[Bf-committers] [Soc-2012-dev] loss of data after fbx-import and reopening of saved file

Alexander Gessler alexander.gessler at gmx.net
Tue Sep 4 19:10:38 CEST 2012 

Hi Benjamin, bf-committers, soc-2012-dev

sorry for the late response, I was off and busy for some days.

I can confirm the issue - this is something really serious. In my tests
it didn't even work when I re-opened Blender for the first-time.

Does anybody have an idea of what my assimp importing code might be
doing wrong when the following sequence:

* import file into an empty blender scene - ok, geometry is there
* save .blend - ok, file is saved
* open the same blend

yields lots of "Object <name> lost data" messages in the console?

there's also a message on " search for unknown op
'CONSOLE_OT_copy_as_script'" but it does not seem to be related since it
also appears if I save and load the default scene.

I'm really puzzled and I don't know enough of Blender to have an idea of
what might be going wrong here. Any ideas?

Bye, Alex


On 8/31/2012 10:44 PM, Benjamin Dahl - post at bennyd.de wrote:
> Strange. I tried to test a workflow like the following and blender
> imported the fbx perfectly and saved the file with all data which I can
> reopen now. But! It only worked in the first run. When I try it now
> exactly the same way again blender loses all the data when reopening the
> file.
> 
> The workflow:
> Exported a C4D file from archicad, opened that file in Cinema4D,
> exported from there to fbx and imported that file into blender. Import
> works nice.
> 1st run: could save the file and reopen
> 2nd+x run: loss of all data when reopening.
> 
> Relevant files here:
> https://dl.dropbox.com/u/1944337/Betatest/TestArchicadC4DBlender.zip
> 
> cheers
> Benny
> 
> BTW: assimp does not load the ifc file, I exported from archicad. I get
> errors. Another ifc-plugin from http://ifcopenshell.org/ifcblender.html
> will import the file but hierarchy is missing so it's useless. Would be
> nice if assimp would load the ifc as well as preserve hierarchy and
> translate materials.
> 
> 
> Am 31.08.12 15:41 schrieb Benjamin Dahl - post at bennyd.de:
>> Hello Alex,
>>
>> I'm very happy to announce that I was able to build blender gsoc 2012
>> bratwurst with fbx-import on mac today. I had to switch my build
>> environment to clang as the used compiler.
>>
>> I than began to test the fbx-importer immediately.
>> First: The import of my test-fbx-file worked as expected allthough I'm
>> still missing the feature of changing orientation to y-up, in order to
>> get files from cinema 4d into blender right. The materials from cinema
>> 4d haven't been translated right as well, but that's not so much
>> important at the moment.
>>
>> After trying to save and reopen the file, I experienced, that all
>> Objects, which were previously importet, were lost.
>>
>> I importet everything again to a new file and played around with import
>> options and moved the imported objects around and then tried to save
>> again, but the objects were gone, when I reopend the file again.
>>
>> I then played around some more and suddenly I could save one file, which
>> I was able to reopen with all objects. Strangely I haven't been able to
>> reproduce that in any case. Everytime when I import stuff from fbx-files
>> (I tried several) and save the file with blender, it loses all data
>> after reopening.
>>
>> Some weeks ago you send me a blend-file which you created from my test
>> fbx-file. When I open that file, there are no objects, too. First I
>> thought, it had to do with different versions of blender, but today I
