Split io_scene_obj into separate io_import_obj and io_export_obj.

Also put an " - Old" by the name of the exporter.
The intention is that we won't load the Python exporter, but if a user wants
it, they can enable that addon.

1 files changed, 0 insertions, 1323 deletions

diff --git a/io_scene_obj/import_obj.py b/io_scene_obj/import_obj.py
deleted file mode 100644
index 0ba4f898..00000000
--- a/io_scene_obj/import_obj.py
+++ /dev/null
@@ -1,1323 +0,0 @@
-# ##### 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>
-
-# Script copyright (C) Campbell Barton
-# Contributors: Campbell Barton, Jiri Hnidek, Paolo Ciccone
-
-"""
-This script imports a Wavefront OBJ files to Blender.
-
-Usage:
-Run this script from "File->Import" menu and then load the desired OBJ file.
-Note, This loads mesh objects and materials only, nurbs and curves are not supported.
-
-http://wiki.blender.org/index.php/Scripts/Manual/Import/wavefront_obj
-"""
-
-import array
-import os
-import time
-import bpy
-import mathutils
-
-from bpy_extras.io_utils import unpack_list
-from bpy_extras.image_utils import load_image
-from bpy_extras.wm_utils.progress_report import ProgressReport
-
-
-def line_value(line_split):
-    """
-    Returns 1 string representing the value for this line
-    None will be returned if there's only 1 word
-    """
-    length = len(line_split)
-    if length == 1:
-        return None
-
-    elif length == 2:
-        return line_split[1]
-
-    elif length > 2:
-        return b' '.join(line_split[1:])
-
-
-def filenames_group_by_ext(line, ext):
-    """
-    Splits material libraries supporting spaces, so:
-    b'foo bar.mtl baz spam.MTL' -> (b'foo bar.mtl', b'baz spam.MTL')
-    Also handle " chars (some software use those to protect filenames with spaces, see T67266... sic).
-    """
-    # Note that we assume that if there are some " in that line,
-    # then all filenames are properly enclosed within those...
-    start = line.find(b'"') + 1
-    if start != 0:
-        while start != 0:
-            end = line.find(b'"', start)
-            if end != -1:
-                yield line[start:end]
-                start = line.find(b'"', end + 1) + 1
-            else:
-                break
-        return
-
-    line_lower = line.lower()
-    i_prev = 0
-    while i_prev != -1 and i_prev < len(line):
-        i = line_lower.find(ext, i_prev)
-        if i != -1:
-            i += len(ext)
-        yield line[i_prev:i].strip()
-        i_prev = i
-
-
-def obj_image_load(img_data, context_imagepath_map, line, DIR, recursive, relpath):
-    """
-    Mainly uses comprehensiveImageLoad
-    But we try all space-separated items from current line when file is not found with last one
-    (users keep generating/using image files with spaces in a format that does not support them, sigh...)
-    Also tries to replace '_' with ' ' for Max's exporter replaces spaces with underscores.
-    Also handle " chars (some software use those to protect filenames with spaces, see T67266... sic).
-    Also corrects img_data (in case filenames with spaces have been split up in multiple entries, see T72148).
-    """
-    filepath_parts = line.split(b' ')
-
-    start = line.find(b'"') + 1
-    if start != 0:
-        end = line.find(b'"', start)
-        if end != 0:
-            filepath_parts = (line[start:end],)
-
-    image = None
-    for i in range(-1, -len(filepath_parts), -1):
-        imagepath = os.fsdecode(b" ".join(filepath_parts[i:]))
-        image = context_imagepath_map.get(imagepath, ...)
-        if image is ...:
-            image = load_image(imagepath, DIR, recursive=recursive, relpath=relpath)
-            if image is None and "_" in imagepath:
-                image = load_image(imagepath.replace("_", " "), DIR, recursive=recursive, relpath=relpath)
-            if image is not None:
-                context_imagepath_map[imagepath] = image
-                del img_data[i:]
-                img_data.append(imagepath)
-                break;
-        else:
-            del img_data[i:]
-            img_data.append(imagepath)
-            break;
-
-    if image is None:
-        imagepath = os.fsdecode(filepath_parts[-1])
-        image = load_image(imagepath, DIR, recursive=recursive, place_holder=True, relpath=relpath)
-        context_imagepath_map[imagepath] = image
-
-    return image
-
-
-def create_materials(filepath, relpath,
-                     material_libs, unique_materials,
-                     use_image_search, float_func):
-    """
-    Create all the used materials in this obj,
-    assign colors and images to the materials from all referenced material libs
-    """
-    from math import sqrt
-    from bpy_extras import node_shader_utils
-
-    DIR = os.path.dirname(filepath)
-    context_material_vars = set()
-
-    # Don't load the same image multiple times
-    context_imagepath_map = {}
-
-    nodal_material_wrap_map = {}
-
-    def load_material_image(blender_material, mat_wrap, context_material_name, img_data, line, type):
-        """
-        Set textures defined in .mtl file.
-        """
-        map_options = {}
-
-        # Absolute path - c:\.. etc would work here
-        image = obj_image_load(img_data, context_imagepath_map, line, DIR, use_image_search, relpath)
-
-        curr_token = []
-        for token in img_data[:-1]:
-            if token.startswith(b'-') and token[1:].isalpha():
-                if curr_token:
-                    map_options[curr_token[0]] = curr_token[1:]
-                curr_token[:] = []
-            curr_token.append(token)
-        if curr_token:
-            map_options[curr_token[0]] = curr_token[1:]
-
-        map_offset = map_options.get(b'-o')
-        map_scale = map_options.get(b'-s')
-        if map_offset is not None:
-            map_offset = tuple(map(float_func, map_offset))
-        if map_scale is not None:
-            map_scale = tuple(map(float_func, map_scale))
-
-        def _generic_tex_set(nodetex, image, texcoords, translation, scale):
-            nodetex.image = image
-            nodetex.texcoords = texcoords
-            if translation is not None:
-                nodetex.translation = translation
-            if scale is not None:
-                nodetex.scale = scale
-
-        # Adds textures for materials (rendering)
-        if type == 'Kd':
-            _generic_tex_set(mat_wrap.base_color_texture, image, 'UV', map_offset, map_scale)
-
-        elif type == 'Ka':
-            # XXX Not supported?
-            print("WARNING, currently unsupported ambient texture, skipped.")
