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List:       opensim-dev
Subject:    [Opensim-dev] Attached Linksets and Collisions? (on SVN 10029)
From:       melanie () t-data ! com (Melanie)
Date:       2009-07-18 18:30:35
Message-ID: 4A6214CB.4030906 () t-data ! com
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I believe you have just found the issue that is making lbsa crash! 
Physics activity on login is taking it down to unusable levels, and 
this might just be it. Of course, attachments shouldn't have a 
physics actor at all but from what you are saying, they get one. Now 
all the universe makes sense. 42!!!

Melanie

John Sheridan wrote:
> Gang,
>   Before I plug this into Mantis, I wanted to confirm this with the 
> developers.  Recently I've been noticing that after teleporting in or 
> attaching something my avatar has been getting bumped / tossed around 
> quite a bit.  It occurred to me, that this seems like its typically a 
> physical reaction - as if one were to be hit with a physical prim or 
> collide into a static prim. So I looked up the top colliders in the 
> estate tools and found a whole bunch of colliding prims (~300 in total) 
> all at the same location and owned by me.  Which was strange enough on 
> its own given the sim was empty of prims other then what was attached to 
> my avatar.
> 
>   So to test I removed all of my attachments then suddenly the 
> collisions cleared.  When I re-attached everything they returned.  To 
> dig a bit deeper, I rezzed my hair and shoes to the ground, and found 
> that everything was normal, and the physics option was not ticked.  Out 
> of curiosity, I set the hair and both shoes to phantom, took them back 
> into inventory, then re-attached.  Surprisingly, no more collisions! 
> 
>   From the looks of this it seems that when attached, prims are either 
> becoming physical and colliding with one another and the avatar, or more 
> likely are remaining normal / static and just colliding with the avatar 
> since they're not moving or flying haphazardly about as is typical of a 
> physical prim when bumped.
> 
>   Upon further testing though, I did however discover something rather 
> interesting.  So far I've only tested with the skull attachment point, 
> but when a single prim is attached it acts normally.  The avatar is not 
> bumped when it rezzes and no collisions show in the estate tools.  
> However, when two or more prims are linked and then attached the avatar 
> is bumped around and it seems that only the prims in the linkset that 
> are touching the avatar begin to register collisions within the estate 
> tools. 
> 
> To reproduce this:
> 
> 1 - rez a single prim to the ground
> 2 - take to inventory
> 3 - attach to skull
> 
>  - Check the estate tools and no collisions show.
> 
> 1 - rez several prims to the ground
> 2 - link them
> 3 - take to inventory
> 4 - attach to skull
> 
>  - Check the estate tools and only the prims in the linkset which are 
> touching the avatar will show.
> 
> 1 - re-rez the linkset to the ground
> 2 - tick the phantom checkbox
> 3 - take to inventory
> 4 - attach to skull.
> 
>  - Check the state tools and no collisions show.
> 
> I wonder if per chance this is related to the recent oddness with logins 
> / teleports / sim crossings where ODE has been going batty? 
> 
> Thanks, :)
> 
>  - John / Orion Pseudo
> _______________________________________________
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> https://lists.berlios.de/mailman/listinfo/opensim-dev
> 
> 


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