LionEngine - The Web Site

Introduction

Network game tools are provided by the lionengine-network module, giving an oriented network game type development with specific classes and architecture.

In this section we will see how to use these main tools, and the way of we should use them.

---

Chat

What is the most primary thing we always need in a multiplayer game ? What are the first data exchanged ? Dialog between player of course ! Let's see how is working the integrated chat system.

• Define a simple message type: code

  This is here where network message type are defined.

• Implement a basic message decoder: code

  For each message type, we need to handle its decoder from the type.

• Implement the chat by using the default one: code

  We can here listen to network connection in order to send special messages.

• Create a simple client: code

  Represents the player connected through the network.

• Implement the world base and its two versions, one for the client and the other for the server side: World
  • WorldServer
  • WorldClient

  This is how should work the world over the network. Usually, clients send their data to the server, which updates the world, and then send the updates to the clients. Client can also update the world by themselves in order to reduce bandwidth usage.

• Define a scene that will allow us to test the chat: code
• Program test: code

  You can now test the chat by starting two applications, one as server and the other as client. You can also add new clients.

  • Complete example
• Output:

---

Connected world

Here we will see how to connect world in order to handle many clients with the same data.

• Create the map environment:
  • TileCollision
  • Map
• Create the entity environment:
  • EntityType
  • EntityState
  • EntityCollision
  • EntityCollisionTileCategory
  • Entity
  • Mario
  • Goomba
  • FactoryEntity

  This will allow us to create some entity for the example.

• Implement the message handling:
  • MessageEntityElement
  • MessageEntity
  • MessageDecoder
  • MessageFactory
• Implement the chat: code

  We can here listen to network connection in order to send special messages.

• Implement the world base and its two versions, one for the client and the other for the server side: World
  • WorldServer
  • WorldClient

  This is how should work the world over the network. Usually, clients send their data to the server, which updates the world, and then send the updates to the clients. Client can also update the world by themselves in order to reduce bandwidth usage.

• Implement the client input: code

  Gameplay action will be sent here to the server.

• Define a scene that will handle both server & client (by changing a simple boolean): code
• Program test: code

  You can now play with other player to the same game, as everybody shares the same data.

  • Complete example
  • And its resources
• Output: