Module obj 

A minimal CityJSON-to-OBJ writer.

Ported from cjseq2 0.1.1’s conv::obj, which the typed rewrite dropped. The behaviour is unchanged, including its crude notion of a face: every ring becomes an f line, interior rings included, and nothing is triangulated.

The one thing that did change is how the rings are found. The old version recursed through an untyped Boundaries tree until it hit a leaf; here each geometry’s ring iterator comes from its variant, so the depth is never guessed at.

Functions

to_obj

Writes a CityJSON object as OBJ to writer.

to_obj_string

Converts a CityJSON object to OBJ format and returns it as a string.