Newer
Older
################################################################################
#
# df3.py
#
# Copyright (C) 2005 Mike Kost <contact@povray.tashcorp.net>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
################################################################################
#
# Creation functions
# __init__(x=1, y=1, z=1) : default constructor
# clone(indf3) : make this df3 look like indf3
#
# Info functions
# sizeX(): returns X dimension
# sizeY(): returns Y dimension
# sizeZ(): returns Z dimension
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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
#
# Scalar functions
# mult():
# add():
# max(): returns highest voxel value in df3
# min(): returns lowest voxel value in df3
#
# Vector functions
#
# Import/Export functions
# exportDF3():
# importDF3():
#
################################################################################
import struct
import os
import stat
import array
import sys
# -+-+-+- Start df3 Class -+-+-+-
class df3:
__version__ = '0.2'
__arraytype__ = 'f'
__struct4byte__ = '>I'
__struct2byte__ = '>H'
__struct2byte3__ = '>HHH'
__struct1byte__ = '>B'
__array4byte__ = 'I'
__array2byte__ = 'H'
__array1byte__ = 'B'
def __init__(self, x=1, y=1, z=1):
self.maxX = x
self.maxY = y
self.maxZ = z
self.voxel = self.__create__(x, y, z)
def clone(self, indf3):
self.voxel = array.array(self.__arraytype__)
for i in range(indf3.sizeX()*indf3.sizeY()*indf3.sizeZ()):
self.voxel[i] = indf3.voxel[i]
return self
#### Info Functions
def sizeX(self):
return self.maxX
def sizeY(self):
return self.maxY
def sizeZ(self):
return self.maxZ
def size(self):
tmp = []
tmp.append(self.sizeX())
tmp.append(self.sizeY())
tmp.append(self.sizeZ())
return tmp
#### Voxel Access Functions
def get(self, x, y, z):
return self.voxel[self.__voxa__(x,y,z)]
def getB(self, x, y, z):
if (x > self.sizeX() or x < 0): return 0
if (y > self.sizeX() or y < 0): return 0
if (z > self.sizeX() or z < 0): return 0
return self.voxel[self.__voxa__(x,y,z)]
def set(self, x, y, z, val):
self.voxel[self.__voxa__(x,y,z)] = val
def setB(self, x, y, z, val):
if (x > self.sizeX() or x < 0): return
if (y > self.sizeX() or y < 0): return
if (z > self.sizeX() or z < 0): return
self.voxel[self.__voxa__(x,y,z)] = val
#### Scalar Functions
def mult(self, val):
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
self.voxel[i] = self.voxel[i] * val
return self
def add(self, val):
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
self.voxel[i] = self.voxel[i] + val
return self
def max(self):
tmp = self.voxel[0]
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
if (self.voxel[i] > tmp):
tmp = self.voxel[i]
return tmp
def min(self):
tmp = self.voxel[0]
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
if (self.voxel[i] < tmp):
tmp = self.voxel[i]
return tmp
#### Vector Functions
def compare(self, indf3):
if (self.__samesize__(indf3) == 0): return 0
if (self.voxel == indf3.voxel):
return 1
return 0
def multV(self, indf3):
if (self.__samesize__(indf3) == 0):
print("Cannot multiply voxels - not same size")
return
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
self.voxel[i] = self.voxel[i]*indf3.voxel[i]
return self
def addV(self, indf3):
if (self.__samesize__(indf3) == 0):
print("Cannot add voxels - not same size")
return
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
self.voxel[i] = self.voxel[i]+indf3.voxel[i]
return self
def convolveV(self, filt):
fx = filt.sizeX()
fy = filt.sizeY()
fz = filt.sizeZ()
if (fx % 2 != 1):
print("Incompatible filter - must be odd number of X")
return self
if (fy % 2 != 1):
print("Incompatible filter - must be odd number of Y")
return self
if (fz % 2 != 1):
print("Incompatible filter - must be odd number of Z")
return self
fdx = (fx-1)/2
fdy = (fy-1)/2
fdz = (fz-1)/2
flen = fx*fy*fz
newV = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ());
for x in range(self.sizeX()):
for y in range(self.sizeY()):
for z in range(self.sizeZ()):
rip = self.__rip__(x-fdx, x+fdx, y-fdy, y+fdy, z-fdz, z+fdz)
tmp = 0.0
for i in range(flen):
tmp += rip[i]*filt.voxel[i]
newV[self.__voxa__(x,y,z)] = tmp
self.voxel = newV
return self
#### Import/Export Functions
def exportDF3(self, file, depth=8, rescale=1):
x = self.sizeX()
y = self.sizeY()
