def _calcInteriorAndExteriorCellIDs(self):
try:
import sets
self.exteriorCellIDs = sets.Set(self.faceCellIDs[0, self.getExteriorFaces().getValue()])
self.interiorCellIDs = list(sets.Set(range(self.numberOfCells)) - self.exteriorCellIDs)
self.exteriorCellIDs = list(self.exteriorCellIDs)
except:
self.exteriorCellIDs = self.faceCellIDs[0, self.getExteriorFaces().getValue()]
tmp = numerix.zeros(self.numberOfCells)
numerix.put(tmp, self.exteriorCellIDs, numerix.ones(len(self.exteriorCellIDs)))
self.exteriorCellIDs = numerix.nonzero(tmp)
self.interiorCellIDs = numerix.nonzero(numerix.logical_not(tmp))
def _calcInteriorAndExteriorCellIDs(self):
try:
import sys
if sys.version_info < (2, 6):
from sets import Set as set
exteriorCellIDs = set(self.faceCellIDs[0, self._exteriorFaces.value])
interiorCellIDs = list(set(range(self.numberOfCells)) - self._exteriorCellIDs)
exteriorCellIDs = list(self._exteriorCellIDs)
except:
exteriorCellIDs = self.faceCellIDs[0, self._exteriorFaces.value]
tmp = numerix.zeros(self.numberOfCells, 'l')
numerix.put(tmp, exteriorCellIDs, numerix.ones(len(exteriorCellIDs), 'l'))
exteriorCellIDs = numerix.nonzero(tmp)
interiorCellIDs = numerix.nonzero(numerix.logical_not(tmp))
return interiorCellIDs, exteriorCellIDs
def _getNonOrthogonality(self):
exteriorFaceArray = numerix.zeros((self.faceCellIDs.shape[1],))
numerix.put(exteriorFaceArray, numerix.nonzero(self.getExteriorFaces()), 1)
unmaskedFaceCellIDs = MA.filled(self.faceCellIDs, 0) ## what we put in for the "fill" doesn't matter because only exterior faces have anything masked, and exterior faces have their displacement vectors set to zero.
## if it's an exterior face, make the "displacement vector" equal to zero so the cross product will be zero.
faceDisplacementVectors = numerix.where(numerix.array(zip(exteriorFaceArray, exteriorFaceArray)), 0.0, numerix.take(self._getCellCenters().swapaxes(0,1), unmaskedFaceCellIDs[1, :]) - numerix.take(self._getCellCenters().swapaxes(0,1), unmaskedFaceCellIDs[0, :])).swapaxes(0,1)
faceCrossProducts = (faceDisplacementVectors[0, :] * self.faceNormals[1, :]) - (faceDisplacementVectors[1, :] * self.faceNormals[0, :])
faceDisplacementVectorLengths = numerix.maximum(((faceDisplacementVectors[0, :] ** 2) + (faceDisplacementVectors[1, :] ** 2)) ** 0.5, 1.e-100)
faceWeightedNonOrthogonalities = abs(faceCrossProducts / faceDisplacementVectorLengths) * self.faceAreas
cellFaceWeightedNonOrthogonalities = numerix.take(faceWeightedNonOrthogonalities, self.cellFaceIDs)
cellFaceAreas = numerix.take(self.faceAreas, self.cellFaceIDs)
cellTotalWeightedValues = numerix.add.reduce(cellFaceWeightedNonOrthogonalities, axis = 0)
cellTotalFaceAreas = numerix.add.reduce(cellFaceAreas, axis = 0)
return (cellTotalWeightedValues / cellTotalFaceAreas)
def _nonOrthogonality(self):
exteriorFaceArray = numerix.zeros((self.faceCellIDs.shape[1], ), 'l')
numerix.put(exteriorFaceArray, numerix.nonzero(self.exteriorFaces), 1)
unmaskedFaceCellIDs = MA.filled(self.faceCellIDs, 0)
