blender/release/scripts/op/io_scene_obj/import_obj.py

1220 lines
44 KiB
Python

# ##### 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 PolyFill
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= PolyFill([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= PolyFill([ [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()