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blender/release/scripts/io/export_obj.py
Brecht Van Lommel 9498121463 Object API changes so these functions now require a scene as first argument: 
create_mesh, create_dupli_list, make_display_list and is_visible.

This is done in order to make these context independent as the RNA API should
be as much as possible, and to fix #21297 and #21719, where there was an
assumption from these functions that there is a scene in the context, which
does not work for external render engines exporting in a separate thread.

Also avoided using context in a number of other functions, ideally only UI/WM
type functions should use context.

I've updated the scripts in trunk, but the addons and external ones in
development will need updates too.
2010-04-06 01:28:39 +00:00

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# ##### 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>
"""
Name: 'Wavefront (.obj)...'
Blender: 248
Group: 'Export'
Tooltip: 'Save a Wavefront OBJ File'
"""
__author__ = "Campbell Barton, Jiri Hnidek, Paolo Ciccone"
__url__ = ['http://wiki.blender.org/index.php/Scripts/Manual/Export/wavefront_obj', 'www.blender.org', 'blenderartists.org']
__version__ = "1.21"
__bpydoc__ = """\
This script is an exporter to OBJ file format.
Usage:
Select the objects you wish to export and run this script from "File->Export" menu.
Selecting the default options from the popup box will be good in most cases.
All objects that can be represented as a mesh (mesh, curve, metaball, surface, text3d)
will be exported as mesh data.
"""
# import math and other in functions that use them for the sake of fast Blender startup
# import math
import os
import time
import shutil
import bpy
import Mathutils
# Returns a tuple - path,extension.
# 'hello.obj' > ('hello', '.obj')
def splitExt(path):
dotidx = path.rfind('.')
if dotidx == -1:
return path, ''
else:
return path[:dotidx], path[dotidx:]
def fixName(name):
if name == None:
return 'None'
else:
return name.replace(' ', '_')
def write_mtl(scene, filename, copy_images, mtl_dict):
world = scene.world
worldAmb = world.ambient_color
dest_dir = os.path.dirname(filename)
def copy_image(image):
fn = bpy.utils.expandpath(image.filename)
fn_strip = os.path.basename(fn)
if copy_images:
rel = fn_strip
fn_abs_dest = os.path.join(dest_dir, fn_strip)
if not os.path.exists(fn_abs_dest):
shutil.copy(fn, fn_abs_dest)
else:
rel = fn
return rel
file = open(filename, "w")
# XXX
# file.write('# Blender MTL File: %s\n' % Blender.Get('filename').split('\\')[-1].split('/')[-1])
file.write('# Material Count: %i\n' % len(mtl_dict))
# Write material/image combinations we have used.
for key, (mtl_mat_name, mat, img) in mtl_dict.items():
# Get the Blender data for the material and the image.
# Having an image named None will make a bug, dont do it :)
file.write('newmtl %s\n' % mtl_mat_name) # Define a new material: matname_imgname
if mat:
file.write('Ns %.6f\n' % ((mat.specular_hardness-1) * 1.9607843137254901) ) # Hardness, convert blenders 1-511 to MTL's
file.write('Ka %.6f %.6f %.6f\n' % tuple([c*mat.ambient for c in worldAmb]) ) # Ambient, uses mirror colour,
file.write('Kd %.6f %.6f %.6f\n' % tuple([c*mat.diffuse_intensity for c in mat.diffuse_color]) ) # Diffuse
file.write('Ks %.6f %.6f %.6f\n' % tuple([c*mat.specular_intensity for c in mat.specular_color]) ) # Specular
if hasattr(mat, "ior"):
file.write('Ni %.6f\n' % mat.ior) # Refraction index
else:
file.write('Ni %.6f\n' % 1.0)
file.write('d %.6f\n' % mat.alpha) # Alpha (obj uses 'd' for dissolve)
# 0 to disable lighting, 1 for ambient & diffuse only (specular color set to black), 2 for full lighting.
if mat.shadeless:
file.write('illum 0\n') # ignore lighting
elif mat.specular_intensity == 0:
file.write('illum 1\n') # no specular.
else:
file.write('illum 2\n') # light normaly
else:
#write a dummy material here?
file.write('Ns 0\n')
file.write('Ka %.6f %.6f %.6f\n' % tuple([c for c in worldAmb]) ) # Ambient, uses mirror colour,
file.write('Kd 0.8 0.8 0.8\n')
file.write('Ks 0.8 0.8 0.8\n')
file.write('d 1\n') # No alpha
file.write('illum 2\n') # light normaly
# Write images!
if img: # We have an image on the face!
