def time_update(self,
ts,
equations,
mode='normal',
problem=None,
verbose=True):
"""
Update material parameters for given time, problem, and equations.
Parameters
----------
ts : TimeStepper instance
The time stepper.
equations : Equations instance
The equations using the materials.
mode : 'normal', 'update' or 'force'
The update mode, see :func:`Material.time_update()`.
problem : Problem instance, optional
The problem that can be passed to user functions as a context.
verbose : bool
If False, reduce verbosity.
"""
if verbose: output('updating materials...')
timer = Timer(start=True)
for mat in self:
if verbose: output(' ', mat.name)
mat.time_update(ts, equations, mode=mode, problem=problem)
if verbose: output('...done in %.2f s' % timer.stop())
def presolve(self, mtx):
"""Prepare A^{-1} B^T for the Schur complement."""
mtx_a = mtx['A']
mtx_bt = mtx['BT']
output('full A size: %.3f MB' % (8.0 * nm.prod(mtx_a.shape) / 1e6))
output('full B size: %.3f MB' % (8.0 * nm.prod(mtx_bt.shape) / 1e6))
ls = Solver.any_from_conf(self.problem.ls_conf +
Struct(use_presolve=True),
mtx=mtx_a)
if self.mode == 'explicit':
timer = Timer(start=True)
mtx_aibt = nm.zeros(mtx_bt.shape, dtype=mtx_bt.dtype)
for ic in range(mtx_bt.shape[1]):
mtx_aibt[:, ic] = ls(mtx_bt[:, ic].toarray().squeeze())
output('mtx_aibt: %.2f s' % timer.stop())
action_aibt = MatrixAction.from_array(mtx_aibt)
else:
##
# c: 30.08.2007, r: 13.02.2008
def fun_aibt(vec):
# Fix me for sparse mtx_bt...
rhs = sc.dot(mtx_bt, vec)
out = ls(rhs)
return out
action_aibt = MatrixAction.from_function(
fun_aibt, (mtx_a.shape[0], mtx_bt.shape[1]), nm.float64)
mtx['action_aibt'] = action_aibt
def create_regions(self, region_defs, functions=None, allow_empty=False):
output('creating regions...')
timer = Timer(start=True)
self.reset_regions()
##
# Sort region definitions by dependencies.
graph, name_to_sort_name = get_dependency_graph(region_defs)
sorted_regions = sort_by_dependency(graph)
##
# Define regions.
for name in sorted_regions:
sort_name = name_to_sort_name[name]
rdef = region_defs[sort_name]
region = self.create_region(name,
rdef.select,
kind=rdef.get('kind', 'cell'),
parent=rdef.get('parent', None),
check_parents=False,
extra_options=rdef.get(
'extra_options', None),
functions=functions,
allow_empty=allow_empty)
output(' ', region.name)
output('...done in %.2f s' % timer.stop())
return self.regions
def _petsc_call(self, rhs, x0=None, conf=None, eps_a=None, eps_r=None,
i_max=None, mtx=None, status=None, comm=None,
context=None, **kwargs):
timer = Timer(start=True)
conf = get_default(conf, self.conf)
mtx = get_default(mtx, self.mtx)
status = get_default(status, self.status)
context = get_default(context, self.context)
comm = get_default(comm, self.comm)
mshape = mtx.size if isinstance(mtx, self.petsc.Mat) else mtx.shape
rshape = [rhs.size] if isinstance(rhs, self.petsc.Vec) else rhs.shape
assert_(mshape[0] == mshape[1] == rshape[0])
if x0 is not None:
xshape = [x0.size] if isinstance(x0, self.petsc.Vec) else x0.shape
assert_(xshape[0] == rshape[0])
result = call(self, rhs, x0, conf, eps_a, eps_r, i_max, mtx, status,
comm, context=context, **kwargs)
elapsed = timer.stop()
if status is not None:
status['time'] = elapsed
status['n_iter'] = self.ksp.getIterationNumber()
return result
def _standard_call(self, rhs, x0=None, conf=None, eps_a=None, eps_r=None,
i_max=None, mtx=None, status=None, context=None,
**kwargs):
timer = Timer(start=True)
conf = get_default(conf, self.conf)
mtx = get_default(mtx, self.mtx)
status = get_default(status, self.status)
context = get_default(context, self.context)
assert_(mtx.shape[0] == mtx.shape[1] == rhs.shape[0])
if x0 is not None:
assert_(x0.shape[0] == rhs.shape[0])
result = call(self, rhs, x0, conf, eps_a, eps_r, i_max, mtx, status,
context=context, **kwargs)
if isinstance(result, tuple):
result, n_iter = result
else:
n_iter = -1 # Number of iterations is undefined/unavailable.
