[vtkusers] Rendering of deformable volumentric data

[Dirk Fortmeier]

Hi David,

but it should be possible to create this texture describing the
deformation using cuda? Think I will do as you suggest.
Here is something else: I think it is not possible to define several
color transfer functions for a single volume (and selecting the transfer
function by different labels for the volume), is this true?

Regards,

Dirk

On Wed, 2011-03-09 at 06:53 -0700, David Gobbi wrote:
> Hi Dirk,
> 
> The only way to do this as fast as you would need, is to modify an
> existing vtkVolumeMapper.  I would advise against CUDA since
> VTK does not use CUDA, so you would have to start from scratch.
> If you go with shaders, then you can use vtkGPUVolumeMapper
> as a starting point and add a texture that describes the deformation.
> 
>  - David
> 
> 
> On Wed, Mar 9, 2011 at 2:21 AM, Dirk Fortmeier
> <fortmeier at imi.uni-luebeck.de> wrote:
> > Hi David,
> >
> > that worked as well :) Thanks. I see, this method really isn't as fast
> > as I need it to be. Since I will only have to deform small parts of the
> > image data and I need interactivity I probably will have to write some
> > code, maybe some GPU code... Can I write CUDA Code for this or do I have
> > to write a shader? Is there a way to work with vtkImageData on the GPU?
> >
> > Regards,
> > Dirk
> >
> > On Tue, 2011-03-08 at 05:38 -0700, David Gobbi wrote:
> >> You should be able to do this by calling Modified() on any of these:
> >> vtkImageReslice, vtkGridTransform, or the vtkImageData.  You
> >> probably won't achieve real interactive speeds, though.  For that
> >> you would have to write a volume mapper that applies the deformation
> >> as part of the ray cast operation.
> >>
> >>  - David
> >>
> >>
> >> On Tue, Mar 8, 2011 at 4:31 AM, Dirk Fortmeier
> >> <fortmeier at imi.uni-luebeck.de> wrote:
> >> > Hi David,
> >> >
> >> > thanks for the reply, worked out of the box. Now I have the problem that
> >> > changing the displacement grid interactively does not result in a newly
> >> > deformed volume. How do I force the pipeline to update?
> >> >
> >> > Regards,
> >> > Dirk
> >> >
> >> > On Mon, 2011-03-07 at 13:56 -0700, David Gobbi wrote:
> >> >> Hi Dirk,
> >> >>
> >> >> The vtkGridTransform is can be used to deform a volume, and I have
> >> >> also written a B-spline transform for VTK that you can find in the VTK
> >> >> Journal.  You can deform the volume with vtkImageReslice (by setting
> >> >> the ResliceTransform to a deformable transformation), and then pass the
> >> >> output of vtkImageReslice to a volume mapper.
> >> >>
> >> >>  - David
> >> >>
> >> >>
> >> >> On Mon, Mar 7, 2011 at 3:16 AM, Dirk Fortmeier
> >> >> <fortmeier at imi.uni-luebeck.de> wrote:
> >> >> > Hi all,
> >> >> >
> >> >> > is there already a way in vtk or vtk-edge to render deformed volumetric
> >> >> > objects (using a lattice or a field of displacements for instance)? Did
> >> >> > someone on the list tried to implement something like that?
> >> >> >
> >> >> > Regards,
> >> >> > Dirk
> >> >> > --
> >> >> > Dirk Fortmeier <fortmeier at imi.uni-luebeck.de>, PhD Student
> >> >> >
> >> >> > Institute of Medical Informatics
> >> >> > Graduate School for Computing in Medicine and Life Sciences
> >> >> > University of Lübeck
> >> >> >
> >> >> > Building 64, 2F, Room 4
> >> >> > Ratzeburger Allee 160
> >> >> > 23538 Lübeck
> >> >> > Germany
> >> >> >
> >> >> > Tel.:+49 (451) 500-5635
> >> >> > Fax.:+49 (451) 500-5610
> >> >> >
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> >> >
> >> > --
> >> > Dirk Fortmeier <fortmeier at imi.uni-luebeck.de>, PhD Student
> >> >
> >> > Institute of Medical Informatics
> >> > Graduate School for Computing in Medicine and Life Sciences
> >> > University of Lübeck
> >> >
> >> > Building 64, 2F, Room 4
> >> > Ratzeburger Allee 160
> >> > 23538 Lübeck
> >> > Germany
> >> >
> >> > Tel.:+49 (451) 500-5635
> >> > Fax.:+49 (451) 500-5610
> >> >
> >> >
> >
> > --
> > Dirk Fortmeier <fortmeier at imi.uni-luebeck.de>, PhD Student
> >
> > Institute of Medical Informatics
> > Graduate School for Computing in Medicine and Life Sciences
> > University of Lübeck
> >
> > Building 64, 2F, Room 4
> > Ratzeburger Allee 160
> > 23538 Lübeck
> > Germany
> >
> > Tel.:+49 (451) 500-5635
> > Fax.:+49 (451) 500-5610
> >
> >

-- 
Dirk Fortmeier <fortmeier at imi.uni-luebeck.de>, PhD Student

Institute of Medical Informatics
Graduate School for Computing in Medicine and Life Sciences
University of Lübeck

Building 64, 2F, Room 4
Ratzeburger Allee 160
23538 Lübeck
Germany

Tel.:+49 (451) 500-5635
Fax.:+49 (451) 500-5610