# write relative image path
rel = copy_image(img)
file.write('map_Kd %s\n' % rel) # Diffuse mapping image
# file.write('map_Kd %s\n' % img.filename.split('\\')[-1].split('/')[-1]) # Diffuse mapping image
elif mat: # No face image. if we havea material search for MTex image.
for mtex in mat.texture_slots:
if mtex and mtex.texture.type == 'IMAGE':
try:
filename = copy_image(mtex.texture.image)
# filename = mtex.texture.image.filename.split('\\')[-1].split('/')[-1]
file.write('map_Kd %s\n' % filename) # Diffuse mapping image
break
except:
# Texture has no image though its an image type, best ignore.
pass
file.write('\n\n')
file.close()
# XXX not used
def copy_file(source, dest):
file = open(source, 'rb')
data = file.read()
file.close()
file = open(dest, 'wb')
file.write(data)
file.close()
# XXX not used
def copy_images(dest_dir):
if dest_dir[-1] != os.sep:
dest_dir += os.sep
# if dest_dir[-1] != sys.sep:
# dest_dir += sys.sep
# Get unique image names
uniqueImages = {}
for matname, mat, image in mtl_dict.values(): # Only use image name
# Get Texface images
if image:
uniqueImages[image] = image # Should use sets here. wait until Python 2.4 is default.
# Get MTex images
if mat:
for mtex in mat.texture_slots:
if mtex and mtex.texture.type == 'IMAGE':
image_tex = mtex.texture.image
if image_tex:
try:
uniqueImages[image_tex] = image_tex
except:
pass
# Now copy images
copyCount = 0
# for bImage in uniqueImages.values():
# image_path = bpy.utils.expandpath(bImage.filename)
# if bpy.sys.exists(image_path):
# # Make a name for the target path.
# dest_image_path = dest_dir + image_path.split('\\')[-1].split('/')[-1]
# if not bpy.utils.exists(dest_image_path): # Image isnt alredy there
# print('\tCopying "%s" > "%s"' % (image_path, dest_image_path))
# copy_file(image_path, dest_image_path)
# copyCount+=1
# paths= bpy.util.copy_images(uniqueImages.values(), dest_dir)
print('\tCopied %d images' % copyCount)
# print('\tCopied %d images' % copyCount)
# XXX not converted
def test_nurbs_compat(ob):
if ob.type != 'Curve':
return False
for nu in ob.data:
if (not nu.knotsV) and nu.type != 1: # not a surface and not bezier
return True
return False
# XXX not converted
def write_nurb(file, ob, ob_mat):
tot_verts = 0
cu = ob.data
# use negative indices
Vector = Blender.Mathutils.Vector
for nu in cu:
if nu.type==0: DEG_ORDER_U = 1
else: DEG_ORDER_U = nu.orderU-1 # Tested to be correct
if nu.type==1:
print("\tWarning, bezier curve:", ob.name, "only poly and nurbs curves supported")
continue
if nu.knotsV:
print("\tWarning, surface:", ob.name, "only poly and nurbs curves supported")
continue
if len(nu) <= DEG_ORDER_U:
print("\tWarning, orderU is lower then vert count, skipping:", ob.name)
continue
pt_num = 0
do_closed = (nu.flagU & 1)
do_endpoints = (do_closed==0) and (nu.flagU & 2)
for pt in nu:
pt = Vector(pt[0], pt[1], pt[2]) * ob_mat
file.write('v %.6f %.6f %.6f\n' % (pt[0], pt[1], pt[2]))
pt_num += 1
tot_verts += pt_num
file.write('g %s\n' % (fixName(ob.name))) # fixName(ob.getData(1)) could use the data name too
file.write('cstype bspline\n') # not ideal, hard coded
file.write('deg %d\n' % DEG_ORDER_U) # not used for curves but most files have it still
