Re: [Speed-dreams-devel] Review New Lighting

[<ba...@ne...>]

Hi Xavier,

i agree it didn't make sense porting anything to PLIB+SD 2.1 when we
will using OSG soon.

Vertex shadow via vertex colors aren't a good solution because in  
realtime 3D you
do not have enough shadows and so it look great.

May these two links sounds interesting making shadows depending on
daytime and weather:
http://stackoverflow.com/questions/2818351/per-component-alpha-channels-with-opengl
http://www.opengl.org/discussion_boards/showthread.php/123815-Modulate-blend-with-alpha-fade

Cheers
Eckhard.


May this would help making

Zitat von xavier bertaux <ber...@ya...>:

> Hi Eckhard,
>
>> the imprved lighting is great!!! I love it. Good work, go on.
>
> Thank's
>
>> My experience is that it took a half second on race start after 
>> lightning is applies to scene.
>
> Yes, I saw this too, I don't know why, maybe the difference time  
> between the init scene and the start race. I search.
>
>> I missing lens flare effects, halos and sunset when i look at the 
>> direction from where the
>> lightsource shines.
>
> The lens flare is desactivate with sky dome since the start.
> The halo is visible after a definite angle.
> Sunset ? strange, at home sunset and sunrise work fine.
>
>> How does track and car shadows depending on the lightning of the scene?
>
> The hardest part.
> Actually the Shadow is do by shadow map (it's why too, the Scene is  
> not fully darkness in night, because shadowmap modulate texture,  
> with scene in AC file, not in ACC, the Scene is fully darkness).
>
> One solution would to make more shadowmap and change with sun  
> ascension, but these solution will generate a lot of file and take  
> many memory in run.
>
> Other solution generate vertex in track textured with shadow and  
> enlarge or reduce following the Sun ascension.
>
> For me the vertex shadow ( the technique, not the solution above) is  
> good for cars and building but not for trees, so for me the better  
> solution would be generate vertex on track with texture shadow and  
> vertex shadow program for building and cars.
>
> but I would not do that on PLIB, otherwise I would never start on  
> OSG.My idea is to add all the new features 3D scene (Shadow,  Stereo  
> display,  LOD Scene, etc ...) on OSG, otherwise, as I already  
> said, we will added optionsall time to the engine PLIB and never  
> migrate.
>
> I think that my work on Sky is good now for PLIB and SD 2.1 version  
> (just something on Moon position and maybe moved environnement  
> values in struct (cloud type, rain, ascension Sun and Moon,  
> declination Sun and Moon, humidity, temperature, time and day - time  
> for championship by exemple, qualification and race start at the  
> same day but not at the same time and Day for to have the season on  
> the 3D scene (spring, summer, fall, winter) and and while I work on  
> migration GSO, SD can continue to be improved (the rain for all  
> robots, robots improve, add new carsets, etc ...)
>
> Cheers
> Xavier