#OpenGL nehe lesson01 tip on #debian #ubuntu

Download the first lesson
Linux Code For This Lesson. ( Conversion by Richard Campbell )

	//
	// This code was created by Jeff Molofee '99 (ported to Linux/GLUT by Richard Campbell '99)
	//
	// If you've found this code useful, please let me know.
	//
	// Visit me at www.demonews.com/hosted/nehe
	// (email Richard Campbell at ulmont@bellsouth.net)
	//
	#include <GL/glut.h> // Header File For The GLUT Library
	#include <GL/gl.h> // Header File For The OpenGL32 Library
	#include <GL/glu.h> // Header File For The GLu32 Library
	#include <unistd.h> // Header file for sleeping.
	/* ascii code for the escape key */
	#define ESCAPE 27
	/* The number of our GLUT window */
	int window;
	/* A general OpenGL initialization function. Sets all of the initial parameters. */
	void InitGL(int Width, int Height) // We call this right after our OpenGL window is created.
	{
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black
	glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
	glDepthFunc(GL_LESS); // The Type Of Depth Test To Do
	glEnable(GL_DEPTH_TEST); // Enables Depth Testing
	glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity(); // Reset The Projection Matrix
	gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); // Calculate The Aspect Ratio Of The Window
	glMatrixMode(GL_MODELVIEW);
	}
	/* The function called when our window is resized (which shouldn't happen, because we're fullscreen) */
	void ReSizeGLScene(int Width, int Height)
	{
	if (Height==0) // Prevent A Divide By Zero If The Window Is Too Small
	Height=1;
	glViewport(0, 0, Width, Height); // Reset The Current Viewport And Perspective Transformation
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f);
	glMatrixMode(GL_MODELVIEW);
	}
	/* The main drawing function. */
	void DrawGLScene()
	{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
	glLoadIdentity(); // Reset The View
	// since this is double buffered, swap the buffers to display what just got drawn.
	glutSwapBuffers();
	}
	/* The function called whenever a key is pressed. */
	void keyPressed(unsigned char key, int x, int y)
	{
	/* avoid thrashing this procedure */
	usleep(100);
	/* If escape is pressed, kill everything. */
	if (key == ESCAPE)
	{
	/* shut down our window */
	glutDestroyWindow(window);
	/* exit the program...normal termination. */
	exit(0);
	}
	}
	int main(int argc, char **argv)
	{
	/* Initialize GLUT state - glut will take any command line arguments that pertain to it or
	X Windows - look at its documentation at http://reality.sgi.com/mjk/spec3/spec3.html */
	glutInit(&argc, argv);
	/* Select type of Display mode:
	Double buffer
	RGBA color
	Alpha components supported
	Depth buffer */
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_ALPHA | GLUT_DEPTH);
	/* get a 640 x 480 window */
	glutInitWindowSize(640, 480);
	/* the window starts at the upper left corner of the screen */
	glutInitWindowPosition(0, 0);
	/* Open a window */
	window = glutCreateWindow("Jeff Molofee's GL Code Tutorial ... NeHe '99");
	/* Register the function to do all our OpenGL drawing. */
	glutDisplayFunc(&DrawGLScene);
	/* Go fullscreen. This is as soon as possible. */
	glutFullScreen();
	/* Even if there are no events, redraw our gl scene. */
	glutIdleFunc(&DrawGLScene);
	/* Register the function called when our window is resized. */
	glutReshapeFunc(&ReSizeGLScene);
	/* Register the function called when the keyboard is pressed. */
	glutKeyboardFunc(&keyPressed);
	/* Initialize our window. */
	InitGL(640, 480);
	/* Start Event Processing Engine */
	glutMainLoop();
	return 1;
	}

view raw lesson1.c hosted with ❤ by GitHub

mkdir lesson01
$ cd lesson01/
wget http://nehe.gamedev.net/data/lessons/linux/lesson01.tar.gz
tar -zxvf lesson01.tar.gz

sudo apt-get install freeglut3-dev
apt-get install libxmu-dev
apt-get install libxi-dev

make
./lesson1

you will get a beautiful beautiful black screen

press ESC
The webgl lesson is a little bit longer and tougher
http://learningwebgl.com/blog/?p=28