[Radiance-general] if statement with vwrays

[Tarik Rahman]

Hi there
I'm trying to get the hang of the syntax using an if statement with the
following command


./vwrays.exe -fd someRender.pic | rtrace -fda `vwrays -d zoomsomeRender.pic`
-oodLpnsm testroom.oct > rays.txt

but only output the rays that hit the surface called greenbox.
Is it something like

./vwrays.exe -fd someRender.pic | rtrace -fda `vwrays -d zoomsomeRender.pic`
-oodLpnsm `if(s='greenbox')` testroom.oct > rays.txt

Thanks for any help

Tarik
--
Tarik Rahman
PhD student, Institute of Perception, Action and Behaviour
School of Informatics
University of Edinburgh