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Re: Need informations about NSAnimation on MacOS


From: Xavier Glattard
Subject: Re: Need informations about NSAnimation on MacOS
Date: Fri, 23 Mar 2007 15:04:50 +0000 (UTC)
User-agent: Loom/3.14 (http://gmane.org/)

 <leeg <at> thaesofereode.info> writes:

> > 2) I dont understand the 3 NSAnimationCurve...
> > - Are they linear or polynomic functions ?
> > - what do 'slowly speeds up' and 'slows down' really mean ?
> >
> 
> They're certainly polynomial, but in fact they may not fit any
> finite-order polynomial function (may be sinusoidal for instance).  I
> agree with the suggestion by Nicolas that approximating a Bezier curve is
> a good approach.

I agree :-)

I had a quick look in gnustep code but i can't find any Bezier curve
implementation : all the math is hidden in the low level display 
server/library.

Any suggestion ? A well-known library that could help me ?

Thanks !

Xavier






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