# OpenGL-0.32g for Apple MacOS X **URL:** \ **Category:** Ruby\ **Created:** [January 29, 2006, 1:22am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207 "2006-01-29T01:22:28Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 1:22am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/1 "2006-01-29T01:22:28Z")
In case anyone needs this, I’ve uploaded my tweaked version of the latest rb-opengl bindings to: [http://www.lazyatom.com/software/opengl-0.32g.tar.gz](http://www.lazyatom.com/software/opengl-0.32g.tar.gz) You’ll need the Developer Tools and probably the GLUT source from Apple already installed. Here’s the README: 2005-04-26 :: James A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) 2006-01-28 :: (Updated to rb-opengl-0.32g) # Ruby-OpenGL Bindings for Mac OS X So basically here’s a tweaked version of the original OpenGL module for the Mac. To compile, just follow the same instructions as normal: Build it - don’t worry too much about any warnings: $ ruby extconf.rb $ make Test it out: $ ruby sample/robot.rb (press the ‘e’ and ‘s’ keys to make the “robot” move…) Install it: $ make install (or possibly “sudo make install”, depending on where your ruby is) ## Changes I’ve made extconf.rb: Added -framework flags and correct include directories Hacked to generate GLUT module even without detection of -lGLUT, since mkmf can’t deal with the Mac GLUT framework \*.c: Edited #includes to use \ and \ glut.c: I’ve added the function CheckLoop to the GLUT module in line with the same function in Apple’s GLUT. GLUT’s MainLoop is blocking and forces you to perform additoinal processing using GLUT’s IdleFunc system, which can sometimes be very undesirable (particularly if you are using Ruby as the glue between two libraries which both feature this type of loop). CheckLoop allows you to cycle through a _single_ GLUT processing loop, and then returns control to the calling thread/process. Thus, by periodically calling CheckLoop, you can get the scene to update without having GLUT seize control of the whole application. I’ve also added calls for Glut.GameModeString(mode\_string) and Glut.EnterGameMode(), allowing you to switch your application to fullscreen. Finally, a new method GLUT.BitmapCharacterX(char) for displaying characters, since there seems to be a problem with the default GLUT.BitmapCharacter method. ## Problems For some reason, including the libraries from the command line fails. For instance: $ irb irb(main):001:0\> require ‘opengl’; require ‘glut’ =\> true … works fine, but: $ irb -r opengl /usr/local/lib/ruby/site\_ruby/1.8/powerpc-darwin8.0.0/opengl.bundle: [BUG] Bus Error ruby 1.8.2 (2004-12-25) [powerpc-darwin8.0.0] Abort trap … clearly fails. You can see the discussion of this problem (something unfortunately inherent with IRB on the mac) here: [http://ruby-talk.org/cgi-bin/scat.rb/~poffice/news2/comp.lang.ruby/23917](http://ruby-talk.org/cgi-bin/scat.rb/~poffice/news2/comp.lang.ruby/23917) Or the quick fix, detailed here: [http://ruby-talk.org/cgi-bin/scat.rb/~poffice/news2/comp.lang.ruby/24004](http://ruby-talk.org/cgi-bin/scat.rb/~poffice/news2/comp.lang.ruby/24004) ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 5:32am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/2 "2006-01-29T05:32:24Z")
On 1/28/06, James A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > In case anyone needs this, I’ve uploaded my tweaked version of the > latest rb-opengl bindings to: Has anyone used Ruby + OpenGL for anything of interest? Joe ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 7:24am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/3 "2006-01-29T07:24:07Z")
From: “Joe Van D.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > Has anyone used Ruby + OpenGL for anything of interest? I’ve been stoked by the librend screenshots: [http://librend.rubyforge.org/wiki/wiki.pl](http://librend.rubyforge.org/wiki/wiki.pl) (Project Page) For ex: [http://librend.rubyforge.org/screenshots/picking.png](http://librend.rubyforge.org/screenshots/picking.png) [http://librend.rubyforge.org/screenshots/round\_cut.png](http://librend.rubyforge.org/screenshots/round_cut.png) [http://librend.rubyforge.org/screenshots/textured\_tram.png](http://librend.rubyforge.org/screenshots/textured_tram.png) [http://librend.rubyforge.org/screenshots/topview\_follow\_ghost.jpg](http://librend.rubyforge.org/screenshots/topview_follow_ghost.jpg) This is looking like an awesome library. Regards, Bill ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 5:51pm UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/4 "2006-01-29T17:51:55Z")
Trying this, I get objc: failed objc\_getClass(NSObject) for GLUTApplication-\>isa-\>isa objc: please link appropriate classes in your program Trace/BPT trap I cleaned out the old opengl.bundle and glut.bundle and re-built the bindings from the new package. I have no idea what this error means, so any tips would be appreciated 🙂 I do have the GLUT.framework and X-Code installed, so I think I’m good there. ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 9:48am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/5 "2006-01-29T09:48:39Z")
