SSDP

The [Simple/Slick/Stupid/Smart/../Slimy/Sexy] Sky Dome Projector (SSDP) (have not decided yet which adjective fits best, there is just so many) is a library for modeling irradiance taking into accound the local topography. It implements a hexagonal mesh for the sky and the Perez all weather sky model. For the topography it works with a point cloud of x,y,z coordinates or a regular grid. It can compute the horizon as seen from a specific location in the topography and can project the modelled sky dome onto a surface with a specified tilt and orientation. The surface location and orientation may be adapted to the topography (e.g. specify height above the surface and adapt the orientation to the surface normal).