[vtkusers] Sharing vtkRenderer?

[Cory Quammen]

You'll also need different mappers for the different windows.

You can share the data set among the different windows - no need to
duplicate. This is because the data model classes do not have any OpenGL
context-dependent state.

- Cory

On Sun, Dec 6, 2015 at 11:52 PM, rakesh patil <prakeshofficial at gmail.com>
wrote:

> So you mean to say that, in an application if I have 4 windows, each
> window will have its own vtkRenderWindow, and each vtkRenderWindow will
> have its own renderer. Each renderer will have its own set of actors. This
> means there would exist duplicate dataset right. ? Maybe this is next
> issue, how to handle single dataset among multiple windows. Does this query
> need a new thread.?
>
> Thanks
>
>
> On Monday, December 7, 2015, Cory Quammen <cory.quammen at kitware.com>
> wrote:
>
>> Actors store some OpenGL state in the mappers they use. While it appears
>> to be possible to share some kinds of OpenGL state among the different
>> OpenGL contexts in the render windows, VTK is not designed with this in
>> mind. Hence, it is safest to have different actors for different renderers.
>>
>> HTH,
>> Cory
>>
>> On Sun, Dec 6, 2015 at 10:50 PM, rakesh patil <prakeshofficial at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> Thanks for your reply. It's just a question. Can't I share actors
>>> created by smart pointer across multiple renderers. ?
>>>
>>>
>>> On Sunday, December 6, 2015, Cory Quammen <cory.quammen at kitware.com>
>>> wrote:
>>>
>>>> Each vtkRenderWindow should have its own vtkRenderer. Also, you cannot
>>>> reliably share actors across different vtkRenderers, so each vtkRenderer
>>>> should have its own set of actors.
>>>>
>>>> - Cory
>>>>
>>>> On Sat, Dec 5, 2015 at 9:32 AM, rakesh patil <prakeshofficial at gmail.com
>>>> > wrote:
>>>>
>>>>> Hello users,
>>>>>
>>>>> Is it possible to share a common vtkRenderer object among multiple
>>>>> vtkRenderWindows? Or is it that each window should have its own renderer?
>>>>> What I need to do is show same actor in different windows but with
>>>>> different projections and viewports. Will sharing a common renderer work in
>>>>> this case?
>>>>>
>>>>> Thanks in advance
>>>>>
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>>>>
>>>>
>>>> --
>>>> Cory Quammen
>>>> R&D Engineer
>>>> Kitware, Inc.
>>>>
>>>
>>
>>
>> --
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>>
>


-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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