>> realized it must have to do with something else.
>>
>> I put you all my relevant files and logs here:
>> http://dl.dropbox.com/u/1944337/Betatest/blenderemptyfile.zip
>>
>> maybe, you are able to find the bug.
>>
>> cheers
>>
>> benny
>>
>>
>>
>> Am 11.08.12 14:29 schrieb Alexander Gessler:
>>> Sure,
>>>
>>> http://www.greentoken.de/privat/benny_fbx_import.blend
>>>
>>> I hope it can be opened by a regular, non bratwurst blender.
>>>
>>> Bye, Alex
>>>
>>> On 8/11/2012 7:35 AM, Benjamin Dahl - post at bennyd.de wrote:
>>>> Hey Alex,
>>>>
>>>> this looks closely to what I saw in Cinema 4D and was going to expect
>>>> from the fbx-import so far. Thanks for that.
>>>> I'm going on vacation for a week today and will try this after coming back.
>>>>
>>>> btw. can you send me the .blend file?
>>>>
>>>> Cheers
>>>>
>>>> Benny
>>>>
>>>>
>>>>
>>>> Am 11.08.12 05:26 schrieb Alexander Gessler:
>>>>> Hi again,
>>>>>
>>>>> I fixed the first issue - negative material indices are now resolved to
>>>>> the default material.
>>>>>
>>>>> What I get is this:
>>>>>
>>>>> http://www.greentoken.de/privat/fbx2.png
>>>>>
>>>>> Does that look right? I'm asking because I can't get Autodesk FBX
>>>>> Converter to show something meaningful for this scene.
>>>>>
>>>>> The geometry is a bit strange, but not so strange that I would be sure
>>>>> that it was not intended as such.
>>>>>
>>>>> Would be great if you could spare the time for another try! (you will
>>>>> need to svn update on bratwurst and rebuild)
>>>>>
>>>>> Bye, Alex
>>>>>
>>>>> On 8/10/2012 4:19 PM, Alexander Gessler wrote:
>>>>>> Hi Benny,
>>>>>>
>>>>>> thanks for posting the file.
>>>>>>
>>>>>> I can confirm its an issue with the importer.
>>>>>>
>>>>>> The file specifies negative material indices (which I didn't see
>>>>>> before in any fbx file I've encountered so far).
>>>>>>
>>>>>> The message assimp dies with is:
>>>>>>
>>>>>> "FBX-DOM: encountered negative integer index" (+ line, column number)
>>>>>>
>>>>>> Running on Windows, I do actually see that error message show up in
>>>>>> Blender, too - strange. Are you sure it doesn't show up? Maybe you can
>>>>>> grep for the exact text?
>>>>>>
>>>>>> Will fix the issue.
>>>>>>
>>>>>>> And still no debug output. Can you imagine how frustrating this
>>>>>>> is?
>>>>>>
>>>>>> Sure - but this is WIP, not a feature for productive use yet :-/ You
>>>>>> will need to give it some months to become mature.
>>>>>>
>>>>>> Bye, Alex
>>>>>>
>>>>>>
>>>>>> On 8/10/2012 3:35 PM, Benjamin Dahl - post at bennyd.de wrote:
>>>>>>> Hi Alex,
>>>>>>>
>>>>>>> yes I'm quite sure I build with fbx and assimp support since it
>>>>>>> shows up in the menu (see screenshot) 
>>>>>>> https://dl.dropbox.com/u/1944337/Betatest/Bildschirmfoto%202012-08-10%20um%2015.03.12.png
>>>>>>>
>>>>>>>  and I doublechecked it before building. This is the part from my
>>>>>>> scons user-config.py
>>>>>>>
>>>>>>> # note: WITH_BF_FBX==True needs WITH_BF_ASSIMP to be enabled as
>>>>>>> well WITH_BF_ASSIMP = True WITH_BF_FBX = True
>>>>>>>
>>>>>>>
>>>>>>> … and I also checked, if it works with fbx files previously
>>>>>>> converted to 2013 ascii format. It doesn't. 
>>>>>>> https://dl.dropbox.com/u/1944337/Betatest/Bildschirmfoto%202012-08-10%20um%2015.18.16.png
>>>>>>>
>>>>>>>  And still no debug output. Can you imagine how frustrating this
>>>>>>> is?
>>>>>>>
>>>>>>> Can you check, if this is an issue with my file? 
>>>>>>> https://dl.dropbox.com/u/1944337/Betatest/Raum_1_Final_benny1_2013ascii.fbx
>>>>>>>
>>>>>>>  The fbx-file is rather simple and for testing purpose only so far.
