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Jeremy Reizenstein authored
Summary: Modify test_chamfer for more robustness. Avoid empty pointclouds, including where point_reduction is mean, for which we currently return nan (*), and so that we aren't looking at an empty gradient. Make sure we aren't using padding as points in the homogenous cases in the tests, which will lead to a tie between closest points and therefore a potential instability in the gradient - see https://github.com/pytorch/pytorch/issues/35699. (*) This doesn't attempt to fix the nan. Reviewed By: nikhilaravi, gkioxari Differential Revision: D21157322 fbshipit-source-id: a609e84e25a24379c8928ff645d587552526e4af
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