[Radiance-general] Generate a Radiance picture using rtrace instead of rpict under Windows

[Guglielmetti, Robert]

Hi Francois,

Yeah, Windows doesn’t always support some of the more elegant ways we can shuttle input and output around to unix programs.  Here’s a snippet of Ruby code from the OpenStudio Radiance daylight sim program, which uses rtcontrib as well. You can see that if running on Windows, the script does the vwrays call and stores it as a variable (vwrays_out) and then passes that in, later. If running on Mac or Linux, the second command takes the form of Akel’s from his tutorial.

puts "computing daylight coefficients for #{space_name}"
            view_def = ""
            dims = options.dims
           view_def ="-x #{dims} -y #{dims} -vf #{Dir.pwd}/numeric/#{space_name}.sns"
            if /mswin/.match(RUBY_PLATFORM) or /mingw/.match(RUBY_PLATFORM)
              vwrays_out = `vwrays -d #{view_def}`.strip
              exec_statement("vwrays -ff #{view_def} | rtcontrib #{rtrace_args = "#{opts_map}"} -V- -fo -ffc #{vwrays_out} -f tregenza.cal -bn 146 -b tbin -o #{binDir}/#{space_name}_treg%03d.hdr -m skyglow model_dc.oct")
            else
              exec_statement("vwrays -ff #{view_def} | rtcontrib #{rtrace_args} -n #{simCores} -V- -fo -ffc $(vwrays -d #{view_def}) -f tregenza.cal -bn 146 -b tbin -o #{binDir}/#{space_name}treg%03d.hdr -m skyglow model_dc.oct")

I hate to suggest another dependency to make this work, but that’s how we did it for our purposes. Maybe some savvy Windows users know a workaround that can be employed directly in the Windows shell. ?


-          Rob



From: François Cantin [mailto:FCantin at coarchitecture.com]
Sent: Monday, June 25, 2012 11:23 AM
To: radiance-general at radiance-online.org
Subject: [Radiance-general] Generate a Radiance picture using rtrace instead of rpict under Windows

Hi,

I’m working through Axel Jacobs' excellent 'rtcontrib' tutorial and I want to generate a Radiance picture using rtrace instead of rpict. For your information, I'm under Windows 7 with the latest Radiance binaries downloaded from the NREL Openstudio website:  http://openstudio.nrel.gov/getting-started-developer/getting-started-radiance

When I try this:
vwrays −ff −vf view1.vf −x 1024 −y 1024 | rtrace ‘vwrays −d −vf view1.vf −x 1024 −y 1024‘ −ffc scene.oct > view1.hdr

I obtain this error message:
rtrace: fatal - command line error at 'vwrays'

Then I use double quotes...
vwrays −ff −vf view1.vf −x 1024 −y 1024 | rtrace "vwrays −d −vf view1.vf −x 1024 −y 1024" −ffc scene.oct > view1.hdr

...and I obtain this error message:
rtrace: fatal - command line error at 'vwrays −d −vf view1.vf −x 1024 −y 1024'


Any advice on how to solve or work around this problem would be greatly appreciated !


Thanks in advance,


François Cantin

stagiaire en architecture, M Arch, MSc Arch

[cid:image001.jpg at 01CD52C6.73926A70]

1175, Lavigerie, bureau 400, Québec, Qc,  G1V 4P1

T (418) 653 8484 #224, F (418) 653-6189

E fcantin at coarchitecture.com<http://fcantin@coarchitecture.com>

http://www.coarchitecture.com


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