[Radiance-general] triangle lit surface......
Martin Moeck
MMoeck at engr.psu.edu
Wed Nov 17 22:35:09 CET 2004
See the Radiance book on page 510-512. See also p. 577, sentences 2-3.
Martin Moeck
-----Original Message-----
From: Woogie [mailto:wxo110 at psu.edu]
Sent: Wed 11/17/2004 4:17 PM
To: radiance-general at radiance-online.org
Cc:
Subject: [Radiance-general] triangle lit surface......
Hi,
I have in trouble with triangle lit surface by light material.
Greg pointed out before that putting light material on the surface is not usual
scene.
However, it works fine to me as long as the surface is rectangle or trapezoid.
When the surface is triangle, some light seems lost.
My scene rad file is like below.
void light triangle
0
0
3 5 5 5
triangle polygon triangle.1
0
0
9 -25 -50 50
-1 35 95
10 0 75
I expected 135 lux(illuminance) at the point (0,0,0) with aiming point(0,0,1).
What I got in this scene by running Radiance is 83 lux.
I assumed that the surface with light material distribute light like lambertian
surface.
In the fallowing website, It can be found out that rectangle surface with light
material works fine.
http://www.personal.psu.edu/users/w/x/wxo110/radiance.htm
Any comment will be very helpful to me.
Thanks!
>From Woogie.
_______________________________________________
Radiance-general mailing list
Radiance-general at radiance-online.org
http://www.radiance-online.org/mailman/listinfo/radiance-general
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://radiance-online.org/pipermail/radiance-general/attachments/20041117/57ba15e5/attachment.html
More information about the Radiance-general
mailing list