Mirror/README.md

![Mirror Logo](https://i.imgur.com/ikP9eYs.png)

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## Mission
Mirror is a **high level** Networking API for Unity, built on top of the **low level** [Telepathy](https://github.com/vis2k/Telepathy) library.

Mirror is built [and tested](https://www.youtube.com/watch?v=mDCNff1S9ZU) for **MMO Scale** Networking by the developers of [uMMORPG](https://assetstore.unity.com/packages/templates/systems/ummorpg-51212) and [Cubica](https://cubica.net).

Mirror is optimized for **ease of use** and **probability of success**. Projects that use Mirror are small, concise and maintainable. uMMORPG was possible with <6000 lines of code. We needed a networking library that allows us to [launch our games](https://mirror-networking.com/showcase/), period.

## Architecture
With Mirror, the **Server & Client are ONE** project _(hence the name)_. Instead of having one code base for the server and one for the client, we simply use the same code for both of them.
* **[Server]** / **[Client]** tags can be used for the server-only and client-only parts
* **[Command]** s are used for Client->Server communication
* **[ClientRpc]** / **[TargetRpc]** for Server->Client communication
* **[SyncVar]** s / SyncLists are used to automatically synchronize state

_Note: Mirror is based on Unity's abandoned UNET Networking system. We fixed it up and pushed it to MMO Scale._

## Low Level Transports
* (built in) [Telepathy](https://github.com/vis2k/Telepathy): TCP
* (built in) [UNET LLAPI](https://docs.unity3d.com/Manual/UNetUsingTransport.html): UDP
* (built in) [Ninja.Websockets](https://github.com/ninjasource/Ninja.WebSockets): Websockets
* [Apathy](https://mirror-networking.com/apathy/): Native TCP
* [FizzySteam](https://github.com/Raystorms/FizzySteamyMirror/): SteamNetwork
* [Ignorance](https://github.com/SoftwareGuy/Ignorance/): ENET UDP
* [LiteNetLib4](https://github.com/MirrorNetworking/LiteNetLibTransport/) LiteNetLib UDP

## Getting Started
Download [Mirror on the Asset Store](https://assetstore.unity.com/packages/tools/network/mirror-129321), open one of the examples & press Play!

Check out our [Documentation](https://mirror-networking.com/docs/) to learn how it all works.

If you are migrating from UNET, then please check out our [Migration Guide](https://mirror-networking.com/docs/General/Migration.html). Don't panic, it's very easy and won't take more than 5 minutes.

## Funding
Mirror is free & open source software funded by Donations. If you love it, please consider supporting [Mirror on GitHub](https://github.com/sponsors/vis2k). As reward, you'll receive our [Network Profiler](https://mirror-networking.com/docs/Guides/Profiler.html?q=Profiler), priority support access and more :)

## Benchmarks
* Telepathy [1000 connections](https://github.com/vis2k/Telepathy) test
* [uMMORPG 480 CCU worst case test](https://youtu.be/mDCNff1S9ZU) (everyone broadcasting to everyone else)

## Development & Contributing
Mirror is used **in production** by multiplayer games ranging from small indie projects to large scale MMORPGs that will run for a decade or more.

10 years from now if your players encounter a networking bug and most of our contributors already moved on, someone will need to fix it. Therefore it is of utmost importance for us to follow the [KISS principle](https://en.wikipedia.org/wiki/KISS_principle) in order for our future game servers to survive.

Keeping the next decade in mind, contributing **fixes** / **tests** / **improvements** is highly appreciated while new features have a low probability of being merged.

_At this point, what we don't add to Mirror is more important than what we do add to it!_