text: # ##### BEGIN GPL LICENSE BLOCK #####
  #
  #  This program is free software; you can redistribute it and/or
  #  modify it under the terms of the GNU General Public License
  #  as published by the Free Software Foundation; either version 2
  #  of the License, or (at your option) any later version.
  #
  #  This program is distributed in the hope that it will be useful,
  #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #  GNU General Public License for more details.
  #
  #  You should have received a copy of the GNU General Public License
  #  along with this program; if not, write to the Free Software Foundation,
  #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  #
  # ##### END GPL LICENSE BLOCK #####
  
  # <pep8 compliant>
  
  bl_info = {
      "name": "NewTek MDD format",
      "author": "Bill L.Nieuwendorp",
      "version": (1, 0, 1),
      "blender": (2, 57, 0),
      "location": "File > Import-Export",
      "description": "Import-Export MDD as mesh shape keys",
      "warning": "",
      "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
                  "Scripts/Import-Export/NewTek_OBJ",
      "support": 'OFFICIAL',
      "category": "Import-Export"}
  
  if "bpy" in locals():
      import importlib
      if "import_mdd" in locals():
          importlib.reload(import_mdd)
      if "export_mdd" in locals():
          importlib.reload(export_mdd)
  
  
  import bpy
  from bpy.props import (
          BoolProperty,
          FloatProperty,
          IntProperty,
          StringProperty,
          )
  from bpy_extras.io_utils import ExportHelper, ImportHelper
  
  
  class ImportMDD(bpy.types.Operator, ImportHelper):
      """Import MDD vertex keyframe file to shape keys"""
      bl_idname = "import_shape.mdd"
      bl_label = "Import MDD"
      bl_options = {'UNDO'}
  
      filename_ext = ".mdd"
  
      filter_glob = StringProperty(
              default="*.mdd",
              options={'HIDDEN'},
              )
      frame_start = IntProperty(
              name="Start Frame",
              description="Start frame for inserting animation",
              min=-300000, max=300000,
              default=0,
              )
      frame_step = IntProperty(
              name="Step",
              min=1, max=1000,
              default=1,
              )
  
      @classmethod
      def poll(cls, context):
          obj = context.active_object
          return (obj and obj.type == 'MESH')
  
      def invoke(self, context, event):
          scene = context.scene
          self.frame_start = scene.frame_start
  
          return super().invoke(context, event)
  
      def execute(self, context):
          keywords = self.as_keywords(ignore=("filter_glob",))
  
          from . import import_mdd
          return import_mdd.load(context, **keywords)
  
  
  class ExportMDD(bpy.types.Operator, ExportHelper):
      """Animated mesh to MDD vertex keyframe file"""
      bl_idname = "export_shape.mdd"
      bl_label = "Export MDD"
  
      filename_ext = ".mdd"
      filter_glob = StringProperty(default="*.mdd", options={'HIDDEN'})
  
      # get first scene to get min and max properties for frames, fps
  
      minframe = 0
      maxframe = 300000
      minfps = 1.0
      maxfps = 120.0
  
      # List of operator properties, the attributes will be assigned
      # to the class instance from the operator settings before calling.
      fps = FloatProperty(
              name="Frames Per Second",
              description="Number of frames/second",
              min=minfps, max=maxfps,
              default=25.0,
              )
      frame_start = IntProperty(
              name="Start Frame",
              description="Start frame for baking",
              min=minframe, max=maxframe,
              default=1,
              )
      frame_end = IntProperty(
              name="End Frame",
              description="End frame for baking",
              min=minframe, max=maxframe,
              default=250,
              )
      use_rest_frame = BoolProperty(
              name="Rest Frame",
              description="Write the rest state at the first frame",
              default=False,
              )
  
      @classmethod
      def poll(cls, context):
          obj = context.active_object
          return (obj and obj.type == 'MESH')
  
      def invoke(self, context, event):
          scene = context.scene
          self.frame_start = scene.frame_start
          self.frame_end = scene.frame_end
          self.fps = scene.render.fps / scene.render.fps_base
  
          return super().invoke(context, event)
  
      def execute(self, context):
          keywords = self.as_keywords(ignore=("check_existing", "filter_glob"))
  
          from . import export_mdd
          return export_mdd.save(context, **keywords)
  
  
  def menu_func_import(self, context):
      self.layout.operator(ImportMDD.bl_idname,
                           text="Lightwave Point Cache (.mdd)",
                           )
  
  
  def menu_func_export(self, context):
      self.layout.operator(ExportMDD.bl_idname,
                           text="Lightwave Point Cache (.mdd)",
                           )
  
  
  def register():
      bpy.utils.register_module(__name__)
  
      bpy.types.INFO_MT_file_import.append(menu_func_import)
      bpy.types.INFO_MT_file_export.append(menu_func_export)
  
  
  def unregister():
      bpy.utils.unregister_module(__name__)
  
      bpy.types.INFO_MT_file_import.remove(menu_func_import)
      bpy.types.INFO_MT_file_export.remove(menu_func_export)
  
  if __name__ == "__main__":
      register()
  