[PD] tabread4~ "broken" interpolation algorithm - was Re: Max Smoother Audio than Pd?
Matteo Sisti Sette
matteosistisette at gmail.com
Mon Mar 29 14:35:39 CEST 2010
By the way tabread4c~ is not in Pd Extended, is it?
Roman Haefeli escribió:
> On Mon, 2010-03-29 at 13:49 +0200, Matteo Sisti Sette wrote:
>
>> Claude wrote:
>> > If you use [tabread4] to interpolate graphical
>> > parameters for animations, the discontinuities in the derivatives are
>> > really obvious.
>> [....]
>> > But IMHO if you're doing piecewise cubic interpolation, it's a bit
>> > of a nonsense to have a cubic that goes through all 4 points when
>> > it's only being used between the inner-most 2 points
>>
>> Well using 4 points to interpolate the curve that goes between the two
>> inner points should guarantee the absence of discontinuities in the
>> first (and second?) derivative; that should be the purpose. Now if there
>> actually are discontinuities then there must be some trivial error in
>> the equation, no????
>>
>> Or am I missing something???
>
> Check this thread:
> http://lists.puredata.info/pipermail/pd-list/2008-06/062878.html
>
> Roman
>
>
--
Matteo Sisti Sette
matteosistisette at gmail.com
http://www.matteosistisette.com
More information about the Pd-list
mailing list