[vtkusers] Re: quadratic elements

[Mathieu Malaterre]

James C. Robinson wrote:
> Mathieu,
> 
> Thanks for your patience. I have gone back as far a r1.16 and implemented
> each fix manually into my vtkQuadraticHexahedra.cxx. I skipped Ken's one
> pertaining to the doubles. I assume that this is what you meant me to do?
> 
>  Am I to assume that these are the only fixes that are needed to be made
> since the release version of v4.2, or are there other bugs (not features)
> that have also to be altered?

Just to make sure. vtkQuadHexahedron is using internally vtkQuadQuad, 
and I corrected the shape functions:

http://vtk.org/cgi-bin/cvsweb.cgi/VTK/Common/vtkQuadraticQuad.cxx

I would suggest you apply this changes too. BTW are you using linux ?
If so try something like this:

get the CVS head of VTK, then
cvs dif -r1.21 -r1.20  vtkQuadraticQuad.cxx > jim.patch
go back to your VTK 4.2 directory
do :
patch -p0 < jim.patch

and you can do it for any arbitrary revision number.

> There is a slight problem with the following:
> 
> V4.0
> virtual vtkInteractorStyle* vtkRenderWindowInteractor::GetInteractorStyle
> ( 	  	)
> 
> V4.2
> virtual vtkInteractorObserver* vtkRenderWindowInteractor::GetInteractorStyle
> ( 	  	)
> 
> Why was this done and what do I need to do to circumvent it?

You shouldn't suffer from this:

http://vtk.org/cgi-bin/cvsweb.cgi/VTK/Rendering/vtkRenderWindowInteractor.h.diff?r1=1.89&r2=1.90

As vtkInteractorStyle derive from vtkInteractorObserver. What  did you 
try ? I guess this should only be a one line change.

HTH
Mathieu
Ps: I am CCing the list as it might interest other people.