$setradseparate

$setradseparate is a function to define the radiation source's position. Usually raytracing is combined with 2D-DDCC. However, it still can be ran independently with reading in the gmsh's file format. If gmsh file format is used, you will need to setup the position of radiation source. The program will set the region to have a equal radiative recombination rate at 1.0e25 1/cm^3/s. This value does not have any meaning since all locations have the same rate.

$setradseparate
N_radiation_regions
x_l x_R y_bottom y_top R_type

R_type only support 0, which means equal distribution within this square box.