forked from bartvdbraak/blender
b367da593b
added ply import and export, extensively tested on files from http://www.cs.virginia.edu/~gfx/Courses/2001/Advanced.spring.01/plymodels/ they give correct results for both import and export, however they could use some speed optimization for large mesh
280 lines
12 KiB
Python
280 lines
12 KiB
Python
#!BPY
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"""
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Name: 'PLY...'
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Blender: 237
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Group: 'Import'
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Tip: 'Import a Stanford PLY file'
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"""
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__author__ = "Bruce Merry"
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__version__ = "0.9"
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__bpydoc__ = """\
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This script imports Stanford PLY files into Blender. It supports per-vertex
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normals, and per-face colours and texture coordinates.
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Usage:
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Run this script from "File->Import" and select the desired PLY file.
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"""
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# Copyright (C) 2004, 2005: Bruce Merry, bmerry@cs.uct.ac.za
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# Portions of this code are taken from mod_meshtools.py in Blender
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# 2.32.
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import Blender, meshtools
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import re, struct, StringIO
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class element_spec:
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name = ""
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count = 0
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def __init__(self, name, count):
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self.name = name
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self.count = count
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self.properties = []
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def load(self, format, stream):
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if format == "ascii":
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stream = re.split('\s+', stream.readline())
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return map(lambda x: x.load(format, stream), self.properties)
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def index(self, name):
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for p in range(len(self.properties)):
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if self.properties[p].name == name: return p
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return -1
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class property_spec:
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name = ""
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list_type = ""
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numeric_type = ""
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def __init__(self, name, list_type, numeric_type):
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self.name = name
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self.list_type = list_type
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self.numeric_type = numeric_type
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def read_format(self, format, count, num_type, stream):
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if format == "ascii":
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if (num_type == 's'):
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ans = []
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for i in range(count):
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s = stream[i]
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if len(s) < 2 or s[0] != "\"" or s[-1] != "\"":
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print "Invalid string", s
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print "Note: ply_import.py does not handle whitespace in strings"
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return None
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ans.append(s[1:-1])
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stream[:count] = []
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return ans
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if (num_type == 'f' or num_type == 'd'):
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mapper = float
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else:
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mapper = int
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ans = map(lambda x: mapper(x), stream[:count])
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stream[:count] = []
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return ans
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else:
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if (num_type == 's'):
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ans = []
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for i in range(count):
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fmt = format + "i"
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data = stream.read(struct.calcsize(fmt))
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length = struct.unpack(fmt, data)[0]
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fmt = format + str(length) + "s"
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data = stream.read(struct.calcsize(fmt))
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s = struct.unpack(fmt, data)[0]
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ans.append(s[0:-1]) # strip the NULL
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return ans
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else:
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fmt = format + str(count) + num_type
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data = stream.read(struct.calcsize(fmt));
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return struct.unpack(fmt, data)
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def load(self, format, stream):
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if (self.list_type != None):
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count = int(self.read_format(format, 1, self.list_type, stream)[0])
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return self.read_format(format, count, self.numeric_type, stream)
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else:
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return self.read_format(format, 1, self.numeric_type, stream)[0]
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class object_spec:
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"A list of element_specs"
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specs = []
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def load(self, format, stream):
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answer = {}
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for i in self.specs:
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answer[i.name] = []
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for j in range(i.count):
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if not j % 100 and meshtools.show_progress:
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Blender.Window.DrawProgressBar(float(j) / i.count, "Loading " + i.name)
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answer[i.name].append(i.load(format, stream))
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return answer
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def read(filename):
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format = ""
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version = "1.0"
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format_specs = {"binary_little_endian": "<",
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"binary_big_endian": ">",
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"ascii": "ascii"}
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type_specs = {"char": "b",
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"uchar": "B",
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"int8": "b",
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"uint8": "B",
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"int16": "h",
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"uint16": "H",
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"int": "i",
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"int32": "i",
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"uint": "I",
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"uint32": "I",
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"float": "f",
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"float32": "f",
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"float64": "d",
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"string": "s"}
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obj_spec = object_spec()
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try:
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file = open(filename, "rb")
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signature = file.readline()
