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#!BPY
"""
Name: 'PLY...'
Blender: 237
Group: 'Import'
Tip: 'Import a Stanford PLY file'
"""
__author__ = "Bruce Merry"
__version__ = "0.91"
__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.
# 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 p in range(len(self.properties)):
if self.properties[p].name == name: return p
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 range(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 range(count):
fmt = format + "i"
data = stream.read(struct.calcsize(fmt))
length = struct.unpack(fmt, data)[0]
fmt = format + str(length) + "s"
data = stream.read(struct.calcsize(fmt))
s = struct.unpack(fmt, data)[0]
ans.append(s[0:-1]) # strip the NULL
return ans
else:
fmt = format + str(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):
answer = {}
for i in self.specs:
answer[i.name] = []
for j in range(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:
line = file.readline()
tokens = re.split(r'[ \n]+', line)
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(mesh, vertices, varr, indices, uvindices, colindices):
face = Blender.NMesh.Face()
for index in indices:
vertex = vertices[index];
face.v.append(varr[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))
mesh.faces.append(face)
def filesel_callback(filename):
(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 = (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()
for v in obj["vertex"]:
x = v[vindices[0]]
y = v[vindices[1]]
z = v[vindices[2]]
if noindices > 0:
nx = v[noindices[0]]
ny = v[noindices[1]]
nz = v[noindices[2]]
vkey = (x, y, z, nx, ny, nz)
else:
vkey = (x, y, z)
if not vmap.has_key(vkey):
mesh.verts.append(Blender.NMesh.Vert(x, y, z))
if noindices > 0:
mesh.verts[-1].no[0] = nx
mesh.verts[-1].no[1] = ny
mesh.verts[-1].no[2] = nz
vmap[vkey] = mesh.verts[-1]
varr.append(vmap[vkey])
for f in obj["face"]:
ind = f[findex]
nind = len(ind)
if nind <= 4:
add_face(mesh, obj["vertex"], varr, ind, uvindices, colindices)
else:
for j in range(nind - 2):
add_face(mesh, obj["vertex"], varr, (ind[0], ind[j + 1], ind[j + 2]), uvindices, colindices)
obj = None # 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)
meshtools.print_boxed(message)
Blender.Window.FileSelector(filesel_callback, "Import PLY")
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