elapsed = timer.stop()
if status is not None:
status['time'] = elapsed
status['n_iter'] = n_iter
return result
def _standard_call(self,
mtx_a,
mtx_b=None,
n_eigs=None,
eigenvectors=None,
status=None,
conf=None,
**kwargs):
timer = Timer(start=True)
conf = get_default(conf, self.conf)
mtx_a = get_default(mtx_a, self.mtx_a)
mtx_b = get_default(mtx_b, self.mtx_b)
n_eigs = get_default(n_eigs, self.n_eigs)
eigenvectors = get_default(eigenvectors, self.eigenvectors)
status = get_default(status, self.status)
if n_eigs == 0:
result = self._ret_zero(mtx_a, eigenvectors=eigenvectors)
else:
result = call(self, mtx_a, mtx_b, n_eigs, eigenvectors, status,
conf, **kwargs)
elapsed = timer.stop()
if status is not None:
status['time'] = elapsed
return result
def __call__(self, vec_x0, conf=None, fun=None, fun_grad=None,
lin_solver=None, iter_hook=None, status=None):
if conf is not None:
self.set_method(conf)
else:
conf = self.conf
fun = get_default(fun, self.fun)
status = get_default(status, self.status)
timer = Timer(start=True)
kwargs = {'iter' : conf.i_max,
'alpha' : conf.alpha,
'verbose' : conf.verbose}
if conf.method == 'broyden_generalized':
kwargs.update({'M' : conf.M})
elif conf.method in ['anderson', 'anderson2']:
kwargs.update({'M' : conf.M, 'w0' : conf.w0})
if conf.method in ['anderson', 'anderson2',
'broyden', 'broyden2' , 'newton_krylov']:
kwargs.update({'f_tol' : conf.f_tol })
vec_x = self.solver(fun, vec_x0, **kwargs)
vec_x = nm.asarray(vec_x)
if status is not None:
status['time_stats'] = timer.stop()
return vec_x
def create_conn_graph(self, verbose=True):
"""
Create a graph of mesh connectivity.
Returns
-------
graph : csr_matrix
The mesh connectivity graph as a SciPy CSR matrix.
"""
from sfepy.discrete.common.extmods.cmesh import create_mesh_graph
shape = (self.n_nod, self.n_nod)
output('graph shape:', shape, verbose=verbose)
if nm.prod(shape) == 0:
output('no graph (zero size)!', verbose=verbose)
return None
output('assembling mesh graph...', verbose=verbose)
timer = Timer(start=True)
conn = self.get_conn(self.descs[0])
nnz, prow, icol = create_mesh_graph(shape[0], shape[1],
1, [conn], [conn])
output('...done in %.2f s' % timer.stop(), verbose=verbose)
output('graph nonzeros: %d (%.2e%% fill)' \
% (nnz, float(nnz) / nm.prod(shape)), verbose=verbose)
data = nm.ones((nnz,), dtype=nm.bool)
graph = sp.csr_matrix((data, icol, prow), shape)
return graph
def _standard_call(self,
mtx_m,
mtx_d,
mtx_k,
n_eigs=None,
eigenvectors=None,
status=None,
conf=None,
**kwargs):
timer = Timer(start=True)
conf = get_default(conf, self.conf)
mtx_m = get_default(mtx_m, self.mtx_m)
mtx_d = get_default(mtx_d, self.mtx_d)
mtx_k = get_default(mtx_k, self.mtx_k)
n_eigs = get_default(n_eigs, self.n_eigs)
eigenvectors = get_default(eigenvectors, self.eigenvectors)
status = get_default(status, self.status)
result = call(self, mtx_m, mtx_d, mtx_k, n_eigs, eigenvectors, status,
conf, **kwargs)
elapsed = timer.stop()
if status is not None:
status['time'] = elapsed
return result
def _standard_ts_call(self,
vec0=None,
nls=None,
init_fun=None,
prestep_fun=None,
poststep_fun=None,
status=None,
**kwargs):
timer = Timer(start=True)
nls = get_default(nls, self.nls,
'nonlinear solver has to be specified!')