# what we put in for the "fill" doesn't matter because only exterior
# faces have anything masked, and exterior faces have their displacement
# vectors set to zero.
#
# if it's an exterior face, make the "displacement vector" equal to zero
# so the cross product will be zero.
faceDisplacementVectors = \
numerix.where(numerix.array(zip(exteriorFaceArray, exteriorFaceArray)),
0.0,
numerix.take(self._scaledCellCenters.swapaxes(0,1),
unmaskedFaceCellIDs[1, :]) \
- numerix.take(self._scaledCellCenters.swapaxes(0,1),
unmaskedFaceCellIDs[0, :]))
faceDisplacementVectors = faceDisplacementVectors.swapaxes(0, 1)
faceCrossProducts = (faceDisplacementVectors[0, :] * self.faceNormals[1,:]) \
- (faceDisplacementVectors[1, :] * self.faceNormals[0, :])
faceDisplacementVectorLengths = numerix.maximum(((faceDisplacementVectors[0, :] ** 2) \
+ (faceDisplacementVectors[1, :] ** 2)) ** 0.5, 1.e-100)
faceWeightedNonOrthogonalities = abs(
faceCrossProducts /
faceDisplacementVectorLengths) * self._faceAreas
cellFaceWeightedNonOrthogonalities = numerix.take(
faceWeightedNonOrthogonalities, self.cellFaceIDs)
cellFaceAreas = numerix.take(self._faceAreas, self.cellFaceIDs)
cellTotalWeightedValues = numerix.add.reduce(
cellFaceWeightedNonOrthogonalities, axis=0)
cellTotalFaceAreas = numerix.add.reduce(cellFaceAreas, axis=0)
return (cellTotalWeightedValues / cellTotalFaceAreas)
def _calcFaceCellIDs(self):
array = MA.array(MA.indices(self.cellFaceIDs.shape, 'l')[1],
mask=MA.getmask(self.cellFaceIDs))
faceCellIDs = MA.zeros((2, self.numberOfFaces), 'l')
## Nasty bug: MA.put(arr, ids, values) fills its ids and
## values arguments when masked! This was not the behavior
## that was assumed when used below. It was only working
## because the old fill value was 0 and the first element of
## the array needed to be 0 since the cell's face was
## 0. numerix.put() has been changed to deal with this
## properly.
## MA.put(firstRow, cellFaceIDsFlat[::-1], array[::-1])
## MA.put(secondRow, cellFaceIDsFlat, array)
firstRow = faceCellIDs[0]
secondRow = faceCellIDs[1]
numerix.put(firstRow, self.cellFaceIDs[::-1, ::-1], array[::-1, ::-1])
numerix.put(secondRow, self.cellFaceIDs, array)
mask = ((False, ) * self.numberOfFaces, (firstRow == secondRow))
return MA.sort(MA.array(faceCellIDs, mask=mask), axis=0)
def _calcFaceCellIDs(self):
array = MA.array(MA.indices(self.cellFaceIDs.shape, 'l')[1],
mask=MA.getmask(self.cellFaceIDs))
self.faceCellIDs = MA.zeros((2, self.numberOfFaces), 'l')
## Nasty bug: MA.put(arr, ids, values) fills its ids and
## values arguments when masked! This was not the behavior
## that was assumed when used below. It was only working
## because the old fill value was 0 and the first element of
## the array needed to be 0 since the cell's face was
## 0. numerix.put() has been changed to deal with this
## properly.
## MA.put(firstRow, cellFaceIDsFlat[::-1], array[::-1])
## MA.put(secondRow, cellFaceIDsFlat, array)
firstRow = self.faceCellIDs[0]
secondRow = self.faceCellIDs[1]
numerix.put(firstRow, self.cellFaceIDs[::-1,::-1], array[::-1,::-1])
numerix.put(secondRow, self.cellFaceIDs, array)
mask = ((False,) * self.numberOfFaces, (firstRow == secondRow))
self.faceCellIDs = MA.sort(MA.array(self.faceCellIDs, mask = mask),
axis=0)
def _connectFaces(self, faces0, faces1):
"""
Merge faces on the same mesh. This is used to create periodic
meshes. The first list of faces, `faces1`, will be the faces
that are used to add to the matrix diagonals. The faces in
`faces2` will not be used. They aren't deleted but their
adjacent cells are made to point at `faces1`. The list
`faces2` are not altered, they still remain as members of
exterior faces.
