This is a specialized tilemap database used by a MMO game demo I'm working on.
The API is a simple key/value system with special characteristics.
- You can only have 256 unique objects in the database.
- every instance can exist any number of times with x,y,z coordinates.
- 1mb planes (1024x1024x1) are allocated dynamically for infinite mapping.
- The entire database is saved at once in atomic writes.
- Saves are throttled to not happen more than a certain interval.
- SIGINT and SIGTERM are caught and the data is flushed before exiting.
The public api is very simple:
// load the library
var WorldDB = require('world-db');
// Load or create a library with 1024x1024 planes and save throttling
// to no more than once each every 10 seconds.
var myworld = WorldDB('world.db', 1024, 10000);
// Objects can be anything, but can't be more than 256 of them.
var water = {name:"Water", props:[]};
var tree = {name:"tree", hp: 43};
// Set some objects
myworld.set(0, 2, 0, wall);
myworld.set(0, 3, 1, water);
// String are singletons and can use the literals inline
myworld.set(0, 3, 1, "wall");
// Loading stuff back
var value = myworld(0, 3, 1); // "wall"
If anyone wants to use this, then let me know your interest. Till then I'm going to assume it's only used by me.
Copyright (c) 2010 Tim Caswell tim@creationix.com
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