[ODE] Drawstuff memory problem on OS X

[Bill Sellers]

Hi Bryan,

I use it quite extensively on MacOSX and can't say I've noticed any  
problems. There's certainly nothing in the code that allocates memory  
in the routine as far as I can see. Mind you I have hacked around  
with drawstuff a fair bit - I don't use the library but include the  
source directly. That way I can compile it as C++ and get rid of all  
the single/double precision duplicates and let function overloading  
handle all that for me. I don't use textures or shadows though...

Cheers
Bill

On 31 Oct 2005, at 21:41, thibodea at cs.umass.edu wrote:

> Hi -
>
> drawCylinder() in drawstuff.cpp is creating a memory leak on my OS  
> X machine
> (10.4.2).  It seems that any program that calls dsDrawCylinder(),  
> including the
> test programs built by ode (though I didn't exhaustively check them  
> all) will
> take up more and more memory as it runs.  My simulation takes about  
> 90M of VM if
> I don't draw cylinders, but will climb to over 400M of VM in a  
> minute or so if I
> am drawing 2 cylinders per time step.  I tested both the CVS  
> version and the 0.5
> release and found the same problems.  I was able to work around the  
> problem
> using gluCylinder() and gluDisk() inside of dsDrawCylinder()  
> instead of
> drawCylinder().
>
> I don't know enough about OpenGL to figure out why the the original  
> drawCylinder
> () is causing problems on OS X.  Also, I couldn't reproduce the  
> problem on a
> linux machine.  I don't know how many people actually use the  
> drawstuff
> libraries, but this problem does keep some of the example programs  
> from running
> smoothly on OS X for any length of time.
>
> If anyone can suggest a potential fix, or suggest why the original  
> function is
> problematic on OS X, I'll try to debug the original function if I  
> get a chance.
> It is also possible that other functions in drawstuff also cause  
> the same
> problem, but I haven't gone through and tested them all.  The  
> dsDrawBox()
> function seems to work OK.
>
> Bryan
>
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