requirebin sketch

index.js

var inherits = require('inherits');
var Game = require('crtrdg-gameloop');
var Entity = require('crtrdg-entity');
var Keyboard = require('crtrdg-keyboard');


var canvas = document.createElement('canvas');
canvas.id = 'game';

var body = document.getElementsByTagName('body')[0];
body.appendChild(canvas);

inherits(Player, Entity);

function Player(options){
  this.position = { 
    x: options.position.x, 
    y: options.position.y 
  };

  this.size = {
    x: options.size.x,
    y: options.size.y
  };

  this.velocity = {
    x: options.velocity.x,
    y: options.velocity.y
  };
  
  this.speed = options.speed;
  this.friction = options.friction;
  this.color = options.color;
}

Player.prototype.move = function(velocity){
  this.position.x += velocity.x;
  this.position.y += velocity.y;
};

Player.prototype.checkBoundaries = function(){
  if (this.position.x <= 0){
    this.position.x = 0;
  }

  if (this.position.x >= this.game.width - this.size.x){
    this.position.x = this.game.width - this.size.x;
  }

  if (this.position.y <= 0){
    this.position.y = 0;
  }

  if (this.position.y >= this.game.height - this.size.y){
    this.position.y = this.game.height - this.size.y;
  }
};

Player.prototype.keyboardInput = function(){
  if ('A' in keyboard.keysDown){
    this.velocity.x = -this.speed;
  }

  if ('D' in keyboard.keysDown){
    this.velocity.x = this.speed;
  }

  if ('W' in keyboard.keysDown){
    this.velocity.y = -this.speed;
  }

  if ('S' in keyboard.keysDown){
    this.velocity.y = this.speed;
  }
};

var game = new Game({
  canvasId: 'game',
  width: window.innerWidth,
  height: window.innerHeight,
  backgroundColor: '#E187B8'
});

var keyboard = new Keyboard(game);

var player = new Player({
  position: { x: 10, y: 10 },
  size: { x: 10, y: 10 },
  velocity: { x: 0, y: 0 },
  speed: 3,
  friction: 0.9,
  color: '#fff'
});

player.addTo(game);

player.on('update', function(interval){
  this.keyboardInput(keyboard);

  this.move(this.velocity);
  this.velocity.x *= this.friction;
  this.velocity.y *= this.friction;

  this.checkBoundaries();
});

player.on('draw', function(draw){
  draw.fillStyle = this.color;
  draw.fillRect(this.position.x, this.position.y, this.size.x, this.size.y);
});

