[vtkusers] axis equal for vtk?

[Imre Goretzki]

Hey guys,

here is a 2D example of what I wanted to do. I think data transformation 
would not be the correct way of doing this.


Am 05.12.2015 um 09:35 schrieb Imre Goretzki:
> Cory,
>
> is it possible to change the tick of the axes? Right know using the 
> transform filter is equivalent to the second image. Unfortunately that 
> is not what I would like to have. I think the best way to do this is 
> to change to tick of the Z-Dimension.
>
> The image has the dimensions 520x520x47. So the tick for x and y is 1, 
> for z it should be 47/520. I don't want to change the data.
>
> Imre
>
> Am 04.12.2015 um 20:56 schrieb Cory Quammen:
>> Imre,
>>
>> Your best bet is probably to transform the data itself rather than 
>> the user transform of the actors.
>>
>> vtkSmartPointer<vtkTransformFilter> transformFilter = 
>> vtkSmartPointer<vtkTransformFilter>::New();
>> transformFilter->SetTransform(axis);
>> transformFilter->SetInputData(<your input data>);
>>
>> HTH,
>> Cory
>>
>> On Fri, Dec 4, 2015 at 1:48 PM, Imre Goretzki 
>> <goretzki.imre at gmail.com <mailto:goretzki.imre at gmail.com>> wrote:
>>
>>     I have data like this:
>>     http://i.imgur.com/CR2O8Ik.png
>>     and I would like to "stretch" the Z-axis to get more like a cube
>>     visualization.
>>
>>     I used vtkTransform to transform the axes, but I would change the
>>     data if I do this. I hope you understand what I want to do, e.g.
>>     is there a possibility to change / stretch the ticks of a
>>     specific axis.
>>
>>     The vtkTransform plot stretches to much:
>>     http://i.imgur.com/DDUW91T.png
>>     The data is deformed
>>
>>     I use the vtkTransform like this:
>>     vtkSmartPointer<vtkTransform> axis =
>>     vtkSmartPointer<vtkTransform>::New();
>>     axis->Scale(1,1,10);
>>
>>     dataActor->SetUserTransform(axis);
>>     outlineActor->SetUserTransform(axis);
>>
>>     I tried using the camera with the vtkTransform, but the only
>>     thing I got from there, was an empty image or I had to zoom out
>>     greatly.
>>
>>     For matlab reference, something like this:
>>     http://de.mathworks.com/help/matlab/ref/axis.html?refresh=true
>>
>>     Would be nice if you could help me
>>
>>     Imre
>>
>>
>>     Am 03.12.2015 um 22:20 schrieb Imre Goretzki:
>>
>>         Hey guys
>>
>>         i'd like to ask you if there's a equivalent method for
>>         vtkRenderWindow for equalizing the axis, just like MATLABs
>>         axis equal. Could vtkAxesActor be helpful?
>>
>>         I hope you can help
>>
>>         Thanks
>>         Imre
>>
>>
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>>
>>
>> -- 
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>

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