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blender/release/scripts/ply_import.py
Campbell Barton 5e19642c55 Speedup by a factor of about 20%
2006-01-26 15:39:38 +00:00

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#!BPY
"""
Name: 'PLY...'
Blender: 237
Group: 'Import'
Tip: 'Import a Stanford PLY file'
"""
__author__ = 'Bruce Merry'
__version__ = '0.92'
__bpydoc__ = """\
This script imports Stanford PLY files into Blender. It supports per-vertex
normals, and per-face colours and texture coordinates.
Usage:
Run this script from "File->Import" and select the desired PLY file.
"""
# Copyright (C) 2004, 2005: Bruce Merry, bmerry@cs.uct.ac.za
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Updated by Campbell Barton AKA Ideasman, 10% faster code.
# Portions of this code are taken from mod_meshtools.py in Blender
# 2.32.
import Blender, meshtools
import re, struct, StringIO
class element_spec:
name = ''
count = 0
def __init__(self, name, count):
self.name = name
self.count = count
self.properties = []
def load(self, format, stream):
if format == 'ascii':
stream = re.split('\s+', stream.readline())
return map(lambda x: x.load(format, stream), self.properties)
def index(self, name):
for i, p in enumerate(self.properties):
if p.name == name: return i
return -1
class property_spec:
name = ''
list_type = ''
numeric_type = ''
def __init__(self, name, list_type, numeric_type):
self.name = name
self.list_type = list_type
self.numeric_type = numeric_type
def read_format(self, format, count, num_type, stream):
if format == 'ascii':
if (num_type == 's'):
ans = []
for i in xrange(count):
s = stream[i]
if len(s) < 2 or s[0] != '"' or s[-1] != '"':
print 'Invalid string', s
print 'Note: ply_import.py does not handle whitespace in strings'
return None
ans.append(s[1:-1])
stream[:count] = []
return ans
if (num_type == 'f' or num_type == 'd'):
mapper = float
else:
mapper = int
ans = map(lambda x: mapper(x), stream[:count])
stream[:count] = []
return ans
else:
if (num_type == 's'):
ans = []
for i in xrange(count):
fmt = format + 'i'
data = stream.read(struct.calcsize(fmt))
length = struct.unpack(fmt, data)[0]
fmt = '%s%is' % (format, length)
data = stream.read(struct.calcsize(fmt))
s = struct.unpack(fmt, data)[0]
ans.append(s[:-1]) # strip the NULL
return ans
else:
fmt = '%s%i%s' % (format, count, num_type)
data = stream.read(struct.calcsize(fmt));
return struct.unpack(fmt, data)
def load(self, format, stream):
if (self.list_type != None):
count = int(self.read_format(format, 1, self.list_type, stream)[0])
return self.read_format(format, count, self.numeric_type, stream)
else:
return self.read_format(format, 1, self.numeric_type, stream)[0]
class object_spec:
'A list of element_specs'
specs = []
def load(self, format, stream):
return dict([(i.name,[i.load(format, stream) for j in xrange(i.count) ]) for i in self.specs])
'''
answer = {}
for i in self.specs:
answer[i.name] = []
for j in xrange(i.count):
if not j % 100 and meshtools.show_progress:
Blender.Window.DrawProgressBar(float(j) / i.count, 'Loading ' + i.name)
answer[i.name].append(i.load(format, stream))
return answer
'''
def read(filename):
format = ''
version = '1.0'
format_specs = {'binary_little_endian': '<',
'binary_big_endian': '>',
'ascii': 'ascii'}
type_specs = {'char': 'b',
'uchar': 'B',
'int8': 'b',
'uint8': 'B',
'int16': 'h',
'uint16': 'H',
'int': 'i',
'int32': 'i',
'uint': 'I',
'uint32': 'I',
'float': 'f',
'float32': 'f',
'float64': 'd',
'string': 's'}
obj_spec = object_spec()
try:
file = open(filename, 'rb')
signature = file.readline()
if (signature != 'ply\n'):
print 'Signature line was invalid'
return None
while 1:
tokens = re.split(r'[ \n]+', file.readline())
if (len(tokens) == 0):
