$fetfilename

The fetfilename is the output from the 2D-DDCC program with x,y and radiative distribution is obtained. The definition can be found in *.fet. It also needs to goes with the $fetfilename.
When the $fetfilename is called to used as the mesh file, it will read in the radiation profile from the 13th column of *.fet files. The program will decide the radiation source's position according to the radiative recombination distribution.

$fetfilename
filename 

For examples:

$fetfilename
Project_result.fet

The $fetfilename setting in GUI interface is here
After Save and run ray tracing, we can press Input Editor, then press the Load and display an optional input file button below.
Choose a file named something like filename-ray.inp, and then we can view it here.

$fetfilename, $trifilename