>>> from fipy.meshes.nonUniformGrid2D import NonUniformGrid2D
>>> mesh = NonUniformGrid2D(nx = 2, ny = 2, dx = 1., dy = 1.)
>>> print((mesh.cellFaceIDs == [[0, 1, 2, 3],
... [7, 8, 10, 11],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()) # doctest: +PROCESSOR_0
True
>>> mesh._connectFaces(numerix.nonzero(mesh.facesLeft), numerix.nonzero(mesh.facesRight))
>>> print((mesh.cellFaceIDs == [[0, 1, 2, 3],
... [7, 6, 10, 9],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()) # doctest: +PROCESSOR_0
True
"""
## check for errors
## check that faces are members of exterior faces
from fipy.variables.faceVariable import FaceVariable
faces = FaceVariable(mesh=self, value=False)
faces[faces0] = True
faces[faces1] = True
assert (faces | self.exteriorFaces == self.exteriorFaces).all()
## following assert checks number of faces are equal, normals are opposite and areas are the same
assert numerix.allclose(numerix.take(self._areaProjections, faces0, axis=1),
numerix.take(-self._areaProjections, faces1, axis=1))
## extract the adjacent cells for both sets of faces
faceCellIDs0 = self.faceCellIDs[0]
faceCellIDs1 = self.faceCellIDs[1]
## set the new adjacent cells for `faces0`
MA.put(faceCellIDs1, faces0, MA.take(faceCellIDs0, faces0))
MA.put(faceCellIDs0, faces0, MA.take(faceCellIDs0, faces1))
self.faceCellIDs[0] = faceCellIDs0
self.faceCellIDs[1] = faceCellIDs1
## extract the face to cell distances for both sets of faces
faceToCellDistances0 = self._faceToCellDistances[0]
faceToCellDistances1 = self._faceToCellDistances[1]
## set the new faceToCellDistances for `faces0`
MA.put(faceToCellDistances1, faces0, MA.take(faceToCellDistances0, faces0))
MA.put(faceToCellDistances0, faces0, MA.take(faceToCellDistances0, faces1))
self._faceToCellDistances[0] = faceToCellDistances0
self._faceToCellDistances[1] = faceToCellDistances1
## calculate new cell distances and add them to faces0
numerix.put(self._cellDistances, faces0, MA.take(faceToCellDistances0 + faceToCellDistances1, faces0))
## change the direction of the face normals for faces0
for dim in range(self.dim):
faceNormals = self.faceNormals[dim].copy()
numerix.put(faceNormals, faces0, MA.take(faceNormals, faces1))
self.faceNormals[dim] = faceNormals
## Cells that are adjacent to faces1 are changed to point at faces0
## get the cells adjacent to faces1
faceCellIDs = MA.take(self.faceCellIDs[0], faces1)
## get all the adjacent faces for those particular cells
cellFaceIDs = numerix.take(self.cellFaceIDs, faceCellIDs, axis=1)
for i in range(cellFaceIDs.shape[0]):
## if the faces is a member of faces1 then change the face to point at
## faces0
cellFaceIDs[i] = MA.where(cellFaceIDs[i] == faces1,
faces0,
cellFaceIDs[i])
## add those faces back to the main self.cellFaceIDs
numerix.put(self.cellFaceIDs[i], faceCellIDs, cellFaceIDs[i])
## calculate new topology
self._setTopology()
## calculate new geometry
self._handleFaceConnection()
self.scale = self.scale['length']
def _getStructure(self):
##maxX = self.distanceVar.mesh.faceCenters[0].max()
##minX = self.distanceVar.mesh.faceCenters[0].min()
IDs = numerix.nonzero(self.distanceVar._cellInterfaceFlag)[0]
coordinates = numerix.take(numerix.array(self.distanceVar.mesh.cellCenters).swapaxes(0, 1), IDs)
coordinates -= numerix.take(numerix.array(self.distanceVar.grad * self.distanceVar).swapaxes(0, 1), IDs)
coordinates *= self.zoomFactor
shiftedCoords = coordinates.copy()
shiftedCoords[:, 0] = -coordinates[:, 0] ##+ (maxX - minX)
coordinates = numerix.concatenate((coordinates, shiftedCoords))
from .lines import _getOrderedLines
lines = _getOrderedLines(list(range(2 * len(IDs))), coordinates, thresholdDistance = self.distanceVar.mesh._cellDistances.min() * 10)
