[vtkusers] Problem rotating vtkImageSlice

[David Gobbi]

You should also try vtkImageSliceMapper instead of vtkImageResliceMapper,
perhaps its behavior will better suit your requirements.


On Sat, Aug 27, 2016 at 11:51 AM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Rick,
>
> You're seeing this because you are doing an out-of-plane rotation on an
> image that has only one slice.  The rotation is around the image origin,
> which (in this case) is at the bottom-left corner of the image.
>
> The vtkImageResliceMapper has a SetSlicePlane() method:
> http://www.vtk.org/Wiki/VTK/Image_Rendering_Classes#vtkImageResliceMapper
> You must rotate this SlicePlane when you rotate the vtkImageSlice.
>
>  - David
>
>
>
> On Sat, Aug 27, 2016 at 10:54 AM, Richard Frank <rickfrank at me.com> wrote:
>
>> Hi,
>>
>> If I build the example
>>
>> VTK/Examples/Cxx/Images/ImageSlice
>> and add
>>
>>  imageSlice->RotateX(1);
>>
>> Which should, I think, rotate the image actor about its X axis by 1
>> degree, I instead get
>>
>> [image: PastedImage-1.png]
>>
>> which seems incorrect.
>>
>> I can rotate about Z.
>>
>> Is there something I'm not doing correctly, or is this a bug?
>>
>> I also tried RotateWXYZ(1,1,0,0) and get the same result.
>>
>> This is VTK 7
>>
>> Thanks
>>
>> Rick
>>
>>
>>
>
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