Function Utility_GenerateObjFile 

pub unsafe fn Utility_GenerateObjFile(
    road_network: *const RoadNetwork,
    dirpath: &String,
    fileroot: &String,
    features: &Features,
) -> Result<(), Exception>

Generates an .obj and .mtl files named fileroot under the dirpath directory.

Safety

The caller must ensure the road_network pointer is valid during the method execution.