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Brecht Van Lommel authored
Differential Revision: https://developer.blender.org/D3746
Brecht Van Lommel authoredDifferential Revision: https://developer.blender.org/D3746
df3.py 11.29 KiB
################################################################################
#
# 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
#
# 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())
## Compare
# print(temp2.size())
# 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
###############################################################################