ruby-opengl on Mac OS X

[Robert Poor]

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?

Thanks.

- ff

 

[Gregory Seidman]

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

 

[Fearless Fool]

...
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.

--Greg

Greg:

Whoo hoo! It Just Works. Many thanks.

- Rob

 

[Sy Yoon]

Greg:

Whoo hoo! It Just Works. Many thanks.

- Rob

Hello, Greg and Rob, Sorry for my newbie question in advance.

I am in very similar situation as Rob was in: I installed
ruby-opengl-0.40.1
in OS X(v. 10.4.10), and found 'opengl.rb' and others in

/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/lib/opengl.rb

But when I do irb(main):003:0> require 'gl'
I get the following error:


LoadError: Failed to lookup Init function ./gl.bundle
from ./gl.bundle
from (irb):2

(Well, 'opengl.rb' file contains line "require 'gl'" anyway, but when I
do
irb(main):003:0> require 'opengl', I receive:
LoadError: Failed to lookup Init function ./gl.bundle
from ./gl.bundle
from ./opengl.rb:16
from (irb):1:in `require'
from (irb):1 )

I also tried to test run 'plane.rb' file located in
/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/lib/examples
using TextMate and got the following:

/Volumes/TextMate1.5.5/TextMate.app/Contents/SharedSupport/Support/lib/
scriptmate.rb:107:in `initialize': Permission denied -
/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/examples/plane.rb
(Errno::EACCES) from /Volumes/TextMate

What am I doing wrong?


Sy

 

[Julian Raschke]

Hi,

/Volumes/TextMate1.5.5/TextMate.app/Contents/SharedSupport/Support/lib/
scriptmate.rb:107:in `initialize': Permission denied -
/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/examples/plane.rb
(Errno::EACCES) from /Volumes/TextMate

What am I doing wrong?

I think TextMate needs write access to files to run them (bug?). I had
the very same problem yesterday, even with a 'properly' installed
TextMate, and I ended up copying the example .rb files to the Desktop.
Could run them from there without problems.

Julian

 

[Sy Yoon]

Hi,


I think TextMate needs write access to files to run them (bug?). I had
the very same problem yesterday, even with a 'properly' installed
TextMate, and I ended up copying the example .rb files to the Desktop.
Could run them from there without problems.

Julian

Ok, I copied an exmple rb file to the Desktop where TextMate is, but
still get:

LoadError: Failed to lookup Init function
/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/lib/gl.bundle

method require in custom_require.rb at line 32
at top level in gl-test.rb at line 46

???

BTW, my TextMate is a trial version.

Sy

 

[Jesús Gabriel y Galán]

Ok, I copied an exmple rb file to the Desktop where TextMate is, but
still get:

LoadError: Failed to lookup Init function
/usr/local/lib/ruby/gems/1.8/gems/ruby-opengl-0.40.1/lib/gl.bundle

method require in custom_require.rb at line 32
at top level in gl-test.rb at line 46

???

BTW, my TextMate is a trial version.

Don't know if it might be the same problem, but just in case. I was
trying to install opengl in Ubuntu, but couldn't make it work, until
someone pointed to me that opengl.0.40.1 required version 1.9+ of
rubygems. So maybe you could try to upgrade to version 1.9 to see if
that's the problem?

In Ubuntu:

sudo gem update --system

Don't know how to do it in Mac OS X, though.

Hope this helps,

Jesus.