From: Gregory Seidman <gsslist+ruby@...>
Date: 2007-09-20T22:38:28+09:00
Subject: Re: ruby-opengl on Mac OS X

On Thu, Sep 20, 2007 at 01:31:38PM +0900, Robert Poor wrote:
> All: Pardon this noobish question.  I'm trying to bring up ruby-opengl
> on my Mac OS X (v 10.4.10).
> 
> I ran "sudo gem install ruby-opengl" without any trouble -- gem
> announced that it was loading ruby-opengl 0.40.1 as well as mkrf-0.2.2
> -- so far so good!  I poked around and found that it had installed the
> following file (among others):
> 
>   /usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/lib/opengl.rb
> 
> This looks hopeful.  In irb, I typed:
> 
>   irb(main):106:0> require 'opengl'
> 
> which resulted in:
> 
>   LoadError: no such file to load -- opengl
>   from
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
> `gem_original_require'
>   from
> /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
> `require'
>   from (irb):106
>   from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:399
> 
> My question: My guess is this is a problem with paths.  What is the
> cleanest remedy?  Do I extend my path, make symbolic links, or move the
> opengl files?

I think you want to require 'gl' rather than 'opengl'. With a working
install of ruby-opengl on 10.4.10 I have the following in a working Ruby
script:

require 'rubygems'
require 'gl'
require 'glu'
require 'glut'

You don't need GLU or GLUT unless you're using them, mind you.

> Thanks.
> - ff
--Greg