Hello everyone,
I am trying to run 'rtcontrib' with the latest Radiance version to
compute the illuminance contributions according to a Tregenza sky.
The code that I am using looks like this:
rtcontrib -w- -h- -I+ -ad 1000 -as 500 -ab 1 -V -b tbin -o
results/sky/%s$i.data -m skyglow -b 0 -o results/ground/%s$i.data -m
groundglow -f tregenza.cal model.oct < grid/grid.grd
The code works fine when the grid used points up (+z). However, I would
like to find the illuminance on a wall grid, thus the grid points must
point in either +y, -y, +x or -x. When I run 'rtcontrib' in this case
the number of columns varies between 438 and 435 (since rtcontrib
outputs r g b values). Thus, 'rtcontrib' seems to be skipping a patch
every now and then. I have tried also to increasing the settings but the
same problem occured.
Is it possible to resolve this problem somehow so that the number of
columns is consistent all the time (i.e. 438 including the ground)? If
yes, how?
Thank you,
Pavlina Akritas
···
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Hi Pavlina,
You should set -bn 146 on your rtcontrib line, so that even if nothing comes back in certain bins, the number of output values is held constant.
Also note that the -as parameter gets overridden to 0 because it is incompatible with the MC technique used by rtcontrib. Indirect calculation settings in general should be different from what you would use for rtrace. Large values for -ad do not necessarily help you that much in rtcontrib, but I haven't explored the parameter space enough myself to really offer sound advice.
Best,
-Greg
···
From: "Pavlina Akritas" <[email protected]>
Date: May 22, 2008 2:26:03 AM PDT
Hello everyone,
I am trying to run 'rtcontrib' with the latest Radiance version to
compute the illuminance contributions according to a Tregenza sky.
The code that I am using looks like this:
rtcontrib -w- -h- -I+ -ad 1000 -as 500 -ab 1 -V -b tbin -o
results/sky/%s$i.data -m skyglow -b 0 -o results/ground/%s$i.data -m
groundglow -f tregenza.cal model.oct < grid/grid.grd
The code works fine when the grid used points up (+z). However, I would
like to find the illuminance on a wall grid, thus the grid points must
point in either +y, -y, +x or -x. When I run 'rtcontrib' in this case
the number of columns varies between 438 and 435 (since rtcontrib
outputs r g b values). Thus, 'rtcontrib' seems to be skipping a patch
every now and then. I have tried also to increasing the settings but the
same problem occured.
Is it possible to resolve this problem somehow so that the number of
columns is consistent all the time (i.e. 438 including the ground)? If
yes, how?
Thank you,
Pavlina Akritas