continue
if (tokens[0] == 'end_header'):
break
elif (tokens[0] == 'comment' or tokens[0] == 'obj_info'):
continue
elif (tokens[0] == 'format'):
if (len(tokens) < 3):
print 'Invalid format line'
return None
if (tokens[1] not in format_specs.keys()):
print 'Unknown format', tokens[1]
return None
if (tokens[2] != version):
print 'Unknown version', tokens[2]
return None
format = tokens[1]
elif (tokens[0] == 'element'):
if (len(tokens) < 3):
print 'Invalid element line'
return None
obj_spec.specs.append(element_spec(tokens[1], int(tokens[2])))
elif (tokens[0] == 'property'):
if (not len(obj_spec.specs)):
print 'Property without element'
return None
if (tokens[1] == 'list'):
obj_spec.specs[-1].properties.append(property_spec(tokens[4], type_specs[tokens[2]], type_specs[tokens[3]]))
else:
obj_spec.specs[-1].properties.append(property_spec(tokens[2], None, type_specs[tokens[1]]))
obj = obj_spec.load(format_specs[format], file)
except IOError, (errno, strerror):
file.close()
return None
file.close()
return (obj_spec, obj);
def add_face(vertices, varr, indices, uvindices, colindices):
face = Blender.NMesh.Face([varr[i] for i in indices])
for index in indices:
vertex = vertices[index];
if uvindices:
face.uv.append((vertex[uvindices[0]], 1.0 - vertex[uvindices[1]]))
if colindices:
if not uvindices: face.uv.append((0, 0)) # Force faceUV
face.col.append(Blender.NMesh.Col(vertex[colindices[0]], vertex[colindices[1]], vertex[colindices[2]], 255))
return face
def filesel_callback(filename):
t = Blender.sys.time()
(obj_spec, obj) = read(filename)
if obj == None:
print 'Invalid file'
return
vmap = {}
varr = []
uvindices = None
noindices = None
colindices = None
for el in obj_spec.specs:
if el.name == 'vertex':
vindices = vindices_x, vindices_y, vindices_z = (el.index('x'), el.index('y'), el.index('z'))
if el.index('nx') >= 0 and el.index('ny') >= 0 and el.index('nz') >= 0:
noindices = (el.index('nx'), el.index('ny'), el.index('nz'))
if el.index('s') >= 0 and el.index('t') >= 0:
uvindices = (el.index('s'), el.index('t'))
if el.index('red') >= 0 and el.index('green') and el.index('blue') >= 0:
colindices = (el.index('red'), el.index('green'), el.index('blue'))
elif el.name == 'face':
findex = el.index('vertex_indices')
mesh = Blender.NMesh.GetRaw()
NMVert = Blender.NMesh.Vert
for v in obj['vertex']:
if noindices > 0:
x,y,z,nx,ny,nz = vkey =\
(v[vindices_x], v[vindices_y], v[vindices_z],\
v[noindices[0]], v[noindices[1]], v[noindices[2]])
else:
x,y,z = vkey = (v[vindices_x], v[vindices_y], v[vindices_z])
#if not vmap.has_key(vkey):
try: # try uses 1 less dict lookup
varr.append(vmap[vkey])
except:
nmv = NMVert(vkey[0], vkey[1], vkey[2])
mesh.verts.append(nmv)
if noindices > 0:
nmv.no[0] = vkey[3]
nmv.no[1] = vkey[4]
nmv.no[2] = vkey[5]
vmap[vkey] = nmv
varr.append(vmap[vkey])
verts = obj['vertex']
for f in obj['face']:
ind = f[findex]
nind = len(ind)
if nind <= 4:
mesh.faces.append(add_face(verts, varr, ind, uvindices, colindices))
else:
for j in xrange(nind - 2):
mesh.faces.append(add_face(verts, varr, (ind[0], ind[j + 1], ind[j + 2]), uvindices, colindices))
del obj # Reclaim memory
if noindices:
normals = 1
else:
normals = 0
objname = Blender.sys.splitext(Blender.sys.basename(filename))[0]
if not meshtools.overwrite_mesh_name:
objname = meshtools.versioned_name(objname)
Blender.NMesh.PutRaw(mesh, objname, not normals)
Blender.Object.GetSelected()[0].name = objname
Blender.Redraw()
Blender.Window.DrawProgressBar(1.0, '')
message = 'Successfully imported ' + Blender.sys.basename(filename) + ' ' + str(Blender.sys.time()-t)
meshtools.print_boxed(message)
Blender.Window.FileSelector(filesel_callback, 'Import PLY')
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