-
-        elif type == 'Ks':
-            _generic_tex_set(mat_wrap.specular_texture, image, 'UV', map_offset, map_scale)
-
-        elif type == 'Ke':
-            _generic_tex_set(mat_wrap.emission_color_texture, image, 'UV', map_offset, map_scale)
-            mat_wrap.emission_strength = 1.0
-
-        elif type == 'Bump':
-            bump_mult = map_options.get(b'-bm')
-            bump_mult = float(bump_mult[0]) if (bump_mult and len(bump_mult[0]) > 1) else 1.0
-            mat_wrap.normalmap_strength_set(bump_mult)
-
-            _generic_tex_set(mat_wrap.normalmap_texture, image, 'UV', map_offset, map_scale)
-
-        elif type == 'D':
-            _generic_tex_set(mat_wrap.alpha_texture, image, 'UV', map_offset, map_scale)
-
-        elif type == 'disp':
-            # XXX Not supported?
-            print("WARNING, currently unsupported displacement texture, skipped.")
-            # ~ mat_wrap.bump_image_set(image)
-            # ~ mat_wrap.bump_mapping_set(coords='UV', translation=map_offset, scale=map_scale)
-
-        elif type == 'refl':
-            map_type = map_options.get(b'-type')
-            if map_type and map_type != [b'sphere']:
-                print("WARNING, unsupported reflection type '%s', defaulting to 'sphere'"
-                      "" % ' '.join(i.decode() for i in map_type))
-
-            _generic_tex_set(mat_wrap.base_color_texture, image, 'Reflection', map_offset, map_scale)
-            mat_wrap.base_color_texture.projection = 'SPHERE'
-
-        else:
-            raise Exception("invalid type %r" % type)
-
-    def finalize_material(context_material, context_material_vars, spec_colors,
-                          do_highlight, do_reflection, do_transparency, do_glass):
-        # Finalize previous mat, if any.
-        if context_material:
-            if "specular" in context_material_vars:
-                # XXX This is highly approximated, not sure whether we can do better...
-                # TODO: Find a way to guesstimate best value from diffuse color...
-                # IDEA: Use standard deviation of both spec and diff colors (i.e. how far away they are
-                #       from some grey), and apply the the proportion between those two as tint factor?
-                spec = sum(spec_colors) / 3.0
-                # ~ spec_var = math.sqrt(sum((c - spec) ** 2 for c in spec_color) / 3.0)
-                # ~ diff = sum(context_mat_wrap.base_color) / 3.0
-                # ~ diff_var = math.sqrt(sum((c - diff) ** 2 for c in context_mat_wrap.base_color) / 3.0)
-                # ~ tint = min(1.0, spec_var / diff_var)
-                context_mat_wrap.specular = spec
-                context_mat_wrap.specular_tint = 0.0
-                if "roughness" not in context_material_vars:
-                    context_mat_wrap.roughness = 0.0
-
-            # FIXME, how else to use this?
-            if do_highlight:
-                if "specular" not in context_material_vars:
-                    context_mat_wrap.specular = 1.0
-                if "roughness" not in context_material_vars:
-                    context_mat_wrap.roughness = 0.0
-            else:
-                if "specular" not in context_material_vars:
-                    context_mat_wrap.specular = 0.0
-                if "roughness" not in context_material_vars:
-                    context_mat_wrap.roughness = 1.0
-
-            if do_reflection:
-                if "metallic" not in context_material_vars:
-                    context_mat_wrap.metallic = 1.0
-            else:
-                # since we are (ab)using ambient term for metallic (which can be non-zero)
-                context_mat_wrap.metallic = 0.0
-
-            if do_transparency:
-                if "ior" not in context_material_vars:
-                    context_mat_wrap.ior = 1.0
-                if "alpha" not in context_material_vars:
-                    context_mat_wrap.alpha = 1.0
-                # EEVEE only
-                context_material.blend_method = 'BLEND'
-
-            if do_glass:
-                if "ior" not in context_material_vars:
-                    context_mat_wrap.ior = 1.5
-
-    # Try to find a MTL with the same name as the OBJ if no MTLs are specified.
-    temp_mtl = os.path.splitext((os.path.basename(filepath)))[0] + ".mtl"
-    if os.path.exists(os.path.join(DIR, temp_mtl)):
-        material_libs.add(temp_mtl)
-    del temp_mtl
-
-    # Create new materials
-    for name in unique_materials:  # .keys()
-        ma_name = "Default OBJ" if name is None else name.decode('utf-8', "replace")
-        ma = unique_materials[name] = bpy.data.materials.new(ma_name)
-        ma_wrap = node_shader_utils.PrincipledBSDFWrapper(ma, is_readonly=False)
-        nodal_material_wrap_map[ma] = ma_wrap
-        ma_wrap.use_nodes = True
-
-    for libname in sorted(material_libs):
-        # print(libname)
-        mtlpath = os.path.join(DIR, libname)
-        if not os.path.exists(mtlpath):
-            print("\tMaterial not found MTL: %r" % mtlpath)
-        else:
-            # Note: with modern Principled BSDF shader, things like ambient, raytrace or fresnel are always 'ON'
-            # (i.e. automatically controlled by other parameters).
-            do_highlight = False
-            do_reflection = False
-            do_transparency = False
-            do_glass = False
-            spec_colors = [0.0, 0.0, 0.0]
-
-            # print('\t\tloading mtl: %e' % mtlpath)
-            context_material = None
-            context_mat_wrap = None
-            mtl = open(mtlpath, 'rb')
-            for line in mtl:  # .readlines():
-                line = line.strip()
-                if not line or line.startswith(b'#'):
-                    continue
-
-                line_split = line.split()
-                line_id = line_split[0].lower()
-
-                if line_id == b'newmtl':
-                    # Finalize previous mat, if any.
-                    finalize_material(context_material, context_material_vars, spec_colors,
-                                      do_highlight, do_reflection, do_transparency, do_glass)
-
-                    context_material_name = line_value(line_split)
-                    context_material = unique_materials.get(context_material_name)
-                    if context_material is not None:
-                        context_mat_wrap = nodal_material_wrap_map[context_material]
-                    context_material_vars.clear()
-
-                    spec_colors[:] = [0.0, 0.0, 0.0]
-                    do_highlight = False
-                    do_reflection = False
-                    do_transparency = False
-                    do_glass = False
-
-
-                elif context_material:
-                    def _get_colors(line_split):
-                        # OBJ 'allows' one or two components values, treat single component as greyscale, and two as blue = 0.0.
