Hi everyone,

I am following the radiance_cookbook.pdf to learn about radiance. But for the exercise at p12: there is a exercise to use `xform`

command to a array of fittings:

$ cat lights.rad

!xform -t 1 1 2.95 -a 3 -t 1 0 0 -a 4 -t 0 1 0 erco.rad

I know that the` -a 3 -t 1 0 0 -a 4 -t 0 1 0`

is used to place fitting. But I am confused about why use `-t 1 1 2.95`

to translate the scene. Dose this is used to define the original coordinate of the fitting array, like z= 2.95 is the height of working plane, x=1 and y=1 is the original position of the fitting array?

Cheers,

Hao