How to disable a camera and change the texture of it?

Unity Engine
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1

Hi,

I am making an fps game, and im making a scope for my sniper rifle. Im using a render texture on my scope, which is attached to a camera on the barrel of the sniper rifle, to be able to make a nice zoom effect. However, I wanted to enable the camera when i scope in, making it show the render texture, and disable it when i unscoped, making the texture go black, for performance boosts. How would i be able to do that through script (if u can through script)?

Heres my code:

using System.Collections;
using UnityEngine;

public class ScopeIn : MonoBehaviour
{
    [Header("Booleans")]
    public bool isScoping = false;
    public bool isFiring;
    public bool ableToScope = true;
    public bool ableToSprint = true;

    [Header("FOV and Speed Settings")]
    public float transitionSpeed = 5f;
    public float defaultFOV = 60f;
    public float scopedFOV = 50f;
    public float scopeFOV = 50f;

    [Header("Position Settings")]
    public Vector3 aimPosition = new Vector3(0.5f, -0.3f, 0.7f);
    public Vector3 defaultPosition = new Vector3(0.5f, -0.5f, 0.8f);

    [Header("Prefabs")]
    public GameObject crosshair;
    public Camera fpsCamera;
    public GameObject gun;
    public Camera scopeCam;

    private Coroutine zoomCoroutine;

    void Start()
    {
        fpsCamera.fieldOfView = defaultFOV;
        gun.transform.localPosition = defaultPosition;
        scopeCam.fieldOfView = scopeFOV;
    }

    void Update()
    {
        if (Input.GetButtonDown("Fire2") && ableToScope)
        {
            Scope(true);
            GameObject.Find("ScopeCamera").GetComponent<Camera>().enabled = true;
        }
        if (Input.GetButtonUp("Fire2") && !isFiring && ableToScope)
        {
            Scope(false);
            GameObject.Find("ScopeCamera").GetComponent<Camera>().enabled = false;
        }

        // Smoothly transition the gun position
        Vector3 targetPosition = isScoping ? aimPosition : defaultPosition;
        gun.transform.localPosition = Vector3.Lerp(gun.transform.localPosition, targetPosition, Time.deltaTime * transitionSpeed);
    }

    private void Scope(bool scoping)
    {
        isScoping = scoping;
        ableToSprint = !scoping;
        crosshair.SetActive(!scoping);

        float targetFOV = scoping ? scopedFOV : defaultFOV;

        if (zoomCoroutine != null)
        {
            StopCoroutine(zoomCoroutine);
        }
        zoomCoroutine = StartCoroutine(LerpFieldOfView(fpsCamera, targetFOV, 0.15f));
    }

    private IEnumerator LerpFieldOfView(Camera targetCamera, float toFOV, float duration)
    {
        float startFOV = targetCamera.fieldOfView;
        float elapsedTime = 0f;

        while (elapsedTime < duration)
        {
            elapsedTime += Time.deltaTime;
            targetCamera.fieldOfView = Mathf.Lerp(startFOV, toFOV, elapsedTime / duration);
            yield return null;
        }
        targetCamera.fieldOfView = toFOV;
    }
}

Sorry, I’m a bit of a noob so if all the code is too much, my bad.

2

I would start with any “how to aim down sights” tutorial for Unity on Youtube.

If that doesn’t do it for you, then certainly nothing anyone here types in this little tiny text box will help either. :slight_smile:

When you work on tutorials, pay attention to every single detail:

Two steps to tutorials and / or example code:

  1. do them perfectly, to the letter (zero typos, including punctuation and capitalization)
  2. stop and understand each step to understand what is going on.

If you go past anything that you don’t understand, then you’re just mimicking what you saw without actually learning, essentially wasting your own time. It’s only two steps. Don’t skip either step.

Imphenzia: How Did I Learn To Make Games: