[Opensim-dev] PhysX vs. BulletSim vs. ODE

[Michael Emory Cerquoni]

I totally agree, my entire point was that there are much lower performance
issues than the physics engine, doesn't matter if the physics engine can
handle 100,000 objects or not opensimulator can not adequately update the
viewer, very much probably because of the HTTP server, totally agree, if my
wording was misleading I apologize.  I however do not agree with the
assessment being made about bulletsim, I have seen much higher numbers than
what is being shown here, I would like to see another run added to these
results with BulletSim configured to run in its own thread and not the main
simulator heartbeat loop, you would see much different results I suspect,
If anyone needs to see a actual demonstration of a simulator with 10's of
1000's of physical objects in BulletSim i can certainly demonstrate it.

On Wed, Feb 3, 2016 at 12:12 PM, Cinder Roxley <cinder at alchemyviewer.org>
wrote:

> On February 3, 2016 at 10:02:57 AM, Michael Emory Cerquoni (
> nebadon2025 at gmail.com) wrote:
>
> semantics, whatever the limitation is OpenSimulator can't update the
> viewer with more than about 1000 objects, I do all of my tests locally on
> 1000Mbit network, so if thats not enough what is? maybe I need 10TB network?
>
> Not semantics, accuracy matters when you’re placing blame on the wrong
> components. The fact that you even see objects rubberbanding is enough to
> know the viewer is capable of rendering those scenes. It’s trying to
> predict where that object is going when it hasn’t received that object’s
> next update. I can rez 3,500 objects in Second Life before seeing this
> behavior. It’s far lower in OpenSim because the HTTP/UDP server is crap.
> Convenient, but none-the-less crap under load.
>
> Naturally, you aren’t going to see people rezzing 3,500 balls and dropping
> them in a real world scenario, but you may have 10,000 physical but not
> actively thrown around objects in a scene, and bullet sim is less than
> happy when this happens.
> --
> Cinder Roxley
> Sent with Airmail
>
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>


-- 
Michael Emory Cerquoni
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