[Insight-developers] testing modified times of process objects

[Joshua Cates]

Hi Luis,

> About the way of knowing if some internal
> values should be recomputed,... it seems that
> you will have to keep and internal boolean
> in the filter. Put it to false each time the filter
> is executed and put it to true each time a
> parameter is changed.
> 
> It is hard to know if this is needed for all the filters.
> In general the time for computing coefficients is
> negligible with respect to the time consumed
> applying the filter.
> 
> 
> 
> 
> Luis
> 

This is the way I've done it for now.  If we find that others need this
too, maybe we can get it incorporated higher up in the class heirarchy.

Josh.