[Opensim-dev] PhysX Integration into OpenSim

Tue Mar 17 15:02:13 UTC 2015

You bring up some great talking points, Michael, and I'll try to address them in a logical order:

1)  I agree the submission of one large patch is a bad idea.  We would like for the developers to be informed of our work in-situ and even participate if they want.  Since this is a major effort, we will be holding weekly IPT meetings in MOSES to discuss progress.

2)  Does the OpenSimulator project have a formal patch acceptance process?  What is your testing and QC regimen?  If you don't have these practices in place, I'd be happy to help you formulate.

3)  We are attempting to actively engage this list so that you are all aware of our work.  If you want to be involved, please speak up.

4)  We are acutely aware that we are building on open source software and abiding by all licensing terms.  Further, we have made our enhancements and grid management software available via GitHub for anyone to download and use.  We will be working from our GitHub on this physics effort and you are welcome to download the latest code at any time.  We will also be submitting patches of our progress periodically to the community once we understand what the submission process is.  https://github.com/M-O-S-E-S

I can only make the code available to you, I cannot make you use it.  We are not concerned with backwards compatibility, nor are we concerned with SL compatibility.  It is likely there will be a situation where the OS core developers may like the new performance or functionality we are working on but you may need to massage the code to align it with your requirements.

v/r -doug

Douglas Maxwell, MSME
Science and Technology Manager
Virtual World Strategic Applications
U.S. Army Research Lab
Human Research & Engineering Directorate
Simulation & Training Technology Center
(c) (407) 242-0209<tel:%28407%29%20242-0209>
________________________________
From: opensim-dev-bounces at opensimulator.org [opensim-dev-bounces at opensimulator.org] on behalf of Sean M [mondesire.sean at gmail.com]
Sent: Monday, March 16, 2015 4:40 PM
To: opensim-dev at opensimulator.org
Subject: Re: [Opensim-dev] PhysX Integration into OpenSim

Thanks for the response Michael. Our PhysX-OpenSim development is now underway. We wanted to make the announcement and let the dev community know of our plans to share the fruit of our labor.

On Mon, Mar 16, 2015 at 11:56 AM, Michael Emory Cerquoni <nebadon2025 at gmail.com<mailto:nebadon2025 at gmail.com>> wrote:
Sounds great Sean, however I must say that submitting monolithic patches into OpenSimulator is not something we tend to accept or encourage, it would be considerably better if development was actively done in smaller pieces so it could be tested on a very wide audience as development is occurring so that the OpenSimulator team can have a say in the process and help out with testing as well, I hardly speak for the entire collective but I can offer my perspective on things being involved in this project from nearly the beginning, I do look forward to seeing what you guys can come up with and I do hope you consider working closer with the OpenSimulator development team and not try to pull off this massive feat in a closed environment, I would hate to see all this work be done and then not end up in OpenSimulator code base.

On Mon, Mar 16, 2015 at 11:49 AM, Sean M <mondesire.sean at gmail.com<mailto:mondesire.sean at gmail.com>> wrote:
Greetings,

The MOSES Team has begun the integration of Nvidia's PhysX physics engine into OpenSim. The effort's motivation stems from a deep review of the capabilities PhysX can bring the simulator and a number of discovered limitations that exists with ODE and BulletSim. Abstractly, we want to improve the overall performance of physics in our grids. Specifically, we turn to PhysX for its internal multi-threaded capabilities (not just relying on physics being executed on a separate thread from the OpenSim core), optimized performance with the use of dedicated GPUs, and the potential to bring more realistic physics to the system (vehicle movement, n-bodied physics, etc). Upon completion of this effort, the integrated code will be shared with the community.

PhysX: http://www.geforce.com/hardware/technology/physx
MOSES: http://www.militarymetaverse.org/

Best regards,
Sean Mondesire, Ph.D.
MOSES: Virtual World Research Team

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Michael Emory Cerquoni

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