[Bf-committers] SystemError when using simple mesh commands in scripts started from the command line...

Wed Nov 11 05:49:04 CET 2009

Hi Campbell,

On Mon, 2009-11-09 at 08:55 +0100, Campbell Barton wrote:
> Unless your prepared for debugging/fixing internals Id not recommend
> testing background mode at the moment.

I would like to help debugging and fixing things - if I only had some
more time (...better enough money to spend more time on things I'd like
to do).

On Tue, 2009-11-10 at 12:26 +0100, Campbell Barton wrote:
> For durian we need a renderfarm and a auto-rigging system, both will
> use the python api so it will get some testing & development with this
> for sure.

Thank you!

I'll wait :)

Cheers, Dietrich

On Tue, 2009-11-10 at 12:26 +0100, Campbell Barton wrote:
> there are no plans to get this working in the near term and a fair
> number of missing features you could call critical.
> Id not say batch processing is necessarily linked with background mode either.
> 
> For durian we need a renderfarm and a auto-rigging system, both will
> use the python api so it will get some testing & development with this
> for sure.
> 
> On Tue, Nov 10, 2009 at 8:39 AM, Goat Man <goatman.py at gmail.com> wrote:
> > how long do we have to wait for python scripts to work again in background
> > mode?  Batch processing is a critical feature for dealing with large amounts
> > of data.  Blender2.4x was a little weak in this area, i'm hoping for
> > something much better.
> >
> > On Mon, Nov 9, 2009 at 3:55 PM, Campbell Barton <ideasman42 at gmail.com>wrote:
> >
> >> Python can define its own context which may help to work in background
> >> mode, I think this would be the script context your asking about but I
> >> didn't test this yet.
> >>
> >> At first I tried to generate python documentation in background mode
> >> but it didn't missed the python operators since they are not loaded.
> >>
> >> AFAIK we haven't even tried to have the python api work in background
> >> mode - (speaking for myself at least)
> >>
> >> Unless your prepared for debugging/fixing internals Id not recommend
> >> testing background mode at the moment.
> >>
> >> On Mon, Nov 9, 2009 at 8:11 AM, Dietrich Bollmann <diresu at web.de> wrote:
> >> > Hi Martin :)
> >> >
> >> >>
> >> > http://wiki.blender.org/index.php/BlenderDev/Blender2.5/WM_Architecture
> >> >
> >> > Interesting reading. Sounds much more involved than I initially
> >> > thought... :)
> >> >
> >> > Reading this document, I have the impression that some parts are still
> >> > under heavy development.  Especially the context handling looks like not
> >> > being solved for the moment.  I also seem not to be the first who
> >> > stumbles about the problem of scripts executed from the command line...
> >> >
> >> > So probably I just should stop to ask stupid questions, let you work
> >> > and ... wait :)  The only thing I don't like about this option is, that
> >> > everything I will create until then is already outdated...
> >> >
> >> > The other option - to try to hack things myself - probably makes
> >> > everything only worse :)
> >> >
> >> > ...Of course I would be happy to ask, why you don't simply move the code
> >> > for executing the command line scripts to some place after the
> >> > initialization of the window manager, create some special script context
> >> > and than use some "non-interactive" kind of flag to make the event
> >> > handler skip the gui polling...
> >> >
> >> > But I am sure that you already have thought about better ways to handle
> >> > this problem and are searching some more general and elegant solution :)
> >> >
> >> > So I'll wait...
> >> >
> >> > Thanks for the interesting Mails!
> >> >
> >> > Regards, Dietrich
> >> >
> >> >
> >> > On Sun, 2009-11-08 at 13:16 -0800, Martin Poirier wrote:
> >> >> Hi,
> >> >>
> >> >> --- On Sun, 11/8/09, Dietrich Bollmann <diresu at web.de> wrote:
> >> >>
> >> >> > So invoke would be used for functionality which for
> >> >> > instance use mouse
> >> >> > input to rotate some object?
> >> >>
> >> >> Yes. Like transform, loop cut, lasso, brush select, ...
> >> >>
> >> >> > And operations used in a script which does not need user
> >> >> > input would
> >> >> > only use exec?
> >> >>
> >> >> Hopefully.
> >> >>
> >> >> > Probably the bpy.ops.mesh.primitive_cube_add() command than
> >> >> > would be of
> >> >> > the second kind and not require the window context?
> >> >>
> >> >> It's not as clear cut as that. Some operator supply both an invoke and
> >> exec function, so it has to be decided based on calling function, not
> >> operator type.
> >> >>
> >> >> > Just by curiosity:
> >> >> >
> >> >> > Concerning interactive commands, why isn't it enough to
> >> >> > specify the
> >> >> > window(s) when registering an event handler?
> >> >>
> >> >> It's not so much the window that is missing but the whole windowmanager.
> >> When running scripts from command line, it tries to run them before the UI
> >> is fully initialized.
> >> >>
> >> >> > Aren't interactive commands (event handlers) reacting on
> >> >> > user input
> >> >> > invoked by events in the queue of the window they
> >> >> > registered for?  As
> >> >> > there is exactly one event queue per window the window
> >> >> > should be clear,
> >> >> > no?
> >> >>
> >> >> The window missing from context only applied to operator running from
> >> the command line (or in background mode), otherwise it is not a problem.
> >> >>
> >> >> > Non-interactive commands on the other hand wouldn't need
> >> >> > the context at
> >> >> > all.  (At least if they only manipulate a scene and
> >> >> > not some window
> >> >> > itself.)
> >> >>
> >> >> Context is like a generalized dictionary. They would take the current
> >> scene from the context too.
> >> >>
> >> >> > Are there documents which explain Blenders new event
> >> >> > system?
> >> >>
> >> >> Some of it is on this wiki, like on this page for example:
> >> >>
> >> >> http://wiki.blender.org/index.php/BlenderDev/Blender2.5/WM_Architecture
> >> >>
> >> >> Martin
> >> >>
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> >>
> >>
> >> --
> >> - Campbell
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> 
> 