Skip to main content

Adding box2d header causes a torrent of compiler errors

Image
By User



I am experiencing either an extremely weird error or a temporary loss of brain function.





I have a box2d / cocos project running in XCode. This all works fine but my code is currently a proof of concept "hack". Stage one of cleaning up the code is creating classes for various objects.





Now, if I create a brand new Objective C class (inherited off NSObject) as below it all compiles fine. As soon as I attempt to import the "Box2D.h" I receive a gazillion errors originating from the box2d library saying it cannot be built. 201 to be precise and it indicates no issues with the class itself. Can anyone shed any light? I have already tried a clean and rebuild as well as restarting XCode.





My super complicated class definition







#import "Box2D.h"



@interface test : NSObject



@end







An example compiler error thrown







Expected '=', ',', ';', 'asm' or '__attribute__' before 'b2Fixture' in /Users/..../libs/Box2D/Dynamics/b2Body.h




Labels:

Comments

  1. Tips For AllMarch 1, 2012 at 9:40 AM

    You need an Objective-C++ file for this, because Box2D is written in C++ and thus doesn't compile in Objective-C out of the box. Luckily, its just a matter of renaming your file from myClass.m to myClass.mm

    ReplyDelete
  2. Tips For AllMarch 1, 2012 at 9:40 AM

    A quick google turned up the header in question. It looks like C++ code. That means you'll need to compile as Objective-C++ if you want things to work. Probably you're not doing that now - the easy way is to change your file's extention to .mm.

    ReplyDelete

Post a Comment

Popular posts from this blog

[韓日関係] 首相含む大幅な内閣改造の可能性…早ければ来月１０日ごろ＝韓国

By Unknown
Post a Comment
Read more

div not scrolling properly with slimScroll plugin

By User
I am using the slimScroll plugin for jQuery by Piotr Rochala Which is a great plugin for nice scrollbars on most browsers but I am stuck because I am using it for a chat box and whenever the user appends new text to the boxit does scroll using the .scrollTop() method however the plugin's scrollbar doesnt scroll with it and when the user wants to look though the chat history it will start scrolling from near the top. I have made a quick demo of my situation http://jsfiddle.net/DY9CT/2/ Does anyone know how to solve this problem?
1 comment
Read more

Why does this javascript based printing cause Safari to refresh the page?

By User
The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex
5 comments
Read more