diff options
Diffstat (limited to 'io_scene_obj/import_obj.py')
| -rw-r--r-- | io_scene_obj/import_obj.py | 1174 |
1 files changed, 1174 insertions, 0 deletions
diff --git a/io_scene_obj/import_obj.py b/io_scene_obj/import_obj.py new file mode 100644 index 00000000..06304dea --- /dev/null +++ b/io_scene_obj/import_obj.py @@ -0,0 +1,1174 @@ +# ##### 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 os +import time +import bpy +import mathutils +from bpy_extras.io_utils import unpack_list, unpack_face_list +from bpy_extras.image_utils import load_image + + +def line_value(line_split): + ''' + Returns 1 string represneting the value for this line + None will be returned if theres 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 obj_image_load(imagepath, DIR, use_image_search): + if b'_' in imagepath: + image = load_image(imagepath.replace(b'_', b' '), DIR) + if image: + return image + + image = load_image(imagepath, DIR) + if image: + return image + + print("failed to load %r doesn't exist" % imagepath) + return None + +# def obj_image_load(imagepath, DIR, use_image_search): +# ''' +# Mainly uses comprehensiveImageLoad +# but tries to replace '_' with ' ' for Max's exporter replaces spaces with underscores. +# ''' + +# if '_' in imagepath: +# image= BPyImage.comprehensiveImageLoad(imagepath, DIR, PLACE_HOLDER= False, RECURSIVE= use_image_search) +# if image: return image +# # Did the exporter rename the image? +# image= BPyImage.comprehensiveImageLoad(imagepath.replace('_', ' '), DIR, PLACE_HOLDER= False, RECURSIVE= use_image_search) +# if image: return image + +# # Return an image, placeholder if it dosnt exist +# image= BPyImage.comprehensiveImageLoad(imagepath, DIR, PLACE_HOLDER= True, RECURSIVE= use_image_search) +# return image + + +def create_materials(filepath, material_libs, unique_materials, unique_material_images, use_image_search): + ''' + Create all the used materials in this obj, + assign colors and images to the materials from all referenced material libs + ''' + DIR = os.path.dirname(filepath) + + #==================================================================================# + # This function sets textures defined in .mtl file # + #==================================================================================# + def load_material_image(blender_material, context_material_name, imagepath, type): + + texture = bpy.data.textures.new(name=type, type='IMAGE') + + # Absolute path - c:\.. etc would work here + image = obj_image_load(imagepath, DIR, use_image_search) + has_data = False + + if image: + texture.image = image + has_data = image.has_data + + # Adds textures for materials (rendering) + if type == 'Kd': + if has_data and image.depth == 32: + # Image has alpha + + mtex = blender_material.texture_slots.add() + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_color_diffuse = True + mtex.use_map_alpha = True + + texture.use_mipmap = True + texture.use_interpolation = True + texture.use_alpha = True + blender_material.use_transparency = True + blender_material.alpha = 0.0 + else: + mtex = blender_material.texture_slots.add() + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_color_diffuse = True + + # adds textures to faces (Textured/Alt-Z mode) + # Only apply the diffuse texture to the face if the image has not been set with the inline usemat func. + unique_material_images[context_material_name] = image, has_data # set the texface image + + elif type == 'Ka': + mtex = blender_material.texture_slots.add() + mtex.use_map_color_diffuse = False + + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_ambient = True + + elif type == 'Ks': + mtex = blender_material.texture_slots.add() + mtex.use_map_color_diffuse = False + + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_specular = True + + elif type == 'Bump': + mtex = blender_material.texture_slots.add() + mtex.use_map_color_diffuse = False + + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_normal = True + + elif type == 'D': + mtex = blender_material.texture_slots.add() + mtex.use_map_color_diffuse = False + + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_alpha = True + blender_material.use_transparency = True + blender_material.transparency_method = 'Z_TRANSPARENCY' + blender_material.alpha = 0.0 + # Todo, unset deffuse material alpha if it has an alpha channel + + elif type == 'refl': + mtex = blender_material.texture_slots.add() + mtex.use_map_color_diffuse = False + + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_reflect = True + + else: + raise Exception("invalid type %r" % type) + + # Add an MTL with the same name as the obj if no MTLs are spesified. + temp_mtl = os.path.splitext((os.path.basename(filepath)))[0] + b'.mtl' + + if os.path.exists(os.path.join(DIR, temp_mtl)) and temp_mtl not in material_libs: + material_libs.append(temp_mtl) + del temp_mtl + + #Create new materials + for name in unique_materials: # .keys() + if name is not None: + unique_materials[name] = bpy.data.materials.new(name.decode('utf-8', "replace")) + unique_material_images[name] = None, False # assign None to all material images to start with, add to later. + + unique_materials[None] = None + unique_material_images[None] = None, False + + for libname in material_libs: + # print(libname) + mtlpath = os.path.join(DIR, libname) + if not os.path.exists(mtlpath): + print ("\tMaterial not found MTL: %r" % mtlpath) + else: + #print('\t\tloading mtl: %e' % mtlpath) + context_material = None + mtl = open(mtlpath, 'rb') + for line in mtl: # .readlines(): + line = line.strip() + if not line or line.startswith(b'#'): + pass + elif line.startswith(b'newmtl'): + context_material_name = line_value(line.split()) + context_material = unique_materials.get(context_material_name) + + elif context_material: + # we need to make a material to assign properties to it. + line_split = line.split() + line_lower = line.lower().lstrip() + if line_lower.startswith(b'ka'): + context_material.mirror_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith(b'kd'): + context_material.diffuse_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith(b'ks'): + context_material.specular_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith(b'ns'): + context_material.specular_hardness = int((float(line_split[1]) * 0.51)) + elif line_lower.startswith(b'ni'): # Refraction index + context_material.raytrace_transparency.ior = max(1, min(float(line_split[1]), 3)) # between 1 and 3 + elif line_lower.startswith(b'd') or line_lower.startswith(b'tr'): + context_material.alpha = float(line_split[1]) + context_material.use_transparency = True + context_material.transparency_method = 'Z_TRANSPARENCY' + elif line_lower.startswith(b'tf'): + # rgb, filter color, blender has no support for this. + pass + elif line_lower.startswith(b'illum'): + illum = int(line_split[1]) + + do_ambient = True + do_highlight = False + do_reflection = False + do_transparency = False + do_glass = False + do_fresnel = False + do_raytrace = False + + # inline comments are from the spec, v4.2 + if illum == 0: + # Color on and Ambient off + do_ambient = False + 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 + do_raytrace = True + elif illum == 4: + # Transparency: Glass on + # Reflection: Ray trace on + do_transparency = True + do_reflection = True + do_glass = True + do_raytrace = True + elif illum == 5: + # Reflection: Fresnel on and Ray trace on + do_reflection = True + do_fresnel = True + do_raytrace = True + elif illum == 6: + # Transparency: Refraction on + # Reflection: Fresnel off and Ray trace on + do_transparency = True + do_reflection = True + do_raytrace = True + elif illum == 7: + # Transparency: Refraction on + # Reflection: Fresnel on and Ray trace on + do_transparency = True + do_reflection = True + do_fresnel = True + do_raytrace = 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 = True + do_glass = True + elif illum == 10: + # Casts shadows onto invisible surfaces + + # blender cant do this + pass + + if do_ambient: + context_material.ambient = 1.0 + else: + context_material.ambient = 0.0 + + if do_highlight: + # FIXME, how else to use this? + context_material.specular_intensity = 1.0 + + if do_reflection: + context_material.raytrace_mirror.use = True + context_material.raytrace_mirror.reflect_factor = 1.0 + + if do_transparency: + context_material.use_transparency = True + context_material.transparency_method = 'RAYTRACE' if do_raytrace else 'Z_TRANSPARENCY' + context_material.alpha = 0.0 + + if do_glass: + context_material.raytrace_transparency.ior = 1.5 + + if do_fresnel: + context_material.raytrace_mirror.fresnel = 1.0 # could be any value for 'ON' + + """ + if do_raytrace: + context_material.use_raytrace = True + else: + context_material.use_raytrace = False + """ + # XXX, this is not following the OBJ spec, but this was + # written