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chem - npm Package Compare versions

Comparing version 0.5.0 to 0.6.0

170

doc/api.md
**Table of Contents** *generated with [DocToc](http://doctoc.herokuapp.com/)*
- [button](#button)
- [resources](#resources)
- [properties](#properties)
- [animations](#animations)
- [spritesheet](#spritesheet)
- [images](#images)
- [text](#text)
- [methods](#methods)
- [getImage(name, frameIndex)](#getimagename-frameindex)
- [events](#events)
- ['ready'](#'ready')
- ['progress' (event)](#'progress'-event)
- [vec2d](#vec2d)

@@ -12,3 +23,3 @@ - [Batch](#batch)

- [Engine](#engine)
- [methods](#methods-1)
- [methods](#methods)
- [new Engine(canvas)](#new-enginecanvas)

@@ -36,11 +47,11 @@ - [setSize(size)](#setsizesize)

- [Label](#label)
- [methods](#methods-2)
- [methods](#methods)
- [new Label(text, params)](#new-labeltext-params)
- [draw(context)](#drawcontext-1)
- [draw(context)](#drawcontext)
- [setVisible(visible)](#setvisiblevisible)
- [setZOrder(zOrder)](#setzorderzorder)
- [delete()](#delete)
- [properties](#properties-1)
- [properties](#properties)
- [pos](#pos)
- [size](#size-1)
- [size](#size)
- [scale](#scale)

@@ -61,13 +72,26 @@ - [zOrder](#zorder)

- [Sound](#sound)
- [methods](#methods-3)
- [methods](#methods)
- [new Sound(url)](#new-soundurl)
- [play()](#play)
- [stop()](#stop)
- [setVolume(value)](#setvolumevalue)
- [setPreload(value)](#setpreloadvalue)
- [setPlaybackRate(value)](#setplaybackratevalue)
- [properties](#properties)
- [currentSrc](#currentsrc)
- [volume](#volume)
- [preload](#preload)
- [playbackRate](#playbackrate)
- [maxPoolSize](#maxpoolsize)
- [duration](#duration)
- [buffered](#buffered)
- [events](#events)
- ["progress"](#progress)
- ["ready"](#ready)
- [Sprite](#sprite)
- [methods](#methods-4)
- [methods](#methods)
- [new Sprite(animationName, params)](#new-spriteanimationname-params)
- [setAnimationName(animationName)](#setanimationnameanimationname)
- [setAnimation(animation)](#setanimationanimation)
- [draw(context)](#drawcontext-2)
- [draw(context)](#drawcontext)
- [getSize()](#getsize)

@@ -87,4 +111,4 @@ - [getAnchor()](#getanchor)

- [hitTest(vec2d)](#hittestvec2d)
- [setVisible(visible)](#setvisiblevisible-1)
- [setZOrder(zOrder)](#setzorderzorder-1)
- [setVisible(visible)](#setvisiblevisible)
- [setZOrder(zOrder)](#setzorderzorder)
- [setFrameIndex(frameIndex)](#setframeindexframeindex)

@@ -94,16 +118,16 @@ - [setLoop(loop)](#setlooploop)

- [getFrameIndex()](#getframeindex)
- [delete()](#delete-1)
- [properties](#properties-2)
- [pos](#pos-1)
- [size](#size-2)
- [scale](#scale-1)
- [zOrder](#zorder-1)
- [batch](#batch-1)
- [rotation](#rotation-1)
- [delete()](#delete)
- [properties](#properties)
- [pos](#pos)
- [size](#size)
- [scale](#scale)
- [zOrder](#zorder)
- [batch](#batch)
- [rotation](#rotation)
- [loop](#loop)
- [alpha](#alpha-1)
- [id](#id-1)
- [alpha](#alpha)
- [id](#id)
- [animation](#animation)
- [animationName](#animationname)
- [events](#events-1)
- [events](#events)
- ['animationend'](#'animationend')

