389 lines
11 KiB
Python
389 lines
11 KiB
Python
################################################################################
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#
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# df3.py
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#
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# Copyright (C) 2005 Mike Kost <contact@povray.tashcorp.net>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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#
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################################################################################
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#
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# Creation functions
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# __init__(x=1, y=1, z=1) : default constructor
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# clone(indf3) : make this df3 look like indf3
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#
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# Info functions
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# sizeX(): returns X dimension
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# sizeY(): returns Y dimension
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# sizeZ(): returns Z dimension
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#
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# Scalar functions
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# mult():
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# add():
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# max(): returns highest voxel value in df3
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# min(): returns lowest voxel value in df3
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#
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# Vector functions
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#
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# Import/Export functions
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# exportDF3():
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# importDF3():
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#
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################################################################################
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import struct
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import os
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import stat
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import array
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import sys
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# -+-+-+- Start df3 Class -+-+-+-
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class df3:
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__version__ = '0.2'
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__arraytype__ = 'f'
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__struct4byte__ = '>I'
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__struct2byte__ = '>H'
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__struct2byte3__ = '>HHH'
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__struct1byte__ = '>B'
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__array4byte__ = 'I'
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__array2byte__ = 'H'
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__array1byte__ = 'B'
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def __init__(self, x=1, y=1, z=1):
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self.maxX = x
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self.maxY = y
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self.maxZ = z
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self.voxel = self.__create__(x, y, z)
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def clone(self, indf3):
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self.voxel = array.array(self.__arraytype__)
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for i in range(indf3.sizeX()*indf3.sizeY()*indf3.sizeZ()):
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self.voxel[i] = indf3.voxel[i]
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return self
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#### Info Functions
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def sizeX(self):
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return self.maxX
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def sizeY(self):
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return self.maxY
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def sizeZ(self):
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return self.maxZ
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def size(self):
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tmp = []
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tmp.append(self.sizeX())
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tmp.append(self.sizeY())
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tmp.append(self.sizeZ())
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return tmp
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#### Voxel Access Functions
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def get(self, x, y, z):
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return self.voxel[self.__voxa__(x,y,z)]
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def getB(self, x, y, z):
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if (x > self.sizeX() or x < 0): return 0
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if (y > self.sizeX() or y < 0): return 0
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if (z > self.sizeX() or z < 0): return 0
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return self.voxel[self.__voxa__(x,y,z)]
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def set(self, x, y, z, val):
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self.voxel[self.__voxa__(x,y,z)] = val
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def setB(self, x, y, z, val):
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if (x > self.sizeX() or x < 0): return
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if (y > self.sizeX() or y < 0): return
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if (z > self.sizeX() or z < 0): return
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self.voxel[self.__voxa__(x,y,z)] = val
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#### Scalar Functions
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def mult(self, val):
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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self.voxel[i] = self.voxel[i] * val
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return self
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def add(self, val):
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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self.voxel[i] = self.voxel[i] + val
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return self
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def max(self):
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tmp = self.voxel[0]
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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if (self.voxel[i] > tmp):
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tmp = self.voxel[i]
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return tmp
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def min(self):
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tmp = self.voxel[0]
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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if (self.voxel[i] < tmp):
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tmp = self.voxel[i]
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return tmp
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#### Vector Functions
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def compare(self, indf3):
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if (self.__samesize__(indf3) == 0): return 0
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if (self.voxel == indf3.voxel):
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return 1
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return 0
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def multV(self, indf3):
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if (self.__samesize__(indf3) == 0):
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print("Cannot multiply voxels - not same size")
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return
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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self.voxel[i] = self.voxel[i]*indf3.voxel[i]
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return self
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def addV(self, indf3):
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if (self.__samesize__(indf3) == 0):
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print("Cannot add voxels - not same size")
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return
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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self.voxel[i] = self.voxel[i]+indf3.voxel[i]
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return self
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def convolveV(self, filt):
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fx = filt.sizeX()
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fy = filt.sizeY()
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fz = filt.sizeZ()
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if (fx % 2 != 1):
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print("Incompatible filter - must be odd number of X")
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return self
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if (fy % 2 != 1):
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print("Incompatible filter - must be odd number of Y")
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return self
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if (fz % 2 != 1):
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print("Incompatible filter - must be odd number of Z")
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return self
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fdx = (fx-1)/2
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fdy = (fy-1)/2
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fdz = (fz-1)/2
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flen = fx*fy*fz
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newV = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ());
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for x in range(self.sizeX()):
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for y in range(self.sizeY()):
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for z in range(self.sizeZ()):
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rip = self.__rip__(x-fdx, x+fdx, y-fdy, y+fdy, z-fdz, z+fdz)
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tmp = 0.0
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for i in range(flen):
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tmp += rip[i]*filt.voxel[i]
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newV[self.__voxa__(x,y,z)] = tmp
