From: anne001 <anne@...>
Date: 2006-07-07T20:34:53+09:00
Subject: Re: ruby-opengl

1. Did you look at Yoshi's install? I was not able to install 0.32g on
tiger with the 1.8.4 ruby. I was able to install it with 1.8.2 ruby,
moving the bundles to a directory 1.8.4 could see. Unless people can
install...

2. I can see why you would want to do away with  GL and GLUT in front
of the function, less typing, but for a beginner, they were very
useful. I should still be able to put them in front, no?

a) I found the GL and GLUT in front of the opengl function very helpful
just to remember what library the function came from

b) Swapping GL for a new class, I was able to redirect the output which
I found very useful:
as an opengl beginner, I found it difficult to figure out what the
opengl code was that I was outputing, given that I had recursive calls
through trees... (for the limb of a person for example) replacing GL by
a new class constant gave me a wonderful tool to redirect the code to a
text file without changing any of the code.
RealGL = GL

class LoggingGL
  class << self
    def method_missing(meth, *args)
      puts "#{meth}(#{args.join(', ')})"
     RealGL.send(meth, *args)
    end
    def const_missing(const)
      RealGL.const_get(const)
    end
  end
end

GL = LoggingGL

http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/84888e5307628bf3/a1d1508397bff92c?q=realGL&rnum=1#a1d1508397bff92c

3) "Your Ruby GL code should look a whole lot like your C code"
I don't agree with that idea at all. I spent a lot of time working on
robot.rb so it would take advantage of the
OOP aspect of ruby, and as a consequence, my ruby openGL does not look
much like the C code I think.
If I am going to code in ruby the way I would in C I don't really see
the point in using Ruby. In ruby, I am trying to code the ruby way.

4) Thank you for giving an example of the use of lambda. It took me a
while to figure out how to use that feature - with help from this list
--  as Yoshi's examples are straight C translation which use a fx.

reshape = lambda do |w, h|
    glViewport( ... )
    glMatrixMode( GL_PROJECTION )
    # etc.
    glMatrixMode( GL_MODELVIEW )
    glLoadIdentity
end

glutReshapeFunc( reshape )

5) I would be happy to pass you a copy of the robot.rb version I worked
on. I would love for someone who knows ruby to improve on it so people
have a real ruby way opengl example, instead of souped up C opengl
example to start with.