Initialize unit scope variables in the TreeCol unit, which are typically the runtime parameters. This routine must be called once by Driver_initFlash.F90. Calling multiple times will not cause any harm but is unnecessary. TreeCol unit will implement algorithm for estimating column densities developed by Clark et al. (2012, MNRAS, 420, 745).
useTreeCol BOOLEAN true Controls turning on/off the TreeCol unit
Each implementation of TreeCol has its own runtime parameters. Be sure to check the documentation or Config files to see them.