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2021 Happy New Year!

We finally made it through 2020 and we are on to a new year. Happy New Year to all our viewers, subscribers, and supporters! Thank you all so much for your support over the years. We hope 2021 will be our year to get this channel rolling. Please show your support by subscribing to our channel and giving this video a thumbs up.

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Among Us Multiplayer – Scene Navigation (PUN 2 in Unity)

For this lesson on how to create Among Us in Unity using Photon, I will show you how to create Scene Navigation so you can transition from the main menu scene to the waiting room scene and then to the game scene. This is an important feature that we need to cover before we can show you other game mechanics like how to pick the imposter.

To do this we will have the quick start menu load the player first into the waiting room scene. Then when all the players have loaded in the host of the game will have a button that will begin a timer. When the timer reaches zero it will then load all the players into the game scene.

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WaitingRoomController.cs

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

public class WaitingRoomController : MonoBehaviour
{
    PhotonView myPV;

    [SerializeField] float timeToStart;
    float timerToStart;
    bool readyToStart;

    [SerializeField] GameObject StartButton;
    [SerializeField] Text countDownDisplay;


    [SerializeField] int nextLevel;



    // Start is called before the first frame update
    void Start()
    {
        myPV = GetComponent<PhotonView>();
        timerToStart = timeToStart;

        
    }

    // Update is called once per frame
    void Update()
    {
        StartButton.SetActive(PhotonNetwork.IsMasterClient);
        
        
            if(readyToStart)
            {
                timerToStart -= Time.deltaTime;
                countDownDisplay.text = ((int)timerToStart).ToString();
            }
            else
            {
                timerToStart = timeToStart;
                countDownDisplay.text = "";
            }
        if (PhotonNetwork.IsMasterClient)
        {
            if (timerToStart <= 0)
            {
                timerToStart = 100;
                PhotonNetwork.AutomaticallySyncScene = true;
                PhotonNetwork.LoadLevel(nextLevel);
            }
        }
        
    }

    public void Play()
    {
        if(PhotonNetwork.IsMasterClient)
        {
            myPV.RPC("RPC_Play", RpcTarget.All);
        }
    }
    
    [PunRPC]
    void RPC_Play()
    {
        readyToStart = !readyToStart;
    }
}
using Photon.Chat;
using Photon.Pun;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PhotonChatManager : MonoBehaviour, IChatClientListener
{
    #region Setup

    [SerializeField] GameObject joinChatButton;
    ChatClient chatClient;
    bool isConnected;
    [SerializeField] string username;

    public void UsernameOnValueChange(string valueIn)
    {
        username = valueIn;
    }

    public void ChatConnectOnClick()
    {
        isConnected = true;
        chatClient = new ChatClient(this);
        //chatClient.ChatRegion = "US";
        chatClient.Connect(PhotonNetwork.PhotonServerSettings.AppSettings.AppIdChat, PhotonNetwork.AppVersion, new AuthenticationValues(username));
        Debug.Log("Connenting");
    }

    #endregion Setup

    #region General

    [SerializeField] GameObject chatPanel;
    string privateReceiver = "";
    string currentChat;
    [SerializeField] InputField chatField;
    [SerializeField] Text chatDisplay;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (isConnected)
        {
            chatClient.Service();
        }

        if (chatField.text != "" &amp;&amp; Input.GetKey(KeyCode.Return))
        {
            SubmitPublicChatOnClick();
            SubmitPrivateChatOnClick();
        }
    }

    #endregion General

    #region PublicChat

    public void SubmitPublicChatOnClick()
    {
        if (privateReceiver == "")
        {
            chatClient.PublishMessage("RegionChannel", currentChat);
            chatField.text = "";
            currentChat = "";
        }
    }

    public void TypeChatOnValueChange(string valueIn)
    {
        currentChat = valueIn;
    }

    #endregion PublicChat

    #region PrivateChat

    public void ReceiverOnValueChange(string valueIn)
    {
        privateReceiver = valueIn;
    }

    public void SubmitPrivateChatOnClick()
    {
        if (privateReceiver != "")
        {
            chatClient.SendPrivateMessage(privateReceiver, currentChat);
            chatField.text = "";
            currentChat = "";
        }
    }

