[Insight-users] Interactive Finite Difference

[Brady McCary]

Insight-users,

This is an ITK+VTK question.

What is the standard way to connect ITK+VTK to have an interactive
rendering/plotting of the solution to a FiniteDifferenceImageFilter
(or any sequence of images for that matter)? It seems there are at
least two ways:

Method 1:

1. Iterate a small number of steps with ITK.
2. Render the result with VTK.
3. Repeat.

Method 2:

1. Subclass the appropriate Filter and perform rendering in the
InitializeIteration function call.

Method 1 has the drawback that the state of the Filter has to be
copied back and forth or otherwise managed across invocations. Method
2 seems like a hack.

Please also note that the ``Getting Started with ITK + VTK''
presentation appears to be out of date because the code it presents
does not compile with recent versions of ITK and VTK (specifically,
the header itkImageToVTKImageFilter.h is no longer present).

Brady