-                        ln = len(line_split)
-                        if ln == 2:
-                            return [float_func(line_split[1])] * 3
-                        elif ln == 3:
-                            return [float_func(line_split[1]), float_func(line_split[2]), 0.0]
-                        else:
-                            return [float_func(line_split[1]), float_func(line_split[2]), float_func(line_split[3])]
-
-                    # we need to make a material to assign properties to it.
-                    if line_id == b'ka':
-                        refl =  sum(_get_colors(line_split)) / 3.0
-                        context_mat_wrap.metallic = refl
-                        context_material_vars.add("metallic")
-                    elif line_id == b'kd':
-                        context_mat_wrap.base_color = _get_colors(line_split)
-                    elif line_id == b'ks':
-                        spec_colors[:] = _get_colors(line_split)
-                        context_material_vars.add("specular")
-                    elif line_id == b'ke':
-                        # We cannot set context_material.emit right now, we need final diffuse color as well for this.
-                        # XXX Unsupported currently
-                        context_mat_wrap.emission_color = _get_colors(line_split)
-                        context_mat_wrap.emission_strength = 1.0
-                    elif line_id == b'ns':
-                        # XXX Totally empirical conversion, trying to adapt it
-                        #     (from 0.0 - 1000.0 OBJ specular exponent range to 1.0 - 0.0 Principled BSDF range)...
-                        val = max(0.0, min(1000.0, float_func(line_split[1])))
-                        context_mat_wrap.roughness = 1.0 - (sqrt(val / 1000))
-                        context_material_vars.add("roughness")
-                    elif line_id == b'ni':  # Refraction index (between 0.001 and 10).
-                        context_mat_wrap.ior = float_func(line_split[1])
-                        context_material_vars.add("ior")
-                    elif line_id == b'd':  # dissolve (transparency)
-                        context_mat_wrap.alpha = float_func(line_split[1])
-                        context_material_vars.add("alpha")
-                    elif line_id == b'tr':  # translucency
-                        print("WARNING, currently unsupported 'tr' translucency option, skipped.")
-                    elif line_id == b'tf':
-                        # rgb, filter color, blender has no support for this.
-                        print("WARNING, currently unsupported 'tf' filter color option, skipped.")
-                    elif line_id == b'illum':
-                        # Some MTL files incorrectly use a float for this value, see T60135.
-                        illum = any_number_as_int(line_split[1])
-
-                        # inline comments are from the spec, v4.2
-                        if illum == 0:
-                            # Color on and Ambient off
-                            print("WARNING, Principled BSDF shader does not support illumination 0 mode "
-                                  "(colors with no ambient), skipped.")
-                        elif illum == 1:
-                            # Color on and Ambient on
-                            pass
-                        elif illum == 2:
-                            # Highlight on
-                            do_highlight = True
-                        elif illum == 3:
-                            # Reflection on and Ray trace on
-                            do_reflection = True
-                        elif illum == 4:
-                            # Transparency: Glass on
-                            # Reflection: Ray trace on
-                            do_transparency = True
-                            do_reflection = True
-                            do_glass = True
-                        elif illum == 5:
-                            # Reflection: Fresnel on and Ray trace on
-                            do_reflection = True
-                        elif illum == 6:
-                            # Transparency: Refraction on
-                            # Reflection: Fresnel off and Ray trace on
-                            do_transparency = True
-                            do_reflection = True
-                        elif illum == 7:
-                            # Transparency: Refraction on
-                            # Reflection: Fresnel on and Ray trace on
-                            do_transparency = True
-                            do_reflection = True
-                        elif illum == 8:
-                            # Reflection on and Ray trace off
-                            do_reflection = True
-                        elif illum == 9:
-                            # Transparency: Glass on
-                            # Reflection: Ray trace off
-                            do_transparency = True
-                            do_reflection = False
-                            do_glass = True
-                        elif illum == 10:
-                            # Casts shadows onto invisible surfaces
-                            print("WARNING, Principled BSDF shader does not support illumination 10 mode "
-                                  "(cast shadows on invisible surfaces), skipped.")
-                            pass
-
-                    elif line_id == b'map_ka':
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'Ka')
-                    elif line_id == b'map_ks':
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'Ks')
-                    elif line_id == b'map_kd':
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'Kd')
-                    elif line_id == b'map_ke':
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'Ke')
-                    elif line_id in {b'map_bump', b'bump'}:  # 'bump' is incorrect but some files use it.
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'Bump')
-                    elif line_id in {b'map_d', b'map_tr'}:  # Alpha map - Dissolve
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'D')
-
-                    elif line_id in {b'map_disp', b'disp'}:  # displacementmap
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'disp')
-
-                    elif line_id in {b'map_refl', b'refl'}:  # reflectionmap
-                        img_data = line.split()[1:]
-                        if img_data:
-                            load_material_image(context_material, context_mat_wrap,
-                                                context_material_name, img_data, line, 'refl')
-                    else:
-                        print("WARNING: %r:%r (ignored)" % (filepath, line))
-
-            # Finalize last mat, if any.
-            finalize_material(context_material, context_material_vars, spec_colors,
-                              do_highlight, do_reflection, do_transparency, do_glass)
-            mtl.close()
-
-
-def face_is_edge(face):
-    """Simple check to test whether given (temp, working) data is an edge, and not a real face."""
-    face_vert_loc_indices = face[0]
-    face_vert_nor_indices = face[1]
-    return len(face_vert_nor_indices) == 1 or len(face_vert_loc_indices) == 2
-
-
-def split_mesh(verts_loc, faces, unique_materials, filepath, SPLIT_OB_OR_GROUP):
-    """
-    Takes vert_loc and faces, and separates into multiple sets of
-    (verts_loc, faces, unique_materials, dataname)
-    """
-
-    filename = os.path.splitext((os.path.basename(filepath)))[0]
-
-    if not SPLIT_OB_OR_GROUP or not faces:
-        use_verts_nor = any(f[1] for f in faces)
-        use_verts_tex = any(f[2] for f in faces)
-        # use the filename for the object name since we aren't chopping up the mesh.
-        return [(verts_loc, faces, unique_materials, filename, use_verts_nor, use_verts_tex)]
-
-    def key_to_name(key):
-        # if the key is a tuple, join it to make a string
-        if not key:
-            return filename  # assume its a string. make sure this is true if the splitting code is changed
-        elif isinstance(key, bytes):
-            return key.decode('utf-8', 'replace')
-        else:
-            return "_".join(k.decode('utf-8', 'replace') for k in key)
-
-    # Return a key that makes the faces unique.
