Re: [PlayerStage-Gazebo] sonar problem in gazebo 5.0 world

[Nate Koenig <natekoenig@gm...>]

Hi Cheang,

Gazeno 0.5 will either display all the rays or none, includes the
sonar device. I'll put this on my todo list, but a summer job cramps
the turn around time.

You can comment out the sonar code in the Pioneer2AT model as a quick hack.

-nate

On 6/11/05, Cheang Kaijiun <kaijiun83@...> wrote:
> Hello ,I'm just work out a simple project using the gazebo 5.0 to let the
> pioneer2AT robot move around with sickLMS200 .I attempted to let the
> sickLMS200's blue laser rays to be displayed in the screen .So i set the
> observer cam's display ray to be true .=20
> So far ,the things works out perfectly .But the observer cam's also displ=
ay
> the built-in sonar's laser ray .That seems really bad for me because i ne=
ed
> to record a video that only have sickLMS200 laser rays .=20
>  =20
> I read the Gazebo 4.0 documentation and found out that sonar device was
> excluded in the pioneer2AT before .But in Gazebo 5.0 ,they are all combin=
ed
> together and I couldn't find any worldfile attributes that manage to disa=
ble
> the sonar device(or at least let the sonar laser ray range to be very sma=
ll)
> .=20
>  =20
> Can anyone tell me how to set it in Gazebo 5.0?Thanks a lot !!=20
> =20
>=20
>  ________________________________
> Yahoo! Mail
>  Stay connected, organized, and protected. Take the tour=20
>=20
>

Re: [PlayerStage-Gazebo] suggestion on nvidia grpahics card

[Nate Koenig <natekoenig@gm...>]

Hello,

Jonathan is correct. Unless you're creating worlds with large triangle
counts, the main bottleneck is the CPU. Dynamic simulation and
collision detection are both expensive, and run on the CPU.

You're graphics card is somewhat old, but you'll probably get more
bang for your buck from a new CPU.

-nate

On 6/16/05, Jonathan ILIAS <jonathan.ilias@...> wrote:
> Yiannis Gatsoulis wrote:
> > I am thinking of purchasing an nvidia card as currently I am using a
> > GeForce2 MX which is kind of slow with gazebo. I looked on previous
> > posts and found a couple of posts suggesting that quadro will do the jo=
b
> > with even 100 robots. But since I do not have the budget and I only nee=
d
> > a few robots maximum but operating in  a kind of loaded environment I
> > was thinking of buying a more modest FX5000 (5200, 5500) series. Has
> > anyone any experience with these or another suggestion?
>=20
> AFAIK, I think the number of robots does not alter significantly 3D
> rendering performances. Rendering is more affected by :
> - the number of cameras
> - the number of polygons
> - using massively skins
> - using textures
>=20
> I bought a Quadro FX3400 to be able to have many (a dozen of) robots
> with embedded camera. But with one or two cameras at common refresh rate
> (about 25 fps), rendering performances were correct with :
> - a GeForce 2 GTS
> - a GeForce 3 GTS
> - a GeForce MX 440
>=20
> You may want to consider CPU performances for reliability of physics
> simulation. They consume less CPU than rendering, but for a medium
> complexity simulation at 1000 Hz, it uses 30~40% of CPU time on my
> Pentium IV 3,2 Ghz computer.
>=20
> I had no experience with GeForce FX series, but I hope my experience
> will help you to find the hardware you need :)
>=20
> --
> Jonathan ILIAS, assistant p=E9dagogique
> http://www.eseo.fr/~jilias/
> ESEO
> 4, rue Merlet de la Boulaye
> BP 30926 - 49009 ANGERS cedex 01 - FRANCE
> t=E9l : 02 41 86 67 60
>=20
>=20
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
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>

Re: [PlayerStage-Gazebo] suggestion on nvidia grpahics card

[Jonathan ILIAS <jonathan.ilias@es...>]

Yiannis Gatsoulis wrote:
> I am thinking of purchasing an nvidia card as currently I am using a=20
> GeForce2 MX which is kind of slow with gazebo. I looked on previous=20
> posts and found a couple of posts suggesting that quadro will do the jo=
b=20
> with even 100 robots. But since I do not have the budget and I only nee=
d=20
> a few robots maximum but operating in  a kind of loaded environment I=20
> was thinking of buying a more modest FX5000 (5200, 5500) series. Has=20
> anyone any experience with these or another suggestion?

AFAIK, I think the number of robots does not alter significantly 3D=20
rendering performances. Rendering is more affected by :
- the number of cameras
- the number of polygons
- using massively skins
- using textures

I bought a Quadro FX3400 to be able to have many (a dozen of) robots=20
with embedded camera. But with one or two cameras at common refresh rate=20
(about 25 fps), rendering performances were correct with :
- a GeForce 2 GTS
- a GeForce 3 GTS
- a GeForce MX 440

You may want to consider CPU performances for reliability of physics=20
simulation. They consume less CPU than rendering, but for a medium=20
complexity simulation at 1000 Hz, it uses 30~40% of CPU time on my=20
Pentium IV 3,2 Ghz computer.

I had no experience with GeForce FX series, but I hope my experience=20
will help you to find the hardware you need :)

--=20
Jonathan ILIAS, assistant p=E9dagogique
http://www.eseo.fr/~jilias/
ESEO
4, rue Merlet de la Boulaye
BP 30926 - 49009 ANGERS cedex 01 - FRANCE
t=E9l : 02 41 86 67 60

[PlayerStage-Gazebo] suggestion on nvidia grpahics card

[Yiannis Gatsoulis <menig@le...>]

Hello,

I am thinking of purchasing an nvidia card as currently I am using a 
GeForce2 MX which is kind of slow with gazebo. I looked on previous 
posts and found a couple of posts suggesting that quadro will do the job 
with even 100 robots. But since I do not have the budget and I only need 
a few robots maximum but operating in  a kind of loaded environment I 
was thinking of buying a more modest FX5000 (5200, 5500) series. Has 
anyone any experience with these or another suggestion?

Cheers.