work on layout editor
creation of graph Gc
commenting pring in buildGc
adding scattering layouts
fixing problem in Polygon __init__
adding numseg in layout
adding setvnodes in Polygon
new feature in geomutil Polygon
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