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Summary:
OBJ files without vertices or faces should be allowed:
- an OBJ with only vertices can represent a point cloud
- an OBJ without any vertex or face is just empty
- an OBJ with faces referencing inexistent vertices has invalid data

Reviewed By: gkioxari

Differential Revision: D20392526

fbshipit-source-id: e72c846ff1e5787fb11d527af3fefa261f9eb0ee

Summary: use assertClose in some tests, which enforces shape equality. Fixes some small problems, including graph_conv on an empty graph.

Reviewed By: nikhilaravi

Differential Revision: D20556912

fbshipit-source-id: 60a61eafe3c03ce0f6c9c1a842685708fb10ac5b

Summary: Add more complex mesh I/O benchmarks: simple yet non-trivial procedural donut mesh

Reviewed By: nikhilaravi

Differential Revision: D20390726

fbshipit-source-id: b28b7e3a7f1720823c6bd24faabf688bb0127b7d

Summary: Rename mesh I/O benchmarking methods: always (re-)create file-like object and directly return a lambda

Reviewed By: nikhilaravi

Differential Revision: D20390723

fbshipit-source-id: b45236360869cccdf3d5458a0aafb3ebe269babe

Summary:
Rename mesh I/O benchmarks and associated methods:
- add `simple` qualifier (benchmark on more realistic mesh data to be added later)
- align naming between OBJ and PLY
- prefix with `bm_` to make the benchmarking purpose clear(er)

Reviewed By: nikhilaravi

Differential Revision: D20390764

fbshipit-source-id: 7714520abfcfe1125067f3c52f7ce19bca359574

Summary: The shebang line `#!<path to interpreter>` is only required for Python scripts, so remove it on source files for class or function definitions. Additionally explicitly mark as executable the actual Python scripts in the codebase.

Reviewed By: nikhilaravi

Differential Revision: D20095778

fbshipit-source-id: d312599fba485e978a243292f88a180d71e1b55a

Summary:
Create the textures and the Meshes object from OBJ files in a single call.

There is functionality in OBJ files (like normals) which is ignored by this function.

Reviewed By: gkioxari

Differential Revision: D19691699

fbshipit-source-id: e26442ed80ff231b65b17d6c54c9d41e22b4e4a3

Summary: Add flag for loading textures

Reviewed By: nikhilaravi

Differential Revision: D19664437

fbshipit-source-id: 3cc4e6179df9b7e24efff9e7da3b164253f1d775

fbshipit-source-id: ad58e416e3ceeca85fae0583308968d04e78fe0d