pub fn serialize_obj(
scene: &Scene3D,
mtl_basename: Option<&str>,
) -> Result<Vec<u8>>Expand description
Serialise a Scene3D to OBJ format.
mtl_basename, when supplied, emits an mtllib <basename>.mtl
directive at the top so a sibling MTL file (written separately via
crate::mtl::serialize_mtl) is referenced.