2018js13k/2018js13kgame.js

function Game() {
	this.theater = null;
	this.canvas = null;
	this.system = null;

	this.state = "mainmenu";
	this.stage = null;
	this.stages = [];


	this.init = function(systemObject, canvas) {
		this.theater = this;
		this.system = systemObject;	
		this.canvas = canvas;

		this.stages.push(new MainMenu());
		this.stages.push(new World());

		this.changeStage("mainmenu");
	};

	this.changeStage = function(newstage) {
		if(this.stage != null && this.stage.hasOwnProperty("end")) {
			this.stage.end();	
		}
		this.state = newstage;
		switch(this.state) {
			case "mainmenu":
				this.stage = this.stages[0];
				break;
			case "world":
				this.stage = this.stages[1];
				break;
		}
		this.stage.init(this.system, this.canvas);
	}

	this.updateDelta = function(delta, canvas){
		this.stage.updateDelta(delta, canvas);
	};

	this.draw = function(context) {
		this.stage.draw(context);
	};

	this.handleResize = function(canvas) {
		if(!this.stage.hasOwnProperty("handleResize")) { return; }
		this.stage.handleResize(canvas);
	}
};