curve_ls = [-(i+1) for i in range(pt_num)]
# 'curv' keyword
if do_closed:
if DEG_ORDER_U == 1:
pt_num += 1
curve_ls.append(-1)
else:
pt_num += DEG_ORDER_U
curve_ls = curve_ls + curve_ls[0:DEG_ORDER_U]
file.write('curv 0.0 1.0 %s\n' % (' '.join( [str(i) for i in curve_ls] ))) # Blender has no U and V values for the curve
# 'parm' keyword
tot_parm = (DEG_ORDER_U + 1) + pt_num
tot_parm_div = float(tot_parm-1)
parm_ls = [(i/tot_parm_div) for i in range(tot_parm)]
if do_endpoints: # end points, force param
for i in range(DEG_ORDER_U+1):
parm_ls[i] = 0.0
parm_ls[-(1+i)] = 1.0
file.write('parm u %s\n' % ' '.join( [str(i) for i in parm_ls] ))
file.write('end\n')
return tot_verts
def write(filename, objects, scene,
EXPORT_TRI=False,
EXPORT_EDGES=False,
EXPORT_NORMALS=False,
EXPORT_NORMALS_HQ=False,
EXPORT_UV=True,
EXPORT_MTL=True,
EXPORT_COPY_IMAGES=False,
EXPORT_APPLY_MODIFIERS=True,
EXPORT_ROTX90=True,
EXPORT_BLEN_OBS=True,
EXPORT_GROUP_BY_OB=False,
EXPORT_GROUP_BY_MAT=False,
EXPORT_KEEP_VERT_ORDER=False,
EXPORT_POLYGROUPS=False,
EXPORT_CURVE_AS_NURBS=True):
'''
Basic write function. The context and options must be alredy set
This can be accessed externaly
eg.
write( 'c:\\test\\foobar.obj', Blender.Object.GetSelected() ) # Using default options.
'''
# XXX
import math
def veckey3d(v):
return round(v.x, 6), round(v.y, 6), round(v.z, 6)
def veckey2d(v):
return round(v[0], 6), round(v[1], 6)
# return round(v.x, 6), round(v.y, 6)
def findVertexGroupName(face, vWeightMap):
"""
Searches the vertexDict to see what groups is assigned to a given face.
We use a frequency system in order to sort out the name because a given vetex can
belong to two or more groups at the same time. To find the right name for the face
we list all the possible vertex group names with their frequency and then sort by
frequency in descend order. The top element is the one shared by the highest number
of vertices is the face's group
"""
weightDict = {}
for vert_index in face.verts:
# for vert in face:
vWeights = vWeightMap[vert_index]
# vWeights = vWeightMap[vert]
for vGroupName, weight in vWeights:
weightDict[vGroupName] = weightDict.get(vGroupName, 0) + weight
if weightDict:
alist = [(weight,vGroupName) for vGroupName, weight in weightDict.items()] # sort least to greatest amount of weight
alist.sort()
return(alist[-1][1]) # highest value last
else:
return '(null)'
# TODO: implement this in C? dunno how it should be called...
def getVertsFromGroup(me, group_index):
ret = []
for i, v in enumerate(me.verts):
for g in v.groups:
if g.group == group_index:
ret.append((i, g.weight))
return ret
print('OBJ Export path: "%s"' % filename)
temp_mesh_name = '~tmp-mesh'
time1 = time.clock()
# time1 = sys.time()
# scn = Scene.GetCurrent()
file = open(filename, "w")
# Write Header
file.write('# Blender v%s OBJ File: %s\n' % (bpy.app.version_string, bpy.data.filename.split('/')[-1].split('\\')[-1] ))
file.write('# www.blender.org\n')
# Tell the obj file what material file to use.
if EXPORT_MTL:
mtlfilename = '%s.mtl' % '.'.join(filename.split('.')[:-1])
file.write('mtllib %s\n' % ( mtlfilename.split('\\')[-1].split('/')[-1] ))
if EXPORT_ROTX90:
mat_xrot90= Mathutils.RotationMatrix(-math.pi/2, 4, 'X')