@@ -132,2 +156,56 @@

## resources
var resources = require('chem').resources;
### properties
#### animations
Object containing all the animation metadata, indexed by name.
#### spritesheet
Spritesheet Image.
#### images
Contains a map of your static image resources. These are in public/img.
#### text
Contains a map of your text resources. These are in public/text.
### methods
#### getImage(name, frameIndex)
Obtain a new Image object by extracting it from the spritesheet.
* `name` - the animation name to get the frame of
* `frameIndex` - defaults to `0`
### events
These are events that you can subscribe to:
```js
resources.on('eventName', function() {
// your code here
});
```
For more information see [EventEmitter](http://nodejs.org/docs/latest/api/events.html#events_class_events_eventemitter)
#### 'ready'
Emitted when all resources are loaded and you may begin utilizing them.
#### 'progress' (event)
event is an object that contains:
* `total` - total number of resources to fetch
* `complete` - how many resources have been fetched
## vec2d

@@ -529,2 +607,6 @@

#### stop()
Stops all the Audio instances in the pool.
#### setVolume(value)

@@ -538,2 +620,46 @@

#### setPlaybackRate(value)
Sets the `playbackRate` property. Same as HTML5 Audio object.
### properties
#### currentSrc
Read-only. URL of the playing sound.
#### volume
Read-only.
#### preload
Read-only.
#### playbackRate
Read-only.
#### maxPoolSize
Read/write. Defaults to 1000;
#### duration
Read only. Only valid after the 'ready' event has fired.
#### buffered
Read only. How much audio has been loaded in seconds.
### events
#### "progress"
Fired when some more audio has been buffered.
#### "ready"
Fired when the sound is done loading.
## Sprite

@@ -773,2 +899,4 @@

* `frames` - `[{size, pos}]` - both `size` and `pos` here are `Vec2d`s.
* `duration` - length in seconds of the animation
* `name` - string

@@ -775,0 +903,0 @@ #### animationName

13

doc/history.md
# History
## 0.6.0
* ability to get/set playbackRate on Sound
* ability to stop() a Sound
* Sound emits "progress" and "ready" event
* remove chem.onReady in favor of chem.resources.on('ready')
* resoures is a normal EventEmitter just like everything else
* resources has a "progress" event
* resources.bootstrap() called by auto generated code instead of chem library
* add automatic text and image resource loading via public/text/ and public/img/
available on resources.images and resources.text
* add engine.showLoadProgressBar()
## 0.5.0

@@ -4,0 +17,0 @@

8

index.js

@@ -5,4 +5,6 @@ var resources = require('./lib/resources');

vec2d: require('vec2d'),
button: require('./lib/button'),
resources: resources,
Engine: require('./lib/engine'),
button: require('./lib/button'),
Sound: require('./lib/sound'),

@@ -12,6 +14,2 @@ Sprite: require('./lib/sprite'),

Batch: require('./lib/batch'),
resources: resources,
onReady: resources.onReady,
};
resources.bootstrap();

128

lib/engine.js

@@ -50,9 +50,9 @@ var Vec2d = require('vec2d').Vec2d;

Engine.prototype.start = function(){
this.attachListeners();
this.startMainLoop();
attachListeners(this);
startMainLoop(this);
};
Engine.prototype.stop = function(){
this.stopMainLoop();
this.removeListeners();
stopMainLoop(this);
removeListeners(this);
};

@@ -72,2 +72,6 @@

Engine.prototype.showLoadProgressBar = function() {
showLoadProgressBar(this);
};
Engine.prototype.createFpsLabel = function() {

@@ -85,8 +89,7 @@ var label = new Label(this.fps, {

};
// private
Engine.prototype.startMainLoop = function(){
var self = this;
function startMainLoop(self) {
var previousUpdate = new Date();
this.mainLoopOn = true;
requestAnimationFrame(mainLoop, this.canvas);
self.mainLoopOn = true;
requestAnimationFrame(mainLoop, self.canvas);

