Miller Puckette escribió:
The tabread4~ algorithm is to put a cubic through the 4 points surrounding
the input point. However, this cubic curve does not necessarily match the
next curve over in first derivative.
Oh I see! I thought it did. I confuded that technique with natural cubic
splines :$
Now I remember that in order to compute the coefficients for a cspline
you have to know in advance all the points of the table (iirc). But the
general formula for csplines doesn't assume equally spaced points...
So now i dubt is it possible at all to find the piecewise cubic that
ensures continuity of the 1st and 2nd derivatives by using 4 points at a
time? (at least in the case of equally spaced points)
thanks
m.
--
Matteo Sisti Sette
[email protected]
http://www.matteosistisette.com
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