ODE physics issues

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ODE physics issues

Paul Fishwick
I don't know how many of you try out the bleeding edge (git checkouts), but
something bad has happened with the opensim physics as a result of
apparent changes
to the physics API sometime in between 10/19 (the checkout where the
flailing
stops, and the ODE physics is quite stable) and today 10/28.

A checkout as of an hour ago with the default ODE settings (except for
av_capsule_tilted = false) has the avatar:

 * not being able to walk through double, open, doors
 * bouncing when page-down  (or C) is pressed so that the avatar meets
the ground (the avatar
    used to correctly "stop flying" and land on the ground). Instead,
the avatar never stops
    flying and just bounces back up.
 * walking through (instead of up) stairs
 * walking horizontally on air (for some time) instead of down stairs

I may eventually file a mantis, but wanted to see if others experienced
this.

System: Linux 64-bit

-p

--
Dr. Paul A. Fishwick           E-Mail: [hidden email]
Dept. of Computer & Info       Phone & FAX: (352) 392-1414
 Science and Engineering       WWW: http://www.cise.ufl.edu/~fishwick
University of Florida          (PGP Key available at above WWW address)
P. O. Box 116120
332 Bldg. CSE, Gainesville, FL 32611-6120

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Re: ODE physics issues

LaeMing
The landing failure issue is present on my recent builds from the SVN mirror
of GIT. Haven't noticed the others, but my sim is constructed such that I
likely wouldn't encounter them. Have also noticed unusually high upward
bounciness when getting close to near-vertical terrain.

On Thursday October 29 2009 05:52:27 Paul Fishwick wrote:

> I don't know how many of you try out the bleeding edge (git checkouts), but
> something bad has happened with the opensim physics as a result of
> apparent changes
> to the physics API sometime in between 10/19 (the checkout where the
> flailing
> stops, and the ODE physics is quite stable) and today 10/28.
>
> A checkout as of an hour ago with the default ODE settings (except for
> av_capsule_tilted = false) has the avatar:
>
>  * not being able to walk through double, open, doors
>  * bouncing when page-down  (or C) is pressed so that the avatar meets
> the ground (the avatar
>     used to correctly "stop flying" and land on the ground). Instead,
> the avatar never stops
>     flying and just bounces back up.
>  * walking through (instead of up) stairs
>  * walking horizontally on air (for some time) instead of down stairs
>
> I may eventually file a mantis, but wanted to see if others experienced
> this.
>
> System: Linux 64-bit
>
> -p
>

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Re: ODE physics issues

Ursula MATOVA
In reply to this post by Paul Fishwick
Hi Paul,

Same in my case, Linux x64

I have really no time to make a good test report right now,
The only thing I noticed on the console id : many many errors related  
to "retreive profile information" from the database.
This could be linked to that problem.

Next WE, I'll try to play with a fresh/empty database, with the latest  
trunk, maybe something goes wrong with MySQL ... it's just an idea.

Regards,
Ursula.

Le 28 oct. 09 à 19:52, Paul Fishwick a écrit :

> I don't know how many of you try out the bleeding edge (git  
> checkouts), but
> something bad has happened with the opensim physics as a result of
> apparent changes
> to the physics API sometime in between 10/19 (the checkout where the
> flailing
> stops, and the ODE physics is quite stable) and today 10/28.
>
> A checkout as of an hour ago with the default ODE settings (except for
> av_capsule_tilted = false) has the avatar:
>
> * not being able to walk through double, open, doors
> * bouncing when page-down  (or C) is pressed so that the avatar meets
> the ground (the avatar
>    used to correctly "stop flying" and land on the ground). Instead,
> the avatar never stops
>    flying and just bounces back up.
> * walking through (instead of up) stairs
> * walking horizontally on air (for some time) instead of down stairs
>
> I may eventually file a mantis, but wanted to see if others  
> experienced
> this.
>
> System: Linux 64-bit
>
> -p
>
> --
> Dr. Paul A. Fishwick           E-Mail: [hidden email]
> Dept. of Computer & Info       Phone & FAX: (352) 392-1414
> Science and Engineering       WWW: http://www.cise.ufl.edu/~fishwick
> University of Florida          (PGP Key available at above WWW  
> address)
> P. O. Box 116120
> 332 Bldg. CSE, Gainesville, FL 32611-6120
>
> _______________________________________________
> Opensim-users mailing list
> [hidden email]
> https://lists.berlios.de/mailman/listinfo/opensim-users

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ODE physics issues (part 2)

Paul Fishwick
In reply to this post by Paul Fishwick
Based on a checkout of the code just now (5:30PM EST, Oct. 30), it seems
that there
have been some improvements to the physics code; however, there are problems
remaining compared with the checkout on 10/19, where there are no physics
issues (default ODE values from 10/19's OpenSim.ini--I checked today's
OpenSim.ini.example, and didn't see any differences in the ODE section
regarding
variables): This setting is the only non-default:     av_capsule_tilted
= false.

  * I still am unable to move through two large doorways. There are no
phantom or
     transparent prims blocking the way--the avatar simply cannot go
through these
     wide open doorways,  and is blocked by something, but not sure what
since there
     is no blocking geometry. This means I cannot enter these two buildings.

  * While walking up stairs appear to work reasonably well, walking down
stairs is
     not possible -- the avatar ends up flying down the stairs without
touching the
     steps, even if going slowly.

   * The mesh collision problems (walking through stairs) seem to have  
been solved

   * Bounce still happens when flying, and pressing Page-Down or C, but
not as
      often. In the last git checkout, the bounce always occurred. Now,
after pressing C
      the avatar sometimes bounces back up and then one must press C
again to stop
      flying. Sometimes, I must press C 3 or 4 time in a row to stop
bouncing back up.

   * The feet, rather than overing a little above the ground looks much
better, although now
       the feet are ever so slightly in the ground (i'd say about the
latter quarter to
       half of both feet).

NOTE; none of these conditions exist in the 10/19 checkout

p

Paul Fishwick wrote:

> I don't know how many of you try out the bleeding edge (git
> checkouts), but
> something bad has happened with the opensim physics as a result of
> apparent changes
> to the physics API sometime in between 10/19 (the checkout where the
> flailing
> stops, and the ODE physics is quite stable) and today 10/28.
>
> A checkout as of an hour ago with the default ODE settings (except for
> av_capsule_tilted = false) has the avatar:
>
> * not being able to walk through double, open, doors
> * bouncing when page-down  (or C) is pressed so that the avatar meets
> the ground (the avatar
>    used to correctly "stop flying" and land on the ground). Instead,
> the avatar never stops
>    flying and just bounces back up.
> * walking through (instead of up) stairs
> * walking horizontally on air (for some time) instead of down stairs
>
> I may eventually file a mantis, but wanted to see if others
> experienced this.
>
> System: Linux 64-bit
>
> -p
>


--
Dr. Paul A. Fishwick           E-Mail: [hidden email]
Dept. of Computer & Info       Phone & FAX: (352) 392-1414
 Science and Engineering       WWW: http://www.cise.ufl.edu/~fishwick
University of Florida          (PGP Key available at above WWW address)
P. O. Box 116120
332 Bldg. CSE, Gainesville, FL 32611-6120

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