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Re: [Devel] Problems with bbox code and cubic bezier curves


From: Tom Kacvinsky
Subject: Re: [Devel] Problems with bbox code and cubic bezier curves
Date: Tue, 24 Apr 2001 22:10:57 -0400 (EDT)

I disagree. :) See the mail I sent you off list.  I don't want to go into this
on list, because it truly is too far off topic. :)

Tom

On Wed, 25 Apr 2001, Nathan Hurst wrote:

> On Tue, 24 Apr 2001, Tom Kacvinsky wrote:
>
> > I hope this is what Richard meant -- find the zeros of the first 
> > deriviative,
> > because at an inflection point, a curve does not necessarily change 
> > monoticity.
> > In fact, I *believe* (but have no theorem to cite) that a curve cannot have 
> > a
> > local max/min at a point of inflection, and vice versa.
>
> A common misconception.  y=x^4 is a trivial counter example.
>
> HTH,
> njh
>




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