Re: Other Quesa concerns/suggestions

[James W. <ja...@fr...>]

Stefan Huber wrote:
>>> At least nan, inf, etc. do not work (correctly) when __FAST_MATH__ is on.
>> Please tell me more.  How do they work differently when it is off?
> 
> About two years ago I ported an app that relies on nan, etc. from CW 
> to Xcode. The main problem is (as far as I remember) that isnan, 
> isinf and similar functions always return false if __FAST_MATH__ is 
> on. Quesa does not use these functions.
> 
> BTW CWs "Relaxed IEEE Floating Point" setting works perfectly well with nan.

Quesa does use isfinite, and I'm sure I would have noticed if it wasn't 
working... rendering with shadows requires an infinite yon, and 
E3ViewAngleAspectCamera::GetFrustumMatrix uses isfinite to do the right 
thing in that case.

-- 
   James W. Walker, Innoventive Software LLC
   <http://www.frameforge3d.com/>