# Initialize totals, these are updated each object
totverts = totuvco = totno = 1
face_vert_index = 1
globalNormals = {}
# A Dict of Materials
# (material.name, image.name):matname_imagename # matname_imagename has gaps removed.
mtl_dict = {}
# Get all meshes
for ob_main in objects:
# ignore dupli children
if ob_main.parent and ob_main.parent.dupli_type != 'NONE':
# XXX
print(ob_main.name, 'is a dupli child - ignoring')
continue
obs = []
if ob_main.dupli_type != 'NONE':
# XXX
print('creating dupli_list on', ob_main.name)
ob_main.create_dupli_list(scene)
obs = [(dob.object, dob.matrix) for dob in ob_main.dupli_list]
# XXX debug print
print(ob_main.name, 'has', len(obs), 'dupli children')
else:
obs = [(ob_main, ob_main.matrix)]
for ob, ob_mat in obs:
# XXX postponed
# # Nurbs curve support
# if EXPORT_CURVE_AS_NURBS and test_nurbs_compat(ob):
# if EXPORT_ROTX90:
# ob_mat = ob_mat * mat_xrot90
# totverts += write_nurb(file, ob, ob_mat)
# continue
# end nurbs
if ob.type != 'MESH':
continue
me = ob.create_mesh(scene, EXPORT_APPLY_MODIFIERS, 'PREVIEW')
if EXPORT_ROTX90:
me.transform(mat_xrot90 * ob_mat)
else:
me.transform(ob_mat)
# # Will work for non meshes now! :)
# me= BPyMesh.getMeshFromObject(ob, containerMesh, EXPORT_APPLY_MODIFIERS, EXPORT_POLYGROUPS, scn)
# if not me:
# continue
if EXPORT_UV:
faceuv = len(me.uv_textures) > 0
else:
faceuv = False
# XXX - todo, find a better way to do triangulation
# ...removed convert_to_triface because it relies on editmesh
'''
# We have a valid mesh
if EXPORT_TRI and me.faces:
# Add a dummy object to it.
has_quads = False
for f in me.faces:
if f.verts[3] != 0:
has_quads = True
break
if has_quads:
newob = bpy.data.objects.new('temp_object', me)
# if we forget to set Object.data - crash
scene.objects.link(newob)
newob.convert_to_triface(scene)
# mesh will still be there
scene.objects.unlink(newob)
'''
# Make our own list so it can be sorted to reduce context switching
face_index_pairs = [ (face, index) for index, face in enumerate(me.faces)]
# faces = [ f for f in me.faces ]
if EXPORT_EDGES:
edges = me.edges
else:
edges = []
if not (len(face_index_pairs)+len(edges)+len(me.verts)): # Make sure there is somthing to write
# clean up
bpy.data.meshes.remove(me)
continue # dont bother with this mesh.
# XXX
# High Quality Normals
if EXPORT_NORMALS and face_index_pairs:
me.calc_normals()
# if EXPORT_NORMALS_HQ:
# BPyMesh.meshCalcNormals(me)
# else:
# # transforming normals is incorrect
# # when the matrix is scaled,
# # better to recalculate them
# me.calcNormals()
materials = me.materials
materialNames = []
materialItems = [m for m in materials]
if materials:
for mat in materials:
if mat: # !=None
materialNames.append(mat.name)
else:
materialNames.append(None)
# Cant use LC because some materials are None.
# materialNames = map(lambda mat: mat.name, materials) # Bug Blender, dosent account for null materials, still broken.
# Possible there null materials, will mess up indicies
# but at least it will export, wait until Blender gets fixed.
materialNames.extend((16-len(materialNames)) * [None])
materialItems.extend((16-len(materialItems)) * [None])
# Sort by Material, then images
# so we dont over context switch in the obj file.
if EXPORT_KEEP_VERT_ORDER:
pass
elif faceuv:
# XXX update
tface = me.active_uv_texture.data
face_index_pairs.sort(key=lambda a: (a[0].material_index, hash(tface[a[1]].image), a[0].smooth))
elif len(materials) > 1:
face_index_pairs.sort(key = lambda a: (a[0].material_index, a[0].smooth))
else:
# no materials
face_index_pairs.sort(key = lambda a: a[0].smooth)
# if EXPORT_KEEP_VERT_ORDER:
# pass
# elif faceuv:
# try: faces.sort(key = lambda a: (a.mat, a.image, a.smooth))
# except: faces.sort(lambda a,b: cmp((a.mat, a.image, a.smooth), (b.mat, b.image, b.smooth)))
# elif len(materials) > 1:
# try: faces.sort(key = lambda a: (a.mat, a.smooth))
# except: faces.sort(lambda a,b: cmp((a.mat, a.smooth), (b.mat, b.smooth)))
# else:
# # no materials
# try: faces.sort(key = lambda a: a.smooth)
# except: faces.sort(lambda a,b: cmp(a.smooth, b.smooth))
faces = [pair[0] for pair in face_index_pairs]
# Set the default mat to no material and no image.
contextMat = (0, 0) # Can never be this, so we will label a new material teh first chance we get.
