[vtkusers] Adding a renderer vs setting its render window

[Elvis Stansvik]

2016-06-20 21:30 GMT+02:00 Ken Martin <ken.martin at kitware.com>:

> I think that comment is super old. Way back before we had proper object
> factories we would create renderers using a MakeRenderer function. The
> standard way to do it now is to create a renderer like any other VTK object
> and add it to the renderwindow. That will, as a convenience, set the
> renderwindow on the renderer as well. So that part of the comment is still
> true. You should generally not need to call SetRenderWindow as AddRenderer
> has already done it for you.
>

Alright, thanks for the clarifications (and history lesson :)) Ben.

Elvis


> Thanks
> Ken
>
>
> On Thu, Jun 16, 2016 at 7:21 AM, Elvis Stansvik <
> elvis.stansvik at orexplore.com> wrote:
>
>> What is the difference between
>>
>>     renderer.SetRenderWindow(renderWindow)
>>
>> and
>>
>>     renderWindow.addRenderer(renderer)
>>
>> ? Is it just two different ways of doing the same thing?
>>
>> Also, the docs for SetRenderWindow [1] says
>>
>> "This is automatically set when the renderer is created by MakeRenderer.
>> The user probably shouldn't ever need to call this method."
>>
>> But I couldn't find any info in the docs about a MakeRenderer. Digging in
>> the VTK source, it seems there's a vtkParallelRenderManager::MakeRenderer.
>> Is that the one the docs refers to? Could someone clarify this note in the
>> docs? Why shouldn't I need to call SetRenderWindow?
>>
>> Elvis
>>
>> [1]
>> http://www.vtk.org/doc/nightly/html/classvtkRenderer.html#ae3a6088ecdcdec6b7e0b6482974de8c2
>>
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>
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