[Developers] Calculating attributes to a given pickset

[Bert Bril]

Hi all,

Rogério wrote:

> I am trying to develop a plugin in which the user would specify the 
> atribute set and OpendTect would calculate them to a given pickset. I
> am studying the AttribCalc Class Reference but it has been a hard and
> time consuming task. Could you give me some tips to speed up my
> comprehension?

Yes the attribute Engine is pretty complex and fuzzy at the moment. 
That's why Hélène is currently finishing a total redesign of the 
Attribute Engine. She hopes to be ready around the start of August.

In the mean time, Rogério's task is not really tied to e.g. the 
AttribCalc clases. The AttribEngMan class is a front end to this kind of 
stuff. In general, it should never be necessary to poke in the internals 
of the Attribute Engine subsystem.

Moreover, I have already implemented what Rogério is trying to do; it's 
available in the development branch or the CVS access. On the user side, 
push the 'cross-plot' button in the Attribute Editor window. On the 
programmer side, look into uiAttrib/uiattribcrossplot.h and .cc. The 
uiAttribCrossPlot class uses the AttribPosVecOutputGen class to generate 
output, then allows inspection and visualisation from the uiPosDataEdit 
class.


I hope this helps.

/Bert

-- 
-- Bert Bril / OpendTect developer at dGB
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