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Diffstat (limited to 'io_scene_obj/import_obj.py')
| -rw-r--r-- | io_scene_obj/import_obj.py | 1219 |
1 files changed, 1219 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..c0c64c3d --- /dev/null +++ b/io_scene_obj/import_obj.py @@ -0,0 +1,1219 @@ +# ##### 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 mathutils.geometry import tesselate_polygon +from io_utils import load_image, unpack_list, unpack_face_list + + +def BPyMesh_ngon(from_data, indices, PREF_FIX_LOOPS= True): + ''' + Takes a polyline of indices (fgon) + and returns a list of face indicie lists. + Designed to be used for importers that need indices for an fgon to create from existing verts. + + from_data: either a mesh, or a list/tuple of vectors. + indices: a list of indicies to use this list is the ordered closed polyline to fill, and can be a subset of the data given. + PREF_FIX_LOOPS: If this is enabled polylines that use loops to make multiple polylines are delt with correctly. + ''' + + if not set: # Need sets for this, otherwise do a normal fill. + PREF_FIX_LOOPS= False + + Vector= mathutils.Vector + if not indices: + return [] + + # return [] + def rvec(co): return round(co.x, 6), round(co.y, 6), round(co.z, 6) + def mlen(co): return abs(co[0])+abs(co[1])+abs(co[2]) # manhatten length of a vector, faster then length + + def vert_treplet(v, i): + return v, rvec(v), i, mlen(v) + + def ed_key_mlen(v1, v2): + if v1[3] > v2[3]: + return v2[1], v1[1] + else: + return v1[1], v2[1] + + + if not PREF_FIX_LOOPS: + ''' + Normal single concave loop filling + ''' + if type(from_data) in (tuple, list): + verts= [Vector(from_data[i]) for ii, i in enumerate(indices)] + else: + verts= [from_data.vertices[i].co for ii, i in enumerate(indices)] + + for i in range(len(verts)-1, 0, -1): # same as reversed(xrange(1, len(verts))): + if verts[i][1]==verts[i-1][0]: + verts.pop(i-1) + + fill= fill_polygon([verts]) + + else: + ''' + Seperate this loop into multiple loops be finding edges that are used twice + This is used by lightwave LWO files a lot + ''' + + if type(from_data) in (tuple, list): + verts= [vert_treplet(Vector(from_data[i]), ii) for ii, i in enumerate(indices)] + else: + verts= [vert_treplet(from_data.vertices[i].co, ii) for ii, i in enumerate(indices)] + + edges= [(i, i-1) for i in range(len(verts))] + if edges: + edges[0]= (0,len(verts)-1) + + if not verts: + return [] + + + edges_used= set() + edges_doubles= set() + # We need to check if any edges are used twice location based. + for ed in edges: + edkey= ed_key_mlen(verts[ed[0]], verts[ed[1]]) + if edkey in edges_used: + edges_doubles.add(edkey) + else: + edges_used.add(edkey) + + # Store a list of unconnected loop segments split by double edges. + # will join later + loop_segments= [] + + v_prev= verts[0] + context_loop= [v_prev] + loop_segments= [context_loop] + + for v in verts: + if v!=v_prev: + # Are we crossing an edge we removed? + if ed_key_mlen(v, v_prev) in edges_doubles: + context_loop= [v] + loop_segments.append(context_loop) + else: + if context_loop and context_loop[-1][1]==v[1]: + #raise "as" + pass + else: + context_loop.append(v) + + v_prev= v + # Now join loop segments + + def join_seg(s1,s2): + if s2[-1][1]==s1[0][1]: # + s1,s2= s2,s1 + elif s1[-1][1]==s2[0][1]: + pass + else: + return False + + # If were stuill here s1 and s2 are 2 segments in the same polyline + s1.pop() # remove the last vert from s1 + s1.extend(s2) # add segment 2 to segment 1 + + if s1[0][1]==s1[-1][1]: # remove endpoints double + s1.pop() + + s2[:]= [] # Empty this segment s2 so we dont use it again. + return True + + joining_segments= True + while joining_segments: + joining_segments= False + segcount= len(loop_segments) + + for j in range(segcount-1, -1, -1): #reversed(range(segcount)): + seg_j= loop_segments[j] + if seg_j: + for k in range(j-1, -1, -1): # reversed(range(j)): + if not seg_j: + break + seg_k= loop_segments[k] + + if seg_k and join_seg(seg_j, seg_k): + joining_segments= True + + loop_list= loop_segments + + for verts in loop_list: + while verts and verts[0][1]==verts[-1][1]: + verts.pop() + + loop_list= [verts