MoonWarriors - Javascript question

cocos2d-x JavaScript
#1

Hi,

I’m reading the code of MoonWarriors to learn how to use JS to write a Cocos2D-X game sandbox; Sorry if this question is more about JS than CC2D-x!

As I open GameLayer for instance, I see that functions can be added in three different ways. I try to understand the added value of each approach…

First approach I see is in the extend parameter:
`var GameLayer = cc.Layer.extend({
processEvent:function( event ) {
//…
},

// …
}`

The second is on that GameLayer (global?) variable:
GameLayer.create = function () { //...
Is this like creating a Class method in Java - Using a common set of data whatever the calling instance is?
BTW, Is this GameLayer a variable/instance, a “class”?

Third approach is about adding “stuff” the the prototype:
GameLayer.prototype.addEnemy = function (enemy,z,tag){

Am I right to understand this is like an instance method in Java or ObjC?

Thanks…
J.

#2

1st,3ird way, it is member function
2end way, it is static function

you could try to learn javascript basic content first

#3

Hi,

Thanks for your answer, the clarification is very helpful. I’ve always been using the verbose prototype approach and got confused by seeing all 3 different approaches.

Now I see that Sprite extends cc.Class.
What framework / source code handles the extend method in the case of CC2D-x? And where is that cc.Class defined pleaase?

Thanks,
J.

#4

in cocos2d-x src/cocos2d/platform/CCClass.js, you could see how to implement the extend method.
you could search any keyword in windows box easily, the file almost start with “CC” prefix

#5

Hey thanks a lot Huang, you’ve helped me well on this!

Have a good one,
J.