This is the command dayfact that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
dayfact - compute illuminance and daylight factor on workplane
dayfact [ falsecolor options ]
Dayfact is an interactive script for computing workplane illuminance, and daylight factors
and potential daylight savings using rtrace(1). The script falsecolor(1) is then used to
draw contour lines on the resulting Radiance picture.
Use dayfact online using onworks.net services