Re: drawing a very long line on the screen and how much of the lifting I have to do

Nathan smith wrote:
>
> Regarding the pixel v.s. CM rule, I just did a google on the matter 
> which told me a probably inaccurate figure, though it worked for rough 
> testing purposes.
>
> I ended up going with around 12.5 pixels to the half CM.

As long as you're just using it for relative placement, that's perfectly 
OK.  But if you're doing something where real-world measurements matter, 
it's not that easy.  12.5 pixels per 0.5cm comes out to 64 pixels per 
inch.  Most Windows displays run 96 ppi, many run 120, but these days 
the variation is quite large.

It's quite possible your app doesn't care -- most don't  -- but it's 
something to tuck away for later.

-- 
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.


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