Re: [PlayerStage-Gazebo] Black screen fixed.

[Jordi <mu...@gm...>]

In my previous mail I didn't understand how setFog works.
Now I do. Just comment that line and you will have your sky back.



On Dec 28, 2007 5:43 AM, Sawyer <to...@to...> wrote:

> YAY!
>
> Replacing line 180 with:
> this->sceneMgr->setFog(Ogre::FOG_LINEAR, *this->backgroundColor, 0, 0.1000
> ,
> 1000);
> Allows me to run most of the provided world files. Good job Jordi!
>
> I am still not able to run either bandit.world or bandit2.world they both
> die
> with seg faults, and terrain.world dies on a missing pioneer 2 controller.
> But I am able to run all of the other worlds.
>
> On an unrelated note, I had to manually copy the Media and worlds
> directories
> over, the old ones did not get overwritten, this may be desired behavior
> but
> I thought I would bring it up.
>
> Also while the skydomes appear to be made of the material "CloudSky" all
> of my
> skys are black.
>
> Sawyer
>
> On Thursday 27 December 2007 10:41:19 am Jordi wrote:
> > I might have found the problem.
> >
> > server/rendering/OgreAdaptor.cc line 180 :
> >
> >   this->sceneMgr->setFog(Ogre::FOG_LINEAR, *this->backgroundColor, 0,
> 1000,
> > 1000);
> >
> > According to the Ogre documentation :
> >
> > void Ogre::SceneManager::setFog      (       FogMode        mode =
> > FOG_NONE, const ColourValue &      colour = ColourValue::White,
> >         Real      expDensity = 0.001,
> >         Real      linearStart = 0.0,
> >         Real      linearEnd = 1.0
> >     )
> >
> > Parameters:
> >         mode     Set up the mode of fog as described in the FogMode
> enum,
> > or set to FOG_NONE to turn off.
> >         colour     The colour of the fog. Either set this to the same as
> > your viewport background colour, or to blend in with a skydome or
> skybox.
> >         expDensity     The density of the fog in FOG_EXP or FOG_EXP2
> mode,
> > as a value between 0 and 1. The default is 0.001.
> >         linearStart     Distance in world units at which linear fog
> starts
> > to encroach. Only applicable if mode is FOG_LINEAR.
> >         linearEnd     Distance in world units at which linear fog
> becomes
> > completely opaque. Only applicable if mode is FOG_LINEAR.
> >
> >
> >
> > So the last but one parameter is wrong, instead of 1000 should be
> > 0.something.
> > BUT we are using FOG_LINEAR and hence that parameter should not
> influence.
> > In fact, playing with it, it really don't seems to change anything, even
> as
> > high as 100.
> > But setting it to 1000 will give the black screen.
> >
> > Tomorrow I will send a bug report to Ogre and send a proper patch to
> Gazebo
> > (I made some code refactoring while reading the code) if someone can
> > reproduce my same result.
> >
> > I'll appreciate if someone can just comment that line, recompile and see
> if
> > the black screen problem went away.
> >
> > Thank you very much for all the information you gave.
>
>
>
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-- 
Jordi Polo Carres
Natural language processing laboratory
NAIST
http://www.bahasara.org