for verts in loop_list if len(verts)>2] + # DONE DEALING WITH LOOP FIXING + + + # vert mapping + vert_map= [None]*len(indices) + ii=0 + for verts in loop_list: + if len(verts)>2: + for i, vert in enumerate(verts): + vert_map[i+ii]= vert[2] + ii+=len(verts) + + fill= tesselate_polygon([ [v[0] for v in loop] for loop in loop_list ]) + #draw_loops(loop_list) + #raise 'done loop' + # map to original indicies + fill= [[vert_map[i] for i in reversed(f)] for f in fill] + + + if not fill: + print('Warning Cannot scanfill, fallback on a triangle fan.') + fill= [ [0, i-1, i] for i in range(2, len(indices)) ] + else: + # Use real scanfill. + # See if its flipped the wrong way. + flip= None + for fi in fill: + if flip != None: + break + for i, vi in enumerate(fi): + if vi==0 and fi[i-1]==1: + flip= False + break + elif vi==1 and fi[i-1]==0: + flip= True + break + + if not flip: + for i, fi in enumerate(fill): + fill[i]= tuple([ii for ii in reversed(fi)]) + + return fill + +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 ' '.join( line_split[1:] ) + + +def obj_image_load(imagepath, DIR, IMAGE_SEARCH): + if '_' in imagepath: + image= load_image(imagepath.replace('_', ' '), DIR) + if image: + return image + + image = load_image(imagepath, DIR) + if image: + return image + + print("failed to load '%s' doesn't exist", imagepath) + return None + +# def obj_image_load(imagepath, DIR, 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= IMAGE_SEARCH) +# if image: return image +# # Did the exporter rename the image? +# image= BPyImage.comprehensiveImageLoad(imagepath.replace('_', ' '), DIR, PLACE_HOLDER= False, RECURSIVE= IMAGE_SEARCH) +# if image: return image + +# # Return an image, placeholder if it dosnt exist +# image= BPyImage.comprehensiveImageLoad(imagepath, DIR, PLACE_HOLDER= True, RECURSIVE= IMAGE_SEARCH) +# return image + + +def create_materials(filepath, material_libs, unique_materials, unique_material_images, 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, 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.mipmap = True + texture.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.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_ambient = True + + elif type == 'Ks': + mtex = blender_material.texture_slots.add() + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_specular = True + + elif type == 'Bump': + mtex = blender_material.texture_slots.add() + mtex.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_normal = True + + elif type == 'D': + mtex = blender_material.texture_slots.add() + 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.texture = texture + mtex.texture_coords = 'UV' + mtex.use_map_reflect = True + + + # 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] + '.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 != None: + unique_materials[name]= bpy.data.materials.new(name) + 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: + mtlpath= os.path.join(DIR, libname) + if not os.path.exists(mtlpath): + print ("\tError Missing MTL: '%s'" % mtlpath) + else: + #print '\t\tloading mtl: "%s"' % mtlpath + context_material= None + mtl= open(mtlpath, 'rU') + for line in mtl: #.xreadlines(): + if line.startswith('newmtl'): + context_material_name= line_value(line.split()) + if context_material_name in unique_materials: + context_material = unique_materials[ context_material_name ] + else: + context_material = None + + 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('ka'): + context_material.mirror_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith('kd'): + context_material.diffuse_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith('ks'): + context_material.specular_color = float(line_split[1]), float(line_split[2]), float(line_split[3]) + elif line_lower.startswith('ns'): + context_material.specular_hardness = int((float(line_split[1]) * 0.51)) + elif line_lower.startswith('ni'): # Refraction index + context_material.raytrace_transparency.ior = max(1, min(float(line_split[1]), 3)) # between 1 and 3 + elif line_lower.startswith('d') or line_lower.startswith('tr'): + context_material.alpha = float(line_split[1]) + context_material.use_transparency = True + context_material.transparency_method = 'Z_TRANSPARENCY' + elif line_lower.startswith('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('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('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('map_bump'): + img_filepath= line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'Bump') + elif line_lower.startswith('map_d') or line_lower.startswith('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('refl'): # reflectionmap + img_filepath= line_value(line.split()) + if img_filepath: + load_material_image(context_material, context_material_name, img_filepath, 'refl') + 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_indicies= face[0] + + # Remap verts to new vert list and add where needed + for enum, i in enumerate(face_vert_loc_indicies): + 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_indicies[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_indicies[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, CREATE_FGONS, CREATE_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 + ''' + if not has_ngons: + CREATE_FGONS= 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 CREATE_EDGES: + edges= [] + + context_object= None + + # reverse loop through face indicies + for f_idx in range(len(faces)-1, -1, -1): + + face_vert_loc_indicies,\ + face_vert_tex_indicies,\ + context_material,\ + context_smooth_group,\ + context_object= faces[f_idx] + + len_face_vert_loc_indicies = len(face_vert_loc_indicies) + + if len_face_vert_loc_indicies==1: + faces.pop(f_idx)# cant add single vert faces + + elif not face_vert_tex_indicies or len_face_vert_loc_indicies == 2: # faces that have no texture coords are lines + if CREATE_EDGES: + # generators are better in python 2.4+ but can't be used in 2.3 + # edges.extend( (face_vert_loc_indicies[i], face_vert_loc_indicies[i+1]) for i in xrange(len_face_vert_loc_indicies-1) ) + edges.extend( [(face_vert_loc_indicies[i], face_vert_loc_indicies[i+1]) for i in range(len_face_vert_loc_indicies-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_indicies): + i1= face_vert_loc_indicies[i] + i2= face_vert_loc_indicies[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_indicies > 4: + + ngon_face_indices= BPyMesh_ngon(verts_loc, face_vert_loc_indicies) + faces.extend( + [( + [face_vert_loc_indicies[ngon[0]], face_vert_loc_indicies[ngon[1]], face_vert_loc_indicies[ngon[2]] ], + [face_vert_tex_indicies[ngon[0]], face_vert_tex_indicies[ngon[1]], face_vert_tex_indicies[ngon[2]] ], + context_material, + context_smooth_group, + context_object) + for ngon in ngon_face_indices] + ) + + # edges to make fgons + if CREATE_FGONS: + edge_users= {} + for ngon in ngon_face_indices: + for i in (0,1,2): + i1= face_vert_loc_indicies[ngon[i ]] + i2= face_vert_loc_indicies[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) + + # 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 CREATE_EDGES: + edges.append(face[0]) + else: + + blender_face = me.faces[i] + + face_vert_loc_indicies,\ + face_vert_tex_indicies,\ + 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_indicies)==4: + if face_vert_loc_indicies[2]==0 or face_vert_loc_indicies[3]==0: + face_vert_tex_indicies= face_vert_tex_indicies[2], face_vert_tex_indicies[3], face_vert_tex_indicies[0], face_vert_tex_indicies[1] + else: # length of 3 + if face_vert_loc_indicies[2]==0: + face_vert_tex_indicies= face_vert_tex_indicies[1], face_vert_tex_indicies[2], face_vert_tex_indicies[0] + # END EEEKADOODLE FIX + + # assign material, uv's and image + blender_tface.uv1= verts_tex[face_vert_tex_indicies[0]] + blender_tface.uv2= verts_tex[face_vert_tex_indicies[1]] + blender_tface.uv3= verts_tex[face_vert_tex_indicies[2]] + + if len(face_vert_loc_indicies)==4: + blender_tface.uv4= verts_tex[face_vert_tex_indicies[3]] + +# for ii, uv in enumerate(blender_face.uv): +# uv.x, uv.y= verts_tex[face_vert_tex_indicies[ii]] + del me_faces +# del ALPHA + + if CREATE_EDGES and not edges: + CREATE_EDGES = False + + if CREATE_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 CREATE_FGONS 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 