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self.voxel = newV
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return self
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#### Import/Export Functions
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def exportDF3(self, file, depth=8, rescale=1):
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x = self.sizeX()
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y = self.sizeY()
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z = self.sizeZ()
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try:
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f = open(file, 'wb');
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except:
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print("Could not open " + file + " for write");
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return
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f.write(struct.pack(self.__struct2byte3__, x, y, z));
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tmp = self.__toInteger__(pow(2,depth)-1, rescale)
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if (depth > 16): # 32-bit
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for i in range( x*y*z ):
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f.write(struct.pack(self.__struct4byte__, tmp[i]))
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elif (depth > 8): # 16-bit
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for i in range( x*y*z ):
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f.write(struct.pack(self.__struct2byte__, tmp[i]))
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else:
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for i in range( x*y*z ):
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f.write(struct.pack(self.__struct1byte__, tmp[i]))
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def importDF3(self, file, scale=1):
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try:
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f = open(file, 'rb');
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size = os.stat(file)[stat.ST_SIZE]
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except:
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print("Could not open " + file + " for read");
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return []
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(x, y, z) = struct.unpack(self.__struct2byte3__, f.read(6) )
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self.voxel = self.__create__(x, y, z)
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self.maxX = x
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self.maxY = y
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self.maxZ = z
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size = size-6
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if (size == x*y*z): format = 8
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elif (size == 2*x*y*z): format = 16
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elif (size == 4*x*y*z): format = 32
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if (format == 32):
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for i in range(x*y*z):
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self.voxel[i] = float(struct.unpack(self.__struct4byte__, f.read(4) )[0])
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elif (format == 16):
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for i in range(x*y*z):
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self.voxel[i] = float(struct.unpack(self.__struct2byte__, f.read(2) )[0])
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elif (format == 8):
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for i in range(x*y*z):
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self.voxel[i] = float(struct.unpack(self.__struct1byte__, f.read(1) )[0])
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return self
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#### Local classes not intended for user use
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def __rip__(self, minX, maxX, minY, maxY, minZ, maxZ):
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sizeX = maxX-minX+1
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sizeY = maxY-minY+1
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sizeZ = maxZ-minZ+1
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tmpV = self.__create__(sizeX, sizeY, sizeZ)
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for x in range(sizeX):
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for y in range(sizeY):
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for z in range(sizeZ):
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# Check X
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if ((minX + x) < 0):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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elif ((minX + x) > self.sizeX()-1):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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# Check Y
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elif ((minY + y) < 0):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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elif ((minY + y) > self.sizeY()-1):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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# Check Z
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elif ((minZ + z) < 0):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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elif ((minZ + z) > self.sizeZ()-1):
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tmpV[(z*sizeZ+y)*sizeY+x] = 0.0
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else:
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tmpV[(z*sizeZ+y)*sizeY+x] = self.get(minX+x,minY+y,minZ+z)
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return tmpV
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def __samesize__(self, indf3):
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if (self.sizeX() != indf3.sizeX()): return 0
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if (self.sizeY() != indf3.sizeY()): return 0
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if (self.sizeZ() != indf3.sizeZ()): return 0
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return 1
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def __voxa__(self, x, y, z):
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return ((z*self.sizeY()+y)*self.sizeX()+x)
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def __create__(self, x, y, z, atype='0', init=1):
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if (atype == '0'):
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tmp = self.__arraytype__
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else:
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tmp = atype
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if (init == 1):
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if tmp in ('f','d'):
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voxel = array.array(tmp, [0.0 for i in range(x*y*z)])
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else:
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voxel = array.array(tmp, [0 for i in range(x*y*z)])
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else:
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voxel = array.array(tmp)
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return voxel
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def __toInteger__(self, scale, rescale=1):
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if (scale < pow(2,8)): # 8-bit
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tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array1byte__)
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elif (scale < pow(2,16)): # 16-bit
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tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array2byte__)
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else: # 32-bit
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tmp = self.__create__(self.sizeX(), self.sizeY(), self.sizeZ(), self.__array4byte__)
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maxVal = self.max()
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print(scale)
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for i in range(self.sizeX()*self.sizeY()*self.sizeZ()):
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if (rescale == 1):
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tmp[i] = max(0,int(round(scale*self.voxel[i]/maxVal)))
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else:
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tmp[i] = max(0,min(scale,int(round(self.voxel[i]))))
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return tmp
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# -=-=-=- End df3 Class -=-=-=-
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##########DEFAULT EXAMPLES
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# if __name__ == '__main__':
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# localX = 80
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# localY = 90
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# localZ = 100
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## Generate an output
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# temp = df3(localX, localY, localZ)
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# for i in range(localX):
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# for j in range(localY):
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# for k in range(localZ):
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# if (i >= (localX/2)):
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# temp.set(i, j, k, 1.0)
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# temp.exportDF3('temp.df3', 16)
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###############################################################################
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## Import
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# temp2 = df3().importDF3('temp.df3')
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# temp2.mult(1/temp2.max())
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## Compare
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# print(temp2.size())
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# if (temp.compare(temp2) == 0): print("DF3's Do Not Match")
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###############################################################################
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# ChangeLog
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# ---------
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# 08/09/05: 0.20 released
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# + Change internal representation to floating point
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# + Rewrite import/export for speed
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# + Convert from 3-d list structure to Array class for data storage
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# + Add element access, scalar, and vector functions
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# 07/13/05: 0.10 released
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###############################################################################
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