__init__.py

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#
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# <pep8-80 compliant>

bl_info = {
    "name": "Autodesk FBX format",
    "author": "Campbell Barton",
    "blender": (2, 5, 8),
    "api": 38691,
    "location": "File > Import-Export",
    "description": "Export FBX meshes, UV's, vertex colors, materials, "
                   "textures, cameras, lamps and actions",
    "warning": "",
    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/"
                "Scripts/Import-Export/Autodesk_FBX",
    "tracker_url": "",
    "support": 'OFFICIAL',
    "category": "Import-Export"}


if "bpy" in locals():
    import imp
    if "export_fbx" in locals():
        imp.reload(export_fbx)


import bpy
from bpy.props import StringProperty, BoolProperty, FloatProperty, EnumProperty

from bpy_extras.io_utils import (ExportHelper,
                                 path_reference_mode,
                                 axis_conversion,
                                 )


class ExportFBX(bpy.types.Operator, ExportHelper):
    '''Selection to an ASCII Autodesk FBX'''
    bl_idname = "export_scene.fbx"
    bl_label = "Export FBX"
    bl_options = {'PRESET'}

    filename_ext = ".fbx"
    filter_glob = StringProperty(default="*.fbx", options={'HIDDEN'})

    # List of operator properties, the attributes will be assigned
    # to the class instance from the operator settings before calling.

    use_selection = BoolProperty(
            name="Selected Objects",
            description="Export selected objects on visible layers",
            default=False,
            )
    global_scale = FloatProperty(
            name="Scale",
            description=("Scale all data. "
                         "Some importers do not support scaled armatures!"),
            min=0.01, max=1000.0,
            soft_min=0.01, soft_max=1000.0,
            default=1.0,
            )
    axis_forward = EnumProperty(
            name="Forward",
            items=(('X', "X Forward", ""),
                   ('Y', "Y Forward", ""),
                   ('Z', "Z Forward", ""),
                   ('-X', "-X Forward", ""),
                   ('-Y', "-Y Forward (Blender)", ""),
                   ('-Z', "-Z Forward", ""),
                   ),
            default='-Z',
            )
    axis_up = EnumProperty(
            name="Up",
            items=(('X', "X Up", ""),
                   ('Y', "Y Up", ""),
                   ('Z', "Z Up (Blender)", ""),
                   ('-X', "-X Up", ""),
                   ('-Y', "-Y Up", ""),
                   ('-Z', "-Z Up", ""),
                   ),
            default='Y',
            )

    object_types = EnumProperty(
            name="Object Types",
            options={'ENUM_FLAG'},
            items=(('EMPTY', "Empty", ""),
                   ('CAMERA', "Camera", ""),
                   ('LAMP', "Lamp", ""),
                   ('ARMATURE', "Armature", ""),
                   ('MESH', "Mesh", ""),
                   ),
            default={'EMPTY', 'CAMERA', 'LAMP', 'ARMATURE', 'MESH'},
            )

    use_mesh_modifiers = BoolProperty(
            name="Apply Modifiers",
            description="Apply modifiers to mesh objects",
            default=True,
            )
    mesh_smooth_type = EnumProperty(
            name="Smoothing",
            items=(('OFF', "Off", "Don't write smoothing"),
                   ('FACE', "Face", "Write face smoothing"),
                   ('EDGE', "Edge", "Write edge smoothing"),
                   ),
            default='FACE',
            )

