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[gameprogrammer] Re: Multi-Threading in C++

Okay, nice :)

On 5/2/07, richard sabbarton <richard.sabbarton@gmail.com> wrote:

Hi Olivier,

Thank you for the feedback.  It looks like you can execute more than one
OpenGL command at a time.  I found the problem in the end.  It was actually
caused by multiple instances of my new thread being spawned.  I manage to
cap it to a single thread and I can now load my textures from files using an
array of GLuint variables in the background while I continue rendering.
There is a bit of a drop in framerate but it seems to work OK.

Thanks

Richard


On 02/05/07, Olivier Delannoy <olivier.delannoy@gmail.com> wrote:
>
> I don't think cause the opengl state is common between both threads so
> each opengl function call will act on the machine state shared in the
> driver  and on the graphic card.
>
> On 5/2/07, richard sabbarton <richard.sabbarton@gmail.com> wrote:
> > Hi All,
> >
> > I am relatively new to the list and I am still learning.  I am working
on a
> > 3D game (personal learning project at the moment) and I am trying to
spawn a
> > new thread at a certain point in my code.  The purpose of this thread is
to
> > pull objects, models and textures from files into memory (for OpenGL)
while
> > I am continuing to render in the primary thread.
> >
> > So far I have created a thread and the thread spawns OK.  It starts
running
> > but during the loading process I am getting access violation errors when
> > trying to access arrays of GLuint variables (for the textures).  At this
> > point the arrays are not in use by the primary thread so I thought I
would
> > be able to avoid using any sort of mutex.  I am still new to
multi-threading
> > and I am using the standard WINAPI CreateThread() function.
> >
> > Can anyone offer any advice on how to do this or point me to any good
> > tutorials online.
> >
> > Thanks
> >
> > Richard
>
>
> --
> Olivier Delannoy
> ATER
> PRiSM Laboratory
> Versailles University, FRANCE
>
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>





--
Olivier Delannoy
ATER
PRiSM Laboratory
Versailles University, FRANCE

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