contextSmooth = None # Will either be true or false, set bad to force initialization switch.
if EXPORT_BLEN_OBS or EXPORT_GROUP_BY_OB:
name1 = ob.name
name2 = ob.data.name
if name1 == name2:
obnamestring = fixName(name1)
else:
obnamestring = '%s_%s' % (fixName(name1), fixName(name2))
if EXPORT_BLEN_OBS:
file.write('o %s\n' % obnamestring) # Write Object name
else: # if EXPORT_GROUP_BY_OB:
file.write('g %s\n' % obnamestring)
# Vert
for v in me.verts:
file.write('v %.6f %.6f %.6f\n' % tuple(v.co))
# UV
if faceuv:
uv_face_mapping = [[0,0,0,0] for f in faces] # a bit of a waste for tri's :/
uv_dict = {} # could use a set() here
uv_layer = me.active_uv_texture
for f, f_index in face_index_pairs:
tface = uv_layer.data[f_index]
# workaround, since tface.uv iteration is wrong atm
uvs = tface.uv
# uvs = [tface.uv1, tface.uv2, tface.uv3]
# # add another UV if it's a quad
# if len(f.verts) == 4:
# uvs.append(tface.uv4)
for uv_index, uv in enumerate(uvs):
uvkey = veckey2d(uv)
try:
uv_face_mapping[f_index][uv_index] = uv_dict[uvkey]
except:
uv_face_mapping[f_index][uv_index] = uv_dict[uvkey] = len(uv_dict)
file.write('vt %.6f %.6f\n' % tuple(uv))
# uv_dict = {} # could use a set() here
# for f_index, f in enumerate(faces):
# for uv_index, uv in enumerate(f.uv):
# uvkey = veckey2d(uv)
# try:
# uv_face_mapping[f_index][uv_index] = uv_dict[uvkey]
# except:
# uv_face_mapping[f_index][uv_index] = uv_dict[uvkey] = len(uv_dict)
# file.write('vt %.6f %.6f\n' % tuple(uv))
uv_unique_count = len(uv_dict)
# del uv, uvkey, uv_dict, f_index, uv_index
# Only need uv_unique_count and uv_face_mapping
# NORMAL, Smooth/Non smoothed.
if EXPORT_NORMALS:
for f in faces:
if f.smooth:
for vIdx in f.verts:
v = me.verts[vIdx]
noKey = veckey3d(v.normal)
if noKey not in globalNormals:
globalNormals[noKey] = totno
totno +=1
file.write('vn %.6f %.6f %.6f\n' % noKey)
else:
# Hard, 1 normal from the face.
noKey = veckey3d(f.normal)
if noKey not in globalNormals:
globalNormals[noKey] = totno
totno +=1
file.write('vn %.6f %.6f %.6f\n' % noKey)
if not faceuv:
f_image = None
# XXX
if EXPORT_POLYGROUPS:
# Retrieve the list of vertex groups
# vertGroupNames = me.getVertGroupNames()
currentVGroup = ''
# Create a dictionary keyed by face id and listing, for each vertex, the vertex groups it belongs to
vgroupsMap = [[] for _i in range(len(me.verts))]
# vgroupsMap = [[] for _i in xrange(len(me.verts))]
for g in ob.vertex_groups:
# for vertexGroupName in vertGroupNames:
for vIdx, vWeight in getVertsFromGroup(me, g.index):
# for vIdx, vWeight in me.getVertsFromGroup(vertexGroupName, 1):
vgroupsMap[vIdx].append((g.name, vWeight))
for f_index, f in enumerate(faces):
f_v = [{"index": index, "vertex": me.verts[index]} for index in f.verts]
# if f.verts[3] == 0:
# f_v.pop()
# f_v= f.v
f_smooth= f.smooth
f_mat = min(f.material_index, len(materialNames)-1)
# f_mat = min(f.mat, len(materialNames)-1)
if faceuv:
tface = me.active_uv_texture.data[face_index_pairs[f_index][1]]
f_image = tface.image
f_uv = tface.uv
# f_uv= [tface.uv1, tface.uv2, tface.uv3]
# if len(f.verts) == 4:
# f_uv.append(tface.uv4)
# f_image = f.image
# f_uv= f.uv
# MAKE KEY
if faceuv and f_image: # Object is always true.
key = materialNames[f_mat], f_image.name
else:
key = materialNames[f_mat], None # No image, use None instead.
