landon export fails: unknown field `vertex_positions`

[kevzettler]

Hi @chinedufn the export is failing for me with an error about vertex_positions

Versions

kevs-mbp:crashgiants kevzettler$ landon -V
landon 0.7.1
kevs-mbp:crashgiants kevzettler$ rustc -V
rustc 1.44.0 (49cae5576 2020-06-01)
kevs-mbp:crashgiants kevzettler$ blender --version
Blender 2.80 (sub 75)
    build date: 2019-07-29
    build time: 18:27:51
    build commit date: 2019-07-29
    build commit time: 14:47
    build hash: f6cb5f54494e
    build platform: Darwin
    build type: Release
    build c flags:  -Wall -Werror=implicit-function-declaration -Werror=return-type -Wno-tautological-compare -Wno-unknown-pragmas -Wno-char-subscripts -Wstrict-prototypes -Wmissing-prototypes -Wunused-parameter  -mmacosx-version-min=10.11 -Xclang -fopenmp -I'/Users/azo/Code/blender/blender_build/blender/../lib/darwin/openmp/include' -std=gnu11   -msse -pipe -funsigned-char -msse2
    build c++ flags:  -Wall -Wno-tautological-compare -Wno-unknown-pragmas -Wno-char-subscripts -Wno-overloaded-virtual -Wno-sign-compare -Wno-invalid-offsetof  -mmacosx-version-min=10.11 -ftemplate-depth=1024 -stdlib=libc++ -Xclang -fopenmp -I'/Users/azo/Code/blender/blender_build/blender/../lib/darwin/openmp/include' -std=c++11   -msse -pipe -funsigned-char -msse2
    build link flags: -fexceptions -framework CoreServices -framework Foundation -framework IOKit -framework AppKit -framework Cocoa -framework Carbon -framework AudioUnit -framework AudioToolbox -framework CoreAudio -framework Metal -framework QuartzCore -framework ForceFeedback -liconv -Xlinker -unexported_symbols_list -Xlinker '/Users/azo/Code/blender/blender_build/blender/source/creator/osx_locals.map' -stdlib=libc++
    build system: CMake

Error output

$ landon export -f ./assets/WiP-punch.blend
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error("unknown field `vertex_positions`, expected one of `armature_name`, `bounding_box`, `multi_indexed_vertex_attributes`, `materials`, `custom_properties`", line: 1, column: 19)', /Users/kevzettler/.cargo/registry/src/github.com-1ecc6299db9ec823/blender-mesh-0.7.1/src/export.rs:158:38
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
kevs-mbp:crashgiants kevzettler$ RUST_BACKTRACE=1 landon export -f ./assets/WiP-punch.blend
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error("unknown field `vertex_positions`, expected one of `armature_name`, `bounding_box`, `multi_indexed_vertex_attributes`, `materials`, `custom_properties`", line: 1, column: 19)', /Users/kevzettler/.cargo/registry/src/github.com-1ecc6299db9ec823/blender-mesh-0.7.1/src/export.rs:158:38
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::rust_panic_with_hook
   5: rust_begin_unwind
   6: core::panicking::panic_fmt
   7: core::option::expect_none_failed
   8: blender_mesh::export::parse_meshes_from_blender_stdout
   9: <landon::subcommands::export::ExportCmd as landon::Subcommand>::run
  10: landon::main
  11: std::rt::lang_start::{{closure}}
  12: main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[kevzettler]

The error points to this line:

https://github.com/chinedufn/landon/blob/master/blender-mesh/src/export.rs#L158

[chinedufn]

Ah - looks like you're running an older version of the addons. Sorry that it isn't yet clear that that's the case.

landon install --armature-to-json --mesh-to-json

[kevzettler]

okay with those installed i'm now seeing

kevs-mbp:crashgiants kevzettler$ landon export -f ./assets/WiP-punch.blend
Error: Error while exporting data from blender: Traceback (most recent call last):
  File "/Users/kevzettler/Library/Application Support/Blender/2.80/scripts/addons/blender-mesh-to-json.py", line 132, in execute
    boneIndex = allBoneNames.index(boneName)
ValueError: 'Group' is not in list

location: /Applications/Blender.app/Contents/Resources/2.80/scripts/modules/bpy/ops.py:201

location: /Applications/Blender.app/Contents/Resources/2.80/scripts/modules/bpy/ops.py:201
Traceback (most recent call last):
  File "<string>", line 13, in <module>
  File "/Applications/Blender.app/Contents/Resources/2.80/scripts/modules/bpy/ops.py", line 201, in __call__
    ret = op_call(self.idname_py(), None, kw)
RuntimeError: Error: Traceback (most recent call last):
  File "/Users/kevzettler/Library/Application Support/Blender/2.80/scripts/addons/blender-mesh-to-json.py", line 132, in execute
    boneIndex = allBoneNames.index(boneName)
ValueError: 'Group' is not in list

location: /Applications/Blender.app/Contents/Resources/2.80/scripts/modules/bpy/ops.py:201

location: <unknown location>:-1

location: <unknown location>:-1

[chinedufn]

Mind taking a look at your mesh’s vertex groups and seeing if there is one called “Group”

Seems like if you deleted that you’ll be in good shape

If you click on your mesh in object mode it’s the green triangle panel on the right

[chinedufn]

Or is that vertex group intentionally there for you?

[chinedufn]

Either way I’m currently looking into this error and once I am reproduce I’ll add a test case for this - thanks for reporting

[kevzettler]

I have a bunch of meshes, and not seeing a "Group" vertex group for any of them.

[chinedufn]

boom I can reproduce. Gimme like 30 mins to add a test and push a fix

[chinedufn]

Published a fix as landon 0.7.2

https://github.com/chinedufn/landon/commit/0679337b84899285bcd1d554259a047a03dc9c5b

cargo install -f landon --version 0.7.2

[chinedufn]

Closing - just lmk if this is still broken