>I'm not sure if anyone has mentioned this, but I was thinking about this during a walk.
>
>Say you wanted to draw a line from the left side of the screen to the right side of the screen.
>
>Wouldn't the far left have x = 0?
>
>
>That is, unless you'd make the origin of a 2D grid 1,1.
>
>But you wouldn't.
>
>So 0 is necessary.
>
>
>And, back when memory was a luxury, why waste the 0?

All comments have been interesting in this thread. Thanks for sharing yours.