Certainly there are things in life that money 
can't buy; but did you ever try buying them without
money ? - Ogden Nash

Concept 2.2 : Antialiasing in RGBA Mode
=======================================

Important Note:
=============== 
If you are using Mesa version 2.3 or lower
antialiasing is not supported.  If you are using
SGI OpenGl this example will visually make more
sense.

Right Click on the rendering window for a menu
This example initializes the necessary modes for 
antialiasing and then draws a red colored cube.   
The 'r' key rotates the cube so that you can see 
the effect of antialiasing on lines of differing
slopes.  

In RGBA mode, one must enable blending.  The
blending factors typically used are GL_SRC_ALPHA
for the source and GL_ONE_MINUS_SRC_ALPHA for
the destination.  Alternatively GL_ONE can be 
used for the destination factor to make the lines
a little brighter where they intersect.  The anti-
aliased effect is most noticeable if one uses a
fairly high alpha value.