RE: [Opengc-devel] Performance Issue( help!)

[Doyle, S. <ste...@uk...>]

Hi Damion,

Let give you a little background on this.

I am currently trying to display the guages on top of a live video display.
I have done this by creating a new guage component that consists of an
openGL texture which I am rendering the live video to using
DSVideoLib(Allows the use of Microsoft's Direct Show with openGL). It was
while I was doing this that I noticed my performance problem.

I have subsequently removed this component and started doing performance
tests on OpenGC unmodified.

I am running standalone, well I have set the datasource to be EGyro, but
nothing is physically connected to the comm port. 

I have selected the 777 pfd minus the altitude tape and the speed tape.

I have set the app rate as you suggested, but this has made no difference
i.e appUpdateRate = 1.0 / 1000.0;

My method of timming the app is primitive, I put the following code in the
draw method of ogcFLTKRenderWindow

unsigned int dwStart=GetTickCount();
this->Render();
unsigned int dwTime=GetTickCount()-dwStart;
printf("Time(ms) = %d\n",dwTime);

On 1.9GhZ P4 with 1GB RAM and an ATI RAGE 128PRO video card

I get an average of 25fps.

I have also tried it on a 2.2GHz P4, 1GB RAM and Nvidia Geforce 4 with very
similar results.

I've also tried it in both release & debug modes again there is no
difference. I get the feeling this is going to turn out to be something very
silly, but I can't think what.

Cheers

Steve

-----Original Message-----
From: Damion Shelton [mailto:da...@op...] 
Sent: 30 April 2004 17:30
To: ope...@li...
Subject: Re: [Opengc-devel] Performance Issue( help!)


Hi,

One question comes to mind immediately.... you mentioned that you 
"altered the app update rate appropriately". Was that modification of 
this line:

appUpdateRate = 1.0 / 24.0;

in main.cpp?

If you set this to be 1/1000 what happens? Also, you mention removing a 
piece of debug code - could you be more specific? Is this a debug or 
release build?

Thanks,
-Damion-


On Apr 30, 2004, at 7:55 AM, Doyle, Steven wrote:

> Hi,
>
> I've made a slight improvement(removed a piece of debug code which I 
> had
> in), I've got it up to 25fps, but that's still very low. Some of the
> standard GL benchtests which are displaying far more complex objects 
> are
> achieving 100s fps on my system. (Can't find any reference to
> glEnable(GL_LINE_STIPPLE) in the base code)
>
> I have tried it on an ATI RAGE 128 PRO & and on an Nvidia GeForce 4.
>
> What kind of framerate is everyone else getting ?
>
> Cheers
>
> Steve
>
> -----Original Message-----
> From: Dieter Polzin [mailto:dp...@ab...]
> Sent: 30 April 2004 12:49
> To: ope...@li...
> Subject: Re: [Opengc-devel] Performance Issue( help!)
>
>
> Hi,
>
> What gfx card are you using? I've experienced problems on a card using
> line stippling, ie enabling line
> stippling with glEnable(GL_LINE_STIPPLE) caused the performance of the
> card to break.
>
> Just a thought,
> Dieter
>
> Doyle, Steven wrote:
>
>> Hi Guys,
>>
>> I am experiencing a serious performance issue, and I don't understand
>> why.
>>
>> Currently I have no datasource and displaying the 777pfd. I'm getting
>> less than 10 fps !  I believe I have enabled OpenGL in fltk and I have
>> altered the app update rate appropriately. I have tried it on two
>> different machines both with good video cards. To me this is a very
>> simple display which should be incredibly quick to render.
>>
>> Any ideas ?
>>
>> Cheers
>>
>> Steve
>>
>>
>>
>
>
>
>
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---------
Damion Shelton
Carnegie Mellon University, Robotics Institute
A408-o Newell Simon Hall
412.268.3866 (office)
412.818.8829 (cell)
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http://www.cs.cmu.edu/~beowulf
---------
Your search for deep meaning in a trite and mundane workaday world 
continues. Meanwhile, 3,000 people worldwide die of malaria every day, 
you simp.



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