@@ -114,10 +117,10 @@ function mainLoop(){

}
};
Engine.prototype.attachListeners = function(){
var self = this;
this.buttonStates = {};
this.btnJustPressed = {};
this.btnJustReleased = {};
}
function attachListeners(self) {
self.buttonStates = {};
self.btnJustPressed = {};
self.btnJustReleased = {};
// disable right click context menu
addListener(this.canvas, 'contextmenu', function(event){
addListener(self.canvas, 'contextmenu', function(event){
if (self.buttonCaptureExceptions[button.MouseRight]) return true;

@@ -127,4 +130,4 @@ event.preventDefault();

// mouse input
this.mousePos = new Vec2d(0, 0);
addListener(this.canvas, 'mousemove', function(event){
self.mousePos = new Vec2d(0, 0);
addListener(self.canvas, 'mousemove', function(event){
self.mousePos = new Vec2d(

@@ -135,3 +138,3 @@ (event.offsetX) != null ? event.offsetX : event.pageX - event.target.offsetLeft,

});
addListener(this.canvas, 'mousedown', function(event){
addListener(self.canvas, 'mousedown', function(event){
var buttonId = MOUSE_OFFSET + event.which;

@@ -142,5 +145,5 @@ self.buttonStates[buttonId] = true;

self.canvas.focus();
return self.bubbleEvent(event);
return bubbleEvent(self, event);
});
addListener(this.canvas, 'mouseup', function(event){
addListener(self.canvas, 'mouseup', function(event){
var buttonId;

@@ -151,6 +154,6 @@ buttonId = MOUSE_OFFSET + event.which;

self.emit('buttonup', buttonId);
return self.bubbleEvent(event);
return bubbleEvent(self, event);
});
// keyboard input
addListener(this.canvas, 'keydown', function(event){
addListener(self.canvas, 'keydown', function(event){
var buttonId = KEY_OFFSET + event.which;

@@ -160,5 +163,5 @@ self.btnJustPressed[buttonId] = !self.buttonStates[buttonId];

self.emit('buttondown', buttonId);
return self.bubbleEvent(event);
return bubbleEvent(self, event);
});
addListener(this.canvas, 'keyup', function(event){
addListener(self.canvas, 'keyup', function(event){
var buttonId = KEY_OFFSET + event.which;

@@ -168,3 +171,3 @@ self.btnJustReleased[buttonId] = self.buttonStates[buttonId];

self.emit('buttonup', buttonId);
return self.bubbleEvent(event);
return bubbleEvent(self, event);
});

@@ -175,5 +178,5 @@ function addListener(element, eventName, listener){

}
};
}
Engine.prototype.bubbleEvent = function(event) {
function bubbleEvent(self, event) {
// we need to figure out whether to bubble this key event up.

@@ -184,6 +187,6 @@ // if the button is an exception, bubble it up.

var buttonId = KEY_OFFSET + event.which;
if (this.buttonCaptureExceptions[buttonId] ||
(event.ctrlKey && this.buttonCaptureExceptions[button.KeyCtrl]) ||
(event.altKey && this.buttonCaptureExceptions[button.KeyAlt]) ||
(event.shiftKey && this.buttonCaptureExceptions[button.KeyShift]))
if (self.buttonCaptureExceptions[buttonId] ||
(event.ctrlKey && self.buttonCaptureExceptions[button.KeyCtrl]) ||
(event.altKey && self.buttonCaptureExceptions[button.KeyAlt]) ||
(event.shiftKey && self.buttonCaptureExceptions[button.KeyShift]))
{

@@ -197,4 +200,4 @@ return true;

Engine.prototype.removeListeners = function(){
this.listeners.forEach(function(listener) {
function removeListeners(self) {
self.listeners.forEach(function(listener) {
var element = listener[0];

@@ -205,8 +208,9 @@ var eventName = listener[1];

});
this.listeners = [];
};
Engine.prototype.stopMainLoop = function(){
this.mainLoopOn = false;
};
self.listeners = [];
}
function stopMainLoop(self) {
self.mainLoopOn = false;
}
function fallbackRequestAnimationFrame(cb){

