[Radiance-general] Antimatter

[Jack de Valpine]

Hi Rob,

Looks like I missed the point of the question. I see what you mean about 
the shadow.....

-Jack

Jack de Valpine wrote:
> Hi Rob,
>
> If you do the following it should work with a material at the cut:
>
> void antimatter cutter
> 2 sketchup_default_material sketchup_default_material
> 0
> 0
>
> -Jack
>
> -- 
> # Jack de Valpine
> # president
> #
> # visarc incorporated
> # http://www.visarc.com
> #
> # channeling technology for superior design and construction
>
> Fitzsimmons, Rob wrote:
>>
>> As a test, I did this in sketchup, and got curious results...
>> The light goes through, but only on the edge. All the grey boxes are 
>> antimatter, cutting through the wall.
>>
>> http://rastermon.com/images/antimatter.jpg
>> http://rastermon.com/images/antisketchup.gif
>>
>> my materials:
>> ## material conversion from Sketchup rgb color
>> void plastic sketchup_default_material
>> 0
>> 0
>> 5 0.1400 0.3400 0.3400 0.000 0.000
>>
>> void antimatter cutter
>> 2 void sketchup_default_material
>> 0
>> 0
>>
>>
>> Rob Fitz
>>
>>
>> -----Original Message-----
>> From: radiance-general-bounces at radiance-online.org on behalf of 
>> Giovanni Betti
>> Sent: Fri 10/30/2009 9:40 AM
>> To: Radiance general discussion
>> Subject: [Radiance-general] Antimatter
>>
>>
>> Dear All,
>>
>> It has been a real pleasure to have the chance to be at the radiance
>> workshop in Cambridge and to meet all the great guys there and to listen
>> to so many inspiring presentations (btw, really looking forward to see
>> them on line!)
>>
>> Now back to the office and again fighting with day to day issues. I am
>> trying to model a series of openings in a screen using antimatter and I
>> am getting really confused.
>> The screen is modelled as a single surface intersected by a number of
>> cubes. As in the antimatter description I read:
>> "The viewpoint must be outside all volumes concerned for a correct
>> rendering." I assume that means that the camera should not be inside one
>> of the cubes and that (I guess) the cube normals should point outward.
>> Done that, I am able to see through the cubes but I do not see the
>> pattern of light coming through the antimatter holes, I just have a big
>> solid shadow...
>>
>> Is that how it is supposed to behave? Does anybody have any clue about
>> what I am doing wrong?
>>
>> Thanks in advance,
>> Best,
>>
>> Giovanni
>>
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-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction

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