How to setup a Window with GLUT

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Here is your first OpenGL tutorial. How to make a Window.
First off you need to call the OpenGL header files. The basics are
gl.h and glut.h, with these two your program will run on whatever OS
it is compiled in as it does not currently rely on Windows.

After this next little bit, the rest of the code is explained below in the actual code.

To reshape a window in GLUT you need one command in the 'main' function
this is:
glutInitWindowSize (500, 500);
this will set it to 500 pixels high and 500 wide.
The other line you may notice I have added is:
glutInitWindowPosition (100, 100);
This sets where the window is located on the screen, in this case
100 pixels down and 100 to the right.

#include <GL/gl.h> //include the gl header file
#include <GL/glut.h> //include the glut header file

void display (void) {
glClearColor (0.0,0.0,0.0,1.0); //clear the color of the window
glClear (GL_COLOR_BUFFER_BIT); //Clear teh Color Buffer (more buffers later on)
glLoadIdentity(); //load the Identity Matrix
gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); //set the view
glFlush(); //flush it all to the screen
}

int main (int argc, char **argv) {
glutInit (&argc, argv); //initialize the program.
glutInitDisplayMode (GLUT_SINGLE); //set up a basic display buffer (only singular for now)
glutInitWindowSize (500, 500); //set whe width and height of the window
glutInitWindowPosition (100, 100); //set the position of the window
glutCreateWindow ("A basic OpenGL Window"); //set the caption for the window
glutDisplayFunc (display); //call the display function to draw our world
glutMainLoop (); //initialize the OpenGL loop cycle
return 0;
}

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