# Write the vertex group
if EXPORT_POLYGROUPS:
if len(ob.vertex_groups):
# find what vertext group the face belongs to
theVGroup = findVertexGroupName(f,vgroupsMap)
if theVGroup != currentVGroup:
currentVGroup = theVGroup
file.write('g %s\n' % theVGroup)
# # Write the vertex group
# if EXPORT_POLYGROUPS:
# if vertGroupNames:
# # find what vertext group the face belongs to
# theVGroup = findVertexGroupName(f,vgroupsMap)
# if theVGroup != currentVGroup:
# currentVGroup = theVGroup
# file.write('g %s\n' % theVGroup)
# CHECK FOR CONTEXT SWITCH
if key == contextMat:
pass # Context alredy switched, dont do anything
else:
if key[0] == None and key[1] == None:
# Write a null material, since we know the context has changed.
if EXPORT_GROUP_BY_MAT:
# can be mat_image or (null)
file.write('g %s_%s\n' % (fixName(ob.name), fixName(ob.data.name)) ) # can be mat_image or (null)
file.write('usemtl (null)\n') # mat, image
else:
mat_data= mtl_dict.get(key)
if not mat_data:
# First add to global dict so we can export to mtl
# Then write mtl
# Make a new names from the mat and image name,
# converting any spaces to underscores with fixName.
# If none image dont bother adding it to the name
if key[1] == None:
mat_data = mtl_dict[key] = ('%s'%fixName(key[0])), materialItems[f_mat], f_image
else:
mat_data = mtl_dict[key] = ('%s_%s' % (fixName(key[0]), fixName(key[1]))), materialItems[f_mat], f_image
if EXPORT_GROUP_BY_MAT:
file.write('g %s_%s_%s\n' % (fixName(ob.name), fixName(ob.data.name), mat_data[0]) ) # can be mat_image or (null)
file.write('usemtl %s\n' % mat_data[0]) # can be mat_image or (null)
contextMat = key
if f_smooth != contextSmooth:
if f_smooth: # on now off
file.write('s 1\n')
contextSmooth = f_smooth
else: # was off now on
file.write('s off\n')
contextSmooth = f_smooth
file.write('f')
if faceuv:
if EXPORT_NORMALS:
if f_smooth: # Smoothed, use vertex normals
for vi, v in enumerate(f_v):
file.write( ' %d/%d/%d' % \
(v["index"] + totverts,
totuvco + uv_face_mapping[f_index][vi],
globalNormals[ veckey3d(v["vertex"].normal) ]) ) # vert, uv, normal
else: # No smoothing, face normals
no = globalNormals[ veckey3d(f.normal) ]
for vi, v in enumerate(f_v):
file.write( ' %d/%d/%d' % \
(v["index"] + totverts,
totuvco + uv_face_mapping[f_index][vi],
no) ) # vert, uv, normal
else: # No Normals
for vi, v in enumerate(f_v):
file.write( ' %d/%d' % (\
v["index"] + totverts,\
totuvco + uv_face_mapping[f_index][vi])) # vert, uv
face_vert_index += len(f_v)
else: # No UV's
if EXPORT_NORMALS:
if f_smooth: # Smoothed, use vertex normals
for v in f_v:
file.write( ' %d//%d' %
(v["index"] + totverts, globalNormals[ veckey3d(v["vertex"].normal) ]) )
else: # No smoothing, face normals
no = globalNormals[ veckey3d(f.normal) ]
for v in f_v:
file.write( ' %d//%d' % (v["index"] + totverts, no) )
else: # No Normals
for v in f_v:
file.write( ' %d' % (v["index"] + totverts) )
file.write('\n')
