From: Tobias Nurmiranta <spyck@...>
Date: 2004-03-03T20:28:58+09:00
Subject: Re: Ruby binding for GLFW

On Wed, 3 Mar 2004, Glenn M. Lewis wrote:
> 	Has anyone created a binding of GLFW for Ruby?  I couldn't find it
> on RAA.  It would probably be a snap with SWIG.  If not, I'll try it out.

Hi,

If you haven't seen it already, you can use GLUT which has at least a
subset of the functionality. As a newbie to Ruby, I must say I like the
feeling in the language ^_^. For example, it was very easy to make a
webcam viewer using OpenGL and Video4Linux.
,	Tobias

require "V4l"    # http://www.freepan.org/all/by-dist/ruby-v4l/
require "opengl" # http://www2.giganet.net/~yoshi/
require "glut"   # included in the opengl module.

width  = 320
height = 240
vid = V4l.new
vid.open("/dev/video")
vid.set_size(width, height)

display = Proc.new {
   GL.RasterPos(0, 0)
   GL.DrawPixels(width, height, GL::RGB, GL::UNSIGNED_BYTE, vid.capture)
   GLUT.SwapBuffers
   GLUT.PostRedisplay
}

reshape = Proc.new {|w, h|
   GL.Viewport(0, 0,  w,  h)
   GL.MatrixMode(GL::PROJECTION)
   GL.LoadIdentity
   GLU.Ortho2D(0.0,  w, 0.0, h)
   GL.MatrixMode(GL::MODELVIEW)
   GL.LoadIdentity
}

keyboard = Proc.new {|key, x, y| exit(0) if key == 27 } #escape

GLUT.Init
GLUT.InitDisplayMode(GLUT::DOUBLE | GLUT::RGB)
GLUT.InitWindowSize(320, 240)
GLUT.InitWindowPosition(100, 100)
GLUT.CreateWindow($0)
GL.ClearColor(0.0, 0.0, 0.0, 0.0)
GL.ShadeModel(GL::FLAT)
GL.PixelStorei(GL::UNPACK_ALIGNMENT, 1)
GLUT.DisplayFunc(display)
GLUT.ReshapeFunc(reshape)
GLUT.KeyboardFunc(keyboard)
GLUT.MainLoop