1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
#!BPY
"""
Name: 'LightWave (.lwo)...'
Blender: 232
Group: 'Import'
Tooltip: 'Import LightWave Object File Format (.lwo)'
"""
# $Id$
#
# +---------------------------------------------------------+
# | Copyright (c) 2002 Anthony D'Agostino |
# | http://www.redrival.com/scorpius |
# | scorpius@netzero.com |
# | April 21, 2002 |
# | Released under the Blender Artistic Licence (BAL) |
# | Import Export Suite v0.5 |
# +---------------------------------------------------------+
# | Read and write LightWave Object File Format (*.lwo) |
# +---------------------------------------------------------+
import Blender, mod_meshtools
import struct, chunk, os, cStringIO, time, operator
# =============================
# === Read LightWave Format ===
# =============================
def read(filename):
start = time.clock()
file = open(filename, "rb")
# === LWO header ===
form_id, form_size, form_type = struct.unpack(">4s1L4s", file.read(12))
if (form_type != "LWOB") and (form_type != "LWO2"):
print "Can't read a file with the form_type:", form_type
return
objname = os.path.splitext(os.path.basename(filename))[0]
while 1:
try:
lwochunk = chunk.Chunk(file)
except EOFError:
break
if lwochunk.chunkname == "LAYR":
objname = read_layr(lwochunk)
elif lwochunk.chunkname == "PNTS": # Verts
verts = read_verts(lwochunk)
elif lwochunk.chunkname == "POLS" and form_type == "LWO2": # Faces v6.0
faces = read_faces_6(lwochunk)
mod_meshtools.create_mesh(verts, faces, objname)
elif lwochunk.chunkname == "POLS" and form_type == "LWOB": # Faces v5.5
faces = read_faces_5(lwochunk)
mod_meshtools.create_mesh(verts, faces, objname)
else: # Misc Chunks
lwochunk.skip()
Blender.Window.DrawProgressBar(1.0, "") # clear progressbar
file.close()
end = time.clock()
seconds = " in %.2f %s" % (end-start, "seconds")
if form_type == "LWO2": fmt = " (v6.0 Format)"
if form_type == "LWOB": fmt = " (v5.5 Format)"
message = "Successfully imported " + os.path.basename(filename) + fmt + seconds
mod_meshtools.print_boxed(message)
# ==================
# === Read Verts ===
# ==================
def read_verts(lwochunk):
data = cStringIO.StringIO(lwochunk.read())
numverts = lwochunk.chunksize/12
#$verts = []
verts = [None] * numverts
for i in range(numverts):
if not i%100 and mod_meshtools.show_progress:
Blender.Window.DrawProgressBar(float(i)/numverts, "Reading Verts")
x, y, z = struct.unpack(">fff", data.read(12))
#$verts.append((x, z, y))
verts[i] = (x, z, y)
return verts
# =================
# === Read Name ===
# =================
def read_name(file):
name = ""
while 1:
char = file.read(1)
if char == "\0": break
else: name += char
return name
# ==================
# === Read Layer ===
# ==================
def read_layr(lwochunk):
data = cStringIO.StringIO(lwochunk.read())
idx, flags = struct.unpack(">hh", data.read(4))
pivot = struct.unpack(">fff", data.read(12))
layer_name = read_name(data)
if not layer_name: layer_name = "No Name"
return layer_name
# ======================
# === Read Faces 5.5 ===
# ======================
def read_faces_5(lwochunk):
data = cStringIO.StringIO(lwochunk.read())
faces = []
i = 0
while i < lwochunk.chunksize:
if not i%100 and mod_meshtools.show_progress:
Blender.Window.DrawProgressBar(float(i)/lwochunk.chunksize, "Reading Faces")
facev = []
numfaceverts, = struct.unpack(">H", data.read(2))
for j in range(numfaceverts):
index, = struct.unpack(">H", data.read(2))
facev.append(index)
facev.reverse()
faces.append(facev)
surfaceindex, = struct.unpack(">H", data.read(2))
if surfaceindex < 0:
print "detail polygons follow, error."
return
i += (4+numfaceverts*2)
return faces
# ==================================
# === Read Variable-Length Index ===
# ==================================
def read_vx(data):
byte1, = struct.unpack(">B", data.read(1))
if byte1 != 0xFF: # 2-byte index
byte2, = struct.unpack(">B", data.read(1))
index = byte1*256 + byte2
index_size = 2
else: # 4-byte index
byte2, byte3, byte4 = struct.unpack(">3B", data.read(3))
index = byte2*65536 + byte3*256 + byte4
index_size = 4
return index, index_size
# ======================
# === Read Faces 6.0 ===
# ======================
def read_faces_6(lwochunk):
data = cStringIO.StringIO(lwochunk.read())
faces = []
polygon_type = data.read(4)
if polygon_type != "FACE":
print "No Faces Were Found. Polygon Type:", polygon_type
return ""
i = 0
while(i < lwochunk.chunksize-4):
if not i%100 and mod_meshtools.show_progress:
Blender.Window.DrawProgressBar(float(i)/lwochunk.chunksize, "Reading Faces")
facev = []
numfaceverts, = struct.unpack(">H", data.read(2))
i += 2
for j in range(numfaceverts):
index, index_size = read_vx(data)
i += index_size
facev.append(index)
facev.reverse()
faces.append(facev)
return faces
def fs_callback(filename):
read(filename)
Blender.Window.FileSelector(fs_callback, "Import LWO")
|