>>>>>>> In the Future I have to work together with someone who is using
>>>>>>> cinema4d for architecture visualizations and we have bad
>>>>>>> experiences with the collada exchange between cinema4d and
>>>>>>> blender. So we're hoping the fbx-bridge will do it better then.
>>>>>>>
>>>>>>> bye Benny
>>>>>>>
>>>>>>>
>>>>>>> Am 10.08.12 12:52 schrieb Alexander Gessler:
>>>>>>>> Hi Benny,
>>>>>>>>
>>>>>>>> you need to convert all your fbx files to 2013 _text_ (ascii)
>>>>>>>> format first (using FBX Converter!).
>>>>>>>>
>>>>>>>> Are you sure you have built with WITH_ASSIMP and WITH_FBX?
>>>>>>>>
>>>>>>>> Normally you should get a whole bunch of logging errors because
>>>>>>>> I'm basically piping assimp's entire logging into Blender.
>>>>>>>>
>>>>>>>> Hope that helps.
>>>>>>>>
>>>>>>>> Bye, Alex
>>>>>>>>
>>>>>>>> On 8/10/2012 12:52 PM, Benjamin Dahl - post at bennyd.de wrote:
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> After getting the blender bratwurst build with fbx import to
>>>>>>>>> run on my ubuntu machine yesterday, I was so happy because I
>>>>>>>>> thought, I can start to test the importer now. Apperently this
>>>>>>>>> has been a delusion. Trying to import either my own fbx files
>>>>>>>>> or the samples from the autodesk fbx-converter didn't work at
>>>>>>>>> all. Nothing was imported and as a result I had this error in
>>>>>>>>> the »info window« in blender:
>>>>>>>>>
>>>>>>>>> »Errors found during importing. Please see console for error
>>>>>>>>> log.«
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Since I launched blender from command line, I thought errors
>>>>>>>>> must be found there. But they aren't.
>>>>>>>>>
>>>>>>>>> So I compiled the whole thing again now with the BF_Debug
>>>>>>>>> option enabled, but no error log appears when trying to import
>>>>>>>>> fbx-files.
>>>>>>>>>
>>>>>>>>> Then I started blender again with gdb ./blender but even there
>>>>>>>>> are no more error messages.
>>>>>>>>>
>>>>>>>>> Last thing I tried, was starting blender from command line with
>>>>>>>>>  --debug-all option but I got so many messages that I tried to 
>>>>>>>>> filter that with grep or wrote them into a error.log file like 
>>>>>>>>> this
>>>>>>>>>
>>>>>>>>> ./blender --debug-all | grep fbx ./blender --debug-all >
>>>>>>>>> error.log
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> No Output there.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> It's completely frustrating, that I managed to compile the
>>>>>>>>> whole stuff and testing fails at the early beginning now,
>>>>>>>>> because nothing is imported
>>>>>>>>>
>>>>>>>>> Every help is appreciated. There's nothing more I'd love to
>>>>>>>>> have than a blender binary build with fbx-import enabled.
>>>>>>>>>
>>>>>>>>> cheers
>>>>>>>>>
>>>>>>>>> Benny
>>>>>>>>>
>>>>>>>>> -- Dipl.-Des. Benjamin Dahl Finowstraße 9 10247 Berlin Germany
>>>>>>>>>
>>>>>>>>> Phone: +49 (30) 83217244 (Berlin) Mobile: +49 (176) 21300553
>>>>>>>>>
>>>>>>>>> Email: post at bennyd.de Web: http://www.bennyd.de/
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________ Soc-2012-dev 
>>>>>>>>> mailing list Soc-2012-dev at blender.org 
>>>>>>>>> http://lists.blender.org/mailman/listinfo/soc-2012-dev
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________ Soc-2012-dev
>>>>>>> mailing list Soc-2012-dev at blender.org 
>>>>>>> http://lists.blender.org/mailman/listinfo/soc-2012-dev
>>>>>>>
>>>>>>
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>>>>>>
>>>>>
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>>>>
>>>
>>
>>
>

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