Chipmunk Physics

Posted: **Sun Apr 01, 2012 5:19 pm**

Hi, I'm just starting some work on a Go wrapper for the library as part of a small project I'm working on. I'd like to disable use of CGPoint and CGFloat and just use the CP types but can't seem to get it working through the cmake -> make process. I tried using:

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cmake -D BUILD_DEMOS:BOOL=OFF -D CP_USE_CGPOINTS:BOOL=0 .
make
etc.

Then I tried with this flag:

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CMAKE_C_FLAGS:STRING="-DCP_USE_CGPOINTS=0"

But it still seems to be compiling CGPoint into the libraries as I get errors like this:

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cmunktest.go:16<SNIP>: cannot use x (type float64) as type _Ctype_CGFloat in field value

Is there any standard way to fully disable compiling with CGPoint?

Thanks for your help.

Posted: **Sun Apr 01, 2012 5:59 pm**

Can you try the latest in GitHub? There was this fix recently:
https://github.com/jacekmigacz/Chipmunk ... 8006b24ca5

Posted: **Sun Apr 01, 2012 6:11 pm**

In trying to make it work, I made the same edit (changing ifdef to if down at the bottom of the types header) but that doesn't seem to do it. Even with:

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CMAKE_C_FLAGS:STRING=-DCP_USE_CGPOINTS=0

It still manages to somehow end up using CGPoint. If I comment that condition out it doesn't use CGPoint but it's not a great solution (especially for updates down the road). I'm not super familiar with cmake so I might be missing something.

Posted: **Sun Apr 01, 2012 10:10 pm**

Ok, it turns out that the problem was that I missed a character in Go's cgo configuration to add the flag. My apologies for the wild goose chase. All is working well now.

Chipmunk Physics

Disabling use of CGPoint, CGFloat on Mac OS X

Disabling use of CGPoint, CGFloat on Mac OS X

Re: Disabling use of CGPoint, CGFloat on Mac OS X

Re: Disabling use of CGPoint, CGFloat on Mac OS X

Re: Disabling use of CGPoint, CGFloat on Mac OS X