[Opensim-dev] New MOSES Physics Video

[Mike Chase]

There may be more optimal ways to handle explosions but irregardless it 
shouldn't cause region crashes.  So its a good test case for the region 
code in addition to physics.  Looked like there was some "jostling" 
going in between bricks as well so some of it might be many collisions 
being reported where some tuning would yield better results.

Irregardless it's an awesome start and an important test framework for 
the region server as well as a baseline for physics experiments.  Great job!

Mike


On 4/14/15 9:39 AM, Mister Blue wrote:
> Excellent testing!!
>
> Using individual bricks will cause a lot of network traffic as the 
> protocol will send position updates for every individual brick. Most 
> games do explosions with an 'explosion' effect that happens on the 
> client so all the updates don't have to go over the network. This mass 
> of updates could also be what causes the crashes where there are 
> multiple avatars as every brick movement must be sent to every avatar.
>
> == mb
>
> On Tue, Apr 14, 2015 at 6:33 AM, Michael Emory Cerquoni 
> <nebadon2025 at gmail.com <mailto:nebadon2025 at gmail.com>> wrote:
>
>     Could these test scripts be shared so testing against other
>     engines can occur as well, I would be interested to see how this
>     same test goes against ODE and BulletSim as well.
>
>     On Tue, Apr 14, 2015 at 8:18 AM, Maxwell, Douglas CIV USARMY ARL
>     (US) <douglas.maxwell3.civ at mail.mil
>     <mailto:douglas.maxwell3.civ at mail.mil>> wrote:
>
>         Good Morning, as you all know the MOSES developers are working
>         on PhysX integration into the Open Simulator to support
>         functionality currently not possible in the platform.  We are
>         a methodical group and a couple months ago I asked one of our
>         interns to work with the developers to create a series of
>         baseline physics behavior case studies.  The first case study
>         is a destructible wall caused by an explosive charge.  This
>         wall is composed of blocks that are tested at a high density
>         and a low density to simulate different destruction effects.
>
>         The goal here is to eventually have all of the prims in the
>         sim loaded with the scripts needed to react to any type of
>         random explosive charge set by the participants in the
>         training scenario.
>
>         The video can be found below:
>
>         https://youtu.be/jSofWcwWi7g
>
>         Your feedback is welcome.
>
>         Observations:
>
>         1)  Current limitations of the open simulator prevent us from
>         expanding the tests beyond a simple wall.
>
>         2)  The scripts exercise the engine well and expose
>         limitations between the sim frame rate and the physics frame rate.
>
>         3)  It is easy to crash the sim with this demonstration,
>         especially if more than a handful of people are present (more
>         than 3-4 client connections).
>
>         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>
>
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>
>
>
>     -- 
>     Michael Emory Cerquoni
>
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