/*
NOTE:

This program is to create a window for us.

Don't misunderstand that we are going to create a window.

We will be taking someone else's help to create a window.

We will simply ask that "someone" to create a window with..
--> size
--> position
--> name(title)
of our choice.

And that "someone" is glut; glut stands for graphics library utility kit

You can download freeglut from the web


for VC++:

--> from the menu, click on ....

Tools -> options -> VC++ directories 

Make sure that you add the include and library paths appropriately
(I'm sure that I've created a tutorial for this; 
feel free to explore my site www.gamesnmaths.net )



for Unix/Lunix:

-->Make sure that you have a shell to type the following commands

INSTALLATION:
--> "sudo apt-get install freeglut3-dev"

COMPILATION:
--> "cc 001_Window.c -lglut"

EXECUTION:
--> "./a.out"




IMPORTANT: Once you run this program....

WHAT YOU ARE NOT SUPPOSED TO DO:

--> Don't Maximize the window
--> Don't resize the window
--> Don't move the window
--> Don't click inside the window
--> Don't drag inside the window
--> Don't scroll inside the window
--> Don't expect that pressing ESC key will close the window
--> Don't blame me if your machine hangs :P


WHAT YOU ARE ALLOWED TO DO:

--> minimize the window
--> close the window
*/



#include <GL/glut.h>

void Draw(void)
{
    // Nothing...
    // We are drawing nothing
}


int main(int argc, char** argv)
{
    const int left   = 100;
    const int top    = 100;
    const int width  = 256;
    const int height = 256;

    const char* windowTitle = "I'll be back";

    glutInit(&argc, argv);

    //Chill out guys...
    //Don't ask me what these SINGLE and RGB has got to do with
    //display mode.  or what is a display mode.
    //It is covered in some other tutorial.
    //For time being... just ignore it
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

    glutInitWindowSize(width, height); 
    glutInitWindowPosition(left, top);
    glutCreateWindow(windowTitle);
    glutDisplayFunc(Draw);
    glutMainLoop();

    return 0;
}


/*

Exercise 1:

Change the position and dimensions of the window
based on the command line arguments

eg: ./a.out 0 0 1024 768



Exercise 2:

Change the position and dimensions of the window
after parsing the command line arguments

eg: ./a.out -left 100 -width 256 -height 1024 -top 0

*/


//
//                       MORAL of this tutorial:
//                      ~~~~~~~~~~~~~~~~~~~~~~~~
// When you don't know how to do something; at least know who can do it
//