Error when saving TriMesh as .obj

[Arne Keller]

When trying to save a TriMesh as an .obj file, I get this error:

thread 'main' panicked at /home/arne/src/meshx/src/io/obj.rs:528:10:
called `Result::unwrap()` on an `Err` value: DoesNotExist("object")
stack backtrace:
   0: rust_begin_unwind
             at /rustc/c469197b19d53a6c45378568f73c00986b20a5a5/library/std/src/panicking.rs:617:5
   1: core::panicking::panic_fmt
             at /rustc/c469197b19d53a6c45378568f73c00986b20a5a5/library/core/src/panicking.rs:67:14
   2: core::result::unwrap_failed
             at /rustc/c469197b19d53a6c45378568f73c00986b20a5a5/library/core/src/result.rs:1652:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/c469197b19d53a6c45378568f73c00986b20a5a5/library/core/src/result.rs:1077:23
   4: meshx::io::obj::convert_polymesh_to_obj_format
             at ./src/io/obj.rs:526:24
   5: meshx::io::save_polymesh_impl
             at ./src/io.rs:231:23
   6: meshx::io::save_trimesh
             at ./src/io.rs:280:5
   7: tutorial::main
             at ./examples/tutorial.rs:86:9
   8: core::ops::function::FnOnce::call_once
             at /rustc/c469197b19d53a6c45378568f73c00986b20a5a5/library/core/src/ops/function.rs:250:5

[Egor Larionov]

Hello @FliegendeWurst, thank you for submitting this issue! I believe I found the cause of this bug, and fixed it in 0f2a1df

Please let me know if you are still running into this issue and we can reopen it.

[Arne Keller]

Thanks for the fix @elrnv! I'm no longer running into the issue.

Since it was still possible to save as .vtk, I spent quite some time investigating how to convert from that format to .obj. It is rather difficult to find a good solution... I think you would attract quite a few users if you build an easy-to-use conversion tool based on your library ;)