Python in Motionbuilder, bug in the SDK?

Tools MotionBuilder
#1

So here’s the deal: I have some code that calls FBApplication.LoadAnimationOnCharacter, that works fine. However, if I use QT’s QFileDialog.getOpenFileName before calling the code, I get this error. Note these are the arguments I’m passing in, in order:

<pyfbsdk.FBApplication object at 0x000000003140DF48>
C:/depot/content/WOD/Animation/Male/Common/Action_Loot_Stand_Loop_01.fbx
<pyfbsdk.FBCharacter object at 0x0000000028C856D8>
<pyfbsdk.FBFbxOptions object at 0x000000003140DF98>
<pyfbsdk.FBPlotOptions object at 0x0000000031189048>


Traceback (most recent call last):
  File "C:\depot\games\branches\sandbox\CARBON-ANIMATION-PIPELINE\carbon	ools\pipeline\motionbuilder\uieditor.py", line 95, in _OnClick
    control.carboncallback()
  File "C:\depot\games\branches\sandbox\CARBON-ANIMATION-PIPELINE\carbon	ools\pipeline\motionbuilder\activefile.py", line 67, in LoadCharacterAnimation
    animsaveload.LoadAnimationOnCharacter(character, filename)
  File "C:\depot\games\branches\sandbox\CARBON-ANIMATION-PIPELINE\carbon	ools\pipeline\motionbuilder\animsaveload.py", line 25, in LoadAnimationOnCharacter
    application.LoadAnimationOnCharacter(filename, character, fbxopts, plotopts)
Boost.Python.ArgumentError: Python argument types in
    FBApplication.LoadAnimationOnCharacter(FBApplication, QString, FBCharacter, FBFbxOptions, FBPlotOptions)
did not match C++ signature:
    LoadAnimationOnCharacter(class PYFBSDK::FBApplication_Wrapper {lvalue}, char * __ptr64, class PYFBSDK::FBCharacter_Wrapper {lvalue}, class PYFBSDK::FBFbxOptions_Wrapper {lvalue}, class PYFBSDK::FBPlotOptions_Wrapper {lvalue})

I’ve verified multiple times the types match, and this ONLY happens after I do Qt’s QFileDialog.getOpenFileName. I’ve tried sticking shit into globals, del’ing things after I was done with them, etc., to no avail. Any ideas WTF is going on? This is the first bug I’ve run into anywhere that I have no ideas about and no workarounds for (is there another way to open up a file dialog in MoBu?).

Please help because I’m about to lose it.

#2

Hi Rob! I have worked a bit with PyMobu and I use something like this for opening a file dialog:

from pyfbsdk import *
myFilePopup = FBFilePopup()
myFilePopup.Execute()
myFile = myFilePopup.FullFilename
print myFile

It has always worked fine for me.

Cheers,
Seigi

#3

One theory. The “LoadAnimationOnCharacter” method is expecting a str as the second arg. Though since you used Qt, you’re passing in a QString. Try wrapping you arg in “str()” when passing it to the “LoadAnimationOnCharacter” method.

My best guess…

#4

Hey Seigi, thanks! I looked for a builtin mobu UI class for the file dialog but didn’t see that one, I’m sure that’ll do the trick!

Stev, that’s a good thought. I think I tried using a unicode string but I’ll double check. That’d be quite a sinister problem (but certainly fits the symptoms!).

#5

[QUOTE=Rob Galanakis;11822]

Please help because I’m about to lose it.[/QUOTE]

Welcome to a regular day when working with Motionbuilder :wink:

#6

That was it, stev! Thanks! However I’m going to post yet another bug…

#7

Glad it worked. Get used to losing your mind though…

#8

pyfbsdk is so poorly organized compared to PyMEL’s awesome object model.

I’ve kind of started to write a bunch of core classes imitating commands and functionality of maya.cmds/PyMEL. There’s also PyMobu if everybody wants to contribute to an openSource project (http://code.google.com/p/pymobu/).