[Radiance-general] luminaire modelling and 'rshow' questions

[Christian Fusenig]

Hello @all,

first of all thank you Greg for helping me with this color problem, i 
found a mistake in my calculations, when i use rgb_xyz.cal i get the 
same results now for D65 white point.

I want to model a luminaire from my measured data and  as long as it is 
symmetric around the z axis it all goes well. But as soon as i want to 
write an .ies-file for a rectangular shaped luminaire with non 
symmetrical distribution the file doesnt' work.
This is my file:
IESNA95
[TEST]
[MANUFAC] Arri Studio Cool 2
[DATE] 03/27/06
[LAMP] Osram Studioline, StudioLine55W/31VAR 2G11 FS1
TILT=NONE

1 5000 1 12[vert.] 27[horiz.] 1 1 .2[width] 0.6[Lenght] 0[height] 1 1 55

0 5 10 15 20 25 30 35 40 45 50 55 [vert. degrees]

0 2.5 5 7.5 10 12.5 15 17.5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 
[horiz. degrees]

1623 1582 1618 1693 1815 1979 2169 2185 2166 2111 2273 2511 [vert. values]

1623 1628 1634 1641 1658 1677 1705 1744 1786 1885 2064 2254 [hor. values]
 2546 2905 3247 3864 4579 6024 7642 9496 8984 30789 6024 7642
 9496 8984 30789

The [...] are only comments, i don't have them in the file normally. 
When i convert the file this returns:
$ ies2rad -t white -o light/sc2  ies/sc2.ies
dosource: bad distribution data
ies/sc2.ies: bad luminaire data

I can't really find a file explanation or help on the .ies file format. 
Can anyone help me on this one?
----------------------
Second question:

I tried to get 'rshow' to work, but it doesn't really do. I downloaded 
from 'http://www.pab-opto.de/progs/rshow/' the Linux version but i use 
Radiance under 'cygwin', a Unix emulation for WinXP, as a Unix version i 
guess. Where do i have to set the environment variable, when i use 
Radiance in c:\cygwin\opt\ray\bin ? I'm not used to do these things, so 
i am a little bit confused where to install rshow. Can someone guide me?

Thanks,

Christian


-- 
Christian Fusenig
Diplomand, Medientechnik
Undergraduate, Media Technology
Hamburg University Of Applied Sciences
http://www.mt.haw-hamburg.de

address: Beim Schlump 27/07
              20144 Hamburg

email:    christian_fusenig at gmx.de

mobile:  ++49 179 5975845