3D Buildings

Pro Feature: The buildings import pipeline in this recipe requires a commercial license. See https://github.com/milos-agathon/forge3d#license

3D buildings preview

This example uses the real CityJSON tile assets/geojson/10-270-592.city.json. It is parsed into triangle meshes and previewed directly from those triangles instead of routing them through the terrain vector-overlay path.

Ingredients

forge3d.add_buildings_cityjson()
Building.positions
Building.indices

Sketch

import forge3d as f3d

layer = f3d.add_buildings_cityjson("assets/geojson/10-270-592.city.json")
for building in layer.buildings:
    vertices = building.positions.reshape(-1, 3)
    triangles = building.indices.reshape(-1, 3)
    print(building.id, vertices.shape[0], triangles.shape[0], building.height)

Once you have triangle positions and indices, render them through a mesh path or your own preview renderer. Do not send CityJSON building meshes through add_vector_overlay; that path is for draped overlays, not volumetric buildings.