    #endregion PrivateChat

    #region Callbacks

    public void DebugReturn(DebugLevel level, string message)
    {
        //throw new System.NotImplementedException();
    }

    public void OnChatStateChange(ChatState state)
    {
        if(state == ChatState.Uninitialized)
        {
            isConnected = false;
            joinChatButton.SetActive(true);
            chatPanel.SetActive(false);
        }
    }

    public void OnConnected()
    {
        Debug.Log("Connected");
        joinChatButton.SetActive(false);
        chatClient.Subscribe(new string[] { "RegionChannel" });
    }

    public void OnDisconnected()
    {
        isConnected = false;
        joinChatButton.SetActive(true);
        chatPanel.SetActive(false);
    }

    public void OnGetMessages(string channelName, string[] senders, object[] messages)
    {
        string msgs = "";
        for (int i = 0; i &lt; senders.Length; i++)
        {
            msgs = string.Format("{0}: {1}", senders[i], messages[i]);

            chatDisplay.text += "\n" + msgs;

            Debug.Log(msgs);
        }

    }

    public void OnPrivateMessage(string sender, object message, string channelName)
    {
        string msgs = "";

        msgs = string.Format("(Private) {0}: {1}", sender, message);

        chatDisplay.text += "\n " + msgs;

        Debug.Log(msgs);
        
    }

    public void OnStatusUpdate(string user, int status, bool gotMessage, object message)
    {
        throw new System.NotImplementedException();
    }

    public void OnSubscribed(string[] channels, bool[] results)
    {
        chatPanel.SetActive(true);
    }

    public void OnUnsubscribed(string[] channels)
    {
        throw new System.NotImplementedException();
    }

    public void OnUserSubscribed(string channel, string user)
    {
        throw new System.NotImplementedException();
    }

    public void OnUserUnsubscribed(string channel, string user)
    {
        throw new System.NotImplementedException();
    }

    #endregion Callbacks
}

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Among Us Multiplayer – Sync Kill RPC (PUN 2 in Unity)

For this lesson on how to network Among Us with Photon in Unity, I will show you how to sync the kill mechanic with an RPC. This will make it so when the imposter kills a player it happens across all clients and a body prefab is instantiated across the network as well.

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AU_PlayerController.cs

using Photon.Pun;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.InputSystem;

public class AU_PlayerController : MonoBehaviour, IPunObservable
{
    [SerializeField] bool hasControl;
    public static AU_PlayerController localPlayer;
    

    //Components
    Rigidbody myRB;
    Animator myAnim;
    Transform myAvatar;
    //Player movement
    [SerializeField] InputAction WASD;
    Vector2 movementInput;
    [SerializeField] float movementSpeed;

    float direction = 1;
    //Player Color
    static Color myColor;
    SpriteRenderer myAvatarSprite;

    //Player Hat
    static Sprite myHatSprite;
    SpriteRenderer myHatHolder;

    //Role
    [SerializeField] bool isImposter;
    [SerializeField] InputAction KILL;

    List<AU_PlayerController> targets;
    [SerializeField] Collider myCollider;

    bool isDead;

    [SerializeField] GameObject bodyPrefab;

    public static List<Transform> allBodies;

    List<Transform> bodiesFound;

    [SerializeField] InputAction REPORT;
    [SerializeField] LayerMask ignoreForBody;

    //Interaction
    [SerializeField] InputAction MOUSE;
    Vector2 mousePositionInput;
    Camera myCamera;
    [SerializeField] InputAction INTERACTION;
    [SerializeField] LayerMask interactLayer;

    //Networking
    PhotonView myPV;
    [SerializeField] GameObject lightMask;
    [SerializeField] lightcaster myLightCaster;



    private void Awake()
    {
        KILL.performed += KillTarget;
        REPORT.performed += ReportBody;
        INTERACTION.performed += Interact;
    }

    private void OnEnable()
    {
        WASD.Enable();
        KILL.Enable();
        REPORT.Enable();
        MOUSE.Enable();
        INTERACTION.Enable();

    }

    private void OnDisable()
    {
        WASD.Disable();
        KILL.Disable();
        REPORT.Disable();
        MOUSE.Disable();
        INTERACTION.Disable();

    }


    // Start is called before the first frame update
    void Start()
    {
        myPV = GetComponent<PhotonView>();

        if(myPV.IsMine)
        {
            localPlayer = this;
        }
        myCamera = transform.GetChild(1).GetComponent<Camera>();
        targets = new List<AU_PlayerController>();
        myRB = GetComponent<Rigidbody>();
        myAnim = GetComponent<Animator>();
        myAvatar = transform.GetChild(0);
        myAvatarSprite = myAvatar.GetComponent<SpriteRenderer>();
        myHatHolder = transform.GetChild(0).GetChild(1).GetComponent<SpriteRenderer>();
        if (!myPV.IsMine)
        {
            myCamera.gameObject.SetActive(false);
            lightMask.SetActive(false);
            myLightCaster.enabled = false;
            return;
        }
        if (myColor == Color.clear)
            myColor = Color.white;
        myAvatarSprite.color = myColor;

        if(allBodies == null)
        {
            allBodies = new List<Transform>();
        }
        bodiesFound = new List<Transform>();

        if (myHatSprite != null)
            myHatHolder.sprite = myHatSprite;
    }

    // Update is called once per frame
    void Update()
    {
        myAvatar.localScale = new Vector2(direction, 1);

        if (!myPV.IsMine)
            return;

        movementInput = WASD.ReadValue<Vector2>();
        myAnim.SetFloat("Speed", movementInput.magnitude);
        if (movementInput.x != 0)
        {
            direction = Mathf.Sign(movementInput.x);
            