@@ -216,1 +220,47 @@ window.setTimeout(cb, targetSpf * 1000);

function showLoadProgressBar(self) {
resources.on('progress', onProgress);
resources.on('ready', onReady);
self.on('draw', onDraw);
var percent = 0;
function onProgress(e) {
percent = e.total === 0 ? 1 : e.complete / e.total;
}
function onReady() {
resources.removeListener('progress', onProgress);
resources.removeListener('ready', onReady);
self.removeListener('draw', onDraw);
}
function onDraw(context) {
context.save();
context.setTransform(1, 0, 0, 1, 0, 0); // identity
// clear to black
context.fillStyle = "#000000";
context.fillRect(0, 0, self.size.x, self.size.y);
// draw a progress bar
var barRadius = Math.floor(self.size.y / 20);
var centerY = Math.floor(self.size.y / 2);
var margin = 5;
// outline
context.strokeStyle = "#ffffff";
context.lineWidth = 2;
context.strokeRect(margin, centerY - barRadius,
self.size.x - margin * 2, barRadius * 2);
// inside
context.fillStyle = "#ffffff";
var width = percent * (self.size.x - margin * 4);
context.fillRect(margin * 2, centerY - barRadius + margin,
width, barRadius * 2 - margin * 2);
// text
context.font = "18px sans-serif";
context.fillStyle = "#000000";
context.textAlign = "center";
context.textBaseline = "middle";
context.fillText("Loading... " + Math.floor(percent * 100) + "%",
margin * 2 + Math.floor(width / 2), centerY);
context.restore();
}
}

200

lib/resources.js
var vec2d = require('vec2d');
var Batch = require('batch2');
var util = require('util');
var EventEmitter = require('events').EventEmitter;
var onReadyQueue = [];
// exports at bottom because we need to set up this class before
// creating an instance
// set assetsLoaded after all assets are done loading
var assetsLoaded = false;
var spritesheetDone = false;
var animationsJsonDone = false;
var alreadyStarted = false;
util.inherits(ResourceLoader, EventEmitter);
function ResourceLoader() {
EventEmitter.call(this);
exports.bootstrap = bootstrap;
exports.onReady = onReady;
exports.animations = null;
exports.spritesheet = null;
exports.useSpritesheet = true;
exports.getImage = getImage;
function onReady(cb) {
if (assetsLoaded) {
cb();
} else {
onReadyQueue.push(cb);
}
this.ready = false;
this.text = {};
this.images = {};
this.animations = null;
this.spritesheet = null;
this.useSpritesheet = true;
}
function bootstrap(){
// don't bootstrap twice
if (alreadyStarted) return;
alreadyStarted = true;
ResourceLoader.prototype.bootstrap = function() {
bootstrap(this);
};
// give the app a chance to skip spritesheet loading
setTimeout(loadSpritesheet);
// fetch a resource from the server
ResourceLoader.prototype.fetchTextFile = fetchTextFile;
ResourceLoader.prototype.fetchImage = fetchImage;
function checkDoneLoading(){
if (spritesheetDone && animationsJsonDone) {
assetsLoaded = true;
onReadyQueue.forEach(function(cb) {
cb();
});
}
// extract an image from the spritesheet
ResourceLoader.prototype.getImage = function(name, frameIndex) {
if (frameIndex == null) frameIndex = 0;
var anim = this.animations[name];
var buffer = document.createElement('canvas');
var frame = anim.frames[frameIndex];
buffer.width = frame.size.x;
buffer.height = frame.size.y;
var context = buffer.getContext('2d');
context.drawImage(this.spritesheet,
frame.pos.x, frame.pos.y,
frame.size.x, frame.size.y,
0, 0,
frame.size.x, frame.size.y);
return buffer;
};
function bootstrap(self) {
var batch = new Batch();
if (self.useSpritesheet) {
batch.push(loadSpritesheet);
batch.push(loadAnimationsJson);
}
var name;
for (name in self.text) {
batch.push(generateLoadText(name));
}
for (name in self.images) {
batch.push(generateLoadImage(name));
}
function loadSpritesheet() {
if (!exports.useSpritesheet) {
spritesheetDone = true;
animationsJsonDone = true;
return checkDoneLoading();
}
// get the spritesheet
exports.spritesheet = new Image();
exports.spritesheet.src = "spritesheet.png";
exports.spritesheet.onload = function(){
spritesheetDone = true;
checkDoneLoading();
};
// get the animations.json file
var request = new XMLHttpRequest();
request.onreadystatechange = function(){
if (!(request.readyState === 4 && request.status === 200)) {
batch.on('progress', function(e) {
self.emit('progress', e);
});
// allow the event loop to process one time
// so that the user can get their on('ready') hook in
setTimeout(executeBatch);
function executeBatch() {
batch.end(function(err) {
if (err) {
self.emit('error', err);
return;
}
exports.animations = JSON.parse(request.responseText);
self.ready = true;
self.emit('ready');
});
}
function loadAnimationsJson(cb) {
fetchImage("spritesheet.png", function(err, img) {
if (err) return cb(err);
self.spritesheet = img;
cb();
});
}
function loadSpritesheet(cb) {
fetchTextFile("animations.json", function(err, text) {
if (err) return cb(err);
self.animations = JSON.parse(text);
// cache some values so don't have to compute them all the time
for (var name in exports.animations) {
var anim = exports.animations[name];
for (var name in self.animations) {
var anim = self.animations[name];
anim.duration = anim.delay * anim.frames.length;