minified.js

function Player(e){this.position={x:e.position.x,y:e.position.y},this.size={x:e.size.x,y:e.size.y},this.velocity={x:e.velocity.x,y:e.velocity.y},this.speed=e.speed,this.friction=e.friction,this.color=e.color}require=function(e,t,n){function r(n,s){if(!t[n]){if(!e[n]){var o="function"==typeof require&&require;if(!s&&o)return o(n,!0);if(i)return i(n,!0);throw Error("Cannot find module '"+n+"'")}var a=t[n]={exports:{}};e[n][0].call(a.exports,function(t){var i=e[n][1][t];return r(i?i:t)},a,a.exports)}return t[n].exports}for(var i="function"==typeof require&&require,s=0;n.length>s;s++)r(n[s]);return r}({1:[function(e,t){var n=t.exports={};n.nextTick=function(){var e="undefined"!=typeof window&&window.setImmediate,t="undefined"!=typeof window&&window.postMessage&&window.addEventListener;if(e)return function(e){return window.setImmediate(e)};if(t){var n=[];return window.addEventListener("message",function(e){if(e.source===window&&"process-tick"===e.data&&(e.stopPropagation(),n.length>0)){var t=n.shift();t()}},!0),function(e){n.push(e),window.postMessage("process-tick","*")}}return function(e){setTimeout(e,0)}}(),n.title="browser",n.browser=!0,n.env={},n.argv=[],n.binding=function(){throw Error("process.binding is not supported")},n.cwd=function(){return"/"},n.chdir=function(){throw Error("process.chdir is not supported")}},{}],2:[function(e,t,n){(function(e){function t(e,t){if(e.indexOf)return e.indexOf(t);for(var n=0;e.length>n;n++)if(t===e[n])return n;return-1}e.EventEmitter||(e.EventEmitter=function(){});var r=n.EventEmitter=e.EventEmitter,i="function"==typeof Array.isArray?Array.isArray:function(e){return"[object Array]"===Object.prototype.toString.call(e)},s=10;r.prototype.setMaxListeners=function(e){this._events||(this._events={}),this._events.maxListeners=e},r.prototype.emit=function(e){if("error"===e&&(!this._events||!this._events.error||i(this._events.error)&&!this._events.error.length))throw arguments[1]instanceof Error?arguments[1]:Error("Uncaught, unspecified 'error' event.");if(!this._events)return!1;var t=this._events[e];if(!t)return!1;if("function"==typeof t){switch(arguments.length){case 1:t.call(this);break;case 2:t.call(this,arguments[1]);break;case 3:t.call(this,arguments[1],arguments[2]);break;default:var n=Array.prototype.slice.call(arguments,1);t.apply(this,n)}return!0}if(i(t)){for(var n=Array.prototype.slice.call(arguments,1),r=t.slice(),s=0,o=r.length;o>s;s++)r[s].apply(this,n);return!0}return!1},r.prototype.addListener=function(e,t){if("function"!=typeof t)throw Error("addListener only takes instances of Function");if(this._events||(this._events={}),this.emit("newListener",e,t),this._events[e])if(i(this._events[e])){if(!this._events[e].warned){var n;n=void 0!==this._events.maxListeners?this._events.maxListeners:s,n&&n>0&&this._events[e].length>n&&(this._events[e].warned=!0,console.error("(node) warning: possible EventEmitter memory leak detected. %d listeners added. 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e=this;this.ticker=i(this.canvas),this.ticker.on("data",function(t){e.update(t),e.draw()}),this.emit("resume")},n.prototype.update=function(e){this.emit("update",e)},n.prototype.draw=function(){this.context.fillStyle=this.backgroundColor,this.context.fillRect(0,0,this.width,this.height),this.emit("draw",this.context)}},{events:2,raf:3,inherits:4}],4:[function(e,t){t.exports="function"==typeof Object.create?function(e,t){e.super_=t,e.prototype=Object.create(t.prototype,{constructor:{value:e,enumerable:!1,writable:!0,configurable:!0}})}:function(e,t){e.super_=t;var n=function(){};n.prototype=t.prototype,e.prototype=new n,e.prototype.constructor=e}},{}],3:[function(e,t){(function(){function n(e){function t(){var r=n.now(),a=r-i;i=r,s.emit("data",a),s.paused||o(t,e)}var i=n.now(),s=new r;return s.pause=function(){s.paused=!0},s.resume=function(){s.paused=!1},o(t,e),s}t.exports=n;var r=e("events").EventEmitter,i="undefined"==typeof 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Use emitter.setMaxListeners() to increase limit.",this._events[e].length),console.trace())}this._events[e].push(t)}else this._events[e]=[this._events[e],t];else this._events[e]=t;return this},r.prototype.on=r.prototype.addListener,r.prototype.once=function(e,t){var n=this;return n.on(e,function r(){n.removeListener(e,r),t.apply(this,arguments)}),this},r.prototype.removeListener=function(e,n){if("function"!=typeof n)throw Error("removeListener only takes instances of Function");if(!this._events||!this._events[e])return this;var r=this._events[e];if(i(r)){var s=t(r,n);if(0>s)return this;r.splice(s,1),0==r.length&&delete this._events[e]}else this._events[e]===n&&delete this._events[e];return this},r.prototype.removeAllListeners=function(e){return 0===arguments.length?(this._events={},this):(e&&this._events&&this._events[e]&&(this._events[e]=null),this)},r.prototype.listeners=function(e){return this._events||(this._events={}),this._events[e]||(this._events[e]=[]),i(this._events[e])||(this._events[e]=[this._events[e]]),this._events[e]}})(e("__browserify_process"))},{__browserify_process:1}],"crtrdg-entity":[function(e,t){t.exports=e("davBSO")},{}],davBSO:[function(e,t){function n(){return this}var r=e("events").EventEmitter,i=e("inherits");t.exports=n,i(n,r),n.prototype.addTo=function(e,t){return this.game=e||{},this.game.entities||(this.game.entities=[]),this.game.entities.push(this),this.game.findEntity=this.findEntity,this.initializeListeners(),this.exists=!0,t&&t(this),this},n.prototype.initializeListeners=function(){var e=this;this.findEntity(this,function(t){t&&(e.game.on("update",function(t){e.emit("update",t)}),e.game.on("draw",function(t){e.emit("draw",t)}))})},n.prototype.remove=function(){this.exists=!1,this.removeAllListeners("update"),this.removeAllListeners("draw"),this.findEntity(this,function(e,t,n){e&&t.splice(n,1)})},n.prototype.findEntity=function(e,t){var n;n=void 0===this.game?this.entities:this.game.entities;for(var r=0;n.length>r;r++)n[r]===e&&t(!0,n,r)}},{events:2,inherits:3}],3:[function(e,t){t.exports="function"==typeof Object.create?function(e,t){e.super_=t,e.prototype=Object.create(t.prototype,{constructor:{value:e,enumerable:!1,writable:!0,configurable:!0}})}:function(e,t){e.super_=t;var n=function(){};n.prototype=t.prototype,e.prototype=new n,e.prototype.constructor=e}},{}]},{},[]);var inherits=require("inherits"),Game=require("crtrdg-gameloop"),Entity=require("crtrdg-entity"),Keyboard=require("crtrdg-keyboard"),canvas=document.createElement("canvas");canvas.id="game";var body=document.getElementsByTagName("body")[0];body.appendChild(canvas),inherits(Player,Entity),Player.prototype.move=function(e){this.position.x+=e.x,this.position.y+=e.y},Player.prototype.checkBoundaries=function(){0>=this.position.x&&(this.position.x=0),this.position.x>=this.game.width-this.size.x&&(this.position.x=this.game.width-this.size.x),0>=this.position.y&&(this.position.y=0),this.position.y>=this.game.height-this.size.y&&(this.position.y=this.game.height-this.size.y)},Player.prototype.keyboardInput=function(){"A"in keyboard.keysDown&&(this.velocity.x=-this.speed),"D"in keyboard.keysDown&&(this.velocity.x=this.speed),"W"in keyboard.keysDown&&(this.velocity.y=-this.speed),"S"in keyboard.keysDown&&(this.velocity.y=this.speed)};var game=new Game({canvasId:"game",width:window.innerWidth,height:window.innerHeight,backgroundColor:"#E187B8"}),keyboard=new Keyboard(game),player=new Player({position:{x:10,y:10},size:{x:10,y:10},velocity:{x:0,y:0},speed:3,friction:.9,color:"#fff"});player.addTo(game),player.on("update",function(){this.keyboardInput(keyboard),this.move(this.velocity),this.velocity.x*=this.friction,this.velocity.y*=this.friction,this.checkBoundaries()}),player.on("draw",function(e){e.fillStyle=this.color,e.fillRect(this.position.x,this.position.y,this.size.x,this.size.y)});

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