-    face_split_dict = {}
-
-    oldkey = -1  # initialize to a value that will never match the key
-
-    for face in faces:
-        (face_vert_loc_indices,
-         face_vert_nor_indices,
-         face_vert_tex_indices,
-         context_material,
-         _context_smooth_group,
-         context_object_key,
-         _face_invalid_blenpoly,
-         ) = face
-        key = context_object_key
-
-        if oldkey != key:
-            # Check the key has changed.
-            (verts_split, faces_split, unique_materials_split, vert_remap,
-             use_verts_nor, use_verts_tex) = face_split_dict.setdefault(key, ([], [], {}, {}, [], []))
-            oldkey = key
-
-        if not face_is_edge(face):
-            if not use_verts_nor and face_vert_nor_indices:
-                use_verts_nor.append(True)
-
-            if not use_verts_tex and face_vert_tex_indices:
-                use_verts_tex.append(True)
-
-        # Remap verts to new vert list and add where needed
-        for loop_idx, vert_idx in enumerate(face_vert_loc_indices):
-            map_index = vert_remap.get(vert_idx)
-            if map_index is None:
-                map_index = len(verts_split)
-                vert_remap[vert_idx] = map_index  # set the new remapped index so we only add once and can reference next time.
-                verts_split.append(verts_loc[vert_idx])  # add the vert to the local verts
-
-            face_vert_loc_indices[loop_idx] = map_index  # remap to the local index
-
-            if context_material not in unique_materials_split:
-                unique_materials_split[context_material] = unique_materials[context_material]
-
-        faces_split.append(face)
-
-    # remove one of the items and reorder
-    return [(verts_split, faces_split, unique_materials_split, key_to_name(key), bool(use_vnor), bool(use_vtex))
-            for key, (verts_split, faces_split, unique_materials_split, _, use_vnor, use_vtex)
-            in face_split_dict.items()]
-
-
-def create_mesh(new_objects,
-                use_edges,
-                verts_loc,
-                verts_nor,
-                verts_tex,
-                faces,
-                unique_materials,
-                unique_smooth_groups,
-                vertex_groups,
-                dataname,
-                ):
-    """
-    Takes all the data gathered and generates a mesh, adding the new object to new_objects
-    deals with ngons, sharp edges and assigning materials
-    """
-
-    if unique_smooth_groups:
-        sharp_edges = set()
-        smooth_group_users = {context_smooth_group: {} for context_smooth_group in unique_smooth_groups.keys()}
-        context_smooth_group_old = -1
-
-    fgon_edges = set()  # Used for storing fgon keys when we need to tessellate/untessellate them (ngons with hole).
-    edges = []
-    tot_loops = 0
-
-    context_object_key = None
-
-    # reverse loop through face indices
-    for f_idx in range(len(faces) - 1, -1, -1):
-        face = faces[f_idx]
-
-        (face_vert_loc_indices,
-         face_vert_nor_indices,
-         face_vert_tex_indices,
-         context_material,
-         context_smooth_group,
-         context_object_key,
-         face_invalid_blenpoly,
-         ) = face
-
-        len_face_vert_loc_indices = len(face_vert_loc_indices)
-
-        if len_face_vert_loc_indices == 1:
-            faces.pop(f_idx)  # cant add single vert faces
-
-        # Face with a single item in face_vert_nor_indices is actually a polyline!
-        elif face_is_edge(face):
-            if use_edges:
-                edges.extend((face_vert_loc_indices[i], face_vert_loc_indices[i + 1])
-                             for i in range(len_face_vert_loc_indices - 1))
-            faces.pop(f_idx)
-
-        else:
-            # Smooth Group
-            if unique_smooth_groups and context_smooth_group:
-                # Is a part of of a smooth group and is a face
-                if context_smooth_group_old is not context_smooth_group:
-                    edge_dict = smooth_group_users[context_smooth_group]
-                    context_smooth_group_old = context_smooth_group
-
-                prev_vidx = face_vert_loc_indices[-1]
-                for vidx in face_vert_loc_indices:
-                    edge_key = (prev_vidx, vidx) if (prev_vidx < vidx) else (vidx, prev_vidx)
-                    prev_vidx = vidx
-                    edge_dict[edge_key] = edge_dict.get(edge_key, 0) + 1
-
-            # NGons into triangles
-            if face_invalid_blenpoly:
-                # ignore triangles with invalid indices
-                if len(face_vert_loc_indices) > 3:
-                    from bpy_extras.mesh_utils import ngon_tessellate
-                    ngon_face_indices = ngon_tessellate(verts_loc, face_vert_loc_indices, debug_print=bpy.app.debug)
-                    faces.extend([([face_vert_loc_indices[ngon[0]],
-                                    face_vert_loc_indices[ngon[1]],
-                                    face_vert_loc_indices[ngon[2]],
-                                    ],
-                                [face_vert_nor_indices[ngon[0]],
-                                    face_vert_nor_indices[ngon[1]],
-                                    face_vert_nor_indices[ngon[2]],
-                                    ] if face_vert_nor_indices else [],
-                                [face_vert_tex_indices[ngon[0]],
-                                    face_vert_tex_indices[ngon[1]],
-                                    face_vert_tex_indices[ngon[2]],
-                                    ] if face_vert_tex_indices else [],
-                                context_material,
-                                context_smooth_group,
-                                context_object_key,
-                                [],
-                                )
-                                for ngon in ngon_face_indices]
-                                )
-                    tot_loops += 3 * len(ngon_face_indices)
-
-                    # edges to make ngons
-                    if len(ngon_face_indices) > 1:
-                        edge_users = set()
-                        for ngon in ngon_face_indices:
-                            prev_vidx = face_vert_loc_indices[ngon[-1]]
-                            for ngidx in ngon:
-                                vidx = face_vert_loc_indices[ngidx]
-                                if vidx == prev_vidx:
-                                    continue  # broken OBJ... Just skip.