# Write edges.
if EXPORT_EDGES:
for ed in edges:
if ed.loose:
file.write('f %d %d\n' % (ed.verts[0] + totverts, ed.verts[1] + totverts))
# Make the indicies global rather then per mesh
totverts += len(me.verts)
if faceuv:
totuvco += uv_unique_count
# clean up
bpy.data.meshes.remove(me)
if ob_main.dupli_type != 'NONE':
ob_main.free_dupli_list()
file.close()
# Now we have all our materials, save them
if EXPORT_MTL:
write_mtl(scene, mtlfilename, EXPORT_COPY_IMAGES, mtl_dict)
# if EXPORT_COPY_IMAGES:
# dest_dir = os.path.basename(filename)
# # dest_dir = filename
# # # Remove chars until we are just the path.
# # while dest_dir and dest_dir[-1] not in '\\/':
# # dest_dir = dest_dir[:-1]
# if dest_dir:
# copy_images(dest_dir, mtl_dict)
# else:
# print('\tError: "%s" could not be used as a base for an image path.' % filename)
print("OBJ Export time: %.2f" % (time.clock() - time1))
# print "OBJ Export time: %.2f" % (sys.time() - time1)
def do_export(filename, context,
EXPORT_APPLY_MODIFIERS = True, # not used
EXPORT_ROTX90 = True, # wrong
EXPORT_TRI = False, # ok
EXPORT_EDGES = False,
EXPORT_NORMALS = False, # not yet
EXPORT_NORMALS_HQ = False, # not yet
EXPORT_UV = True, # ok
EXPORT_MTL = True,
EXPORT_SEL_ONLY = True, # ok
EXPORT_ALL_SCENES = False, # XXX not working atm
EXPORT_ANIMATION = False,
EXPORT_COPY_IMAGES = False,
EXPORT_BLEN_OBS = True,
EXPORT_GROUP_BY_OB = False,
EXPORT_GROUP_BY_MAT = False,
EXPORT_KEEP_VERT_ORDER = False,
EXPORT_POLYGROUPS = False,
EXPORT_CURVE_AS_NURBS = True):
base_name, ext = splitExt(filename)
context_name = [base_name, '', '', ext] # Base name, scene name, frame number, extension
orig_scene = context.scene
# Exit edit mode before exporting, so current object states are exported properly.
bpy.ops.object.mode_set(mode='OBJECT')
# if EXPORT_ALL_SCENES:
# export_scenes = bpy.data.scenes
# else:
# export_scenes = [orig_scene]
# XXX only exporting one scene atm since changing
# current scene is not possible.
# Brecht says that ideally in 2.5 we won't need such a function,
# allowing multiple scenes open at once.
export_scenes = [orig_scene]
# Export all scenes.
for scn in export_scenes:
# scn.makeCurrent() # If already current, this is not slow.
# context = scn.getRenderingContext()
orig_frame = scn.frame_current
if EXPORT_ALL_SCENES: # Add scene name into the context_name
context_name[1] = '_%s' % bpy.utils.clean_name(scn.name) # WARNING, its possible that this could cause a collision. we could fix if were feeling parranoied.
# Export an animation?
if EXPORT_ANIMATION:
scene_frames = range(scn.frame_start, context.frame_end + 1) # Up to and including the end frame.
else:
scene_frames = [orig_frame] # Dont export an animation.
# Loop through all frames in the scene and export.
for frame in scene_frames:
if EXPORT_ANIMATION: # Add frame to the filename.
context_name[2] = '_%.6d' % frame
scn.frame_current = frame
if EXPORT_SEL_ONLY:
export_objects = context.selected_objects
else:
export_objects = scn.objects
full_path= ''.join(context_name)
# erm... bit of a problem here, this can overwrite files when exporting frames. not too bad.
# EXPORT THE FILE.
write(full_path, export_objects, scn,
EXPORT_TRI, EXPORT_EDGES, EXPORT_NORMALS,
EXPORT_NORMALS_HQ, EXPORT_UV, EXPORT_MTL,
EXPORT_COPY_IMAGES, EXPORT_APPLY_MODIFIERS,
EXPORT_ROTX90, EXPORT_BLEN_OBS,
EXPORT_GROUP_BY_OB, EXPORT_GROUP_BY_MAT, EXPORT_KEEP_VERT_ORDER,
EXPORT_POLYGROUPS, EXPORT_CURVE_AS_NURBS)