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if (signature != "ply\n"):
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print "Signature line was invalid"
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return None
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while 1:
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line = file.readline()
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tokens = re.split(r'[ \n]+', line)
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if (len(tokens) == 0):
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continue
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if (tokens[0] == 'end_header'):
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break
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elif (tokens[0] == 'comment' or tokens[0] == 'obj_info'):
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continue
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elif (tokens[0] == 'format'):
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if (len(tokens) < 3):
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print "Invalid format line"
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return None
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if (tokens[1] not in format_specs.keys()):
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print "Unknown format " + tokens[1]
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return None
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if (tokens[2] != version):
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print "Unknown version " + tokens[2]
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return None
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format = tokens[1]
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elif (tokens[0] == "element"):
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if (len(tokens) < 3):
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print "Invalid element line"
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return None
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obj_spec.specs.append(element_spec(tokens[1], int(tokens[2])))
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elif (tokens[0] == "property"):
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if (not len(obj_spec.specs)):
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print "Property without element"
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return None
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if (tokens[1] == "list"):
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obj_spec.specs[-1].properties.append(property_spec(tokens[4], type_specs[tokens[2]], type_specs[tokens[3]]))
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else:
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obj_spec.specs[-1].properties.append(property_spec(tokens[2], None, type_specs[tokens[1]]))
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obj = obj_spec.load(format_specs[format], file)
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except IOError, (errno, strerror):
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file.close()
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return None
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file.close()
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return (obj_spec, obj);
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def add_face(mesh, vertices, varr, indices, uvindices, colindices):
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face = Blender.NMesh.Face()
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for index in indices:
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vertex = vertices[index];
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face.v.append(varr[index])
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if uvindices:
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face.uv.append((vertex[uvindices[0]], 1.0 - vertex[uvindices[1]]))
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if colindices:
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if not uvindices: face.uv.append((0, 0)) # Force faceUV
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face.col.append(Blender.NMesh.Col(vertex[colindices[0]], vertex[colindices[1]], vertex[colindices[2]], 255))
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mesh.faces.append(face)
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def filesel_callback(filename):
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(obj_spec, obj) = read(filename)
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if obj == None:
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print "Invalid file"
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return
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vmap = {}
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varr = []
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uvindices = None
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noindices = None
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colindices = None
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for el in obj_spec.specs:
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if el.name == "vertex":
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vindices = (el.index("x"), el.index("y"), el.index("z"))
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if el.index("nx") >= 0 and el.index("ny") >= 0 and el.index("nz") >= 0:
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noindices = (el.index("nx"), el.index("ny"), el.index("nz"))
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if el.index("s") >= 0 and el.index("t") >= 0:
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uvindices = (el.index("s"), el.index("t"))
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if el.index("red") >= 0 and el.index("green") and el.index("blue") >= 0:
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colindices = (el.index("red"), el.index("green"), el.index("blue"))
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elif el.name == "face":
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findex = el.index("vertex_indices")
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mesh = Blender.NMesh.GetRaw()
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for v in obj["vertex"]:
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x = v[vindices[0]]
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y = v[vindices[1]]
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z = v[vindices[2]]
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if noindices > 0:
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nx = v[noindices[0]]
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ny = v[noindices[1]]
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nz = v[noindices[2]]
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vkey = (x, y, z, nx, ny, nz)
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else:
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vkey = (x, y, z)
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if not vmap.has_key(vkey):
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mesh.verts.append(Blender.NMesh.Vert(x, y, z))
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if noindices > 0:
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mesh.verts[-1].no[0] = nx
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mesh.verts[-1].no[1] = ny
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mesh.verts[-1].no[2] = nz
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vmap[vkey] = mesh.verts[-1]
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varr.append(mesh.verts[-1])
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for f in obj["face"]:
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ind = f[findex]
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nind = len(ind)
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if nind <= 4:
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add_face(mesh, obj["vertex"], varr, ind, uvindices, colindices)
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else:
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for j in range(nind - 2):
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add_face(mesh, obj["vertex"], varr, (ind[0], ind[j + 1], ind[j + 2]), uvindices, colindices)
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obj = None # Reclaim memory
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if noindices:
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normals = 1
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else:
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normals = 0
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objname = Blender.sys.splitext(Blender.sys.basename(filename))[0]
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if not meshtools.overwrite_mesh_name:
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objname = meshtools.versioned_name(objname)
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Blender.NMesh.PutRaw(mesh, objname, not normals)
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Blender.Object.GetSelected()[0].name = objname
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Blender.Redraw()
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Blender.Window.DrawProgressBar(1.0, '')
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message = "Successfully imported " + Blender.sys.basename(filename)
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meshtools.print_boxed(message)
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Blender.Window.FileSelector(filesel_callback, "Import PLY")
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