Re: [Freeglut-developer] glutReshapeFunc callback does not get called if glutDisplayFunc is not set

[Diederick C. N. <dc...@gm...>]

Hi Eero,

Thanks for the insights. As long as there is any display callback,
even if its a noop, you wont get an error. For as far as I can
see/predict, your setup should still work with current trunk. But in
principle its undefined what happens when you glutSetWindow from your
render callback, I think. I am not sure if it'll work on other
platforms either...

Best,
Dee

On Wed, Apr 10, 2013 at 5:38 PM, Eero Pajarre <epa...@gm...> wrote:
> On Thu, Apr 4, 2013 at 6:40 AM, Diederick C. Niehorster
> <dc...@gm...> wrote:
>
>> Why have you organized your code this way, what is the benefit over
>> separate callbacks (or a simple if in a single display callback)?
>>
>
> (sorry for the delay in my reply)
>
> My reasons are partly historical, originally I implemented some things
> by using gamemode screen which spanned multiple display devices.
> Microsoft broke this during Vista transition, and the current way was
> probably the easies transition.
>
> Also for technical reason, my rendering consists of something like
> "scene graph phase" and  "final rendering phase(s)".  So so far I have
> kept these together behind one render callback. The views are rendered
> on a single large virtual screen I can just set the viewport to
> correct place, if multiple windows are used then I have to
> glutSetWindow.
>
> I have added dummy render callback for the additional windows, and so
> far does work. I will have to watch out when trying to update
> FreeGLUT.
>
>      Eero
>
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