modif in DF impulse response
modif in setvnodes
add test-diff
implement diffraction in buildGi
diffarction in run5
adding scattering.ini in proper directory
fix in buildGi
improve showG for visualization of Gi
adding diffraction points in Gt interaction list
3D diffracted ray constructed
problem in layout.cycleinline
coding outdoor cycle
bug in layout l 4769 wrong dca
2D diffraction improvement