data = numerix.take(self.surfactantVar, IDs)
data = numerix.concatenate((data, data))
tmpIDs = numerix.nonzero(data > 0.0001)[0]
if len(tmpIDs) > 0:
val = numerix.take(data, tmpIDs).min()
else:
val = 0.0001
data = numerix.where(data < 0.0001,
val,
data)
for line in lines:
if len(line) > 2:
for smooth in range(self.smooth):
for arr in (coordinates, data):
tmp = numerix.take(arr, line)
tmp[1:-1] = tmp[2:] * 0.25 + tmp[:-2] * 0.25 + tmp[1:-1] * 0.5
if len(arr.shape) > 1:
for i in range(len(arr[0])):
arrI = arr[:, i].copy()
numerix.put(arrI, line, tmp[:, i])
arr[:, i] = arrI
else:
numerix.put(arrI, line, tmp)
name = self.title
name = name.strip()
if name == '':
name = None
coords = numerix.zeros((coordinates.shape[0], 3), 'd')
coords[:, :coordinates.shape[1]] = coordinates
import pyvtk
## making lists as pyvtk doesn't know what to do with numpy arrays
coords = list(coords)
coords = [[float(coord[0]), float(coord[1]), float(coord[2])] for coord in coords]
data = list(data)
data = [float(item) for item in data]
return (pyvtk.UnstructuredGrid(points = coords,
poly_line = lines),
pyvtk.PointData(pyvtk.Scalars(data, name = name)))
def _getStructure(self):
##maxX = self.distanceVar.mesh.faceCenters[0].max()
##minX = self.distanceVar.mesh.faceCenters[0].min()
IDs = numerix.nonzero(self.distanceVar._cellInterfaceFlag)[0]
coordinates = numerix.take(
numerix.array(self.distanceVar.mesh.cellCenters).swapaxes(0, 1),
IDs)
coordinates -= numerix.take(
numerix.array(self.distanceVar.grad * self.distanceVar).swapaxes(
0, 1), IDs)
coordinates *= self.zoomFactor
shiftedCoords = coordinates.copy()
shiftedCoords[:, 0] = -coordinates[:, 0] ##+ (maxX - minX)
coordinates = numerix.concatenate((coordinates, shiftedCoords))
from lines import _getOrderedLines
lines = _getOrderedLines(
range(2 * len(IDs)),
coordinates,
thresholdDistance=self.distanceVar.mesh._cellDistances.min() * 10)
data = numerix.take(self.surfactantVar, IDs)
data = numerix.concatenate((data, data))
tmpIDs = numerix.nonzero(data > 0.0001)[0]
if len(tmpIDs) > 0:
val = numerix.take(data, tmpIDs).min()
else:
val = 0.0001
data = numerix.where(data < 0.0001, val, data)
for line in lines:
if len(line) > 2:
for smooth in range(self.smooth):
for arr in (coordinates, data):
tmp = numerix.take(arr, line)
tmp[1:-1] = tmp[2:] * 0.25 + tmp[:-2] * 0.25 + tmp[
1:-1] * 0.5
if len(arr.shape) > 1:
for i in range(len(arr[0])):
arrI = arr[:, i].copy()
numerix.put(arrI, line, tmp[:, i])
arr[:, i] = arrI
else:
numerix.put(arrI, line, tmp)
name = self.title
name = name.strip()
if name == '':
name = None
coords = numerix.zeros((coordinates.shape[0], 3), 'd')
coords[:, :coordinates.shape[1]] = coordinates
import pyvtk
## making lists as pyvtk doesn't know what to do with numpy arrays
coords = list(coords)
coords = map(
lambda coord: [float(coord[0]),
float(coord[1]),
float(coord[2])], coords)
data = list(data)
data = map(lambda item: float(item), data)
return (pyvtk.UnstructuredGrid(points=coords, poly_line=lines),
pyvtk.PointData(pyvtk.Scalars(data, name=name)))
def putIntoCellVariable(c, C):
nxyz = C[0].shape[0]
for i in range(len(C)):
numerix.put(C[i], np.arange(nxyz), c[i * nxyz:(i + 1) * nxyz])
return C
def _connectFaces(self, faces0, faces1):
"""
Merge faces on the same mesh. This is used to create periodic
meshes. The first list of faces, `faces1`, will be the faces
that are used to add to the matrix diagonals. The faces in
`faces2` will not be used. They aren't deleted but their
adjacent cells are made to point at `faces1`. The list
`faces2` are not altered, they still remain as members of
exterior faces.