init_fun = get_default(init_fun, lambda ts, vec0: vec0)
prestep_fun = get_default(prestep_fun, lambda ts, vec: None)
poststep_fun = get_default(poststep_fun, lambda ts, vec: None)
result = call(self,
vec0=vec0,
nls=nls,
init_fun=init_fun,
prestep_fun=prestep_fun,
poststep_fun=poststep_fun,
status=status,
**kwargs)
elapsed = timer.stop()
if status is not None:
status['time'] = elapsed
status['n_step'] = self.ts.n_step
return result
def from_file(filename=None,
io='auto',
prefix_dir=None,
omit_facets=False,
file_format=None):
"""
Read a mesh from a file.
Parameters
----------
filename : string or function or MeshIO instance or Mesh instance
The name of file to read the mesh from. For convenience, a
mesh creation function or a MeshIO instance or directly a Mesh
instance can be passed in place of the file name.
io : *MeshIO instance
Passing *MeshIO instance has precedence over filename.
prefix_dir : str
If not None, the filename is relative to that directory.
omit_facets : bool
If True, do not read cells of lower dimension than the space
dimension (faces and/or edges). Only some MeshIO subclasses
support this!
"""
if isinstance(filename, Mesh):
return filename
if io == 'auto':
if filename is None:
output('filename or io must be specified!')
raise ValueError
else:
io = MeshIO.any_from_filename(filename,
prefix_dir=prefix_dir,
file_format=file_format)
output('reading mesh (%s)...' % io.filename)
timer = Timer(start=True)
trunk = io.get_filename_trunk()
mesh = Mesh(trunk)
mesh = io.read(mesh, omit_facets=omit_facets)
output('...done in %.2f s' % timer.stop())
mesh._set_shape_info()
return mesh
def __call__(self, volume=None, problem=None, data=None):
problem = get_default(problem, self.problem)
opts = self.app_options
evp, dv_info = [data[ii] for ii in self.requires]
output('computing eigenmomenta...')
if opts.transform is not None:
fun = problem.conf.get_function(opts.transform[0])
def wrap_transform(vec, shape):
return fun(vec, shape, *opts.eig_vector_transform[1:])
else:
wrap_transform = None
timer = Timer(start=True)
eigenmomenta = compute_eigenmomenta(self.expression, opts.var_name,
problem, evp.eig_vectors,
wrap_transform)
output('...done in %.2f s' % timer.stop())
n_eigs = evp.eigs.shape[0]
mag = norm_l2_along_axis(eigenmomenta)
if opts.threshold_is_relative:
tol = opts.threshold * mag.max()
else:
tol = opts.threshold
valid = nm.where(mag < tol, False, True)
mask = nm.where(valid == False)[0]
eigenmomenta[mask, :] = 0.0
n_zeroed = mask.shape[0]
output('%d of %d eigenmomenta zeroed (under %.2e)'\
% (n_zeroed, n_eigs, tol))
out = Struct(name='eigenmomenta',
n_zeroed=n_zeroed,
eigenmomenta=eigenmomenta,
valid=valid,
to_file_txt=None)
return out
def check_tangent_matrix(conf, vec_x0, fun, fun_grad):
"""
Verify the correctness of the tangent matrix as computed by `fun_grad()` by
comparing it with its finite difference approximation evaluated by
repeatedly calling `fun()` with `vec_x0` items perturbed by a small delta.
