什么是Chipmunk？ （除了是物理引擎） [英] What is Chipmunk? (Apart from being a Physics Engine)

问题描述

希望这个问题不是一个愚蠢的，因为我害怕它的声音，但它可能仍然是很蠢。

我刚接触Objective-C和Cocoa。事实上，我一般是C的新手。我试图使用 Cocos2d-iPhone 实现iPhone游戏。这是我在Flash之前做的一个游戏，所以我认为这是一个很好的方式来瘦Objective C，可可和cocos2d。

我有一个很大的问题是理解为什么所有的 Chipmunk 代码看起来不同于所有的正常Objective-C东西。例如，有像

  chipmunkBody-> position.x 
  pre> 
 
 
我认为这是
 
 
 
  chipmunkBody.position.x 或者 [[chipmunkBody position] x] （可能是错误的例子）。 
 
 
 
一直以来，我一直在使用cpVect。 cpVect是相当重要的，但我不能为我的生活弄清楚如何传递它。 CGPoint，没有问题，我可以使指针，在方法中传递它们，什么不是，但第二个我使用cpVect，而是欢迎到Errorville，人口你。
 
 
 
这就是问题，什么是Chipmunk，所以我可以开始了解更多关于使用它。 
 
 
 
感谢
 -t 
解决方案
 t使用Chipmunk，但它可能是用C / C ++编写的。这是原因。
 
 
 
 编辑：它是用C写的。
 
 
 
  chipmunkBody 是一个指向struct的指针，而箭头运算符（  - > ）是如何访问成员一个struct通过指向C中的struct的指针。
 
Hopefully, this question isn't a dumb as I fear it sounds, but it may still be pretty dumb. 

I'm new to Objective-C, and Cocoa. In fact, I'm completely new to C in general. I'm trying to implement an iPhone game using Cocos2d-iPhone. It's a game I've made before in Flash, so I thought it would be a nice way to lean Objective C, cocoa and cocos2d. 

One thing I am having a big problem with is understanding why all the Chipmunk code looks different to all the normal Objective-C stuff. For example, there's stuff like
chipmunkBody->position.x
which I thought would have been

chipmunkBody.position.x or maybe [[chipmunkBody position] x] (bad example maybe). 

One way this keeps on biting me in the ass is with cpVect. cpVect is pretty important, but I can't for the life of me figure out how to pass it around. CGPoint, no problem, I can make pointers, pass them around in methods and what not, but the second I use cpVect instead, it's "welcome to Errorville, population you".

So that's the question, what is Chipmunk, so I can start finding out more about working with it. 

thanks
-t
解决方案
I haven't used Chipmunk, but it's probably written in C/C++. That's the reason.

EDIT: Yup, it's written in C.

chipmunkBody is a pointer to a struct, and the arrow operator (->) is how you access the members of a struct through a pointer to the struct in C.

                        
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