@@ -75,25 +104,56 @@ anim.name = name;

}
animationsJsonDone = true;
checkDoneLoading();
cb();
});
}
function generateLoadText(name) {
var path = self.text[name];
return function(cb) {
fetchTextFile(path, function(err, contents) {
if (err) return cb(err);
self.text[name] = contents;
cb();
});
};
request.open("GET", "animations.json", true);
request.send();
}
function generateLoadImage(name) {
var path = self.images[name];
return function(cb) {
fetchImage(path, function(err, img) {
if (err) return cb(err);
self.images[name] = img;
cb();
});
};
}
}
function getImage(name, frameIndex){
if (frameIndex == null) frameIndex = 0;
var anim = exports.animations[name];
var buffer = document.createElement('canvas');
var frame = anim.frames[frameIndex];
buffer.width = frame.size.x;
buffer.height = frame.size.y;
var context = buffer.getContext('2d');
context.drawImage(exports.spritesheet,
frame.pos.x, frame.pos.y,
frame.size.x, frame.size.y,
0, 0,
frame.size.x, frame.size.y);
return buffer;
function fetchImage(path, cb) {
var img = new Image();
img.src = path;
img.onload = function(){
cb(null, img);
};
}
function fetchTextFile(path, cb) {
var request = new XMLHttpRequest();
request.onreadystatechange = onReadyStateChange;
request.open("GET", path, true);
try {
request.send();
} catch (err) {
cb(err);
}
function onReadyStateChange() {
if (request.readyState !== 4) return;
if (Math.floor(request.status / 100) === 2) {
cb(null, request.responseText);
return;
}
cb(new Error(request.status + ": " + request.statusText));
}
}
module.exports = new ResourceLoader();

75

lib/sound.js

@@ -0,4 +1,9 @@

var EventEmitter = require('events').EventEmitter;
var util = require('util');
module.exports = Sound;
function Sound(src) {
EventEmitter.call(this);
this.currentSrc = src;

@@ -9,10 +14,11 @@ this.audioPool = [new Audio(src)];

this.preload = "auto";
this.playbackRate = 1;
this.buffered = 0;
this.duration = null;
this.applySettings();
applySettings(this);
progressHooks(this);
}
util.inherits(Sound, EventEmitter);
function audioReadyToPlay(audio) {
return audio.currentTime === 0 || audio.currentTime === audio.duration;
}
Sound.prototype.play = function() {

@@ -28,3 +34,3 @@ for (var i = 0; i < this.audioPool.length; ++i) {

var newAudio = new Audio(this.currentSrc);
this.applySettingsToAudio(newAudio);
applySettingsToAudio(this, newAudio);
newAudio.play();

@@ -35,5 +41,13 @@ this.audioPool.push(newAudio);

