Detailed explanation of the misunderstandings in Unity3D multiplayer online game development

Unity3D is a powerful game development engine that can be used to develop various types of games, including multiplayer online games. However, there are some common misunderstandings to be aware of when developing multiplayer online games. This article will explain these misunderstandings in detail and provide technical solutions and code implementation.

Yes, there is a . I hope everyone can click in to exchange development experiences together!

1. Misunderstanding 1: Ignoring network delay
Network delay refers to the time required for data to travel from the sending end to the receiving end during network transmission. In multiplayer online games, network latency is a very important issue. If network latency is ignored, it may cause characters in the game to move unsmoothly, resulting in a poor player experience.

solution:

1. Use interpolation and smoothing technology: When receiving other players' position information, you can use interpolation and smoothing technology to predict their future position and make their movement smoother.
2. Design based on state synchronization: To ensure that the state seen by all players in the game is consistent, the state synchronization design pattern can be used to synchronize the state of each player to the clients of all other players.

Code:

1. Interpolation and smoothing techniques:

// 在接收到位置信息时，使用插值和平滑技术来更新位置
void UpdatePosition(Vector3 newPosition)
{
    StartCoroutine(SmoothMove(newPosition));
}

IEnumerator SmoothMove(Vector3 newPosition)
{
    float startTime = Time.time;
    float journeyLength = Vector3.Distance(transform.position, newPosition);
    while (Time.time < startTime + smoothTime)
    {
        float distCovered = (Time.time - startTime) * moveSpeed;
        float fractionOfJourney = distCovered / journeyLength;
        transform.position = Vector3.Lerp(transform.position, newPosition, fractionOfJourney);
        yield return null;
    }
    transform.position = newPosition;
}

1. State synchronization design:

// 在每个玩家的客户端上同步状态
void SyncState(PlayerState newState)
{
    // 更新玩家的状态
    playerState = newState;

    // 将状态广播给其他玩家
    photonView.RPC("UpdatePlayerState", RpcTarget.Others, newState);
}

[PunRPC]
void UpdatePlayerState(PlayerState newState)
{
    // 在其他玩家的客户端上更新玩家的状态
    playerState = newState;
}

2. Misunderstanding 2: Not considering security.
In multiplayer online games, security is an important issue. Failure to consider security may lead to cheating in the game and undermine the fairness of the game.

solution:

1. Use server-side verification: Put some important game logic on the server side for verification to ensure that players cannot gain unfair advantages by modifying client-side code.
2. Data encryption: For some sensitive data, encryption algorithms can be used to encrypt the data to ensure that the data is not stolen or tampered with during transmission.

Code:

1. Server side verification:

// 在服务器端验证玩家的移动是否合法
bool ValidateMovement(Vector3 newPosition)
{
    // 进行一些验证逻辑，例如判断移动距离是否合法
    // ...

    return isValid;
}

1. data encryption:

// 对敏感数据进行加密
string EncryptData(string data)
{
    // 使用加密算法对数据进行加密
    // ...

    return encryptedData;
}

3. Misunderstanding 3: Not considering bandwidth and server load
. In multiplayer online games, bandwidth and server load are important issues. Failure to consider bandwidth and server load may result in game performance degradation or even server crashes.

solution:

1. Use data compression: For some large amounts of repeated data, you can use data compression algorithms to compress and reduce the amount of data transmission.
2. Server load balancing: Use load balancing technology to distribute player requests to multiple servers to improve the server's processing capabilities.

Code:

1. data compression:

// 对数据进行压缩
byte[] CompressData(byte[] data)
{
    // 使用数据压缩算法对数据进行压缩
    // ...

    return compressedData;
}

1. Server load balancing:

// 使用负载均衡技术将玩家的请求分散到多个服务器上
void LoadBalance()
{
    // ...

To sum up, when developing Unity3D multiplayer online games, you need to pay attention to issues such as network latency, security, bandwidth and server load. By using technical solutions such as interpolation and smoothing technology, server-side verification, data encryption, data compression, and server load balancing, the performance and security of the game can be improved and a good player experience can be provided. I hope this article will help you understand the misunderstandings of Unity3D multiplayer online game development.