[ODE] Framerate cost of adding joints !!!

[Jon Watte]

Where does VTune say you're spending your time?

Are you using an optimized releaes mode build?

Are you locked to the monitor refresh? I e, if you remove rendering, or only render every tenth frame, what happens?

Last, you don't need fixed joints for mass distribution; use dMassXxxx() to translate and add different masses into a single Mass which can be set on a single body. That's the beauty of the inertia tensor!

Cheers,

			/ h+



-----Original Message-----
From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of philippe.vaz
Sent: Monday, May 03, 2004 9:02 AM
To: ode
Subject: [ODE] Framerate cost of adding joints !!!


I use ODE to make a car simulation with DirectX9 an visualC++.NET
My computer is a Pentium4, 2.8GHz and 1Go Ram.

I have simulated a car with 3 Fixed joints for the mass repartition and 4 Hinge2 joints for the "wheels / suspensions". The simulation runs well at a framerate of 80 fps (resolution of 800*600). So I've decided to simulate a more accurate model adding 4 more joints for the "wheels / suspensions". 
My problem is that the framerate decreases dramatically to 40 fps !!!

Is it normal ??? I don't understand because I don't think that I have reached the limits of the system of ODE. 

Thanks,
Philippe VAZ


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