[vtkusers] Oblique slice of 3D image data

[Tijmen Klein]

Could you elaborate a bit on this? I'm not sure how to create the correct
4x4 matrix from the normal and the origin.

Cheers,
Tijmen

On Tue, Sep 20, 2011 at 3:44 PM, Jothy <jothybasu at gmail.com> wrote:

> You could create a vtkMatrix4x4  and set this matrix to
> vtkImageReslice->SetResliceAxes(matrix4x4).
>
> Jothy
>
>
> On Tue, Sep 20, 2011 at 1:32 PM, Tijmen Klein <T.R.Klein at student.rug.nl>wrote:
>
>> Thank you for the thip, the combination of vtkImageReslice ->
>> vtkImagemapToColors indeed gives an output that looks what I would expect :)
>> But I am having troubles setting the correct value
>> for setResliceAxesDirectionCosines(), since I only have an origin and normal
>> (no point1 point2).
>> Right now I just set the origin (SetResliceAxesOrigin()), but I don't set
>> the Direction. One strange thing that I am seeing, is that the plane is
>> rendered outside the original dataset... Would this be because I don't set a
>> proper direction? Or could it have some other reason?
>>
>> Cheers,
>> Tijmen
>>
>>
>> On Tue, Sep 20, 2011 at 1:50 PM, Jothy <jothybasu at gmail.com> wrote:
>>
>>> I would recommed vtkImageReslice to cut the imageData and to use
>>> vtkImagemapToColors with appropriate vtkLookUpTable , then map your data.
>>>
>>> Jothy
>>>
>>> On Tue, Sep 20, 2011 at 12:40 PM, Tijmen Klein <T.R.Klein at student.rug.nl
>>> > wrote:
>>>
>>>> I'm currently lost on this one. I have some 3D scalar image data, and
>>>> want to extract and display a 2D slice/cut from this. The origin and normal
>>>> of the cutting plane are obtained externally. So I construct a vtkPlane with
>>>> this information, and then apply this pipeline:
>>>>
>>>> vtkStructuredPointsReader -> vtkCutter (with vtkPlane as the cut
>>>> function) -> vtkPolyDataMapper -> vtkActor
>>>>
>>>> However, the colors that are shown on the plane don't seem to be
>>>> accurate. When I create a slice in Paraview of the same data, the colors on
>>>> the plane look completely different. Is this because Paraview uses a
>>>> textured plane for this? If so, how can I get this in VTK? I've looked at
>>>> the vtkImageReslice, but it does not really seem to be handy when you work
>>>> with an external normal and origin?
>>>>
>>>> Cheers,
>>>> Tijmen
>>>>
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>>>
>>>
>>> --
>>> Jothybasu K Selvaraj
>>> PhD Student
>>> University of Liverpool
>>> Liverpool,UK
>>>
>>>
>>
>
>
> --
> Jothybasu K Selvaraj
> PhD Student
> University of Liverpool
> Liverpool,UK
>
>
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