Sound.prototype.stop = function() {
for (var i = 0; i < this.audioPool.length; ++i) {
var audio = this.audioPool[i];
audio.pause();
audio.currentTime = 0;
}
};
Sound.prototype.setVolume = function(vol) {
this.volume = vol;
this.applySettings();
applySettings(this);
};

@@ -43,14 +57,47 @@

this.preload = preload;
this.applySettings();
applySettings(this);
};
Sound.prototype.applySettings = function() {
for (var i = 0; i < this.audioPool.length; ++i) {
this.applySettingsToAudio(this.audioPool[i]);
Sound.prototype.setPlaybackRate = function(rate) {
this.playbackRate = rate;
applySettings(this);
};
function applySettings(self) {
for (var i = 0; i < self.audioPool.length; ++i) {
applySettingsToAudio(self, self.audioPool[i]);
}
}
Sound.prototype.applySettingsToAudio = function(audio) {
audio.volume = this.volume;
audio.preload = this.preload;
function applySettingsToAudio(self, audio) {
audio.volume = self.volume;
audio.preload = self.preload;
audio.playbackRate = self.playbackRate;
audio.defaultPlaybackRate = self.playbackRate;
}
function progressHooks(self) {
var audio = self.audioPool[0];
audio.addEventListener("progress", onProgress, false);
audio.load();
var complete = false;
function onProgress() {
try {
// sometimes I get Index Size Error: DOM Exception 1
self.buffered = audio.buffered.end(audio.buffered.length - 1);
} catch (err) {
return;
}
self.duration = audio.duration;
self.emit('progress');
if (! complete && self.buffered >= self.duration) {
complete = true;
self.emit('ready');
}
}
}
function audioReadyToPlay(audio) {
return audio.currentTime === 0 || audio.currentTime === audio.duration;
}

45

lib/sprite.js

@@ -73,32 +73,43 @@ var Vec2d = require('vec2d').Vec2d;

};
Sprite.prototype.getTopLeft = function(){
return this.pos.minus(this.getAnchor());
};
Sprite.prototype.getBottomRight = function(){
return this.getTopLeft().plus(this.getSize());
};
Sprite.prototype.getTop = function(){
return this.getTopLeft().y;
};
Sprite.prototype.getLeft = function(){
return this.getTopLeft().x;
};
Sprite.prototype.getBottom = function(){
return this.getBottomRight().y;
};
Sprite.prototype.getRight = function(){
return this.getBottomRight().x;
};
Sprite.prototype.setLeft = function(x){
this.pos.x = x + this.animation.anchor.x;
};
Sprite.prototype.setRight = function(x){
this.pos.x = x - this.animation.anchor.x;
};
Sprite.prototype.setTop = function(y){
this.pos.y = y + this.animation.anchor.y;
};
Sprite.prototype.setBottom = function(y){
this.pos.y = y - this.animation.anchor.y;
};
Sprite.prototype.isTouching = function(sprite){

@@ -112,2 +123,3 @@ var a_tl = this.getTopLeft();

};
Sprite.prototype.hitTest = function(pt) {

@@ -118,2 +130,3 @@ var tl = this.getTopLeft();

};
Sprite.prototype.setVisible = function(visible){

@@ -130,2 +143,3 @@ this.visible = visible;

};
Sprite.prototype.setZOrder = function(zOrder){

@@ -140,2 +154,3 @@ if (this.batch != null) {

};
Sprite.prototype.setFrameIndex = function(frameIndex){

@@ -147,2 +162,3 @@ var secondsPassed = frameIndex * this.animation.delay;

};
Sprite.prototype.setLoop = function(loop){

@@ -152,10 +168,11 @@ this.loop = loop;

this._loop = this.loop == null ? this.animation.loop : this.loop;
this.setUpInterval();
setUpInterval(this);
};
Sprite.prototype.setAnimationStartDate = function(animationStartDate){
this.animationStartDate = animationStartDate;
this.setUpInterval();
setUpInterval(this);
};
Sprite.prototype.getFrameIndex = function(){
var ref$, ref1$;
var now = new Date();

