Sharing a Grasshopper script used in the recently published article, District-scale life cycle costing of climate-neutral retrofits, based on automatic envelope detection workflows and LOD3 3D city model
The script approximates 3D roof geometries using 2D building footprints plus LiDAR data used to extract eaves-to-peak roof heights, as well as a tool within ArcGIS to classify roof types (gable, hip, or flat).
The script is available at: https://github.com/asuptor/AutoRoofGeometry/