##########################################################
# Custom Blender -> Unity Pipeline
# http://www.mimimi-productions.com, 2012
# Version: 1.0
#
# Thanks to kastoria for his support!
# http://www.blenderartists.org
##########################################################
# Fixes the -90 degree (x-axis) problem for Unity.
# Artists and coders simply work as they should.
# -> No more custom rotation-fixes in Unity or Blender.
##########################################################

# Rotation matrix of -90 around the X-axis
rot_x_neg90 = Matrix.Rotation(-math.pi/2.0, 4, 'X')

# Iterate the objects in the file, only root level and rotate them
for obj in bpy.data.objects:
   if obj.parent != None:
      continue
   obj.matrix_world = rot_x_neg90 * obj.matrix_world

# apply all(!) transforms
for obj in bpy.data.objects:
   bpy.ops.object.transform_apply(rotation=True)

# custom args
kwargs = dict(   # we dont need the rotation in the exporter anymore
            #global_matrix=Matrix.Rotation(-math.pi / 2.0, 4, 'X'),
            use_selection=False,
            # not sure if we really need 'EMPTY' in our workflow, but we usually don't need the animation-helpers
            object_types={'ARMATURE', 'MESH'},
            use_mesh_modifiers=True,
            use_anim=True,
            use_anim_optimize=False,
            use_anim_action_all=True,
            batch_mode='OFF',
            # never used, especially for non-animated objects
            use_default_take=False,
            )
            
# export!
io_scene_fbx.export_fbx.save(FakeOp(), bpy.context, filepath=outfile, **kwargs)