[vtkusers] Deforming mesh.

[Mark Foskey]

Is there a standard way to render a polygonal mesh that is being
deformed over time?  I envision grabbing the point data by something
like GetPoint() or GetPointData() and then modifying it.  But it's not 
clear from the documentation that I get pointers to the actual data 
rather than a copy.

I'm also thinking I will want to subclass an InteractorStyle and use a 
Timer, but I can't find documentation for how frequently Timer events 
go off, or for what the significance of creating and destroying a timer 
is. Perhaps the documentation for CreateTimer() should be written on a 
more elementary level, even maybe with more background.  The same 
applies to the comment for vtkInteractorStyle::OnTimer() -- why does it 
only run when the mouse button is down, for instance?  (There' also is 
a small typo -- it should read "Rotate, Spin, etc", not "Rotate, 
Rotate, etc", right?)

Thanks for any help,
Mark

-- 
Mark Foskey    (919) 843-5436  Computer-Aided Diagnosis and Display Lab
mark_foskey at unc.edu            Department of Radiology, CB 7515, UNC
http://www.cs.unc.edu/~foskey  Chapel Hill, NC  27599-7515