$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.

$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.