[ODE] why setTransform() ?

[John D. Gwinner]

Have to be carefull on the Win32 thing, if you are reading old
documentation it can be misleading.  I still find references to fixed
point 32 bit math as an optimization, for example.  (Newer PC's are
faster with floating than fixed).  I *think* (but can't give any
references) the doubles are as fast as floats, but it's been a while
since I hand optimized anything, so I'm not sure now.

Just making the point that the pace of evolution is fast on the PC side,
it's amazing the number of people say 'well, it's always been that way'
and of course is completely wrong (now).  I'll have to double check this
though.

               == John ==


> -----Original Message-----
> From: nathan@whatever.net [mailto:nathan@whatever.net] 
> Sent: Monday, January 07, 2002 6:58 PM
> To: ode@q12.org
> Subject: Re: [ODE] why setTransform() ?
> 
> 
> On Tue, 8 Jan 2002, Russ Smith wrote:
> 
> > ODE's matrices have 3 rows, not 4. also, ODE matrices may contain 
> > doubles whereas OpenGL matrices contain singles. so some kind of
> > setTransform() function is needed.
> 
> Aren't there double version of all of the OpenGL functions?  
> Like glMultMatrixf and glMultMatrixd?
> 
> I admittedly pretty new to OpenGL, but it seems like there's 
> two entire APIs in there, depending whether you want to use 
> floats or doubles.  Or maybe it's just a Win32 thing.
> 
> -- 
> 
> Nate Waddoups
> Redmond WA USA
> http://www.natew.com
> 
> 
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