A fast, easy to use, free, and community supported 2D game engine
Status:
Converting Chipmunk JS API into an Object Oriented JS API.
Instead of:
cp.space.setGravity( g );This:
space.setGravity( g ;The Chipmunk JS API will be 100% compatible with the Chipmunk-JS project. So you will be able to port your physics game to the web for free ( https://github.com/josephg/chipmunk-js )
yes, what you can do is to edit the file js_bindings_core.mm, and edit the runScript method.
You will see that it loads the script from the "bundle". If you change that code, you can tell it to load the script from a custom path, and then add a button in your game that just reloads the script.
Another missing functionality, is a way to reset the JS VM.
@DanieL:
Xcode as a JS editor sucks.
Try with sublime, or mac vim, or your favorite text editor:
http://www.sublimetext.com/
http://code.google.com/p/macvim/
Update:
Object Oriented Chipmunk API is automatically generated.
Status:
- basic tests are working, but I know it will crash on when the garbage collector runs. I need to root the objects that are added to the space.
DanieL
Member
I'm having error when using cc.Rect.CCRectContainsPoint
TypeError: cc.Rect is undefined
How should I do? I am following the reference: http://www.cocos2d-x.org/reference/html5-js
Thanks in advance!
DanieL
Member
@riq: I've been thinking about a situation. With the game written in cocos2d + JS, there is a way to work with Game Center? I know I can connect, as this can be done in the delegate, but when I call a script I can send the score? Can I call a function that is in delegate? Another question is about scenes, I can have scenes in cocos2d and others in JS?
Sorry the questions, but I've read all the material that you did on the cocos2d + JS and I'm really very interested and I'm really wanting to understand how all this will work.
Thank you!
@DanieL:
Yes, to create a rect you should use:
var r = cc.rect(x,y,w,h);And the rect API was not finished, but it should be something like this:
var bool2 = r.rectContainsPoint( point );Could you open a ticket, or better, could you send me a patch with it ? :)
I am using the "JS Bindings" project to report bugs/issues for the js bindings:
https://github.com/zynga/jsbindings
The function should be added to this file:
https://github.com/zynga/jsbindings/blob/master/src/js/jsb_constants_cocos2d.js#L202
Hi,
are there any known issues with targeted touch dispatcher? According to HTML5 docs, it should work like this:
cc.TouchDispatcher.addTargetedDelegate(this, 0, false);
But that says that cc.TouchDispatcher is undefined.
I'm coming from native Obj-C and this is my first time dealing with JS, so I may be doing something wrong :)
@igalic:
For the moment, the Targeted Touches are not supported on the JS bidnings. But they work OK on cocos2d-html5.
A good rule of thumb is:
If the functionality is present on the JS Tests, Moon Warriors or Watermelon with Me (all of them bundled with cocos2d v2.1-beta2) then it should work. Else, most probably it is not supported yet.
Also, I highly recommend to base your game on the "Watermelon with Me" code. It follows the cocos2d JS Bindings best practices.
Thanks, I've now switched to non-targeted version. I managed to get my prototype running in the browser (originally written in JS for iPhone), I'm amazed at how this all is coming together :)
I have a few questions about porting and compatibility:
- how are cc.associateWithNative handled? The html version didn't seem to mind, although their code uses this._super()
- is there a recommended way to get both versions running in a compatible way? What I did was create a main-iphone.js file where I put the 'run' function, and then have a separate main.js file which extends cc.Application and runs it from there. Main game logic is in a separate third file used by both of those. It's mainly working except that I couldn't get both versions to run the same way, i.e. the html-5 version:
var ConnectScene = cc.Scene.extend({
onEnter:function () {
this.associateWithNative(this, cc.Scene);
var layer = new MainMenuLayer();
this.addChild(layer);
}
});// and then director.runWithScene(new ConnectScene()) in main.js
The iPhone version gave me an error here:
jsb: ERROR in jsval_to_nsobject: Error obtaining proxySo I had to use the 'run' function from the sample. Not a big deal but I don't really understand the issue.
I had to add
cc.Scene.extend = cc.Class.extend;
to jsb constants file.
After that I got it working. But for some reason, it's as if the anchor for the html5 version is not in the middle of the canvas - my whole game is centered around lower-left corner, and I haven't been able to find a way to fix that.
(EDIT: I found the problem eventually - from my main menu I was running replaceScene({a layer}) instead of {the scene} which I prepared. It worked fine on the iPhone but not in html. Now I have the whole prototype working in browser, woohoo! :) )
In any case, thanks for the great work!
@oskiller:
A few things to keep in mind:
- compile it in "release" mode. The "debug" mode is super slow.
- the game was not tuned for performance. In fact, it doesn't follow many of the best practices.
- To learn the "js bindings" best practices, please take a look at the "Watermelon With Me" source code.
On an iPhone 4S on release mode Moon Warriors runs at 40FPS. When the GC is called, the FPS drops a bit.
@igalic:
I started to write info about subclassing here:
https://github.com/cocos2d/cocos2d-iphone/wiki/JS-Bindings-Programming-Guide
Currently it doesn't explain how to do it with "Class.extend", but basically what you have todo is:
var AboutLayer = cc.Layer.extend({
ctor:function () {
// This is compatible with cocos2d-html5.
// When using JS-Bindings, it associates the native object with a JS object
// when using cocos2d-html5, it does nothing
cc.associateWithNative( this, cc.Layer );
},
init:function () {
if (this._super()) {
// do whatever you want
}
return true;
},
});The game Moon Warriors ( https://github.com/ricardoquesada/MoonWarriors ) shows how to subclass.
@oskiller:
As I mentioned, "Moon Warriors" does not follow the "js bindings" best practices. It creates unnecessary objects, and it doesn't reuse objects when needed.
Please, take a look at "Watermelon" code and performance. It runs at 60 FPS on iPad 1 / iPod touch 4, and it has no problems with the GC.
@rsanchezsaez: yes. you can use JS Bindings for Linux/Windows by running them on top of cocos2d-x (and not on top of cocos2d-iphone).
cocos2d-x for windows is stable. I don't know how stable is for linux (it could be stable or not... it is that I just don't know).
Jason A
Member
@noocell
I don't know what the long term plans are for which classes will be provided in JS out of the box, but for now you'd have to wrap the relevant classes yourself with the JSB tools (as you would for any native classes you wrote yourself)
@riq
is there a pre built project somewhere setup for testing js code on cocos2d-iphone & cocos2d-html5 at the same time?
I've set up my own, and getting things working has required writing shims for both projects in a few places. If there's some
sort of official 'compat' project I'd rather use that and have a single place to send fixes etc.
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