>>> from fipy.meshes.numMesh.grid2D import Grid2D
>>> mesh = Grid2D(nx = 2, ny = 2, dx = 1., dy = 1.)
>>> from fipy.tools import parallel
>>> print parallel.procID != 0 or (mesh._getCellFaceIDs() == [[0, 1, 2, 3],
... [7, 8, 10, 11],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()
True
>>> mesh._connectFaces(numerix.nonzero(mesh.getFacesLeft()), numerix.nonzero(mesh.getFacesRight()))
>>> print parallel.procID != 0 or (mesh._getCellFaceIDs() == [[0, 1, 2, 3],
... [7, 6, 10, 9],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()
True
"""
## check for errors
## check that faces are members of exterior faces
from fipy.variables.faceVariable import FaceVariable
faces = FaceVariable(mesh=self, value=False)
faces[faces0] = True
faces[faces1] = True
assert (faces | self.getExteriorFaces() == self.getExteriorFaces()).all()
## following assert checks number of faces are equal, normals are opposite and areas are the same
assert numerix.alltrue(numerix.take(self.areaProjections, faces0, axis=1)
== numerix.take(-self.areaProjections, faces1, axis=1))
## extract the adjacent cells for both sets of faces
faceCellIDs0 = self.faceCellIDs[0]
faceCellIDs1 = self.faceCellIDs[1]
## set the new adjacent cells for `faces0`
MA.put(faceCellIDs1, faces0, MA.take(faceCellIDs0, faces0))
MA.put(faceCellIDs0, faces0, MA.take(faceCellIDs0, faces1))
self.faceCellIDs[0] = faceCellIDs0
self.faceCellIDs[1] = faceCellIDs1
## extract the face to cell distances for both sets of faces
faceToCellDistances0 = self.faceToCellDistances[0]
faceToCellDistances1 = self.faceToCellDistances[1]
## set the new faceToCellDistances for `faces0`
MA.put(faceToCellDistances1, faces0, MA.take(faceToCellDistances0, faces0))
MA.put(faceToCellDistances0, faces0, MA.take(faceToCellDistances0, faces1))
self.faceToCellDistances[0] = faceToCellDistances0
self.faceToCellDistances[1] = faceToCellDistances1
## calculate new cell distances and add them to faces0
numerix.put(self.cellDistances, faces0, MA.take(faceToCellDistances0 + faceToCellDistances1, faces0))
## change the direction of the face normals for faces0
for dim in range(self.getDim()):
faceNormals = self.faceNormals[dim].copy()
numerix.put(faceNormals, faces0, MA.take(faceNormals, faces1))
self.faceNormals[dim] = faceNormals
## Cells that are adjacent to faces1 are changed to point at faces0
## get the cells adjacent to faces1
faceCellIDs = MA.take(self.faceCellIDs[0], faces1)
## get all the adjacent faces for those particular cells
cellFaceIDs = numerix.take(self.cellFaceIDs, faceCellIDs, axis=1)
for i in range(cellFaceIDs.shape[0]):
## if the faces is a member of faces1 then change the face to point at
## faces0
cellFaceIDs[i] = MA.where(cellFaceIDs[i] == faces1,
faces0,
cellFaceIDs[i])
## add those faces back to the main self.cellFaceIDs
tmp = self.cellFaceIDs[i]
numerix.put(tmp, faceCellIDs, cellFaceIDs[i])
self.cellFaceIDs[i] = tmp
## calculate new topology
_CommonMesh._calcTopology(self)
## calculate new geometry
self._calcFaceToCellDistanceRatio()
self._calcCellToCellDistances()
self._calcScaledGeometry()
self._calcFaceAspectRatios()
def put(self, indices, value):
if self.value is None:
self.getValue()
numerix.put(self.value, indices, value)
self._markFresh()
def _connectFaces(self, faces0, faces1):
"""
Merge faces on the same mesh. This is used to create periodic
meshes. The first list of faces, `faces1`, will be the faces
that are used to add to the matrix diagonals. The faces in
`faces2` will not be used. They aren't deleted but their
adjacent cells are made to point at `faces1`. The list
`faces2` are not altered, they still remain as members of
exterior faces.
