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Ran 19 Mar 2020 04:11PM UTC

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Committed 19 Mar 2020 04:00PM UTC coverage: 81.042% (+0.07%) from 80.974%

Job # PYTHON_VERSION=3.6

Build Type

Pull #724

travis-ci

Committed by

web-flow

Commit Message

Support differing list-lengths in ASCII-PLYs

PLY allows defining list-properties, where every instance of the
property can have a different length. This can for instance be useful
when storing submeshes in the metadata of a PLY-file.

trimesh only supported PLY-files with list-properties, if every
instance of the list had the same length. Properties with lists of
differing lengths let the parser crash at the `vstack`-call in
`ply.ply_ascii`, as arrays of differing size cannot be stacked.

The implementation at hand adds support for lists of differing length.

The drawback of the new implementation is an increased load-time for
elements containing lists. I tried to mitigate this effect by checking
whether an element has no list or just one where every instance has the
same length and using the numpy-based algorithm to get the data in this
case, while iterating all rows, if there's more than one list or one
list with instances of differing lengths.

Pull Request Pull Request #724: Support differing list-lengths in ASCII-PLYs

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