On 1/29/06, Bill K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > [http://librend.rubyforge.org/screenshots/picking.png](http://librend.rubyforge.org/screenshots/picking.png) > [http://librend.rubyforge.org/screenshots/round\_cut.png](http://librend.rubyforge.org/screenshots/round_cut.png) > [http://librend.rubyforge.org/screenshots/textured\_tram.png](http://librend.rubyforge.org/screenshots/textured_tram.png) > [http://librend.rubyforge.org/screenshots/topview\_follow\_ghost.jpg](http://librend.rubyforge.org/screenshots/topview_follow_ghost.jpg) Here’s a 10MB video of a presentation I made for class using librend: [http://www.cs.helsinki.fi/u/irkheikk/fx\_final.avi](http://www.cs.helsinki.fi/u/irkheikk/fx_final.avi) Needs an XviD codec of some sort, don’t know exactly _what_ sort. It was more fun than doing the usual powerpoint thing, and a lot more work too. But now I can extract all the effects and add them to librend proper 🙂 Source at [http://librend.rubyforge.org/fx/fx.rb](http://librend.rubyforge.org/fx/fx.rb) but it’s against an old CVS version, and I managed to break stuff in the current CVS, so it’s not going to work until the next release of librend. > This is looking like an awesome library. Thanks, appreciate it. Cheers, Ilmari ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 29, 2006, 9:08pm UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/6 "2006-01-29T21:08:39Z")
Hmm… the addition of “–framework Foundation” should prevent this and ensure that the Obj-C runtime is initialised. Can you confirm that your compile includes this flag? (it should be added automatically for the darwin platform by the appropriate section in extconf.rb - james ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 31, 2006, 2:03pm UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/7 "2006-01-31T14:03:00Z")
> It was more fun than doing the usual powerpoint thing, and a lot more > work too. But now I can extract all the effects and add them to > librend proper 🙂 > > Source at [http://librend.rubyforge.org/fx/fx.rb](http://librend.rubyforge.org/fx/fx.rb) but it’s against an > old CVS version, and I managed to break stuff in the current CVS, so > it’s not going to work until the next release of librend. Quite impressive 😉 -g. ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 31, 2006, 6:16pm UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/8 "2006-01-31T18:16:16Z")
On 1/29/06, tsuraan [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > So, it looks like I’m using the foundation framework. Does ruby need > to be compiled with it also? I dont’ think so - I just compiled it with the normal options and it seemed to work fine. I know I’ve had errors like this in the past, but I can’t for the life of me remember how I got them to go away! ☹ ---
**Author:** ![nitr0z](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/ba9def/32.png) [@nitr0z](https://www.ruby-forum.com/u/nitr0z)\ **Post date:** [January 30, 2006, 12:18am UTC](https://www.ruby-forum.com/t/opengl-0-32g-for-apple-macos-x/53207/9 "2006-01-30T00:18:45Z")
> Hmm… the addition of “–framework Foundation” should prevent this > and ensure that the Obj-C runtime is initialised. Can you confirm that > your compile includes this flag? (it should be added automatically for > the darwin platform by the appropriate section in extconf.rb The full result of typing ‘make’ is (sorry for the long ugly post): Now Making glut extend module gcc -fno-common -g -O2 -fno-common -pipe -fno-common -I. -I/System/Library/Frameworks/OpenGL.framework/Headers -I/System/Library/Frameworks/GLUT.framework/Headers -I. -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I. -c glut.c glut.c: In function `glut_KeyboardFunc': glut.c:157: warning: passing arg 1 of`glutKeyboardFunc’ from incompatible pointer type cc -dynamic -bundle -undefined suppress -flat\_namespace -framework OpenGL -framework GLUT -framework Foundation -L"/usr/lib" -L"/System/Library/Frameworks/OpenGL.framework/Libraries/" -o glut.bundle glut.o -lruby -lGLU -lGL -lpthread -ldl -lobjc -lruby Now Making opengl extend module gcc -fno-common -g -O2 -fno-common -pipe -fno-common -I. -I/System/Library/Frameworks/OpenGL.framework/Headers -I/System/Library/Frameworks/GLUT.framework/Headers -I. -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I. -c glu.c glu.c: In function `glu_PickMatrix': glu.c:1185: warning: passing arg 2 of`ary2cint’ from incompatible pointer type glu.c: In function `glu_Project': glu.c:1224: warning: passing arg 2 of`ary2cint’ from incompatible pointer type glu.c: In function `glu_UnProject': glu.c:1269: warning: passing arg 2 of`ary2cint’ from incompatible pointer type gcc -fno-common -g -O2 -fno-common -pipe -fno-common -I. -I/System/Library/Frameworks/OpenGL.framework/Headers -I/System/Library/Frameworks/GLUT.framework/Headers -I. -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I. -c ogl.c gcc -fno-common -g -O2 -fno-common -pipe -fno-common -I. -I/System/Library/Frameworks/OpenGL.framework/Headers -I/System/Library/Frameworks/GLUT.framework/Headers -I. -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I/usr/lib/ruby/1.8/powerpc-darwin7.9.0 -I. -c rbogl.c cc -dynamic -bundle -undefined suppress -flat\_namespace -framework OpenGL -framework GLUT -framework Foundation -L"/usr/lib" -L"/System/Library/Frameworks/OpenGL.framework/Libraries/" -o opengl.bundle glu.o ogl.o rbogl.o -lruby -lGLU -lGL -lpthread -ldl -lobjc -lruby So, it looks like I’m using the foundation framework. Does ruby need to be compiled with it also?