        }
        

        if(allBodies.Count > 0)
        {
            BodySearch();
        }

        if(REPORT.triggered)
        {
            if (bodiesFound.Count == 0)
                return;
            Transform tempBody = bodiesFound[bodiesFound.Count - 1];
            allBodies.Remove(tempBody);
            bodiesFound.Remove(tempBody);
            tempBody.GetComponent<AU_Body>().Report();
        }

        mousePositionInput = MOUSE.ReadValue<Vector2>();
        
    }

    private void FixedUpdate()
    {
        if (!myPV.IsMine)
            return;
        myRB.velocity = movementInput * movementSpeed;
    }

    public void SetColor(Color newColor)
    {
        myColor = newColor;
        if (myAvatarSprite != null)
        {
            myAvatarSprite.color = myColor;
        }
    }

    public void SetHat(Sprite newHat)
    {
        myHatSprite = newHat;
        myHatHolder.sprite = myHatSprite;
    }

    public void SetRole(bool newRole)
    {
        isImposter = newRole;
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.tag == "Player")
        {
            AU_PlayerController tempTarget = other.GetComponent<AU_PlayerController>();
            if (isImposter)
            {
                if (tempTarget.isImposter)
                    return;
                else
                {
                    targets.Add(tempTarget);
                    
                }
            }
        }
    }

    private void OnTriggerExit(Collider other)
    {
        if (other.tag == "Player")
        {
            AU_PlayerController tempTarget = other.GetComponent<AU_PlayerController>();
            if (targets.Contains(tempTarget))
            {
                    targets.Remove(tempTarget);
            }
        }
    }

    void KillTarget(InputAction.CallbackContext context)
    {
        if (!myPV.IsMine)
            return;
        if (!isImposter)
            return;

        if (context.phase == InputActionPhase.Performed)
        {
            if (targets.Count == 0)
                return;
            else
            {
                if (targets[targets.Count - 1].isDead)
                    return;
                transform.position = targets[targets.Count - 1].transform.position;
                //targets[targets.Count - 1].Die();
                targets[targets.Count - 1].myPV.RPC("RPC_Kill", RpcTarget.All);
                targets.RemoveAt(targets.Count - 1);
            }
        }
    }


    [PunRPC]
    void RPC_Kill()
    {
        Die();
    }

    public void Die()
    {
        if (!myPV.IsMine)
            return;

        //AU_Body tempBody = Instantiate(bodyPrefab, transform.position, transform.rotation).GetComponent<AU_Body>();
        AU_Body tempBody = PhotonNetwork.Instantiate(Path.Combine("PhotonPrefabs", "AU_Body"), transform.position, transform.rotation).GetComponent<AU_Body>();
        tempBody.SetColor(myAvatarSprite.color);

        isDead = true;

        myAnim.SetBool("IsDead", isDead);
        gameObject.layer = 9;
        myCollider.enabled = false;
    }

    void BodySearch()
    {
        foreach(Transform body in allBodies)
        {
            RaycastHit hit;
            Ray ray = new Ray(transform.position, body.position - transform.position);
            Debug.DrawRay(transform.position, body.position - transform.position, Color.cyan);
            if(Physics.Raycast(ray, out hit, 1000f, ~ignoreForBody))
            {
                
                if (hit.transform == body)
                {
                    Debug.Log(hit.transform.name);
                    Debug.Log(bodiesFound.Count);
                    if (bodiesFound.Contains(body.transform))
                        return;
                    bodiesFound.Add(body.transform);
                }
                else
                {
                    
                    bodiesFound.Remove(body.transform);
                }
            }
        }
    }

    private void ReportBody(InputAction.CallbackContext obj)
    {
        if (bodiesFound == null)
            return;
        if (bodiesFound.Count == 0)
            return;
        Transform tempBody = bodiesFound[bodiesFound.Count - 1];
        allBodies.Remove(tempBody);
        bodiesFound.Remove(tempBody);
        tempBody.GetComponent<AU_Body>().Report();
    }

    void Interact(InputAction.CallbackContext context)
    {
        if (context.phase == InputActionPhase.Performed)
        {
            //Debug.Log("Here");
            RaycastHit hit;
            Ray ray = myCamera.ScreenPointToRay(mousePositionInput);
            if (Physics.Raycast(ray, out hit,interactLayer))
            {
                if (hit.transform.tag == "Interactable")
                {
                    AU_Interactable temp = hit.transform.GetComponent<AU_Interactable>();
                    temp.PlayMiniGame();
                }

