switch to the next camera
    //Set the camera at the current index to inactive, and set the next one in the array to active
    //When we reach the end of the camera array, move back to the beginning or the array.
    if (Input.GetKeyDown(KeyCode.C))
    {
        currentCameraIndex++;
        Debug.Log("C button has been pressed. Switching to the next camera");
        if (currentCameraIndex < cameras.Length)
        {
            cameras[currentCameraIndex - 1].enabled = false;
            cameras[currentCameraIndex].enabled = true;
            Debug.Log("Camera with name: " + cameras[currentCameraIndex].name + ", is now enabled");
        }
        else
        { 
            cameras[currentCameraIndex - 1].enabled = false;
            currentCameraIndex = 0;
            cameras[currentCameraIndex].enabled = true;
            Debug.Log("Camera with name: " + cameras[currentCameraIndex].name + ", is now enabled");
        }
    }
}
}

Answer 1

代码没有问题，刚刚统一检查了。但我建议你检查一下相机是否有任何价值

if (Input.GetKeyDown(KeyCode.C))
{
    if (cameras.Length > 0)
    {
        DoStuff();
    }
}