when raytracing wasnt default, annoying to disable for blender users. + context_material.use_raytrace = True + + elif line_lower.startswith(b'map_ka'): + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'Ka') + elif line_lower.startswith(b'map_ks'): + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'Ks') + elif line_lower.startswith(b'map_kd'): + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'Kd') + elif line_lower.startswith(b'map_bump') or line_lower.startswith(b'bump'): # 'bump' is incorrect but some files use it. + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'Bump') + elif line_lower.startswith(b'map_d') or line_lower.startswith(b'map_tr'): # Alpha map - Dissolve + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'D') + + elif line_lower.startswith(b'refl'): # reflectionmap + img_filepath = line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'refl') + else: + print("\t%r:%r (ignored)" % (filepath, line)) + mtl.close() + + +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: + # use the filename for the object name since we arnt chopping up the mesh. + return [(verts_loc, faces, unique_materials, filename)] + + 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 + else: + return 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: + key = face[4] + + if oldkey != key: + # Check the key has changed. + try: + verts_split, faces_split, unique_materials_split, vert_remap = face_split_dict[key] + except KeyError: + faces_split = [] + verts_split = [] + unique_materials_split = {} + vert_remap = [-1] * len(verts_loc) + + face_split_dict[key] = (verts_split, faces_split, unique_materials_split, vert_remap) + + oldkey = key + + face_vert_loc_indices = face[0] + + # Remap verts to new vert list and add where needed + for enum, i in enumerate(face_vert_loc_indices): + if vert_remap[i] == -1: + new_index = len(verts_split) + vert_remap[i] = new_index # set the new remapped index so we only add once and can reference next time. + face_vert_loc_indices[enum] = new_index # remap to the local index + verts_split.append(verts_loc[i]) # add the vert to the local verts + else: + face_vert_loc_indices[enum] = vert_remap[i] # remap to the local index + + matname = face[2] + if matname and matname not in unique_materials_split: + unique_materials_split[matname] = unique_materials[matname] + + faces_split.append(face) + + # remove one of the itemas and reorder + return [(value[0], value[1], value[2], key_to_name(key)) for key, value in list(face_split_dict.items())] + + +def create_mesh(new_objects, + has_ngons, + use_ngons, + use_edges, + verts_loc, + verts_tex, + faces, + unique_materials, + unique_material_images, + unique_smooth_groups, + vertex_groups, + dataname, + ): + ''' + Takes all the data gathered and generates a mesh, adding the new object to new_objects + deals with fgons, sharp edges and assigning materials + ''' + from bpy_extras.mesh_utils import ngon_tesselate + + if not has_ngons: + use_ngons = False + + if unique_smooth_groups: + sharp_edges = {} + smooth_group_users = {context_smooth_group: {} for context_smooth_group in list(unique_smooth_groups.keys())} + context_smooth_group_old = -1 + + # Split fgons into tri's + fgon_edges = {} # Used for storing fgon keys + if use_edges: + edges = [] + + context_object = None + + # reverse loop through face indices + for f_idx in range(len(faces) - 1, -1, -1): + + (face_vert_loc_indices, + face_vert_tex_indices, + context_material, + context_smooth_group, + context_object, + ) = faces[f_idx] + + 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 + + elif not face_vert_tex_indices or len_face_vert_loc_indices == 2: # faces that have no texture coords are lines + if use_edges: + # generators are better in python 2.4+ but can't be used in 2.3 + # edges.extend( (face_vert_loc_indices[i], face_vert_loc_indices[i+1]) for i in xrange(len_face_vert_loc_indices-1) ) + 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 + + for i in range(len_face_vert_loc_indices): + i1 = face_vert_loc_indices[i] + i2 = face_vert_loc_indices[i - 1] + if i1 > i2: + i1, i2 = i2, i1 + + try: + edge_dict[i1, i2] += 1 + except KeyError: + edge_dict[i1, i2] = 1 + + # FGons into triangles + if has_ngons and len_face_vert_loc_indices > 4: + + ngon_face_indices = ngon_tesselate(verts_loc, face_vert_loc_indices) + faces.extend([([face_vert_loc_indices[ngon[0]], + face_vert_loc_indices[ngon[1]], + face_vert_loc_indices[ngon[2]], + ], + [face_vert_tex_indices[ngon[0]], + face_vert_tex_indices[ngon[1]], + face_vert_tex_indices[ngon[2]], + ], + context_material, + context_smooth_group, + context_object, + ) + for ngon in ngon_face_indices] + ) + + # edges to make fgons + if use_ngons: + edge_users = {} + for ngon in ngon_face_indices: + for i in (0, 1, 2): + i1 = face_vert_loc_indices[ngon[i]] + i2 = face_vert_loc_indices[ngon[i - 1]] + if i1 > i2: + i1, i2 = i2, i1 + + try: + edge_users[i1, i2] += 1 + except KeyError: + edge_users[i1, i2] = 1 + + for key, users in edge_users.items(): + if users > 1: + fgon_edges[key] = None + + # remove all after 3, means we dont have to pop this one. + faces.pop(f_idx) + + # Build sharp edges + if unique_smooth_groups: + for edge_dict in list(smooth_group_users.values()): + for key, users in list(edge_dict.items()): + if users == 1: # This edge is on the boundry of a group + sharp_edges[key] = None + + # 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 list(material_mapping.items()): + materials[index] = unique_materials[name] + + me = bpy.data.meshes.new(dataname.decode('utf-8', "replace")) + + # make sure the list isnt too big + for material in materials: + me.materials.append(material) + + me.vertices.add(len(verts_loc)) + me.faces.add(len(faces)) + + # verts_loc is a list of (x, y, z) tuples + me.vertices.foreach_set("co", unpack_list(verts_loc)) + + # faces is a list of (vert_indices, texco_indices, ...) tuples + # XXX faces should contain either 3 or 4 verts + # XXX no check for valid face indices + me.faces.foreach_set("vertices_raw", unpack_face_list([f[0] for f in faces])) + + if verts_tex and me.faces: + me.uv_textures.new() + + context_material_old = -1 # avoid a dict lookup + mat = 0 # rare case it may be un-initialized. + me_faces = me.faces + + for i, face in enumerate(faces): + if len(face[0]) < 2: + pass # raise "bad face" + elif len(face[0]) == 2: + if use_edges: + edges.append(face[0]) + else: + + blender_face = me.faces[i] + + (face_vert_loc_indices, + face_vert_tex_indices, + context_material, + context_smooth_group, + context_object, + ) = face + + if context_smooth_group: + blender_face.use_smooth = True + + if context_material: + if context_material_old is not context_material: + mat = material_mapping[context_material] + context_material_old = context_material + + blender_face.material_index = mat +# blender_face.mat= mat + + if verts_tex: + + blender_tface = me.uv_textures[0].data[i] + + if context_material: + image, has_data = unique_material_images[context_material] + if image: # Can be none if the material dosnt have an image. + blender_tface.image = image + blender_tface.use_image = True + if has_data and image.depth == 32: + blender_tface.blend_type = 'ALPHA' + + # BUG - Evil eekadoodle problem where faces that have vert index 0 location at 3 or 4 are shuffled. + if len(face_vert_loc_indices) == 4: + if face_vert_loc_indices[2] == 0 or face_vert_loc_indices[3] == 0: + face_vert_tex_indices = face_vert_tex_indices[2], face_vert_tex_indices[3], face_vert_tex_indices[0], face_vert_tex_indices[1] + else: # length of 3 + if face_vert_loc_indices[2] == 0: + face_vert_tex_indices = face_vert_tex_indices[1], face_vert_tex_indices[2], face_vert_tex_indices[0] + # END EEEKADOODLE FIX + + # assign material, uv's and image + blender_tface.uv1 = verts_tex[face_vert_tex_indices[0]] + blender_tface.uv2 = verts_tex[face_vert_tex_indices[1]] + blender_tface.uv3 = verts_tex[face_vert_tex_indices[2]] + + if len(face_vert_loc_indices) == 4: + blender_tface.uv4 = verts_tex[face_vert_tex_indices[3]] + +# for ii, uv in enumerate(blender_face.uv): +# uv.x, uv.y= verts_tex[face_vert_tex_indices[ii]] + del me_faces +# del ALPHA + + if use_edges and not edges: + use_edges = False + + 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_edges.extend( edges ) + +# del me_edges + + # Add edge faces. +# me_edges= me.edges + + def edges_match(e1, e2): + return (e1[0] == e2[0] and e1[1] == e2[1]) or (e1[0] == e2[1] and e1[1] == e2[0]) + + # XXX slow +# if use_ngons and fgon_edges: +# for fgon_edge in fgon_edges.keys(): +# for ed in me.edges: +# if edges_match(fgon_edge, ed.vertices): +# ed.is_fgon = True + +# if use_ngons and fgon_edges: +# FGON= Mesh.EdgeFlags.FGON +# for ed in me.findEdges( fgon_edges.keys() ): +# if ed is not None: +# me_edges[ed].flag |= FGON +# del FGON + + # XXX slow +# if unique_smooth_groups and sharp_edges: +# for sharp_edge in sharp_edges.keys(): +# for ed in me.edges: +# if edges_match(sharp_edge, ed.vertices): +# ed.use_edge_sharp = True + +# if unique_smooth_groups and sharp_edges: +# SHARP= Mesh.EdgeFlags.SHARP +# for ed in me.findEdges( sharp_edges.keys() ): +# if ed is not None: +# me_edges[ed].flag |= SHARP +# del SHARP + + me.validate() + me.update(calc_edges=use_edges) + + ob = bpy.data.objects.new("Mesh", 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(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() + # incase all vert values were ints + return float + + +def load(operator, context, filepath, + global_clamp_size=0.0, + use_ngons=True, + use_smooth_groups=True, + use_edges=True, + use_split_objects=True, + use_split_groups=True, + use_image_search=True, + use_groups_as_vgroups=False, + 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 + ''' + print('\nimporting obj %r' % filepath) + + filepath = os.fsencode(filepath) + + if global_matrix is None: + global_matrix = mathutils.Matrix() + + if use_split_objects or use_split_groups: + use_groups_as_vgroups = False + + time_main = time.time() + + verts_loc = [] + verts_tex = [] + faces = [] # tuples of the faces + material_libs = [] # filanems to material libs this 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 = None + context_vgroup = None + + # Nurbs + context_nurbs = {} + nurbs = [] + context_parm = b'' # used by nurbs too but could be used elsewhere + + has_ngons = False + # has_smoothgroups= False - is explicit with len(unique_smooth_groups) being > 0 + + # Until we can use sets + unique_materials = {} + unique_material_images = {} + 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'' + + print("\tparsing obj file...") + time_sub = time.time() +# time_sub= sys.time() + + file = open(filepath, 'rb') + for line in file: # .readlines(): + line = line.lstrip() # rare cases there is white space at the start of the line + + if line.startswith(b"v "): + line_split = line.split() + verts_loc.append((float_func(line_split[1]), float_func(line_split[2]), float_func(line_split[3]))) + + elif line.startswith(b"vn "): + pass + + elif line.startswith(b"vt "): + line_split = line.split() + verts_tex.append((float_func(line_split[1]), float_func(line_split[2]))) + + # Handel faces lines (as faces) and the second+ lines of fa multiline face here + # use 'f' not 'f ' because some objs (very rare have 'fo ' for faces) + elif line.startswith(b'f') or context_multi_line == b'f': + + if context_multi_line: + # use face_vert_loc_indices and face_vert_tex_indices previously defined and used the obj_face + line_split = line.split() + + else: + line_split = line[2:].split() + face_vert_loc_indices = [] + face_vert_tex_indices = [] + + # Instance a face + faces.append((face_vert_loc_indices, + face_vert_tex_indices, + context_material, + context_smooth_group, + context_object, + )) + + if strip_slash(line_split): + context_multi_line = b'f' + else: + context_multi_line = b'' + + for v in line_split: + obj_vert = v.split(b'/') + vert_loc_index = int(obj_vert[0]) - 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) + + # Make relative negative vert indices absolute + if vert_loc_index < 0: + vert_loc_index = len(verts_loc) + vert_loc_index + 1 + + face_vert_loc_indices.append(vert_loc_index) + + if len(obj_vert) > 1 and obj_vert[1]: + # formatting for faces with normals and textures us + # loc_index/tex_index/nor_index + + vert_tex_index = int(obj_vert[1]) - 1 + # Make relative negative vert indices absolute + if vert_tex_index < 0: + vert_tex_index = len(verts_tex) + vert_tex_index + 1 + + face_vert_tex_indices.append(vert_tex_index) + else: + # dummy + face_vert_tex_indices.append(0) + + if len(face_vert_loc_indices) > 4: + has_ngons = True + + elif use_edges and (line.startswith(b'l ') or context_multi_line == b'l'): + # very similar to the face load function above with some parts removed + + if context_multi_line: + # use face_vert_loc_indices and face_vert_tex_indices previously defined and used the obj_face + line_split = line.split() + + else: + line_split = line[2:].split() + face_vert_loc_indices = [] + face_vert_tex_indices = [] + + # Instance a face + faces.append((face_vert_loc_indices, + face_vert_tex_indices, + context_material, + context_smooth_group, + context_object, + )) + + if strip_slash(line_split): + context_multi_line = b'l' + else: + context_multi_line = b'' + + # isline = line.startswith(b'l') # UNUSED + + for v in line_split: + vert_loc_index = int(v) - 1 + + # Make relative negative vert indices absolute + if vert_loc_index < 0: + vert_loc_index = len(verts_loc) + vert_loc_index + 1 + + face_vert_loc_indices.append(vert_loc_index) + + elif line.startswith(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.startswith(b'o'): + if use_split_objects: + context_object = line_value(line.split()) + # unique_obects[context_object]= None + + elif line.startswith(b'g'): + if use_split_groups: + context_object = line_value(line.split()) + # print 'context_object', context_object + # unique_obects[context_object]= 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.startswith(b'usemtl'): + context_material = line_value(line.split()) + unique_materials[context_material] = None + elif line.startswith(b'mtllib'): # usemap or usemat + material_libs = list(set(material_libs) | set(line.split()[1:])) # can have multiple mtllib filenames per line, mtllib can appear more than once, so make sure only occurance of material exists + + # Nurbs support + elif line.startswith(b'cstype '): + context_nurbs[b'cstype'] = line_value(line.split()) # 'rat bspline' / 'bspline' + elif line.startswith(b'curv ') or context_multi_line == b'curv': + line_split = line.split() + + curv_idx = context_nurbs[b'curv_idx'] = context_nurbs.get(b'curv_idx', []) # incase 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.startswith(b'parm') or context_multi_line == b'parm': + line_split = line.split() + + 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.startswith(b'deg '): + context_nurbs[b'deg'] = [int(i) for i in line.split()[1:]] + elif line.startswith(b'end'): + # Add the nurbs curve + if context_object: + context_nurbs[b'name'] = context_object + nurbs.append(context_nurbs) + context_nurbs = {} + context_parm = b'' + + ''' # How to use usemap? depricated? + elif line.startswith(b'usema'): # usemap or usemat + context_image= line_value(line.split()) + ''' + + file.close() + time_new = time.time() + print("%.4f sec" % (time_new - time_sub)) + time_sub = time_new + + print('\tloading materials and images...') + create_materials(filepath, material_libs, unique_materials, unique_material_images, use_image_search) + + time_new = time.time() + print("%.4f sec" % (time_new - time_sub)) + time_sub = time_new + + # deselect all + if bpy.ops.object.select_all.poll(): + bpy.ops.object.select_all(action='DESELECT') + + scene = context.scene +# scn.objects.selected = [] + new_objects = [] # put new objects here + + print('\tbuilding geometry...\n\tverts:%i faces:%i materials: %i smoothgroups:%i ...' % (len(verts_loc), len(faces), len(unique_materials), len(unique_smooth_groups))) + # Split the mesh by objects/materials, may + if use_split_objects or use_split_groups: + SPLIT_OB_OR_GROUP = True + else: + SPLIT_OB_OR_GROUP = False + + for verts_loc_split, faces_split, unique_materials_split, dataname in split_mesh(verts_loc, faces, unique_materials, filepath, SPLIT_OB_OR_GROUP): + # Create meshes from the data, warning 'vertex_groups' wont support splitting + create_mesh(new_objects, + has_ngons, + use_ngons, + use_edges, + verts_loc_split, + verts_tex, + faces_split, + unique_materials_split, + unique_material_images, + unique_smooth_groups, + vertex_groups, + dataname, + ) + + # nurbs support + for context_nurbs in nurbs: + create_nurbs(context_nurbs, verts_loc, new_objects) + + # Create new obj + for obj in new_objects: + base = scene.objects.link(obj) + base.select = True + + # we could apply this anywhere before scaling. + obj.matrix_world = global_matrix + + scene.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 + + time_new = time.time() + + print("finished importing: %r in %.4f sec." % (filepath, (time_new - time_main))) + return {'FINISHED'} + + +# NOTES (all line numbers refer to 2.4x import_obj.py, not this file) +# check later: line 489 +# can convert now: edge flags, edges: lines 508-528 +# ngon (uses python module BPyMesh): 384-414 +# NEXT clamp size: get bound box with RNA +# get back to l 140 (here) +# search image in bpy.config.textureDir - load_image +# replaced BPyImage.comprehensiveImageLoad with a simplified version that only checks additional directory specified, but doesn't search dirs recursively (obj_image_load) +# bitmask won't work? - 132 +# uses bpy.sys.time() |