rot-js/addons/game.js

A roguelike toolkit in JavaScript

let Game = {
	scheduler: null,
	engine: null,
	player: null,
	level: null,
	display: null,
	textBuffer: null,
	
	init: function() {
		window.addEventListener("load", this);
	},

	handleEvent: function(e) {
		switch (e.type) {
			case "load":
				window.removeEventListener("load", this);

				this.scheduler = new ROT.Scheduler.Speed();
				this.engine = new ROT.Engine(this.scheduler);
				this.display = new ROT.Display({fontSize:16});
				this.textBuffer = new TextBuffer(this.display);
				document.body.appendChild(this.display.getContainer());
				this.player = new Player();

				// FIXME build a level and position a player
				let level = new Level();
				let size = level.getSize();
				this._switchLevel(level);
				this.level.setEntity(this.player, new XY(Math.round(size.x/2), Math.round(size.y/2)));

				this.engine.start();
			break;
		}
	},

	draw: function(xy) {
		let entity = this.level.getEntityAt(xy);
		let visual = entity.getVisual();
		this.display.draw(xy.x, xy.y, visual.ch, visual.fg, visual.bg);
	},
	
	over: function() {
		this.engine.lock();
		// FIXME show something
	},

	_switchLevel: function(level) {
		// remove old beings from the scheduler
		this.scheduler.clear(); 

		this.level = level;
		let size = this.level.getSize();

		let bufferSize = 3;
		this.display.setOptions({width:size.x, height:size.y + bufferSize});
		this.textBuffer.configure({
			display: this.display,
			position: new XY(0, size.y),
			size: new XY(size.x, bufferSize)
		});
		this.textBuffer.clear();

		/* FIXME draw a level */
		let xy = new XY();
		for (let i=0;i<size.x;i++) {
			xy.x = i;
			for (let j=0;j<size.y;j++) {
				xy.y = j;
				this.draw(xy);
			}
		}

		/* add new beings to the scheduler */
		let beings = this.level.getBeings();
		for (let p in beings) {
			this.scheduler.add(beings[p], true);
		}
	}
}

Game.init();