On Mon, 07 Jul 2008 09:52:24 +1000
Tim Ansell <[EMAIL PROTECTED]> wrote:
> > I could easily change it to be universe at the center with size as a
> > radius. But now that I think about it, why doesn't everything just
> > use floats and normalized positions? Wouldn't that be nicer on
> > client side too? So the clients could scale and do other math
> > trivially?
>
> Floats are a pain in the butt to transmit, encode and receive
> (specially across multiple languages).
>
> Ints are much easier hence that is why we use them.
And of course operations on integers are nicely defined. Not so with floats,
so a difference in a calculation performed on the client & server is a bug
with a int, with a float, it's an implementation issue.
The classic case:
double x = 3/7.0;
if (x == x/7.0)
printf("Equal\n");
else
printf("Not Equal\n");
A conforming IEEE implementation may print "Not Equal".
Best to avoid when distributing.
Regards,
nash
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