__init__.py

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bl_info = {
    "name": "DirectX X Format",
    "author": "Chris Foster (updated by hex)",
    "version": (4, 0, 0),
    "blender": (2, 80, 0),
    "location": "File > Export > DirectX (.x)",
    "description": "Export mesh vertices, UV's, materials, textures, "
                   "vertex colors, armatures, empties, and actions.",
    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
                "Scripts/Import-Export/DirectX_Exporter",
    "category": "Import-Export"}


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


class ExportDirectX(bpy.types.Operator):
    """Export selection to DirectX"""

    bl_idname = "export_scene.x"
    bl_label = "Export DirectX"

    filepath : StringProperty(subtype='FILE_PATH')

    # Export options
    # Defaults have been changed to Right Z-up animated

    SelectedOnly : BoolProperty(
        name="Export Selected Objects Only",
        description="Export only selected objects",
        default=True)

    CoordinateSystem : EnumProperty(
        name="Coordinate System",
        description="Use the selected coordinate system for export",
        items=(('LEFT_HANDED', "Left-Handed", "Use a Y up, Z forward system or a Z up, -Y forward system  (D3D, Irrlicht)"),
               ('RIGHT_HANDED', "Right-Handed", "Use a Y up, -Z forward system or a Z up, Y forward system (GL, Blender)")),
        default='RIGHT_HANDED')

    UpAxis : EnumProperty(
        name="Up Axis",
        description="The selected axis points upward",
        items=(('Y', "Y", "The Y axis points up"),
               ('Z', "Z", "The Z axis points up")),
        default='Z')

    ExportMeshes : BoolProperty(
        name="Export Meshes",
        description="Export mesh objects",
        default=True)

    ExportNormals : BoolProperty(
        name="    Export Normals",
        description="Export mesh normals",
        default=True)

    # FlipNormals : BoolProperty(
        # name="        Flip Normals",
        # description="Flip mesh normals before export",
        # default=False)

    ExportUVCoordinates : BoolProperty(
        name="    Export UV Coordinates",
        description="Export mesh UV coordinates, if any",
        default=True)

    # ExportMaterials : BoolProperty(
        # name="    Export Materials",
        # description="Export material properties and reference image textures",
        # default=False)

    ExportActiveImageMaterials : BoolProperty(
        name="        Reference Active Images as Textures",
        description="Reference the active image of each face as a texture, "\
            "as opposed to the image assigned to the material",
        default=False)

    ExportVertexColors : BoolProperty(
        name="    Export Vertex Colors",
        description="Export mesh vertex colors, if any",
        default=True)

    ExportSkinWeights : BoolProperty(
        name="    Export Skin Weights",
        description="Bind mesh vertices to armature bones",
        default=True)

    ApplyModifiers : BoolProperty(
        name="    Apply Modifiers",
        description="Apply the effects of object modifiers before export",
        default=True)

    ExportArmatureBones : BoolProperty(
        name="Export Armature Bones",
        description="Export armatures bones",
        default=True)

    ExportRestBone : BoolProperty(
        name="    Export Rest Position",
        description="Export bones in their rest position (recommended for "\
            "animation)",
        default=True)

    ExportAnimation : BoolProperty(
        name="Export Animations",
        description="Export object and bone animations.  Data is exported for "\
            "every frame",
        default=True)

    KeyframesRotation : BoolProperty(
        name="Rotation Keyframes",
        description="Include keyframes for rotation.",
        default=True)

    KeyframesPosition : BoolProperty(
        name="Position Keyframes",
        description="Include keyframes for position.",
        default=True)

    KeyframesScale : BoolProperty(
        name="Scale Keyframes",
        description="Include keyframes for scale.",
        default=False)

    KeyframesClean : BoolProperty(
        name="Optimize Keyframes",
        description="Remove keyframes that contribute nothing to the animation.",
        default=True)

    CurvesClean : BoolProperty(
        name="Optimize Curves",
        description="Remove animation curves with identity transforms.",
        default=True)

    IncludeFrameRate : BoolProperty(
        name="    Include Frame Rate",
        description="Include the AnimTicksPerSecond template which is "\
            "used by some engines to control animation speed",
        default=False)

    ExportActionsAsSets : BoolProperty(
        name="    Export Actions as AnimationSets",
        description="Export each action of each object as a separate "\
            "AnimationSet. Otherwise all current actions are lumped "\
            "together into a single set",
        default=False)

    AttachToFirstArmature : BoolProperty(
        name="        Attach Unused Actions to First Armature",
        description="Export each unused action as if used by the first "\
            "armature object",
        default=False)

    SkipTemplates : BoolProperty(
        name="Skip Templates",
        description="Don't export any templates."\
            "Some importers don't parse templates, making them dead weight."\
            "Keep this disabled unless you know you need it.",
               default=False)

    ExportNLA : BoolProperty(
        name="Export NLA Strips",
        description="Export NLA strip ranges as a Lua table in an .nla file",
               default=False)

    def execute(self, context):
        self.filepath = bpy.path.ensure_ext(self.filepath, ".x")

        from . import export_x
        Exporter = export_x.DirectXExporter(self, context)
        Exporter.Export()
        return {'FINISHED'}

    def invoke(self, context, event):
        if not self.filepath:
            self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".x")
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


def menu_func(self, context):
    self.layout.operator(ExportDirectX.bl_idname, text="DirectX (.x)")


def register():
    bpy.utils.register_class( ExportDirectX );
    bpy.types.TOPBAR_MT_file_export.append(menu_func)


def unregister():
    bpy.utils.unregister_class( ExportDirectX );
    bpy.types.TOPBAR_MT_file_export.remove(menu_func)


if __name__ == "__main__":
    register()