    use_mesh_edges = BoolProperty(
            name="Include Edges",
            description=("Edges may not be necessary, can cause import "
                         "pipeline errors with XNA"),
            default=False,
            )
    use_anim = BoolProperty(
            name="Include Animation",
            description="Export keyframe animation",
            default=True,
            )
    use_anim_action_all = BoolProperty(
            name="All Actions",
            description=("Export all actions for armatures or just the "
                         "currently selected action"),
            default=True,
            )
    use_default_take = BoolProperty(
            name="Include Default Take",
            description=("Export currently assigned object and armature "
                         "animations into a default take from the scene "
                         "start/end frames"),
            default=False
            )
    use_anim_optimize = BoolProperty(
            name="Optimize Keyframes",
            description="Remove double keyframes",
            default=True,
            )
    anim_optimize_precision = FloatProperty(
            name="Precision",
            description=("Tolerence for comparing double keyframes "
                        "(higher for greater accuracy)"),
            min=1, max=16,
            soft_min=1, soft_max=16,
            default=6.0,
            )
    path_mode = path_reference_mode
    use_rotate_workaround = BoolProperty(
            name="Rotate Animation Fix",
            description="Disable global rotation, for XNA compatibility",
            default=False,
            )
    xna_validate = BoolProperty(
            name="XNA Strict Options",
            description="Make sure options are compatible with Microsoft XNA",
            default=False,
            )
    batch_mode = EnumProperty(
            name="Batch Mode",
            items=(('OFF', "Off", "Active scene to file"),
                   ('SCENE', "Scene", "Each scene as a file"),
                   ('GROUP', "Group", "Each group as a file"),
                   ),
            )
    use_batch_own_dir = BoolProperty(
            name="Own Dir",
            description="Create a dir for each exported file",
            default=True,
            )
    use_metadata = BoolProperty(
            name="Use Metadata",
            default=True,
            options={'HIDDEN'},
            )

    # Validate that the options are compatible with XNA (JCB)
    def _validate_xna_options(self):
        if not self.xna_validate:
            return False
        changed = False
        if not self.use_rotate_workaround:
            changed = True
            self.use_rotate_workaround = True
        if self.global_scale != 1.0:
            changed = True
            self.global_scale = 1.0
        if self.mesh_smooth_type != 'OFF':
            changed = True
            self.mesh_smooth_type = 'OFF'
        if self.use_anim_optimize:
            changed = True
            self.use_anim_optimize = False
        if self.use_mesh_edges:
            changed = True
            self.use_mesh_edges = False
        if self.use_default_take:
            changed = True
            self.use_default_take = False
        if self.object_types & {'CAMERA', 'LAMP', 'EMPTY'}:
            changed = True
            self.object_types -= {'CAMERA', 'LAMP', 'EMPTY'}
        if self.path_mode != 'STRIP':
            changed = True
            self.path_mode = 'STRIP'
        return changed

    @property
    def check_extension(self):
        return self.batch_mode == 'OFF'

    def check(self, context):
        is_def_change = super().check(context)
        is_xna_change = self._validate_xna_options()
        return (is_xna_change or is_def_change)

    def execute(self, context):
        from mathutils import Matrix
        if not self.filepath:
            raise Exception("filepath not set")

        global_matrix = Matrix()

        global_matrix[0][0] = \
        global_matrix[1][1] = \
        global_matrix[2][2] = self.global_scale

        if not self.use_rotate_workaround:
            global_matrix = (global_matrix *
                             axis_conversion(to_forward=self.axis_forward,
                                             to_up=self.axis_up,
                                             ).to_4x4())

        keywords = self.as_keywords(ignore=("axis_forward",
                                            "axis_up",
                                            "global_scale",
                                            "check_existing",
                                            "filter_glob",
                                            "xna_validate",
                                            ))

        keywords["global_matrix"] = global_matrix

        from . import export_fbx
        return export_fbx.save(self, context, **keywords)


def menu_func(self, context):
    self.layout.operator(ExportFBX.bl_idname, text="Autodesk FBX (.fbx)")


def register():
    bpy.utils.register_module(__name__)

    bpy.types.INFO_MT_file_export.append(menu_func)


def unregister():
    bpy.utils.unregister_module(__name__)

    bpy.types.INFO_MT_file_export.remove(menu_func)

if __name__ == "__main__":
    register()