[Radiance-general] perforated lamellas

[Bleicher, Thomas]

 Friedemann,
 
I assume you only try to approximate the effect on the shadowing
of the room, then, not modelling the real reflectance of the material.
 
You could start with your base material (aluminium - see the example
materials in the distribution) and add a mixfunc with void as second
modifier. Thus the areas defined in the function file should simply
be transparent like a hole in the material. 
 
There was a function file that created a dot pattern by Georg
Mischler; I just can't remember the name now. You have to specify
the right dimmensions of the dots for your 85/15 ratio. I think
you could apply a scale to it so that it created oval dots instead of
circles (but that might have been a different function file). 
 
hth,
Thomas
  


________________________________

	From: radiance-general-bounces at radiance-online.org [mailto:radiance-general-bounces at radiance-online.org] On Behalf Of Friedemann Kik
	Sent: 03 November 2006 08:42
	To: Radiance general discussion
	Subject: AW: [Radiance-general] perforated lamellas
	
	
	Hi all,
	I agree, but my simulation should give results for LEED minimal requirements. There it is only one defined sky (midday, equinox, clear sky) and a minimum average illuminance in the room behind the facade (+ turnable but not moveable lamellas) is required.
	The lamellas I've to simulate are not the perforated mini blinds, but get  a dimensions of 0.5 meter width and a length of about 3 meters.
	The surface is brushes aluminum (adapted for redirect the daylight into the room). 
	With this starting position, I need a material definition which reflect the daylight (direct and diffuse)  at  85% of lamella area and, on account of the 15% of gaps in the lamellas, a light transmission of 15%.
	Does anybody have an idea?
	 
	Thanks
	Friedemann
	 

		-----Ursprüngliche Nachricht-----
		Von: radiance-general-bounces at radiance-online.org [mailto:radiance-general-bounces at radiance-online.org] Im Auftrag von Mark de la Fuente
		Gesendet: Dienstag, 31. Oktober 2006 15:45
		An: radiance-general at radiance-online.org
		Betreff: Re: [Radiance-general] perforated lamellas
		
		
		Wouldn't the transmission and distribution vary depending on the angle of the lamellas?  These are like perforated metal mini blinds right?
		 
		Mark


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