[PD] better tabread4~

[Mathieu Bouchard]

On Tue, 24 Jun 2008, Charles Henry wrote:

> I see no problem with shortening the names, because it's not practical 
> to name these things concisely, e.g. 
> "tabread4_continuous_first_derivative~" or "tabread4_anti_aliasing~"

"continuous first derivative" is listed as "continuously differentiable" 
in the list of meanings of this abbreviation: 
http://en.wikipedia.org/wiki/C1

> I think it's best to consider making a library of tabread4~ 
> alternatives, and later consider moving the different interpolation 
> schemes to tabread4~ methods, if it's worth-while.

I don't think that more than one alternative will be necessary. For 
4-point table lookups that go through all the original points, I don't 
know why anyone would aim lower than a C2 piecewise-polynomial. 
Unfortunately, it would be somewhat too late to just call it [tabread4~]. 
Or not.

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