-                                edge_key = (prev_vidx, vidx) if (prev_vidx < vidx) else (vidx, prev_vidx)
-                                prev_vidx = vidx
-                                if edge_key in edge_users:
-                                    fgon_edges.add(edge_key)
-                                else:
-                                    edge_users.add(edge_key)
-
-                faces.pop(f_idx)
-            else:
-                tot_loops += len_face_vert_loc_indices
-
-    # Build sharp edges
-    if unique_smooth_groups:
-        for edge_dict in smooth_group_users.values():
-            for key, users in edge_dict.items():
-                if users == 1:  # This edge is on the boundary of a group
-                    sharp_edges.add(key)
-
-    # map the material names to an index
-    material_mapping = {name: i for i, name in enumerate(unique_materials)}  # enumerate over unique_materials keys()
-
-    materials = [None] * len(unique_materials)
-
-    for name, index in material_mapping.items():
-        materials[index] = unique_materials[name]
-
-    me = bpy.data.meshes.new(dataname)
-
-    # make sure the list isn't too big
-    for material in materials:
-        me.materials.append(material)
-
-    me.vertices.add(len(verts_loc))
-    me.loops.add(tot_loops)
-    me.polygons.add(len(faces))
-
-    # verts_loc is a list of (x, y, z) tuples
-    me.vertices.foreach_set("co", unpack_list(verts_loc))
-
-    loops_vert_idx = tuple(vidx for (face_vert_loc_indices, _, _, _, _, _, _) in faces for vidx in face_vert_loc_indices)
-    faces_loop_start = []
-    lidx = 0
-    for f in faces:
-        face_vert_loc_indices = f[0]
-        nbr_vidx = len(face_vert_loc_indices)
-        faces_loop_start.append(lidx)
-        lidx += nbr_vidx
-    faces_loop_total = tuple(len(face_vert_loc_indices) for (face_vert_loc_indices, _, _, _, _, _, _) in faces)
-
-    me.loops.foreach_set("vertex_index", loops_vert_idx)
-    me.polygons.foreach_set("loop_start", faces_loop_start)
-    me.polygons.foreach_set("loop_total", faces_loop_total)
-
-    faces_ma_index = tuple(material_mapping[context_material] for (_, _, _, context_material, _, _, _) in faces)
-    me.polygons.foreach_set("material_index", faces_ma_index)
-
-    faces_use_smooth = tuple(bool(context_smooth_group) for (_, _, _, _, context_smooth_group, _, _) in faces)
-    me.polygons.foreach_set("use_smooth", faces_use_smooth)
-
-    if verts_nor and me.loops:
-        # Note: we store 'temp' normals in loops, since validate() may alter final mesh,
-        #       we can only set custom lnors *after* calling it.
-        me.create_normals_split()
-        loops_nor = tuple(no for (_, face_vert_nor_indices, _, _, _, _, _) in faces
-                             for face_noidx in face_vert_nor_indices
-                             for no in verts_nor[face_noidx])
-        me.loops.foreach_set("normal", loops_nor)
-
-    if verts_tex and me.polygons:
-        # Some files Do not explicitly write the 'v' value when it's 0.0, see T68249...
-        verts_tex = [uv if len(uv) == 2 else uv + [0.0] for uv in verts_tex]
-        me.uv_layers.new(do_init=False)
-        loops_uv = tuple(uv for (_, _, face_vert_tex_indices, _, _, _, _) in faces
-                            for face_uvidx in face_vert_tex_indices
-                            for uv in verts_tex[face_uvidx])
-        me.uv_layers[0].data.foreach_set("uv", loops_uv)
-
-    use_edges = use_edges and bool(edges)
-    if use_edges:
-        me.edges.add(len(edges))
-        # edges should be a list of (a, b) tuples
-        me.edges.foreach_set("vertices", unpack_list(edges))
-
-    me.validate(clean_customdata=False)  # *Very* important to not remove lnors here!
-    me.update(calc_edges=use_edges, calc_edges_loose=use_edges)
-
-    # Un-tessellate as much as possible, in case we had to triangulate some ngons...
-    if fgon_edges:
-        import bmesh
-        bm = bmesh.new()
-        bm.from_mesh(me)
-        verts = bm.verts[:]
-        get = bm.edges.get
-        edges = [get((verts[vidx1], verts[vidx2])) for vidx1, vidx2 in fgon_edges]
-        try:
-            bmesh.ops.dissolve_edges(bm, edges=edges, use_verts=False)
-        except:
-            # Possible dissolve fails for some edges, but don't fail silently in case this is a real bug.
-            import traceback
-            traceback.print_exc()
-
-        bm.to_mesh(me)
-        bm.free()
-
-    # XXX If validate changes the geometry, this is likely to be broken...
-    if unique_smooth_groups and sharp_edges:
-        for e in me.edges:
-            if e.key in sharp_edges:
-                e.use_edge_sharp = True
-
-    if verts_nor:
-        clnors = array.array('f', [0.0] * (len(me.loops) * 3))
-        me.loops.foreach_get("normal", clnors)
-
-        if not unique_smooth_groups:
-            me.polygons.foreach_set("use_smooth", [True] * len(me.polygons))
-
-        me.normals_split_custom_set(tuple(zip(*(iter(clnors),) * 3)))
-        me.use_auto_smooth = True
-
-    ob = bpy.data.objects.new(me.name, me)
-    new_objects.append(ob)
-
-    # Create the vertex groups. No need to have the flag passed here since we test for the
-    # content of the vertex_groups. If the user selects to NOT have vertex groups saved then
-    # the following test will never run
-    for group_name, group_indices in vertex_groups.items():
-        group = ob.vertex_groups.new(name=group_name.decode('utf-8', "replace"))
-        group.add(group_indices, 1.0, 'REPLACE')
-
-
-def create_nurbs(context_nurbs, vert_loc, new_objects):
-    """
-    Add nurbs object to blender, only support one type at the moment
-    """
-    deg = context_nurbs.get(b'deg', (3,))
-    curv_range = context_nurbs.get(b'curv_range')
-    curv_idx = context_nurbs.get(b'curv_idx', [])
-    parm_u = context_nurbs.get(b'parm_u', [])
-    parm_v = context_nurbs.get(b'parm_v', [])
-    name = context_nurbs.get(b'name', b'ObjNurb')
-    cstype = context_nurbs.get(b'cstype')
-
-    if cstype is None:
-        print('\tWarning, cstype not found')
-        return
-    if cstype != b'bspline':
-        print('\tWarning, cstype is not supported (only bspline)')
-        return
-    if not curv_idx:
-        print('\tWarning, curv argument empty or not set')
-        return
-    if len(deg) > 1 or parm_v:
