[Bf-committers] Operator Import/Export (proposed changes)

François T. francoistarlier at gmail.com
Tue Aug 31 19:26:24 CEST 2010

except Collada for instance ? or do you consider porting the code to py ? I
actually never understood why it was done in C instead of py though ?

2010/8/31 Campbell Barton <ideasman42 at gmail.com>

> There are some changes I planned for a while and should do sooner then
> later since our own scripts are meant as examples for new devs to
> follow.
> In brief the proposal is to have import/export be setup more like addons.
> - move from "io" directory to "op"
> - make each format into a package so "/op/io_obj/__init__.py, load.py,
> save.py"
>  (I'm not fussed on submodule names, we just cant use import.py since
> its a py keyword)
> - only define operators in __init__.py, delay importing read/write
> modules until the operators run
>  (so blender loads faster!)
> The main disadvantage I see with this is we don't have all files in a
> simple flat directory anymore, but faster load times are a big
> incentive for me.
> This is fairly straightforward, but there are some other things to
> consider while on the topic.
> The changes suggested above basically make these match how our addons
> work, we could just have all importers and exporters be addons, some
> enabled by default.
> For the user it wont matter much but this means we can have addons
> show up in the menu by default without them being moved into another
> SVN repository.
> I'd also like to use mix-in classes for Importers/Exporters, this
> means we can have generic invoke functions, not have to define
> filename property on each operator, and we could generalize options
> for batch import/export too.
> Simple patch which adds bpy.types.Operator.Export
>  http://www.pasteall.org/15353/diff
> ...this would be opt in since some scripts might want their own
> invoke, but for now we have duplicate invoke() functions for most i/o.
> --
> - Campbell
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François Tarlier

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