This model considers third party shadowing due to horizon vertical exaggeration and/or obstruction for direct radiation based on VDI 6007 part 3. It calculates a limit elevation angle for the sun.
The figures show how the parameter should be set. For every considered cornerpoint of the skyline there should be an azimut, a heightdifference between the cornerpoint and the middle of the window and a distance between the window centre and the cornerpoint. The Boolean gap indicates if there is a gap in the skyline and should be set for every cornerpointpair. In the example above it should be set {false,false,true,false,false} for the pairs {1+2,2+3,3+4,4+5,5+6}.
References
VDI. German Association of Engineers Guideline VDI 6007-3 June 2015. Calculation of transient thermal response of rooms and buildings - Modelling of solar radiation.