>>> from fipy.meshes.nonUniformGrid2D import NonUniformGrid2D
>>> mesh = NonUniformGrid2D(nx = 2, ny = 2, dx = 1., dy = 1.)
>>> print((mesh.cellFaceIDs == [[0, 1, 2, 3],
... [7, 8, 10, 11],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()) # doctest: +PROCESSOR_0
True
>>> mesh._connectFaces(numerix.nonzero(mesh.facesLeft), numerix.nonzero(mesh.facesRight))
>>> print((mesh.cellFaceIDs == [[0, 1, 2, 3],
... [7, 6, 10, 9],
... [2, 3, 4, 5],
... [6, 7, 9, 10]]).flatten().all()) # doctest: +PROCESSOR_0
True
"""
## check for errors
## check that faces are members of exterior faces
from fipy.variables.faceVariable import FaceVariable
faces = FaceVariable(mesh=self, value=False)
faces[faces0] = True
faces[faces1] = True
assert (faces | self.exteriorFaces == self.exteriorFaces).all()
## following assert checks number of faces are equal, normals are opposite and areas are the same
assert numerix.allclose(numerix.take(self._areaProjections, faces0, axis=1),
numerix.take(-self._areaProjections, faces1, axis=1))
## extract the adjacent cells for both sets of faces
faceCellIDs0 = self.faceCellIDs[0]
faceCellIDs1 = self.faceCellIDs[1]
## set the new adjacent cells for `faces0`
MA.put(faceCellIDs1, faces0, MA.take(faceCellIDs0, faces0))
MA.put(faceCellIDs0, faces0, MA.take(faceCellIDs0, faces1))
self.faceCellIDs[0] = faceCellIDs0
self.faceCellIDs[1] = faceCellIDs1
## extract the face to cell distances for both sets of faces
faceToCellDistances0 = self._faceToCellDistances[0]
faceToCellDistances1 = self._faceToCellDistances[1]
## set the new faceToCellDistances for `faces0`
MA.put(faceToCellDistances1, faces0, MA.take(faceToCellDistances0, faces0))
MA.put(faceToCellDistances0, faces0, MA.take(faceToCellDistances0, faces1))
self._faceToCellDistances[0] = faceToCellDistances0
self._faceToCellDistances[1] = faceToCellDistances1
## calculate new cell distances and add them to faces0
numerix.put(self._cellDistances, faces0, MA.take(faceToCellDistances0 + faceToCellDistances1, faces0))
## change the direction of the face normals for faces0
for dim in range(self.dim):
faceNormals = self.faceNormals[dim].copy()
numerix.put(faceNormals, faces0, MA.take(faceNormals, faces1))
self.faceNormals[dim] = faceNormals
## Cells that are adjacent to faces1 are changed to point at faces0
## get the cells adjacent to faces1
faceCellIDs = MA.take(self.faceCellIDs[0], faces1)
## get all the adjacent faces for those particular cells
cellFaceIDs = numerix.take(self.cellFaceIDs, faceCellIDs, axis=1)
for i in range(cellFaceIDs.shape[0]):
## if the faces is a member of faces1 then change the face to point at
## faces0
cellFaceIDs[i] = MA.where(cellFaceIDs[i] == faces1,
faces0,
cellFaceIDs[i])
## add those faces back to the main self.cellFaceIDs
numerix.put(self.cellFaceIDs[i], faceCellIDs, cellFaceIDs[i])
## calculate new topology
self._setTopology()
## calculate new geometry
self._handleFaceConnection()
self.scale = self.scale['length']
