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#!/usr/bin/env rubyrequire 'glut'require 'opengl'initOpenGL = Proc.new{|x,y|		GLUT.Init(ARGV)		GLUT.InitDisplayMode(GLUT::RGB)		GLUT.InitWindowPosition(200,200)		GLUT.InitWindowSize(x,y)		GLUT.CreateWindow("Cours OpenGL avec Ruby !")		GL.ClearColor(0,0,0,0)		GL.PointSize(2)}affichage = Proc.new{		GL.Clear(GL::COLOR_BUFFER_BIT)		GL.Begin(GL::POLYGON)				GL.Color3f(1.0,0.0,0.0)				GL.Vertex2f(-0.5,-0.5)				GL.Color3f(0.0,1.0,0.0)				GL.Vertex2f(0.5,-0.5)				GL.Color3f(0.0,0.0,1.0)				GL.Vertex2f(0.5,0.5)				GL.Color3f(1.0,1.0,1.0)				GL.Vertex2f(-0.5,0.5)		GL.End()		GL.Flush()}clavier = Proc.new{|key,x,y|		case key.chr				when 'p'						GL.PolygonMode(GL::FRONT_AND_BACK,GL::FILL)						GLUT.PostRedisplay()				when 'f'						GL.PolygonMode(GL::FRONT_AND_BACK,GL::LINE)						GLUT.PostRedisplay()				when 's'						GL.PolygonMode(GL::FRONT_AND_BACK,GL::POINT)						GLUT.PostRedisplay()				when 'q'						exit(0)						end} initOpenGL(200,200)GLUT.DisplayFunc(affichage)GLUT.KeyboardFunc(clavier)GLUT.MainLoop()