[Bf-python] Changing the scene in a script run from the command line

[Tom Haines]

Martin,

I had wondered about doing that - it is implied you can, but nowhere
is the how given! However, I just tried that and it didn't work - gave
a

TypeError: Converting py args to operator properties: : keyword "C" unrecognized

I also tried a lowercase c and context, but no luck either way. Thanks
though - I imagine you are close:-)

Cheers,
Tom



On 9 September 2010 22:48, Martin Poirier <theeth at yahoo.com> wrote:
> Hi,
>
> --- On Thu, 9/9/10, Tom Haines <thaines at gmail.com> wrote:
>
>> Hello all, and especially
>> ideasman_42, who it was suggested to me
>> might be the person most likely to be able to help me on
>> irc.
>> Unfortunately with me being in the UK and him in Australia
>> the time
>> zones are kinda problematic, hence using the mailing list.
>>
>> I am exporting a collada file from the command line with
>> Blender 2.5,
>> specifically by running a .py file using the -P option,
>> with -b to
>> avoid the gui appearing (Though it also fails if the -b
>> option is
>> omitted.). This works, but the collada exporter exports
>> entire scenes,
>> hence I want to set the scene before doing the export. My
>> best effort
>> consists of:
>>
>> bpy.context.screen.scene =
>> bpy.data.scenes['scene_to_export']
>> bpy.ops.wm.collada_export(filepath='output_file.dae')
>>
>> but the first line does not work (I have tried other ways,
>> but they
>> all fundamentally involve setting the scene of the current
>> screen.).
>> It fails silently, and neither changes the scene value of
>> the screen
>> or bpy.context.scene, which is what I really want to
>> change. Looking
>> at the api the only place I can see where the option to set
>> the scene
>> is as part of a screen, and whilst that works when running
>> the gui
>> (i.e. if entered into the console.) when run from the
>> command line it
>> exports the contents of whatever scene was set when the
>> .blend file
>> was saved, rather than the desired scene.
>
> You should be able to do it like this (assuming I don't mess up the syntax):
>
> bpy.ops.wm.collada_export(C={"scene":bpy.data.scenes['scene_to_export']}, filepath='output_file.dae')
>
> This sets up a custom context for that operator, its values will overwrite whatever is in bpy.context.
>
> Martin
>
>
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