-        print('\tWarning, surfaces not supported')
-        return
-
-    cu = bpy.data.curves.new(name.decode('utf-8', "replace"), 'CURVE')
-    cu.dimensions = '3D'
-
-    nu = cu.splines.new('NURBS')
-    nu.points.add(len(curv_idx) - 1)  # a point is added to start with
-    nu.points.foreach_set("co", [co_axis for vt_idx in curv_idx for co_axis in (vert_loc[vt_idx] + [1.0])])
-
-    nu.order_u = deg[0] + 1
-
-    # get for endpoint flag from the weighting
-    if curv_range and len(parm_u) > deg[0] + 1:
-        do_endpoints = True
-        for i in range(deg[0] + 1):
-
-            if abs(parm_u[i] - curv_range[0]) > 0.0001:
-                do_endpoints = False
-                break
-
-            if abs(parm_u[-(i + 1)] - curv_range[1]) > 0.0001:
-                do_endpoints = False
-                break
-
-    else:
-        do_endpoints = False
-
-    if do_endpoints:
-        nu.use_endpoint_u = True
-
-    # close
-    '''
-    do_closed = False
-    if len(parm_u) > deg[0]+1:
-        for i in xrange(deg[0]+1):
-            #print curv_idx[i], curv_idx[-(i+1)]
-
-            if curv_idx[i]==curv_idx[-(i+1)]:
-                do_closed = True
-                break
-
-    if do_closed:
-        nu.use_cyclic_u = True
-    '''
-
-    ob = bpy.data.objects.new(name.decode('utf-8', "replace"), cu)
-
-    new_objects.append(ob)
-
-
-def strip_slash(line_split):
-    if line_split[-1][-1] == 92:  # '\' char
-        if len(line_split[-1]) == 1:
-            line_split.pop()  # remove the \ item
-        else:
-            line_split[-1] = line_split[-1][:-1]  # remove the \ from the end last number
-        return True
-    return False
-
-
-def get_float_func(filepath):
-    """
-    find the float function for this obj file
-    - whether to replace commas or not
-    """
-    file = open(filepath, 'rb')
-    for line in file:  # .readlines():
-        line = line.lstrip()
-        if line.startswith(b'v'):  # vn vt v
-            if b',' in line:
-                file.close()
-                return lambda f: float(f.replace(b',', b'.'))
-            elif b'.' in line:
-                file.close()
-                return float
-
-    file.close()
-    # in case all vert values were ints
-    return float
-
-
-def any_number_as_int(svalue):
-    if b',' in svalue:
-        svalue = svalue.replace(b',', b'.')
-    return int(float(svalue))
-
-
-def load(context,
-         filepath,
-         *,
-         global_clamp_size=0.0,
-         use_smooth_groups=True,
-         use_edges=True,
-         use_split_objects=True,
-         use_split_groups=False,
-         use_image_search=True,
-         use_groups_as_vgroups=False,
-         relpath=None,
-         global_matrix=None
-         ):
-    """
-    Called by the user interface or another script.
-    load_obj(path) - should give acceptable results.
-    This function passes the file and sends the data off
-        to be split into objects and then converted into mesh objects
-    """
-    def unique_name(existing_names, name_orig):
-        i = 0
-        if name_orig is None:
-            name_orig = b"ObjObject"
-        name = name_orig
-        while name in existing_names:
-            name = b"%s.%03d" % (name_orig, i)
-            i += 1
-        existing_names.add(name)
-        return name
-
-    def handle_vec(line_start, context_multi_line, line_split, tag, data, vec, vec_len):
-        ret_context_multi_line = tag if strip_slash(line_split) else b''
-        if line_start == tag:
-            vec[:] = [float_func(v) for v in line_split[1:]]
-        elif context_multi_line == tag:
-            vec += [float_func(v) for v in line_split]
-        if not ret_context_multi_line:
-            data.append(tuple(vec[:vec_len]))
-        return ret_context_multi_line
-
-    def create_face(context_material, context_smooth_group, context_object_key):
-        face_vert_loc_indices = []
-        face_vert_nor_indices = []
-        face_vert_tex_indices = []
-        return (
-            face_vert_loc_indices,
-            face_vert_nor_indices,
-            face_vert_tex_indices,
-            context_material,
-            context_smooth_group,
-            context_object_key,
-            [],  # If non-empty, that face is a Blender-invalid ngon (holes...), need a mutable object for that...
-        )
-
-    with ProgressReport(context.window_manager) as progress:
-        progress.enter_substeps(1, "Importing OBJ %r..." % filepath)
-
-        if global_matrix is None:
-            global_matrix = mathutils.Matrix()
-
-        if use_split_objects or use_split_groups:
-            use_groups_as_vgroups = False
-
-        verts_loc = []
-        verts_nor = []
-        verts_tex = []
-        faces = []  # tuples of the faces
-        material_libs = set()  # filenames to material libs this OBJ uses
-        vertex_groups = {}  # when use_groups_as_vgroups is true
-
-        # Get the string to float conversion func for this file- is 'float' for almost all files.
-        float_func = get_float_func(filepath)
-
-        # Context variables
-        context_material = None
-        context_smooth_group = None
-        context_object_key = None
-        context_object_obpart = None
-        context_vgroup = None
-
-        objects_names = set()
-
-        # Nurbs
-        context_nurbs = {}
-        nurbs = []
-        context_parm = b''  # used by nurbs too but could be used elsewhere
-
-        # Until we can use sets
-        use_default_material = False
-        unique_materials = {}
-        unique_smooth_groups = {}
-        # unique_obects= {} - no use for this variable since the objects are stored in the face.
-
-        # when there are faces that end with \
-        # it means they are multiline-
-        # since we use xreadline we cant skip to the next line
-        # so we need to know whether
-        context_multi_line = b''
-
-        # Per-face handling data.
-        face_vert_loc_indices = None
-        face_vert_nor_indices = None
-        face_vert_tex_indices = None
-        verts_loc_len = verts_nor_len = verts_tex_len = 0
-        face_items_usage = set()
-        face_invalid_blenpoly = None
-        prev_vidx = None
-        face = None
-        vec = []
-
-        quick_vert_failures = 0
-        skip_quick_vert = False
-
-        progress.enter_substeps(3, "Parsing OBJ file...")
