[Opensim-users] lsl differences for vehicles on bulletsim vs ODE engines

[Mister Blue]

[[Full disclosure... I'm the author of BulletSim. :-) ]]
The LSL commands for the vehicles are the same for both ODE and BulletSim
-- that is, they implement the LSL functions and simple vehicle model
defined in SL[1]. That said, which functions are actually implemented
differ and the scaling of parameters differ.

BulletSim has been working at calibrating its actions to be similar to SL.
ODE had some differences from SL and thus vehicle scripts that worked in SL
didn't work the same with ODE[2]. BulletSim is trying to change that. The
os function osGetPhysicsEngineType() was added to help script writers if
they wanted to have vehicles that worked with either physics engine.

The current BulletSim vehicle functions is being tracked at
http://opensimulator.org/wiki/BulletSim/Functionality/.

BulletSim is under active development and, if there are vehicles functions
that are wrong or need different tuning, send me a note.

-- mb

[1] http://wiki.secondlife.com/wiki/Linden_Vehicle_Tutorial
[2] For instance, turning force in ODE is about 10 times smaller than in SL
so a reasonable turning value for SL would barely turn a vehicle under ODE.



On Wed, Feb 27, 2013 at 6:38 AM, Dr Ramesh Ramloll <r.ramloll at gmail.com>wrote:

> Hello,
> I was thinking that before I invest too much time in vehicles, I should
> learn from the community about lsl differences for vehicle control on the
> two different engines, bulletsim vs ODE.
> Is it perhaps better to wait for Bulletsim to get the green light before
> investing time in vehicle coding?
> Thanks
> R
>
> --
> 'Consider how the lilies grow. They do not labor or spin.'
> *Rameshsharma Ramloll* PhD, CEO CTO DeepSemaphore LLC, Affiliate *Research
> Associate Professor*, Idaho State University, Pocatello, ID 83209 Tel:
> 208-240-0040
> Blog <http://deepsemaphore.posterous.com/>, LinkedIn<http://www.linkedin.com/in/rameshramloll>
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>
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