[Radiance-general] Re: trans dashboard widget

[Jack de Valpine]

Hi Andy,

OK, the inevitable... the question that you know had to come.... ;->

Is there any way to port this to Linux (and I suppose Windows)? Or 
perhaps port to something web based?

Best,

-Jack

-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction



Gregory J. Ward wrote:
> Hi Andy,
>
> This was more of a struggle than I expected.  I don't know what I did 
> with my old color wheel, so I tried to come up with an expression to 
> generate a new one based on the Wikipedia page on HSV conversions.  
> It's not quite what I was going for, but it's OK:
>
> pcomb -x 512 -y xres \
> -e 'xc:xres/2;yc:yres/2;xr=(x-xc)/xc;yr=(y-yc)/yc' \
> -e 'rv=.7349*xr-.3495*yr;gv=-.2651*xr+.2279*yr;bv=-.2651*xr-.9268*yr' \
> -e 'max(a,b):if(a-b,a,b);Y=1-max(rv,max(gv,bv))' \
> -e 'in=1-xr*xr-yr*yr' \
> -e 'ro=if(in,Y+rv,.5);go=if(in,Y+gv,.5);bo=if(in,Y+bv,.5)' \
> | ra_tiff - color_wheel.tif
>
> When the user chooses a color, you'll have to map back to linear RGB 
> (undoing the 2.2 gamma) and normalize.
>
> Hope it works!
>
> -Greg
>
> P.S.  I didn't notice the trick of going to "plastic" when 
> transmission is zero -- very nice!
>
>> From: Andy McNeil <amcneil at lbl.gov>
>> Date: April 30, 2010 9:22:17 AM PDT
>>
>> Hi Greg,
>>
>> You're right, the ability to specify color would be nice.  Yes, 
>> please send your image.
>> Did you notice what happens when Td & Ts are set to zero?
>>
>> Thanks,
>> Andy
>
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