CREATE_FGONS 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.update(calc_edges=CREATE_EDGES) +# me.calcNormals() + + 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_indicies in vertex_groups.items(): + group= ob.vertex_groups.new(group_name) + ob.vertex_groups.assign(group_indicies, group, 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('deg', (3,)) + curv_range = context_nurbs.get('curv_range') + curv_idx = context_nurbs.get('curv_idx', []) + parm_u = context_nurbs.get('parm_u', []) + parm_v = context_nurbs.get('parm_v', []) + name = context_nurbs.get('name', 'ObjNurb') + cstype = context_nurbs.get('cstype') + + if cstype is None: + print('\tWarning, cstype not found') + return + if cstype != '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, '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("Nurb", cu) + + new_objects.append(ob) + + +def strip_slash(line_split): + if line_split[-1][-1]== '\\': + 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, 'rU') + for line in file: #.xreadlines(): + line = line.lstrip() + if line.startswith('v'): # vn vt v + if ',' in line: + return lambda f: float(f.replace(',', '.')) + elif '.' in line: + return float + + # incase all vert values were ints + return float + +def load(operator, context, filepath, + CLAMP_SIZE= 0.0, + CREATE_FGONS= True, + CREATE_SMOOTH_GROUPS= True, + CREATE_EDGES= True, + SPLIT_OBJECTS= True, + SPLIT_GROUPS= True, + ROTATE_X90= True, + IMAGE_SEARCH=True, + POLYGROUPS=False): + ''' + 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) + + if SPLIT_OBJECTS or SPLIT_GROUPS: + POLYGROUPS = False + + time_main= time.time() +# time_main= sys.time() + + verts_loc= [] + verts_tex= [] + faces= [] # tuples of the faces + material_libs= [] # filanems to material libs this uses + vertex_groups = {} # when POLYGROUPS 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 = '' # 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= '' + + print("\tparsing obj file...") + time_sub= time.time() +# time_sub= sys.time() + + file= open(filepath, 'rU') + for line in file: #.xreadlines(): + line = line.lstrip() # rare cases there is white space at the start of the line + + if line.startswith('v '): + line_split= line.split() + # rotate X90: (x,-z,y) + verts_loc.append( (float_func(line_split[1]), -float_func(line_split[3]), float_func(line_split[2])) ) + + elif line.startswith('vn '): + pass + + elif line.startswith('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('f') or context_multi_line == 'f': + + if context_multi_line: + # use face_vert_loc_indicies and face_vert_tex_indicies previously defined and used the obj_face + line_split= line.split() + + else: + line_split= line[2:].split() + face_vert_loc_indicies= [] + face_vert_tex_indicies= [] + + # Instance a face + faces.append((\ + face_vert_loc_indicies,\ + face_vert_tex_indicies,\ + context_material,\ + context_smooth_group,\ + context_object\ + )) + + if strip_slash(line_split): + context_multi_line = 'f' + else: + context_multi_line = '' + + for v in line_split: + obj_vert= v.split('/') + + 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 POLYGROUPS and context_vgroup: + vertex_groups[context_vgroup].append(vert_loc_index) + + # Make relative negative vert indicies absolute + if vert_loc_index < 0: + vert_loc_index= len(verts_loc) + vert_loc_index + 1 + + face_vert_loc_indicies.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 indicies absolute + if vert_tex_index < 0: + vert_tex_index= len(verts_tex) + vert_tex_index + 1 + + face_vert_tex_indicies.append(vert_tex_index) + else: + # dummy + face_vert_tex_indicies.append(0) + + if len(face_vert_loc_indicies) > 4: + has_ngons= True + + elif CREATE_EDGES and (line.startswith('l ') or context_multi_line == 'l'): + # very similar to the face load function above with some parts removed + + if context_multi_line: + # use face_vert_loc_indicies and face_vert_tex_indicies previously defined and used the obj_face + line_split= line.split() + + else: + line_split= line[2:].split() + face_vert_loc_indicies= [] + face_vert_tex_indicies= [] + + # Instance a face + faces.append((\ + face_vert_loc_indicies,\ + face_vert_tex_indicies,\ + context_material,\ + context_smooth_group,\ + context_object\ + )) + + if strip_slash(line_split): + context_multi_line = 'l' + else: + context_multi_line = '' + + isline= line.startswith('l') + + for v in line_split: + vert_loc_index= int(v)-1 + + # Make relative negative vert indicies absolute + if vert_loc_index < 0: + vert_loc_index= len(verts_loc) + vert_loc_index + 1 + + face_vert_loc_indicies.append(vert_loc_index) + + elif line.startswith('s'): + if CREATE_SMOOTH_GROUPS: + context_smooth_group= line_value(line.split()) + if context_smooth_group=='off': + context_smooth_group= None + elif context_smooth_group: # is not None + unique_smooth_groups[context_smooth_group]= None + + elif line.startswith('o'): + if SPLIT_OBJECTS: + context_object= line_value(line.split()) + # unique_obects[context_object]= None + + elif line.startswith('g'): + if SPLIT_GROUPS: + context_object= line_value(line.split()) + # print 'context_object', context_object + # unique_obects[context_object]= None + elif POLYGROUPS: + context_vgroup = line_value(line.split()) + if context_vgroup and context_vgroup != '(null)': + vertex_groups.setdefault(context_vgroup, []) + else: + context_vgroup = None # dont assign a vgroup + + elif line.startswith('usemtl'): + context_material= line_value(line.split()) + unique_materials[context_material]= None + elif line.startswith('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('cstype '): + context_nurbs['cstype']= line_value(line.split()) # 'rat bspline' / 'bspline' + elif line.startswith('curv ') or context_multi_line == 'curv': + line_split= line.split() + + curv_idx = context_nurbs['curv_idx'] = context_nurbs.get('curv_idx', []) # incase were multiline + + if not context_multi_line: + context_nurbs['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 = 'curv' + else: + context_multi_line = '' + + + 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('parm') or context_multi_line == 'parm': + line_split= line.split() + + if context_multi_line: + context_multi_line = '' + else: + context_parm = line_split[1] + line_split[0:2] = [] # remove first 2 + + if strip_slash(line_split): + context_multi_line = 'parm' + else: + context_multi_line = '' + + if context_parm.lower() == 'u': + context_nurbs.setdefault('parm_u', []).extend( [float_func(f) for f in line_split] ) + elif context_parm.lower() == 'v': # surfaces not suported yet + context_nurbs.setdefault('parm_v', []).extend( [float_func(f) for f in line_split] ) + # else: # may want to support other parm's ? + + elif line.startswith('deg '): + context_nurbs['deg']= [int(i) for i in line.split()[1:]] + elif line.startswith('end'): + # Add the nurbs curve + if context_object: + context_nurbs['name'] = context_object + nurbs.append(context_nurbs) + context_nurbs = {} + context_parm = '' + + ''' # How to use usemap? depricated? + elif line.startswith('usema'): # usemap or usemat + context_image= line_value(line.split()) + ''' + + file.close() + time_new= time.time() +# time_new= sys.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, IMAGE_SEARCH) + + time_new= time.time() +# time_new= sys.time() + print('%.4f sec' % (time_new-time_sub)) + time_sub= time_new + + if not ROTATE_X90: + verts_loc[:] = [(v[0], v[2], -v[1]) for v in verts_loc] + + # deselect all + 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 SPLIT_OBJECTS or 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, CREATE_FGONS, CREATE_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 + + scene.update() + + + axis_min= [ 1000000000]*3 + axis_max= [-1000000000]*3 + +# if CLAMP_SIZE: +# # Get all object bounds +# for ob in new_objects: +# for v in ob.getBoundBox(): +# 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 CLAMP_SIZE < max_axis * scale: +# scale= scale/10.0 + +# for ob in new_objects: +# ob.setSize(scale, scale, scale) + + # Better rotate the vert locations + #if not ROTATE_X90: + # for ob in new_objects: + # ob.RotX = -1.570796326794896558 + + time_new= time.time() +# time_new= sys.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() + +if __name__ == "__main__": + register() |