[Opensim-users] ODE physics issues (part 2)

[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: fishwick at cise.ufl.edu
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