Basic Multiplayer Online Game with Node.js & dgt-net
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Develop online game server with Node.js & dgt-net package. dgt-net provides: packet_writer packet_reader Remote RemoteProxy client server for demo with Unity Game Engine: https://github.com/0angelic0/dgt-net_demo
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Basic Multiplayer Online Game with Node.js & dgt-net
- 1. Basic Multiplayer Online Game with Node.js & dgt-net Pisit Tangkoblarp (King) pisit@digitopolisstudio.com Lead Engineer Digitopolis Co., Ltd.
- 2. Me • CprE@1 Kmutnb • 2007 - Present Digitopolis Co., Ltd. • Junior > Senior > Lead Engineer • PC Apps & Games Mobile Apps & Games Backends & Servers Databases & Caches Pisit Tangkoblarp (King) pisit@digitopolisstudio.com
- 3. Our Story Found in 2007 2013 2015 2016 2014 App & Game Development Services
- 4. Online Game Anatomy • Client • Server • Database • Tools - Game Operations, Customer Support, Analytics, etc.
- 5. Online Game Engines • Big World Engine - http://bigworldtech.com • HeroEngine - http://www.heroengine.com • photon - https://www.photonengine.com • SmartFox - http://www.smartfoxserver.com • OMG - Debuz Co., Ltd. • Pomelo - http://pomelo.netease.com
- 6. Write your own • C, C++ • C#, Java • Node.js, Go • socket.io, dgt-net
- 7. Network Programming • 7 Layers OSI Model • Socket • IP/Port • TCP/UDP • Listen/Connect
- 8. Multithreaded Programming • Fork • Join • Lock • Asynchronous
- 9. Why Node.js? • Based on C++ • Solid Foundation: • Chrome’s V8 JavaScript Engine • Network • Asynchronous Non Blocking Model (Event Loop) • Free!
- 10. Why dgt-net? • Thin network layer on top of Node.js • Managed TCP connection & buffering • Protocol that minimize network bandwidth • Light & Fast
- 11. dgt-net • packet_writer Class • packet_reader Class
- 12. packet_writer • append_string(data) • append_uint8(data) • append_uint16(data) • append_uint32(data) • append_int8(data) • append_int16(data) • append_int32(data) • append_float(data) • append_double(data) • finish()
- 13. packet_reader • read_string() • read_uint8() • read_uint16() • read_uint32() • read_int8() • read_int16() • read_int32() • read_float() • read_double() • completed()
- 14. The Packet uint16 uint16 int8 int16 int32 float uint16 uint8 Packet Header (2 Bytes) Packet ID (2 Bytes) Binary Stream (Byte Array) Visualization 1 Byte Payload Data
- 15. The Packet 18 10001 -50 -30,000 -2,000,000,000 15.05 50,500 19 Packet Header (2 Bytes) Packet ID (2 Bytes) Binary Stream (Byte Array) Sample Data 1 Byte Payload Data
- 16. The Packet 18 10002 H e l l o W o r l d ! ! 0 Packet Header (2 Bytes) Packet ID (2 Bytes) Binary Stream (Byte Array) Sample Data Null Terminate String Payload Data
- 17. dgt-net • server.RemoteProxy Class • client.Remote Class
- 18. Remote & RemoteProxy • onConnected() • onDisconnected() • send(data) • Handle packet’s command • Hold underlying socket object
- 19. Remote & RemoteProxy • Create your own Remote & RemoteProxy classes by EXTENDS client.Remote & server.RemoteProxy classes
- 20. dgt-net • server Object • client Object
- 21. dgt-net • let server = require(‘dgt-net’).server server.setRemoteProxyClass(MyRemoteProxy) server.setPacketObject(packetServer) server.listen(port) • let client = require(‘dgt-net’).client client.setRemoteClass(MyRemote) client.setPacketObject(packetClient) client.connect(host, port)
- 22. The PacketObject Pattern • Define Packet IDs • Process received packets • Make packets
- 23. Install dgt-net • npm install dgt-net —save
- 25. What to be concerned? • Performance • Scalability • Security • Availability
- 26. What to be concerned? • Database • Caching • Monitoring • Interpolation & Prediction Movement