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

[Dr Ramesh Ramloll]

Thanks for replying Mister. If I understand correct, I might be better off
starting with an ODE vehicle code and evolve it so that it works on
BulletSim, rather than starting with an SL vehicle code and try to make it
work on BulletSim. The path from ODE vehicle to BulletSim vehicle is
shorter than the path from SL vehicle code to BulletSim code. Let me know
If my understanding is correct. With scaling of parameters differing etc..
and not knowing what these differences are, I think it will be difficult
for me to debug based on visible behavior alone (possible but am not the
sharpest tool in the box).

On Sat, Mar 2, 2013 at 12:59 AM, Mister Blue <misterblue at misterblue.com>wrote:

> [[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>
>> , DeepSemaphore LLC <http://www.deepsemaphore.com>, Google+ profile<https://plus.google.com/103652369558830540272/about>
>>
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>
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-- 
'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>
, DeepSemaphore LLC <http://www.deepsemaphore.com>, Google+
profile<https://plus.google.com/103652369558830540272/about>
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