-        with open(filepath, 'rb') as f:
-            for line in f:
-                line_split = line.split()
-
-                if not line_split:
-                    continue
-
-                line_start = line_split[0]  # we compare with this a _lot_
-
-                if len(line_split) == 1 and not context_multi_line and line_start != b'end':
-                    print("WARNING, skipping malformatted line: %s" % line.decode('UTF-8', 'replace').rstrip())
-                    continue
-
-                # Handling vertex data are pretty similar, factorize that.
-                # Also, most OBJ files store all those on a single line, so try fast parsing for that first,
-                # and only fallback to full multi-line parsing when needed, this gives significant speed-up
-                # (~40% on affected code).
-                if line_start == b'v':
-                    vdata, vdata_len, do_quick_vert = verts_loc, 3, not skip_quick_vert
-                elif line_start == b'vn':
-                    vdata, vdata_len, do_quick_vert = verts_nor, 3, not skip_quick_vert
-                elif line_start == b'vt':
-                    vdata, vdata_len, do_quick_vert = verts_tex, 2, not skip_quick_vert
-                elif context_multi_line == b'v':
-                    vdata, vdata_len, do_quick_vert = verts_loc, 3, False
-                elif context_multi_line == b'vn':
-                    vdata, vdata_len, do_quick_vert = verts_nor, 3, False
-                elif context_multi_line == b'vt':
-                    vdata, vdata_len, do_quick_vert = verts_tex, 2, False
-                else:
-                    vdata_len = 0
-
-                if vdata_len:
-                    if do_quick_vert:
-                        try:
-                            vdata.append(list(map(float_func, line_split[1:vdata_len + 1])))
-                        except:
-                            do_quick_vert = False
-                            # In case we get too many failures on quick parsing, force fallback to full multi-line one.
-                            # Exception handling can become costly...
-                            quick_vert_failures += 1
-                            if quick_vert_failures > 10000:
-                                skip_quick_vert = True
-                    if not do_quick_vert:
-                        context_multi_line = handle_vec(line_start, context_multi_line, line_split,
-                                                        context_multi_line or line_start,
-                                                        vdata, vec, vdata_len)
-
-                elif line_start == b'f' or context_multi_line == b'f':
-                    if not context_multi_line:
-                        line_split = line_split[1:]
-                        # Instantiate a face
-                        face = create_face(context_material, context_smooth_group, context_object_key)
-                        (face_vert_loc_indices, face_vert_nor_indices, face_vert_tex_indices,
-                         _1, _2, _3, face_invalid_blenpoly) = face
-                        faces.append(face)
-                        face_items_usage.clear()
-                        verts_loc_len = len(verts_loc)
-                        verts_nor_len = len(verts_nor)
-                        verts_tex_len = len(verts_tex)
-                        if context_material is None:
-                            use_default_material = True
-                    # Else, use face_vert_loc_indices and face_vert_tex_indices previously defined and used the obj_face
-
-                    context_multi_line = b'f' if strip_slash(line_split) else b''
-
-                    for v in line_split:
-                        obj_vert = v.split(b'/')
-                        idx = int(obj_vert[0])  # Note that we assume here we cannot get OBJ invalid 0 index...
-                        vert_loc_index = (idx + verts_loc_len) if (idx < 1) else idx - 1
-                        # Add the vertex to the current group
-                        # *warning*, this wont work for files that have groups defined around verts
-                        if use_groups_as_vgroups and context_vgroup:
-                            vertex_groups[context_vgroup].append(vert_loc_index)
-                        # This a first round to quick-detect ngons that *may* use a same edge more than once.
-                        # Potential candidate will be re-checked once we have done parsing the whole face.
-                        if not face_invalid_blenpoly:
-                            # If we use more than once a same vertex, invalid ngon is suspected.
-                            if vert_loc_index in face_items_usage:
-                                face_invalid_blenpoly.append(True)
-                            else:
-                                face_items_usage.add(vert_loc_index)
-                        face_vert_loc_indices.append(vert_loc_index)
-
-                        # formatting for faces with normals and textures is
-                        # loc_index/tex_index/nor_index
-                        if len(obj_vert) > 1 and obj_vert[1] and obj_vert[1] != b'0':
-                            idx = int(obj_vert[1])
-                            face_vert_tex_indices.append((idx + verts_tex_len) if (idx < 1) else idx - 1)
-                        else:
-                            face_vert_tex_indices.append(0)
-
-                        if len(obj_vert) > 2 and obj_vert[2] and obj_vert[2] != b'0':
-                            idx = int(obj_vert[2])
-                            face_vert_nor_indices.append((idx + verts_nor_len) if (idx < 1) else idx - 1)
-                        else:
-                            face_vert_nor_indices.append(0)
-
-                    if not context_multi_line:
-                        # Means we have finished a face, we have to do final check if ngon is suspected to be blender-invalid...
-                        if face_invalid_blenpoly:
-                            face_invalid_blenpoly.clear()
-                            face_items_usage.clear()
-                            prev_vidx = face_vert_loc_indices[-1]
-                            for vidx in face_vert_loc_indices:
-                                edge_key = (prev_vidx, vidx) if (prev_vidx < vidx) else (vidx, prev_vidx)
-                                if edge_key in face_items_usage:
-                                    face_invalid_blenpoly.append(True)
-                                    break
-                                face_items_usage.add(edge_key)
-                                prev_vidx = vidx
-
-                elif use_edges and (line_start == b'l' or context_multi_line == b'l'):
-                    # very similar to the face load function above with some parts removed
-                    if not context_multi_line:
-                        line_split = line_split[1:]
-                        # Instantiate a face
-                        face = create_face(context_material, context_smooth_group, context_object_key)
-                        face_vert_loc_indices = face[0]
-                        # XXX A bit hackish, we use special 'value' of face_vert_nor_indices (a single True item) to tag this
-                        #     as a polyline, and not a regular face...