            }
           
        }
        
    }

    public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
    {
        if (stream.IsWriting)
        {
            stream.SendNext(direction);
        }
        else
        {
            this.direction = (float)stream.ReceiveNext();
        }
    }
}
using Photon.Chat;
using Photon.Pun;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PhotonChatManager : MonoBehaviour, IChatClientListener
{
    #region Setup

    [SerializeField] GameObject joinChatButton;
    ChatClient chatClient;
    bool isConnected;
    [SerializeField] string username;

    public void UsernameOnValueChange(string valueIn)
    {
        username = valueIn;
    }

    public void ChatConnectOnClick()
    {
        isConnected = true;
        chatClient = new ChatClient(this);
        //chatClient.ChatRegion = "US";
        chatClient.Connect(PhotonNetwork.PhotonServerSettings.AppSettings.AppIdChat, PhotonNetwork.AppVersion, new AuthenticationValues(username));
        Debug.Log("Connenting");
    }

    #endregion Setup

    #region General

    [SerializeField] GameObject chatPanel;
    string privateReceiver = "";
    string currentChat;
    [SerializeField] InputField chatField;
    [SerializeField] Text chatDisplay;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (isConnected)
        {
            chatClient.Service();
        }

        if (chatField.text != "" &amp;&amp; Input.GetKey(KeyCode.Return))
        {
            SubmitPublicChatOnClick();
            SubmitPrivateChatOnClick();
        }
    }

    #endregion General

    #region PublicChat

    public void SubmitPublicChatOnClick()
    {
        if (privateReceiver == "")
        {
            chatClient.PublishMessage("RegionChannel", currentChat);
            chatField.text = "";
            currentChat = "";
        }
    }

    public void TypeChatOnValueChange(string valueIn)
    {
        currentChat = valueIn;
    }

    #endregion PublicChat

    #region PrivateChat

    public void ReceiverOnValueChange(string valueIn)
    {
        privateReceiver = valueIn;
    }

    public void SubmitPrivateChatOnClick()
    {
        if (privateReceiver != "")
        {
            chatClient.SendPrivateMessage(privateReceiver, currentChat);
            chatField.text = "";
            currentChat = "";
        }
    }

    #endregion PrivateChat

    #region Callbacks

    public void DebugReturn(DebugLevel level, string message)
    {
        //throw new System.NotImplementedException();
    }

    public void OnChatStateChange(ChatState state)
    {
        if(state == ChatState.Uninitialized)
        {
            isConnected = false;
            joinChatButton.SetActive(true);
            chatPanel.SetActive(false);
        }
    }

    public void OnConnected()
    {
        Debug.Log("Connected");
        joinChatButton.SetActive(false);
        chatClient.Subscribe(new string[] { "RegionChannel" });
    }

    public void OnDisconnected()
    {
        isConnected = false;
        joinChatButton.SetActive(true);
        chatPanel.SetActive(false);
    }

    public void OnGetMessages(string channelName, string[] senders, object[] messages)
    {
        string msgs = "";
        for (int i = 0; i &lt; senders.Length; i++)
        {
            msgs = string.Format("{0}: {1}", senders[i], messages[i]);

            chatDisplay.text += "\n" + msgs;

            Debug.Log(msgs);
        }

    }

    public void OnPrivateMessage(string sender, object message, string channelName)
    {
        string msgs = "";

        msgs = string.Format("(Private) {0}: {1}", sender, message);

        chatDisplay.text += "\n " + msgs;

        Debug.Log(msgs);
        
    }

    public void OnStatusUpdate(string user, int status, bool gotMessage, object message)
    {
        throw new System.NotImplementedException();
    }

    public void OnSubscribed(string[] channels, bool[] results)
    {
        chatPanel.SetActive(true);
    }

    public void OnUnsubscribed(string[] channels)
    {
        throw new System.NotImplementedException();
    }

    public void OnUserSubscribed(string channel, string user)
    {
        throw new System.NotImplementedException();
    }

    public void OnUserUnsubscribed(string channel, string user)
    {
        throw new System.NotImplementedException();
    }

    #endregion Callbacks
}