IO - Batch import obj and parent to null #Blender

blender-importMultipleObjsParent.py

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# <pep8 compliant>

bl_info = {
    "name": "Import multiple OBJ files",
    "author": "poor",
    "version": (0, 1, 0),
    "blender": (2, 65, 0),
    "location": "File > Import-Export",
    "description": "Import multiple OBJ files, UV's, materials",
    "warning": "",
    "wiki_url": "",
    "tracker_url": "",
    "category": "Import-Export"}


import bpy
import os

from bpy_extras.io_utils import ImportHelper

from bpy.props import (BoolProperty,
                       FloatProperty,
                       StringProperty,
                       EnumProperty,
                       CollectionProperty
                       )


class ImportMultipleObjs(bpy.types.Operator, ImportHelper):
    """This appears in the tooltip of the operator and in the generated docs"""
    bl_idname = "import_scene.multiple_objs"
    bl_label = "Import multiple OBJ's"
    bl_options = {'PRESET', 'UNDO'}

    # ImportHelper mixin class uses this
    filename_ext = ".obj"

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

    # Selected files
    files = CollectionProperty(type=bpy.types.PropertyGroup)

    # List of operator properties, the attributes will be assigned
    # to the class instance from the operator settings before calling.
    ngons_setting = BoolProperty(
            name="NGons",
            description="Import faces with more than 4 verts as ngons",
            default=True,
            )
    edges_setting = BoolProperty(
            name="Lines",
            description="Import lines and faces with 2 verts as edge",
            default=True,
            )
    smooth_groups_setting = BoolProperty(
            name="Smooth Groups",
            description="Surround smooth groups by sharp edges",
            default=True,
            )

    split_objects_setting = BoolProperty(
            name="Object",
            description="Import OBJ Objects into Blender Objects",
            default=True,
            )
    split_groups_setting = BoolProperty(
            name="Group",
            description="Import OBJ Groups into Blender Objects",
            default=True,
            )

    groups_as_vgroups_setting = BoolProperty(
            name="Poly Groups",
            description="Import OBJ groups as vertex groups",
            default=False,
            )

    image_search_setting = BoolProperty(
            name="Image Search",
            description="Search subdirs for any associated images "
                        "(Warning, may be slow)",
            default=True,
            )

    split_mode_setting = EnumProperty(
            name="Split",
            items=(('ON', "Split", "Split geometry, omits unused verts"),
                   ('OFF', "Keep Vert Order", "Keep vertex order from file"),
                   ),
            )

    clamp_size_setting = FloatProperty(
            name="Clamp Size",
            description="Clamp bounds under this value (zero to disable)",
            min=0.0, max=1000.0,
            soft_min=0.0, soft_max=1000.0,
            default=0.0,
            )
    axis_forward_setting = EnumProperty(
            name="Forward",
            items=(('X', "X Forward", ""),
                   ('Y', "Y Forward", ""),
                   ('Z', "Z Forward", ""),
                   ('-X', "-X Forward", ""),
                   ('-Y', "-Y Forward", ""),
                   ('-Z', "-Z Forward", ""),
                   ),
            default='-Z',
            )

    axis_up_setting = EnumProperty(
            name="Up",
            items=(('X', "X Up", ""),
                   ('Y', "Y Up", ""),
                   ('Z', "Z Up", ""),
                   ('-X', "-X Up", ""),
                   ('-Y', "-Y Up", ""),
                   ('-Z', "-Z Up", ""),
                   ),
            default='Y',
            )
    
    # empty parent setting
    empty_parent = BoolProperty(
            name="Create an Empty as Parent",
            description="Creates an Empty in the scene as Parent",
            default=True,
            )
    
    def create_empty(self, context, loc):
        bpy.ops.object.empty_add(location=loc)
        return (context.selected_objects[0].name)

    def draw(self, context):
        layout = self.layout

        row = layout.row(align=True)
        row.prop(self, "ngons_setting")
        row.prop(self, "edges_setting")

        layout.prop(self, "smooth_groups_setting")

        box = layout.box()
        row = box.row()
        row.prop(self, "split_mode_setting", expand=True)

        row = box.row()
        if self.split_mode_setting == 'ON':
            row.label(text="Split by:")
            row.prop(self, "split_objects_setting")
            row.prop(self, "split_groups_setting")
        else:
            row.prop(self, "groups_as_vgroups_setting")

        row = layout.split(percentage=0.67)
        row.prop(self, "clamp_size_setting")
        layout.prop(self, "axis_forward_setting")
        layout.prop(self, "axis_up_setting")

        layout.prop(self, "image_search_setting")
        
        layout.prop(self, "empty_parent")

    def execute(self, context):

        # get the folder
        folder = (os.path.dirname(self.filepath))
        
        # obj list
        obj_list = []
        
        # iterate through the selected files
        for i in self.files:

            # generate full path to file
            path_to_file = (os.path.join(folder, i.name))

            # call obj operator and assign ui values                  
            bpy.ops.import_scene.obj(filepath = path_to_file,
                                axis_forward = self.axis_forward_setting,
                                axis_up = self.axis_up_setting, 
                                use_edges = self.edges_setting,
                                use_smooth_groups = self.smooth_groups_setting, 
                                use_split_objects = self.split_objects_setting,
                                use_split_groups = self.split_groups_setting,
                                use_groups_as_vgroups = self.groups_as_vgroups_setting,
                                use_image_search = self.image_search_setting,
                                split_mode = self.split_mode_setting,
                                global_clamp_size = self.clamp_size_setting)
            
            # add the imported object to the list
            # or http://stackoverflow.com/questions/14147287/how-to-mark-last-imported-obj-in-blender
            obj_list.append(context.selected_objects[0])
        
        if self.empty_parent:
            empty_name = self.create_empty(context, (0,0,0))
            if obj_list:
                for i in obj_list:
                    bpy.data.objects[i.name].parent = bpy.data.objects[empty_name]
            
        return {'FINISHED'}


# Only needed if you want to add into a dynamic menu
def menu_func_import(self, context):
    self.layout.operator(ImportMultipleObjs.bl_idname, text="Wavefont Batch (.obj)")


def register():
    bpy.utils.register_class(ImportMultipleObjs)
    bpy.types.INFO_MT_file_import.append(menu_func_import)


def unregister():
    bpy.utils.unregister_class(ImportMultipleObjs)
    bpy.types.INFO_MT_file_import.remove(menu_func_import)


if __name__ == "__main__":
    register()

    # test call
    bpy.ops.import_scene.multiple_objs('INVOKE_DEFAULT')