On Fri, May 03, 2002 at 01:48:38AM +0200, [EMAIL PROTECTED] wrote:
> by now i got it to work, too - but only from within a regular application
> but not from a hack. exactly the same code works gives different results.
^^^^
Oh. I'm sorry I didn't notice this before.
The Cephes Maths Library uses global variables from time to time. Hacks
don't have global variables. Boom! For example,
> i=sqrt(i);
> //2 - works from both appl and hack
sqrt() and the functions it uses happen not to use any globals.
> i=(float)atan(i);
> // results to 1 from application (trunced from
> 1,5607966601082313810249815754305)
> // but to 0 from a hack
But atan() does use some globals, for example, PIO2F, which is a global
constant with the value pi/2.
There are various ways to fix this. Perhaps the quickest is for you to
write or find your own atan() function that does not use globals.
John
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