z = self.sizeZ()
try:
f = open(file, 'wb');
except:
print("Could not open " + file + " for write");
return
f.write(struct.pack(self.__struct2byte3__, x, y, z));
tmp = self.__toInteger__(pow(2,depth)-1, rescale)
if (depth > 16): # 32-bit
for i in range( x*y*z ):
f.write(struct.pack(self.__struct4byte__, tmp[i]))
elif (depth > 8): # 16-bit
for i in range( x*y*z ):
f.write(struct.pack(self.__struct2byte__, tmp[i]))
else:
for i in range( x*y*z ):
f.write(struct.pack(self.__struct1byte__, tmp[i]))
def importDF3(self, file, scale=1):
try:
f = open(file, 'rb');
size = os.stat(file)[stat.ST_SIZE]
except:
print("Could not open " + file + " for read");
return []
(x, y, z) = struct.unpack(self.__struct2byte3__, f.read(6) )
self.voxel = self.__create__(x, y, z)
self.maxX = x
self.maxY = y
self.maxZ = z
size = size-6
if (size == x*y*z): format = 8
elif (size == 2*x*y*z): format = 16
elif (size == 4*x*y*z): format = 32
if (format == 32):
for i in range(x*y*z):
self.voxel[i] = float(struct.unpack(self.__struct4byte__, f.read(4) )[0])
elif (format == 16):
for i in range(x*y*z):
self.voxel[i] = float(struct.unpack(self.__struct2byte__, f.read(2) )[0])
elif (format == 8):
for i in range(x*y*z):
self.voxel[i] = float(struct.unpack(self.__struct1byte__, f.read(1) )[0])
return self
#### Local classes not intended for user use
def __rip__(self, minX, maxX, minY, maxY, minZ, maxZ):
sizeX = maxX-minX+1
sizeY = maxY-minY+1
sizeZ = maxZ-minZ+1
tmpV = self.__create__(sizeX, sizeY, sizeZ)
for x in range(sizeX):
for y in range(sizeY):
for z in range(sizeZ):
# Check X
if ((minX + x) < 0):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
elif ((minX + x) > self.sizeX()-1):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
# Check Y
elif ((minY + y) < 0):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
elif ((minY + y) > self.sizeY()-1):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
# Check Z
elif ((minZ + z) < 0):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
elif ((minZ + z) > self.sizeZ()-1):
tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
else:
tmpV[(z*sizeZ+y)*sizeY+x] = self.get(minX+x,minY+y,minZ+z)
return tmpV
def __samesize__(self, indf3):
if (self.sizeX() != indf3.sizeX()): return 0
if (self.sizeY() != indf3.sizeY()): return 0
if (self.sizeZ() != indf3.sizeZ()): return 0
return 1
def __voxa__(self, x, y, z):
return ((z*self.sizeY()+y)*self.sizeX()+x)
def __create__(self, x, y, z, atype='0', init=1):
if (atype == '0'):
tmp = self.__arraytype__
else:
tmp = atype
if (init == 1):
if tmp in ('f','d'):
voxel = array.array(tmp, [0.0 for i in range(x*y*z)])
else:
voxel = array.array(tmp, [0 for i in range(x*y*z)])
else:
voxel = array.array(tmp)
return voxel
def __toInteger__(self, scale, rescale=1):
if (scale < pow(2,8)): # 8-bit
tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array1byte__)
elif (scale < pow(2,16)): # 16-bit
tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array2byte__)
else: # 32-bit
tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array4byte__)
maxVal = self.max()
print(scale)
for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
if (rescale == 1):
tmp[i] = max(0,int(round(scale*self.voxel[i]/maxVal)))
else:
tmp[i] = max(0,min(scale,int(round(self.voxel[i]))))
return tmp
# -=-=-=- End df3 Class -=-=-=-
##########DEFAULT EXAMPLES
# if __name__ == '__main__':
# localX = 80
# localY = 90
# localZ = 100
## Generate an output
# temp = df3(localX, localY, localZ)
# for i in range(localX):
# for j in range(localY):
# for k in range(localZ):
# if (i >= (localX/2)):
# temp.set(i, j, k, 1.0)
# temp.exportDF3('temp.df3', 16)
###############################################################################
## Import
# temp2 = df3().importDF3('temp.df3')
# temp2.mult(1/temp2.max())
# if (temp.compare(temp2) == 0): print("DF3's Do Not Match")
###############################################################################
# ChangeLog
# ---------
# 08/09/05: 0.20 released
# + Change internal representation to floating point
# + Rewrite import/export for speed
# + Convert from 3-d list structure to Array class for data storage
# + Add element access, scalar, and vector functions
# 07/13/05: 0.10 released
###############################################################################