From: Ilmari Heikkinen <kig@...>
Date: 2005-05-17T21:47:25+09:00
Subject: Ruby/SDL on OSX, part 2

Was surfing the internets today, in search for workable SDL solutions 
for OSX.

And here's two:

This one's a wrapper for executing Ruby. It links the SDL libraries and 
ruby and
makes an executable - rsdl, which can then be used to run Ruby/SDL 
scripts on
OSX. This works very well, but since it uses a custom executable, you'd 
pretty
much need to bundle the exe with your app.
http://www.kumaryu.net/hiki.cgi?%28Ruby%29+Ruby%2FSDL%CD%D1ruby

The second way is to use Ruby/Cocoa, which lets you create an SDL 
window on OSX.
It spews out a metric ton of error messages but seems to work, sans 
input events :I
Wonder if there's any way to make it work better.

# Ruby/Cocoa + Ruby/SDL + OpenGL
# hello_sdl.rb
#
def osx?
   PLATFORM =~ /darwin/
end
require 'osx/cocoa' if osx?
require 'sdl'
require 'opengl'
require 'glut'

if $0 == __FILE__ then
   app = OSX::NSApplication.sharedApplication() if osx?

   SDL.init SDL::INIT_VIDEO
   SDL.setGLAttr SDL::GL_DOUBLEBUFFER, 1
   SDL.setVideoMode 640, 480, 32, SDL::OPENGL
   SDL::WM.setCaption "Hello SDL & OpenGL", ""

   GL.ClearColor(0,0,0,0)
   GL.Enable(GL::DEPTH_TEST)
   GL.Clear(GL::COLOR_BUFFER_BIT | GL::DEPTH_BUFFER_BIT)
   GL.MatrixMode(GL::PROJECTION)
   GL.Enable(GL::LIGHTING)
   GL.Enable(GL::LIGHT0)
   GL.Light(GL::LIGHT0, GL::POSITION, [2,3,4,1])
   GL.LoadIdentity()
   GLU.Perspective 60, 1.3, 0.1, 100
   GL.MatrixMode(GL::MODELVIEW)
   GL.LoadIdentity()
   GLU.LookAt(2,2,2 , 0,0,0, 0,1,0)
   GLUT.SolidCube(1)
   SDL.GLSwapBuffers()

   loop{
     e = SDL::Event2.poll
     case e
     when SDL::Event2::KeyUp
       break if e.sym == ?q or e.sym == 27
     when SDL::Event2::Quit
       break
     end
   }
end


HTH,
Ilmari