[ODE] Ragdoll performance with OpenDE

[Noley Edge]

Hmmm....Martin what a grand title!!! I have a very
close friend who has the same name.

Yes,I called setAnchor with the world coordinates of
the connection point between the two bodies as the
location.

I have also set hi and lo stop parameters as well as
global and hinge erp and cfm values.  Doing this has
helped, but I stil have the problem of the joints
coming apart.


--- "Martin C. Martin" <martin at metahuman.org> wrote:
> Did you call setLocation() on the joints?  Did you
> remember that their 
> location is in world coordinates, not relative to
> the bodies?
> 
> - Martin
> 
> Noley Edge wrote:
> 
> > I am attempting to do something similar and have
> run
> > into problems that I have posted here previously.
> I
> > have defined joints - hinge and ball type. My
> ragdolls
> > collapse to the ground when the simulation begins.
> 
> > Also, when my ragdoll collidies with anything the
> > geomtries come apart and are jetisoned off to
> > neverland. I can't seem to keep the "ball in the
> > socket" or the hinges "together".  Very
> frustrating.
> > 
> > Can you give me some examples of the parameters
> that
> > you defined for your joints (axis, anchor, erp,
> > cfm,lowstop, histop, etc.)?  
> > 
> > Are all of the geometries for a ragdoll in a
> single
> > space? Single joint group?
> > 
> > Do you have to do anything manually to maintain
> the
> > joints after collision?  
> > 
> > 
> > Any help is greatly appreciated.
> > 
> > 
> > --Noley
> > 
> > 
> >
>
------------------------------------------------------
> > 
> > Date: Tue, 13 Jan 2004 12:10:31 +0500
> > From: "Mohsin Hasan" <mohsin.hasan at trivor.com>
> > Subject: [ODE] Ragdoll performance with OpenDE
> > To: <ode at q12.org>
> > Message-ID:
> > <008201c3d9a4$54df7360$6a01c80a at trivor.com>
> > Content-Type: text/plain;	charset="US-ASCII"
> > 
> > Hi,
> > 
> > I'm new to OpenDE. I've done some work with
> Tokamak
> > but I really like 
> > the
> > feature set offered by ODE so I thought of
> switching
> > to ODE. I tried to
> > implement a Ragdoll demo with ODE with 10 Bones (9
> > joints). The demo 
> > seems
> > to work fine. The only issue I have is
> performance. I
> > mean I create 5
> > Ragdolls and the performance of the simulation
> starts
> > to stall. I 
> > haven't
> > done anything fancy yet, just added simple hinge
> > joints. ODE is built 
> > in
> > single precision mode, MAX_CONTACT points for
> > collision is only 3 and I 
> > am
> > using dWorldStepFast1 method with only 8
> iterations to
> > get extra bit of
> > speed but nothing seems to help. On the other hand
> my
> > Tokamak demo can
> > easily manage 40 Ragdolls (same configuration)
> without
> > any major 
> > hiccups. 
> > 
> > My question is. Is ODE not suitable to implement
> > Ragdoll or commercial
> > quality game physics yet due to speed constraints?
> Is
> > there anything 
> > being
> > done to increase the performance? I know there are
> a
> > few experimental
> > functions to auto disable bodies like in Tokamak
> but
> > this will only 
> > help
> > once a body is in a resting state. If most of the
> > objects (Ragdolls) 
> > are
> > moving (falling) speed is just unbearably slow.
> > 
> > Regards,
> > Mohsin
> > 
> > 
> > -----------------
> > 
> > 
> > 
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Hotjobs: Enter the "Signing Bonus"
> Sweepstakes
> > http://hotjobs.sweepstakes.yahoo.com/signingbonus
> > _______________________________________________
> > ODE mailing list
> > ODE at q12.org
> > http://q12.org/mailman/listinfo/ode
> 



__________________________________
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
http://hotjobs.sweepstakes.yahoo.com/signingbonus