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// CODESTYLE: v2.0// main.cpp// Project: Free-GLUT Demo #1 (GLUTDemo1)// Author: Richard Marks#include <GL/gl.h>#include <GL/glut.h>#include <GL/glu.h>namespace GLUTDemo1{	class Demo	{	public:		bool Initialize(int argc, char* argv[]);		void Execute();				static void RenderScene();	private:	};		bool Demo::Initialize(int argc, char* argv[])	{		glutInit(&argc, argv);		glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);		glutInitWindowSize(640, 480);		glutInitWindowPosition(64, 64);		glutCreateWindow("Free-GLUT Demo #1");		glutDisplayFunc(Demo::RenderScene);	}		void Demo::Execute()	{		glutMainLoop();	}		void Demo::RenderScene()	{		glClear(GL_COLOR_BUFFER_BIT);		glBegin(GL_TRIANGLES);		glVertex3f(-0.5f, -0.5f, 0.0f);		glVertex3f(0.5f, 0.0f, 0.0f);		glVertex3f(0.0f, 0.5f, 0.0f);		glEnd();		//glFlush();		glutSwapBuffers();	}	} // end namespaceint main(int argc, char* argv[]){	GLUTDemo1::Demo demo;	if (demo.Initialize(argc, argv))	{		demo.Execute();	}	return 0;}