AW: [vtkusers] reading amira data with vtk

[Seema Jaisinghani]

Patrick,

You can't read in a .am file . you have to change it
to .vtk format as I had explained earlier.

Seema
--- Patrick Schuska <schuska at dbi.udel.edu> wrote:
> Hi guys,
> I have a little big problem. What I`m going to do
> can you read below.
> 
> Now I have written some lines. I had really not much
> idea what I`m there
> was doing. I guessed and played a little bit with
> the examples.
> All the documentations are crap,  I think. However,
> I don`t understand
> them.
> Can anybody please check my program and correct some
> mistakes and what
> also important for me is, explain me, what there is
> happening.
> 
> And if somebody has a better documentations as the
> vtk.org, please let
> me know :o)..
> 
> Here is my program..
> 
> 
> 
> package require vtk
> package require vtkinteraction
> 
> 
> # Create the renderer, the render window, and the
> interactor. The
> renderer
> # draws into the render window, the interactor
> enables mouse- and 
> # keyboard-based interaction with the scene.
> #
> vtkRenderer aRenderer
> vtkRenderWindow renWin
>   renWin AddRenderer aRenderer
> vtkRenderWindowInteractor iren
>   iren SetRenderWindow renWin
> 
> # Create the reader for the data
> vtkStructuredPointsReader Preader
>     Preader SetFileName "D:/amira/ear2.am"
> 
> # Create transfer mapping scalar value to opacity
> vtkPiecewiseFunction opacityTransferFunction
>    # opacityTransferFunction AddPoint  20   0.0
>   #  opacityTransferFunction AddPoint  255  0.2
> 
> # Create transfer mapping scalar value to color
> vtkColorTransferFunction colorTransferFunction
>    # colorTransferFunction AddRGBPoint      0.0 0.0
> 0.0 0.0
>   #  colorTransferFunction AddRGBPoint     64.0 1.0
> 0.0 0.0
>    # colorTransferFunction AddRGBPoint    128.0 0.0
> 0.0 1.0
>   #  colorTransferFunction AddRGBPoint    192.0 0.0
> 1.0 0.0
>    # colorTransferFunction AddRGBPoint    255.0 0.0
> 0.2 0.0
> 
> # The property describes how the data will look
> vtkVolumeProperty volumeProperty
>   #  volumeProperty SetColor colorTransferFunction
>    # volumeProperty SetScalarOpacity
> opacityTransferFunction
>     volumeProperty ShadeOn
>     volumeProperty SetInterpolationTypeToLinear
> 
> 
> # The mapper / ray cast function know how to render
> the data
> vtkVolumeRayCastCompositeFunction  compositeFunction
> vtkVolumeRayCastMapper volumeMapper
>     volumeMapper SetVolumeRayCastFunction
> compositeFunction
>     volumeMapper SetInput [Preader GetOutput]
> 
> # The volume holds the mapper and the property and
> # can be used to position/orient the volume
> vtkVolume volume
>    volume SetMapper volumeMapper
>    #volume SetProperty volumeProperty
> 
> aRenderer AddVolume volume
> aRenderer SetBackground 1 1 1
> 
> renWin SetSize 600 600
> renWin Render
> 
> 
> # Interact with data. The Tcl/Tk event loop is
> started automatically.
> iren Initialize
> wm withdraw .
> 
> 
> 
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: vtkusers-admin at vtk.org
> [mailto:vtkusers-admin at vtk.org] Im Auftrag
> von Seema Jaisinghani
> Gesendet: Donnerstag, 9. Oktober 2003 12:03
> An: Patrick Schuska; vtkusers at vtk.org
> Betreff: Re: [vtkusers] reading amira data with vtk
> 
> 
> Hi Patrick,
> 
> I don't know how you are loading images in Amira.
> Are
> your ct images uniformly spaced or vary in z?
> Anyway,
> you will be able to get them as a stack if uniformly
> spaced by just selecting all the single files when
> loading. Amira loads them as a single object. If not
> spaced uniformly, you can still get them as a
> multichannel field by specifying the distance
> between
> every image in a text file channel.info. 
> Now save this single object as an amira mesh object
> i.e. stackname.am
> this is a binary file with amira mesh header. It is
> simply volume data. Remove this header and replace
> with vtk files header.Your header will be something
> like-
> # vtk DataFile Version 3.0
> Raw Volume Data
> BINARY
> DATASET STRUCTURED_POINTS
> DIMENSIONS  101  101  101 (these areth dimensions of
> your stack)
> ORIGIN 0 0 0
> SPACING 0.5 0.5 0.5 (this is the voxel size in your
> original stack)
> POINT_DATA 1030301
> SCALARS atomId unsigned_char 1
> LOOKUP_TABLE default
> .
> ...data
> 
> use vtkStructuredPointsReader to read this file and
> send the output to vtkStructuredPoints
> 
> Hope this helps,
> Seema
> --- Patrick Schuska <schuska at dbi.udel.edu> wrote:
> > Hi,
> > I have to represent amira objects, which I created
> > in amira out of
> > ct-slices with vtk. How can I read the images out
> of
> > amira into vtk.Is
> > it possible at all?
> > Thanks, Patrick
> > 
> 
> 
> __________________________________
> Do you Yahoo!?
> The New Yahoo! Shopping - with improved product
> search
> http://shopping.yahoo.com
> _______________________________________________
> This is the private VTK discussion list. 
> Please keep messages on-topic. Check the FAQ at:
> <http://public.kitware.com/cgi-bin/vtkfaq>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
> 
> 
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at:
> <http://public.kitware.com/cgi-bin/vtkfaq>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers


__________________________________
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
http://shopping.yahoo.com