Sven Littkowski nous apporta ses lumieres en ce 16/11/2006 08:43:
> Alain,

> can you give me an example code? I just start to work with media...   :-(

> Thanks,

> Sven


>> More than one way.
>> Acurate but slow: fill the scene with scathering media.
>> Somewhat faster: as above, but the media is contained around the beam by 
>> some container.
>> Both use a strong light_source to illuminate the media.
>> Faked but faster: the beam path is materialised by a long conical 
>> container filled with emissive media.
>> Here, the actual light is just for show as the media itself is luminous.
>> Using the last 2, you need to increase max_trace_level, particularly if 
>> you have multiple beams that may visualy cross each other.


>> -- 
>> Alain
>> -------------------------------------------------
>> If you are good, you will be assigned all the work. If you are really 
>> good, you will get out of it. 


Minimal samples for the suggestions.
1-
media{scattering{1 rgb 1}samples 100}//scene whide media using isotropic scattering
light_source{0, rgb 100//very bright so you can easily see the beam
	spot_light radius 2 falloff 3 point_at x rotate -32*y}
//A tight spot light shining to the right and away

2-
union{//link light and media cone so they can be oriented together
cone{0,0, 1000*x,53 pigment{rgbt 1}interior{media{scattering{1 rgb 1}samples 10}}}
light_source{0, rgb 100//very bright so you can easily see the beam
	spot_light radius 2 falloff 3 point_at x}
rotate -32*y}

3-
cone{0,0, 1000*x,53 pigment{rgbt 1}interior{media{emission 50}samples 10}rotate 
32*y}
//this won't shed any light, unless you are using radiosity.

-- 
Alain
-------------------------------------------------
No matter how good she looks, some other guy is sick and tired of putting up 
with her shit.
	Men's Room, Linda's Bar and Grill, Chapel Hill , NC

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