unity-networking

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Chinese

Unity Networking - Multiplayer Game Development

Unity 网络开发 - 多人游戏制作

Overview

概述

Multiplayer networking for Unity using Netcode for GameObjects, Mirror, or Photon frameworks.

Foundation Required:

unity-csharp-fundamentals

(TryGetComponent, FindAnyObjectByType, null-safe coding)

Core Topics:

Client-server architecture
State synchronization
Lag compensation
RPC (Remote Procedure Calls)
Network variables
Matchmaking

使用Netcode for GameObjects、Mirror或Photon框架实现Unity多人游戏网络功能。

必备基础：

unity-csharp-fundamentals

（TryGetComponent、FindAnyObjectByType、空安全编码）

核心主题:

客户端-服务器架构
状态同步
延迟补偿
RPC（远程过程调用）
网络变量
匹配机制

Quick Start (Unity Netcode)

快速入门（Unity Netcode）

csharp

using Unity.Netcode;

public class Player : NetworkBehaviour
{
    private NetworkVariable<int> mHealth = new NetworkVariable<int>(100);

    public override void OnNetworkSpawn()
    {
        if (IsOwner)
        {
            // Only owner can control
            HandleInput();
        }

        mHealth.OnValueChanged += OnHealthChanged;
    }

    [ServerRpc]
    void TakeDamageServerRpc(int damage)
    {
        mHealth.Value -= damage;
    }

    [ClientRpc]
    void ShowDamageEffectClientRpc()
    {
        // Visual feedback on all clients
    }
}

csharp

using Unity.Netcode;

public class Player : NetworkBehaviour
{
    private NetworkVariable<int> mHealth = new NetworkVariable<int>(100);

    public override void OnNetworkSpawn()
    {
        if (IsOwner)
        {
            // Only owner can control
            HandleInput();
        }

        mHealth.OnValueChanged += OnHealthChanged;
    }

    [ServerRpc]
    void TakeDamageServerRpc(int damage)
    {
        mHealth.Value -= damage;
    }

    [ClientRpc]
    void ShowDamageEffectClientRpc()
    {
        // Visual feedback on all clients
    }
}

Network Architecture

网络架构

Authoritative Server: Server validates all actions (competitive)
Client Authority: Clients control own entities (cooperative)
Relay Servers: NAT traversal for peer-to-peer
Dedicated Servers: Professional hosting

权威服务器：服务器验证所有操作（竞技类游戏适用）
客户端授权：客户端控制自身实体（合作类游戏适用）
中继服务器：通过NAT穿透实现点对点连接
专用服务器：专业级托管服务

Synchronization Patterns

同步模式

Transform Sync: Position, rotation interpolation
Network Variables: Automatic state replication
RPCs: Remote method calls
Ownership: Who can modify what

Transform同步：位置、旋转插值
网络变量：自动状态复制
RPC：远程方法调用
所有权管理：谁可以修改哪些对象

Reference Documentation

参考文档

Netcode for GameObjects Fundamentals

Netcode for GameObjects 基础

Core networking concepts:

NetworkManager setup and configuration
Client-server architecture patterns
State synchronization and RPCs

核心网络概念:

NetworkManager设置与配置
客户端-服务器架构模式
状态同步与RPC

Best Practices

最佳实践

Server authority: Prevent cheating
Client prediction: Smooth movement
Interpolation: Handle lag gracefully
Bandwidth optimization: Delta compression
Test with network simulation: Latency, packet loss

服务器权威：防止作弊
客户端预测：实现流畅移动
插值处理：优雅应对延迟
带宽优化：增量压缩
网络模拟测试：模拟延迟、丢包情况