Still not get it, How to display cameras movement speed value in inspector?

Question

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class SwitchCameras : MonoBehaviour
{
    [Header("Cameras Init")]
    public Camera[] cameras;
    public Vector3[] originalPosition;

    [Space(5)]

    [Header("Cameras Switch")]
    public string currentCameraName;
    public Vector3[] lastCameraPosition;
    public float cameraSpeed;

    [Space(5)]

    [Header("Cameras Target")]
    public float nextTargetDistance;
    public Vector3 nextTargetPosition;
    public Transform nextTarget;

    private int currentCamera = 0;

    void Start()
    {
        cameras = Camera.allCameras;
        lastCameraPosition = new Vector3[cameras.Length];

        if (cameras.Length >= 1)
        {
            originalPosition = new Vector3[cameras.Length];
            for (int i = 0; i < cameras.Length; i++)
            {
                originalPosition[i] = cameras[i].transform.position;
            }
        }

        if (cameras.Length == 1)
        {
            Debug.LogError("Need more then 1 camera for switching..");
        }
        else
        {
            Debug.Log("Found " + cameras.Length + " cameras");
        }

        for (int i = 0; i < cameras.Length; i++)
        {
            cameras[i].enabled = false;
        }
        cameras[0].enabled = true;
        currentCameraName = cameras[0].name;
    }

    void LateUpdate()
    {
        if (Input.GetKeyDown(KeyCode.C))
        {
            cameras[currentCamera].enabled = false;

            if (++currentCamera == cameras.Length)
                currentCamera = 0;

            cameras[currentCamera % cameras.Length].enabled = true;
            cameraSpeed = (cameras[currentCamera].transform.position - lastCameraPosition[currentCamera]).magnitude / Time.deltaTime;
            lastCameraPosition[currentCamera] = cameras[currentCamera].transform.position;
            currentCameraName = cameras[currentCamera].name;

            Debug.Log(cameras[currentCamera].name + " Last position " + cameras[currentCamera].transform.position);
        }
    }
}

Two things i want to do:

1. When running the game display the movement speed of cameras[0] in the Update i want to see the speed in real time not only once like still.

2. Then when i click on C to switch between the cameras display each camera in real time the movement speed. Now when i click on C and switch between the cameras i see still speed value and not real time running value of the speed.

Answer 1

So I think you want to move the speed calculation out of your key-check if-statement. So your late update function should look something like this:

void LateUpdate()
{
    if (Input.GetKeyDown(KeyCode.C))
    {
        cameras[currentCamera].enabled = false;

        if (++currentCamera == cameras.Length)
            currentCamera = 0;

        cameras[currentCamera].enabled = true;
        currentCameraName = cameras[currentCamera].name;
    }

    cameraSpeed = (cameras[currentCamera].transform.position - lastCameraPosition[currentCamera]).magnitude / Time.deltaTime;
    lastCameraPosition[currentCamera] = cameras[currentCamera].transform.position;

    Debug.Log(cameras[currentCamera].name + " Last position " + cameras[currentCamera].transform.position);
}

So here, when the key is pressed, we only update the camera index and name, and leave the speed calculation out of there. The actual speed calculation is now done each frame instead of only when a key is pressed.