[ODE] gravity issues

[Erin Catto]

Increasing gravity is equivalent to scaling time. So if you change gravity,
you have to change the time step as well.

For games, you goal should be to take no more than 30-60 steps per simulated
second.

Erin

-----Original Message-----
From: ode-bounces at q12.org [mailto:ode-bounces at q12.org] On Behalf Of Tiago
Rodrigues
Sent: Saturday, November 20, 2004 11:08 AM
To: ode at q12.org
Subject: [ODE] gravity issues

Hi,
I'm doing some testing with various physics sdks.
I'm trying to check whats the behaviour of each one with the same 
examples, with real values, meaning real gravity and sizes.
For example i set gravity to -9.81 (m/s/s), and create a box stack each 
with 0.2 (m) side and 0.1 density, with  5 boxes.
I can't get a stable stack, the boxes simply start to penetrate each 
other and the stack desmantles.
If i lower the gravity to values as the ones found in the examples 
(-0.5) everything works fine.
What can i do to make the simulation work properly in the presence of 
real gravity?

thanks in avance,
Tiago.
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