Portal

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

public class Portal : MonoBehaviour
{
    private const string PLAYER_TAG = "Player";

    [SerializeField] Transform otherPortal;

    [SerializeField] private Camera myCamera;

    public Camera GetMyCamera()
    {
        return myCamera;
    }

    [SerializeField] private Transform myRenderPlane;
    [SerializeField] private Transform myCollider;

    // public Transform GetMyCollider() => myCollider;
    public Transform GetMyCollider()
    {
        return myCollider;
    }

    [SerializeField] Material material;

    private GameObject player;
    private PortalCamera portalCamera;
    private PortalTeleport portalTeleport;

    private void Awake()
    {
        portalCamera = myCamera.GetComponent<PortalCamera>();
        portalTeleport = myCollider.GetComponent<PortalTeleport>();
        player = GameObject.FindGameObjectWithTag(PLAYER_TAG);

        //// jeżeli kamera jest jako 1 dziecko obiektu gracza
        //portalCamera.playerCamera = player.transform.GetChild(0);

        //// wykorzystujemy główną kamera - oznaczoną tagiem "MainCamera"
        //portalCamera.playerCamera = Camera.main.transform;

        portalCamera.playerCamera = player.GetComponentInChildren<Camera>().transform;
        portalCamera.otherPortal = otherPortal.transform;
        portalCamera.portal = transform;

        portalTeleport.player = player.transform;
        portalTeleport.receiver = otherPortal.GetComponent<Portal>().GetMyCollider();

        myRenderPlane.GetComponent<Renderer>().material = Instantiate(material);
        if (myCamera.targetTexture != null)
        {
            myCamera.targetTexture.Release();
        }
        myCamera.targetTexture = new RenderTexture(Screen.width, Screen.height, 24);

        float myAngle = transform.localEulerAngles.y % 360;
        portalCamera.SetMyAngle(myAngle);
    }

    private void Start()
    {
        myRenderPlane.GetComponent<Renderer>().material.mainTexture =
            otherPortal.GetComponent<Portal>().GetMyCamera().targetTexture;
    }
}