MultiPlay.io is a realtime cross-platform gaming platform that allows you to edit the games as they are being played on mobile and web devices. We've been using MongoDB now since the inception of the project, where we quickly needed a data store to handle synchronization between our players entering and leaving a 3d chatroom with guns game. Since then we've gone on to add standard gaming features such as leader boards, real time game analytics, game replays and some not so standard features such as modifying the 3d assets and textures of the games as they're being played. In this talk, we'd like to share with you the tricks and techniques we've used to handle our ever changing datasets and assets store to scale across different versions of the game clients and platforms. Which will help you gain insight into building a cross-platform rapid prototyping environment of your own too.

1. Realtime User Generated
Multi-Platform Multiplayer 3D Gaming
[Warning: May contain LIVE DEMO]
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2. Hello
• Going Multiplayer
• Going Multi-Platform
• Why use MongoDB?
• How we use MongoDB?
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3. Common Multiplayer Web Stack
MongoDB
NodeJS
SocketIO
Web
App
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4. • Server
• Client
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5. Maintaining State
• Saving game events for analytics
Web Server
MongoDB
App App
Shot Fired Save Event
Game Events
Collection
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6. #MongoDBdays @multiplayio

7. Gameplay Demo
http://multiplay.io/play/phonewars
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8. HTML5
Firefox
OS
Blackberry
iOS
Tizen Ubuntu
Linux
Android
Windows Mac
Windows
Phone
..but slow?
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9. C++/GPU APIs
Firefox
OS
Blackberry
iOS
Tizen Ubuntu
Linux
Android
Windows Mac
Windows
Phone
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10. Cross-Platform Proxy Multiplayer Stack
MongoDB
NodeJS
Proxy
Server Java
Server
SocketIO Sockets
JavaScript C++
Networking Networking
Logic Logic
Web Native
App App
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11. Cross-Platform Hybrid Multiplayer Stack
MongoDB
NodeJS
Sockets
DOM/Canvas App Networking
Logic Native App
App
WebGL Web
App View
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12. Hackathon Challenge
• Mongoose • Jansson • Async
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13. • JavaScript
Networking
Logic to C++
• C++
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14. Supporting Native Platforms
Device Layer Framework Layer Application Layer
Qt
Renderer
Renderer
iOS
Renderer
Engine App
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15. Supporting Direct3D
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16. Editor Demo
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17. Editing Objects
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18. Supporting Hybrid Platforms
Device Framework JavaScript Proxy JavaScript App
Qt
Renderer
Proxy
Renderer App
Renderer
iOS
Renderer
Engine WebView
..JIT?
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19. Renderer Proxy
• JavaScript
• C++
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20. Performance Issues
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21. Why MongoDB?
• Community
• Get’s out of your way
• Fun & Easy
• 10gen Education
• JSON/JavaScript
• Sharding
• Don’t fight it
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22. QUESTIONS?
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23. THANKS!
“Fast Delivery. Changed my life.
Should present again. A+++++”
- iBot5
“I wanted to be a pop star before this, but
now I just want to program JavaScript!”
- Zombie Justin B.
#MongoDBdays @multiplayio