-                        face[1][:] = [True]
-                        faces.append(face)
-                        if context_material is None:
-                            use_default_material = True
-                    # Else, use face_vert_loc_indices previously defined and used the obj_face
-
-                    context_multi_line = b'l' if strip_slash(line_split) else b''
-
-                    for v in line_split:
-                        obj_vert = v.split(b'/')
-                        idx = int(obj_vert[0]) - 1
-                        face_vert_loc_indices.append((idx + len(verts_loc) + 1) if (idx < 0) else idx)
-
-                elif line_start == b's':
-                    if use_smooth_groups:
-                        context_smooth_group = line_value(line_split)
-                        if context_smooth_group == b'off':
-                            context_smooth_group = None
-                        elif context_smooth_group:  # is not None
-                            unique_smooth_groups[context_smooth_group] = None
-
-                elif line_start == b'o':
-                    if use_split_objects:
-                        context_object_key = unique_name(objects_names, line_value(line_split))
-                        context_object_obpart = context_object_key
-                        # unique_objects[context_object_key]= None
-
-                elif line_start == b'g':
-                    if use_split_groups:
-                        grppart = line_value(line_split)
-                        context_object_key = (context_object_obpart, grppart) if context_object_obpart else grppart
-                        # print 'context_object_key', context_object_key
-                        # unique_objects[context_object_key]= None
-                    elif use_groups_as_vgroups:
-                        context_vgroup = line_value(line.split())
-                        if context_vgroup and context_vgroup != b'(null)':
-                            vertex_groups.setdefault(context_vgroup, [])
-                        else:
-                            context_vgroup = None  # dont assign a vgroup
-
-                elif line_start == b'usemtl':
-                    context_material = line_value(line.split())
-                    unique_materials[context_material] = None
-                elif line_start == b'mtllib':  # usemap or usemat
-                    # can have multiple mtllib filenames per line, mtllib can appear more than once,
-                    # so make sure only occurrence of material exists
-                    material_libs |= {os.fsdecode(f) for f in filenames_group_by_ext(line.lstrip()[7:].strip(), b'.mtl')
-                    }
-
-                    # Nurbs support
-                elif line_start == b'cstype':
-                    context_nurbs[b'cstype'] = line_value(line.split())  # 'rat bspline' / 'bspline'
-                elif line_start == b'curv' or context_multi_line == b'curv':
-                    curv_idx = context_nurbs[b'curv_idx'] = context_nurbs.get(b'curv_idx', [])  # in case were multiline
-
-                    if not context_multi_line:
-                        context_nurbs[b'curv_range'] = float_func(line_split[1]), float_func(line_split[2])
-                        line_split[0:3] = []  # remove first 3 items
-
-                    if strip_slash(line_split):
-                        context_multi_line = b'curv'
-                    else:
-                        context_multi_line = b''
-
-                    for i in line_split:
-                        vert_loc_index = int(i) - 1
-
-                        if vert_loc_index < 0:
-                            vert_loc_index = len(verts_loc) + vert_loc_index + 1
-
-                        curv_idx.append(vert_loc_index)
-
-                elif line_start == b'parm' or context_multi_line == b'parm':
-                    if context_multi_line:
-                        context_multi_line = b''
-                    else:
-                        context_parm = line_split[1]
-                        line_split[0:2] = []  # remove first 2
-
-                    if strip_slash(line_split):
-                        context_multi_line = b'parm'
-                    else:
-                        context_multi_line = b''
-
-                    if context_parm.lower() == b'u':
-                        context_nurbs.setdefault(b'parm_u', []).extend([float_func(f) for f in line_split])
-                    elif context_parm.lower() == b'v':  # surfaces not supported yet
-                        context_nurbs.setdefault(b'parm_v', []).extend([float_func(f) for f in line_split])
-                    # else: # may want to support other parm's ?
-
-                elif line_start == b'deg':
-                    context_nurbs[b'deg'] = [int(i) for i in line.split()[1:]]
-                elif line_start == b'end':
-                    # Add the nurbs curve
-                    if context_object_key:
-                        context_nurbs[b'name'] = context_object_key
-                    nurbs.append(context_nurbs)
-                    context_nurbs = {}
-                    context_parm = b''
-
-                ''' # How to use usemap? deprecated?
-                elif line_start == b'usema': # usemap or usemat
-                    context_image= line_value(line_split)
-                '''
-
-        progress.step("Done, loading materials and images...")
-
-        if use_default_material:
-            unique_materials[None] = None
-        create_materials(filepath, relpath, material_libs, unique_materials,
-                         use_image_search, float_func)
-
-        progress.step("Done, building geometries (verts:%i faces:%i materials: %i smoothgroups:%i) ..." %
-                      (len(verts_loc), len(faces), len(unique_materials), len(unique_smooth_groups)))
-
-        # deselect all
-        if bpy.ops.object.select_all.poll():
-            bpy.ops.object.select_all(action='DESELECT')
-
-        new_objects = []  # put new objects here
-
-        # Split the mesh by objects/materials, may
-        SPLIT_OB_OR_GROUP = bool(use_split_objects or use_split_groups)
-
-        for data in split_mesh(verts_loc, faces, unique_materials, filepath, SPLIT_OB_OR_GROUP):
-            verts_loc_split, faces_split, unique_materials_split, dataname, use_vnor, use_vtex = data
-            # Create meshes from the data, warning 'vertex_groups' wont support splitting
-            #~ print(dataname, use_vnor, use_vtex)
-            create_mesh(new_objects,
-                        use_edges,
-                        verts_loc_split,
-                        verts_nor if use_vnor else [],
-                        verts_tex if use_vtex else [],
-                        faces_split,
-                        unique_materials_split,
-                        unique_smooth_groups,
-                        vertex_groups,
-                        dataname,
-                        )
-
-        # nurbs support
-        for context_nurbs in nurbs:
-            create_nurbs(context_nurbs, verts_loc, new_objects)
-
-        view_layer = context.view_layer
-        collection = view_layer.active_layer_collection.collection
-
-        # Create new obj
-        for obj in new_objects:
-            collection.objects.link(obj)
-            obj.select_set(True)
-
-            # we could apply this anywhere before scaling.
-            obj.matrix_world = global_matrix
-
-        view_layer.update()
-
-        axis_min = [1000000000] * 3
-        axis_max = [-1000000000] * 3
-
-        if global_clamp_size:
-            # Get all object bounds
-            for ob in new_objects:
-                for v in ob.bound_box:
-                    for axis, value in enumerate(v):
-                        if axis_min[axis] > value:
-                            axis_min[axis] = value
-                        if axis_max[axis] < value:
-                            axis_max[axis] = value
-
-            # Scale objects
-            max_axis = max(axis_max[0] - axis_min[0], axis_max[1] - axis_min[1], axis_max[2] - axis_min[2])
-            scale = 1.0
-
-            while global_clamp_size < max_axis * scale:
-                scale = scale / 10.0
-
-            for obj in new_objects:
-                obj.scale = scale, scale, scale
-
-        progress.leave_substeps("Done.")
-        progress.leave_substeps("Finished importing: %r" % filepath)
-
-    return {'FINISHED'}