scn.frame_current = orig_frame
# Restore old active scene.
# orig_scene.makeCurrent()
# Window.WaitCursor(0)
'''
Currently the exporter lacks these features:
* nurbs
* multiple scene export (only active scene is written)
* particles
'''
from bpy.props import *
class ExportOBJ(bpy.types.Operator):
'''Save a Wavefront OBJ File'''
bl_idname = "export.obj"
bl_label = 'Export OBJ'
# List of operator properties, the attributes will be assigned
# to the class instance from the operator settings before calling.
path = StringProperty(name="File Path", description="File path used for exporting the OBJ file", maxlen= 1024, default= "")
check_existing = BoolProperty(name="Check Existing", description="Check and warn on overwriting existing files", default=True, options={'HIDDEN'})
# context group
use_selection = BoolProperty(name="Selection Only", description="", default= False)
use_all_scenes = BoolProperty(name="All Scenes", description="", default= False)
use_animation = BoolProperty(name="All Animation", description="", default= False)
# object group
use_modifiers = BoolProperty(name="Apply Modifiers", description="", default= True)
use_rotate90 = BoolProperty(name="Rotate X90", description="", default= True)
# extra data group
use_edges = BoolProperty(name="Edges", description="", default= True)
use_normals = BoolProperty(name="Normals", description="", default= False)
use_hq_normals = BoolProperty(name="High Quality Normals", description="", default= True)
use_uvs = BoolProperty(name="UVs", description="", default= True)
use_materials = BoolProperty(name="Materials", description="", default= True)
copy_images = BoolProperty(name="Copy Images", description="", default= False)
use_triangles = BoolProperty(name="Triangulate", description="", default= False)
use_vertex_groups = BoolProperty(name="Polygroups", description="", default= False)
use_nurbs = BoolProperty(name="Nurbs", description="", default= False)
# grouping group
use_blen_objects = BoolProperty(name="Objects as OBJ Objects", description="", default= True)
group_by_object = BoolProperty(name="Objects as OBJ Groups ", description="", default= False)
group_by_material = BoolProperty(name="Material Groups", description="", default= False)
keep_vertex_order = BoolProperty(name="Keep Vertex Order", description="", default= False)
def execute(self, context):
path = self.properties.path
if not path.lower().endswith(".obj"):
path += ".obj"
do_export(path, context,
EXPORT_TRI=self.properties.use_triangles,
EXPORT_EDGES=self.properties.use_edges,
EXPORT_NORMALS=self.properties.use_normals,
EXPORT_NORMALS_HQ=self.properties.use_hq_normals,
EXPORT_UV=self.properties.use_uvs,
EXPORT_MTL=self.properties.use_materials,
EXPORT_COPY_IMAGES=self.properties.copy_images,
EXPORT_APPLY_MODIFIERS=self.properties.use_modifiers,
EXPORT_ROTX90=self.properties.use_rotate90,
EXPORT_BLEN_OBS=self.properties.use_blen_objects,
EXPORT_GROUP_BY_OB=self.properties.group_by_object,
EXPORT_GROUP_BY_MAT=self.properties.group_by_material,
EXPORT_KEEP_VERT_ORDER=self.properties.keep_vertex_order,
EXPORT_POLYGROUPS=self.properties.use_vertex_groups,
EXPORT_CURVE_AS_NURBS=self.properties.use_nurbs,
EXPORT_SEL_ONLY=self.properties.use_selection,
EXPORT_ALL_SCENES=self.properties.use_all_scenes)
return {'FINISHED'}
def invoke(self, context, event):
wm = context.manager
wm.add_fileselect(self)
return {'RUNNING_MODAL'}
def menu_func(self, context):
default_path = bpy.data.filename.replace(".blend", ".obj")
self.layout.operator(ExportOBJ.bl_idname, text="Wavefront (.obj)").path = default_path
def register():
bpy.types.register(ExportOBJ)
bpy.types.INFO_MT_file_export.append(menu_func)
def unregister():
bpy.types.unregister(ExportOBJ)
bpy.types.INFO_MT_file_export.remove(menu_func)
# CONVERSION ISSUES
# - matrix problem
# - duplis - only tested dupliverts
# - NURBS - needs API additions
# - all scenes export
# + normals calculation
if __name__ == "__main__":
register()
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