FRAG
Framework for Realtime Ad-hoc Games
Tutorial outline
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Motivation
FRAG based game worlds
FRAG structure
Core FRAG components
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Problem
• Distributed games
• Ad-hoc networking
• True Peer-To-Peer (no dedicated servers)
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Solution
FRAG
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Object management
Network communication
Distributed control
Load balancing
Game state replication
Peer management
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Peer-to-Peer network
Peer 2
Peer 1
No dedicated server!
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Peer 3
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World overview
Object A
Peer 2 Focus
Peer 1 Focus
Object B
Object C
Peer 3 Focus
World
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State replication
Object A
Object A
Object B
Object C
Peer 1
Object B
Object A
Object C
Object B
Peer 2
Object C
Peer 3
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FRAG structure
Game
Manager
Object
Manager
Object A
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Object B
Peer
Manager
Remote
Event
Dispatcher
Peer 2
Connection
Local
Event
Dispatcher
Peer 1
Peer 3
Connection
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Game Manager
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Handles game creation and joining
Initializes the game world
Transmits initial world copies to joining peers
Serves as interface between FRAG and the
underlying network/ARENA layer (peer discovery
and connection)
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Object Manager
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Maintains objects hashtable and object states
Handles incoming state updates
Generates state updates for controlled objects
Chooses which objects to control
Resolves controller conflicts between peers
Provides object lists for the visualization
components
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Information Sources
• FRAG source code (still undocumented) in the
ARENA CVS repository, module frag
• Me ([email protected])
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