@@ -166,5 +183,8 @@ var totalTime = (now - this.animationStartDate) / 1000;

} else {
return (ref$ = Math.floor(totalTime / this.animation.delay)) < (ref1$ = this.animation.frames.length - 1) ? ref$ : ref1$;
var timeElapsedFrame = Math.floor(totalTime / this.animation.delay);
var lastFrame = this.animation.frames.length - 1;
return Math.min(timeElapsedFrame, lastFrame);
}
};
Sprite.prototype['delete'] = function(){

@@ -174,14 +194,13 @@ if (this.batch) this.batch.remove(this);

};
// private
Sprite.prototype.setUpInterval = function(){
var self = this;
if (this.interval) this.interval.cancel();
var _schedule = this._loop ? schedule : wait;
function setUpInterval(self) {
if (self.interval) self.interval.cancel();
var _schedule = self._loop ? schedule : wait;
var now = new Date();
var timeSinceStart = (now - this.animationStartDate) / 1000;
var duration = this.animation.duration - timeSinceStart;
this.interval = _schedule(duration, function(){
var timeSinceStart = (now - self.animationStartDate) / 1000;
var duration = self.animation.duration - timeSinceStart;
self.interval = _schedule(duration, function(){
return self.emit('animationend');
});
};
}

@@ -188,0 +207,0 @@ function wait(sec, cb) {

5

package.json

@@ -5,3 +5,3 @@ {

"author": "Andrew Kelley <superjoe30@gmail.com>",
"version": "0.5.0",
"version": "0.6.0",
"main": "index.js",

@@ -14,4 +14,5 @@ "license": "MIT",

"dependencies": {
"vec2d": "~0.1.1"
"vec2d": "~0.1.1",
"batch2": "~0.5.0"
}
}

49

README.md

@@ -5,2 +5,4 @@ # chem

Inspired by [pyglet](http://www.pyglet.org/).
## Features

@@ -22,2 +24,4 @@

* Convenient API for keyboard and mouse input.
* Bootstraps the resource loading process and optionally provides a basic
loading progress bar.

@@ -73,6 +77,9 @@ ## Usage

var v = chem.vec2d;
var canvas = document.getElementById("game");
var engine = new chem.Engine(canvas);
engine.showLoadProgressBar();
engine.start();
canvas.focus();
chem.onReady(function () {
var canvas = document.getElementById("game");
var engine = new chem.Engine(canvas);
chem.resources.on('ready', function () {
var batch = new chem.Batch();

@@ -130,4 +137,2 @@ var boom = new chem.Sound('sfx/boom.ogg');

});
engine.start();
canvas.focus();
});

@@ -216,2 +221,8 @@ ```

* `autoBootstrap` - set this to `false` if you do not want public/bootstrap.js
to be auto generated.
If you leave the `spritesheet` export undefined, no spritesheet will be
generated or used at runtime.
### Use any "compile to JS" language

@@ -233,3 +244,20 @@

chem.onReady(function() {
// Next, locate your canvas:
var canvas = document.getElementById("the-canvas-id");
// Create the main game engine:
var engine = new Engine(canvas);
// Display a nice loading progress bar while we serve assets:
// (it automatically goes away once loading is complete)
engine.showLoadProgressBar()
// Start the main loop:
engine.start()
// Focus the canvas so that keyboard input works:
canvas.focus()
// Finally, wait until resources are done loading:
chem.resources.on('ready', function() {
// Now you can go for it. All asssets are loaded.

@@ -245,7 +273,10 @@ });

### Not Using a Spritesheet
### Resource Locations
If you omit the spritesheet object in your chemfile, no spritesheet files
will be generated. Be sure to set `chem.useSpritesheet = false` in your app code to avoiding attempting to load the missing resources.
Text files placed in public/text/ will be available in the `chem.resources.text`
object once the 'ready' event has fired.
Image files placed in public/img/ will be available in the
`chem.resources.images` object once the 'ready' event has fired.
### Reference API Documentation

@@ -252,0 +283,0 @@

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