[Insight-developers] testing modified times of process objects

[Will Schroeder]

Hi Josh-

The way it's supposed to work is that the filter superclasses will take 
care of all of that for you, and only invoke Execute() when the filter is 
out of date. For this to work properly, it's very important to use Set/Get 
macros which take care of sending a Modified() to the filter if something 
changes (or of course you can do that yourself).

Will

At 03:07 PM 9/20/00 -0400, Josh Cates wrote:
>Hello folks,
>
>How can I test a filter to see if it has been modified since its Execute()
>method was last called?
>
>For example say I want to do something like:
>
>  MyFilterClass::Execute()
>  {
>    if ( this->HasBeenModifiedSinceLastExecuteCall() )
>    {
>      this->RecalculateSomeFilterParameters();
>    }
>
>    Filter();
>  }
>
>
>Josh.
>+--+--+--+--+--+--+--+--+--+--+--+--
>  Josh Cates
>  Dept. of Electrical Engineering
>  University of Tennessee, Knoxville
>  Email: jecates at utk.edu
>  Phone: (865) 974-0694
>  URL:   www.cs.utk.edu/~cates
>--+--+--+--+--+--+--+--+--+--+--+---
>
>
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