'A Simple One' - Revisited
==========================

We once again go back to the first program to reinforce
some of the principles.

This time around we provide means to not only change
the color of the square, but also the position of the
OGL window (where the square is rendered) and the 
size (width and height) of the rendering window can
be changed.

Change the values as you desire and click on execute
and see what happens.  
The Reset button sets all parameters to default positons.

You should now look at the actual code of the program
in front of you.  The following additional things come
to light :

  o     As before glColor3f(red, green, blue); controls
	the amount of each color used in drawing the
	square

  o     Scroll down on the code screen.  At the very 
	bottom we see a call to glutInitWindowSize()
	This takes as arguements 'width' and 'size'
	When you changed the 'Window Width' and the
	'Window Height' parameters using the sliding
	scale these were the variables getting affected.

	The glutInitWindowSize() thus sets the initial
	dimensions of the rendering screen.

  o     Also we see a function glutInitWindowPositon()
	This function takes as its arguements 'winX' and
	'winY'.  When you changed the 'Window X' and 
	the 'Window Y' parameters using the sliding scale 
	these were the variables getting affected.

	The glutInitWindowPosition() places your OGL
	window at the positon as defined by the parameters
	'winX' and 'winY' passed to it.  

	Also notice that the upper left hand corner of the
	screen corresponds ot the (0,0) positon.

   SUMMARY 
   =======
  o     glColor3f() is used to change the color of the
	objects being rendered
  o     glutInitWindowSize() sets the size in terms of
	width and height of the OGl window
  o     glutInitWindowPositon() sets the positon of the
	OGL window on your monitor.



   TRY THIS EXERCISE
   =================

	Change the window width to 500.  Leave the window
	height at 250.  What happens?

	Our square which we drew is now a rectangle!! 
	 Why??

	We will learn more about aspect ratios, and reshape
	functions so that the geometry of the object is
	maintained even when the window is dragged or
	 resized etc.  This we shall do in future sections.