[vtkusers] VolumeRendering Window Width and Window Level

[Aashish Chaudhary]

Right you are already using what Sankhesh suggested you. So what prevents
you from changing the transfer function if you are getting the callback?

- Aashish

On Thu, Sep 24, 2015 at 1:09 AM, Mallikarjun K <mallikarjun49 at gmail.com>
wrote:

> Hi Sankhesh,
> Thanks for your suggestions.  Actually  I want to modify the existing
>  color transfer function and Opacity transfer function interactively  on
> left mouse+move on the volume.
>
> Thank you
>
> With Kind Regards,
> Mallikarjun
>
> On Thu, Sep 24, 2015 at 3:06 AM, Sankhesh Jhaveri <
> sankhesh.jhaveri at kitware.com> wrote:
>
>> Hello Mallikarjuna,
>>
>> vtkInteractorStyleImage provides events for window level changes. See:
>> http://www.vtk.org/doc/nightly/html/classvtkInteractorStyleImage.html
>>
>> You can add an observer to the vtkCommand::WindowLevelEvent or
>> vtkCommand::EndWindowLevelEvent and change the functions as you like. On a
>> side note, if all you are changing is the window width and level, you can
>> just pass those values to
>> vtkFixedPointVolumeRayCastMapper::SetFinalColorWindow() and
>> SetFinalColorLevel().
>>
>> Hope that helps.
>>
>>
>> Warm regards,
>> Sankhesh
>>
>>
>>
>> On Wed, Sep 23, 2015 at 2:48 PM, Mallikarjun K <mallikarjun49 at gmail.com>
>> wrote:
>>
>>> Hi Aashish,
>>>
>>> I have created a simple program which does volume rendering using
>>> vtkfixedpointraycastmapper. Now what I am trying to achieve is that when I
>>> change the window/level by left mouse click+drag on the renderwindow, then
>>>  want to change the color volume characteristics by means of window/level.
>>>
>>> I used vtkInteractorstyleimage interactor style to change the
>>> window/level  on left mouse click+drag and in a call back I am getting the
>>> window and level using
>>> vtkInteractorStyleImage::GetWindowLevelCurrentPosition. Based on these w/l
>>>  I want to change/modify the color transferfunction and opacity transfer
>>> function.
>>>
>>> please can you suggest me how can I achieve it.
>>>
>>> Thank you in advance.
>>>
>>>
>>>
>>> On Wed, Sep 23, 2015 at 11:23 PM, Aashish Chaudhary <
>>> aashish.chaudhary at kitware.com> wrote:
>>>
>>>> Can you describe more in detail what you are trying to do? We have
>>>> piecewise method for transfer functions. What value you set for each step
>>>> depends on what is needed.
>>>>
>>>> - aashsih
>>>>
>>>> On Tue, Sep 22, 2015 at 12:28 AM, Mallikarjun K <
>>>> mallikarjun49 at gmail.com> wrote:
>>>>
>>>>>
>>>>> Hi Everyone,
>>>>>
>>>>> How can I set color transfer function and opacity transfer function
>>>>> based on window width and window level ?
>>>>>
>>>>>
>>>>>
>>>>> Thanks in advance..
>>>>>
>>>>> Regards,
>>>>> Mallikarjun
>>>>>
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>>>>
>>>>
>>>> --
>>>>
>>>>
>>>>
>>>> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.
>>>>   *
>>>> *| http://www.kitware.com/company/team/chaudhary.html
>>>> <http://www.kitware.com/company/team/chaudhary.html>*
>>>>
>>>
>>>
>>>
>>> --
>>> *With Kind Regards:*
>>> Mallikarjuna K,
>>> 07795531103/09908238861.
>>>
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
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>>
>
>
> --
> *With Kind Regards:*
> Mallikarjuna K,
> 07795531103/09908238861.
>
>


-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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