[vtkusers] Rotate vtkImageData

[KS Jothybasu]

In my case the image center is [218.0732421875, 218.0732421875, 158.75],
which I got from ImageData.GetCenter()

So you mean to say, first I translate the image,do the rotation and
translate back.

Is that right?

Thanks

Jothy

On Mon, Mar 15, 2010 at 2:26 PM, Darshan Pai <darshanpai at gmail.com> wrote:

> If the imageCenter is not (0,0,0) you need to translate the image , do the
> rotation and translate back ..
>
> Regards
> Darshan
>
> On Mon, Mar 15, 2010 at 10:15 AM, KS Jothybasu <jothybasu at gmail.com>wrote:
>
>> Hi,
>>
>> I wanted to rotate the vtkImageData and I am using vtkTransform to do
>> that. But how to rotate around the Image centre. I get the Image centre from
>> vtkImagedata.GetCenter() method. But when I view the image it seems to be
>> shifted.Here is the code
>>
>> xform=vtk.vtkTransform()
>> xform.PostMultiply()
>> #xform.RotateWXYZ(10,218.0732421875, 218.0732421875, 158.75)
>> x,y,z=Image.GetCenter
>> xform.RotateWXYZ(50,x,y,z)# rotate 50 degs
>> res=vtk.vtkImageReslice()
>> res.SetInput(Image.GetOutput())
>> res.SetInformationInput(Image.GetOutput())
>> res.SetResliceTransform(xform)
>> res.SetInterpolationModeToLinear()
>> res.Update()
>>
>> Whats wrong??
>>
>> Thanks
>>
>> Jothy
>>
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