"""
vec_x = vec_x0.copy()
delta = conf.delta
vec_r = fun(vec_x) # Update state.
mtx_a0 = fun_grad(vec_x)
mtx_a = mtx_a0.tocsc()
mtx_d = mtx_a.copy()
mtx_d.data[:] = 0.0
vec_dx = nm.zeros_like(vec_r)
for ic in range(vec_dx.shape[0]):
vec_dx[ic] = delta
xx = vec_x.copy() - vec_dx
vec_r1 = fun(xx)
vec_dx[ic] = -delta
xx = vec_x.copy() - vec_dx
vec_r2 = fun(xx)
vec_dx[ic] = 0.0;
vec = 0.5 * (vec_r2 - vec_r1) / delta
ir = mtx_a.indices[mtx_a.indptr[ic]:mtx_a.indptr[ic+1]]
mtx_d.data[mtx_a.indptr[ic]:mtx_a.indptr[ic+1]] = vec[ir]
vec_r = fun(vec_x) # Restore.
timer = Timer(start=True)
output(mtx_a, '.. analytical')
output(mtx_d, '.. difference')
import sfepy.base.plotutils as plu
plu.plot_matrix_diff(mtx_d, mtx_a, delta, ['difference', 'analytical'],
conf.check)
return timer.stop()
def partition_mesh(mesh, n_parts, use_metis=True, verbose=False):
"""
Partition the mesh cells into `n_parts` subdomains, using metis, if
available.
"""
output('partitioning mesh into %d subdomains...' % n_parts,
verbose=verbose)
timer = Timer(start=True)
if use_metis:
try:
from pymetis import part_graph
except ImportError:
output('pymetis is not available, using naive partitioning!')
part_graph = None
if use_metis and (part_graph is not None):
cmesh = mesh.cmesh
cmesh.setup_connectivity(cmesh.dim, cmesh.dim)
graph = cmesh.get_conn(cmesh.dim, cmesh.dim)
cuts, cell_tasks = part_graph(n_parts,
xadj=graph.offsets.astype(int),
adjncy=graph.indices.astype(int))
cell_tasks = nm.array(cell_tasks, dtype=nm.int32)
else:
ii = nm.arange(n_parts)
n_cell_parts = mesh.n_el // n_parts + ((mesh.n_el % n_parts) > ii)
output('cell counts:', n_cell_parts, verbose=verbose)
assert_(sum(n_cell_parts) == mesh.n_el)
assert_(nm.all(n_cell_parts > 0))
offs = nm.cumsum(nm.r_[0, n_cell_parts])
cell_tasks = nm.digitize(nm.arange(offs[-1]), offs) - 1
output('...done in', timer.stop(), verbose=verbose)
return cell_tasks
def wrap_function(function, args):
ncalls = [0]
times = []
timer = Timer()
def function_wrapper(x):
ncalls[0] += 1
timer.start()
out = function(x, *args)
times.append(timer.stop())
return out
return ncalls, times, function_wrapper
def init_solvers(self, problem):
"""
Setup solvers. Use local options if these are defined,
otherwise use the global ones.
For linear problems, assemble the matrix and try to presolve the
linear system.
"""
if hasattr(self, 'solvers'):
opts = self.solvers
else:
opts = problem.conf.options
problem.set_conf_solvers(problem.conf.solvers, opts)
problem.init_solvers()
if self.is_linear:
output('linear problem, trying to presolve...')
timer = Timer(start=True)
ev = problem.get_evaluator()
state = problem.create_state()
try:
mtx_a = ev.eval_tangent_matrix(state(), is_full=True)
except ValueError:
output('matrix evaluation failed, giving up...')
raise
problem.set_linear(True)
problem.try_presolve(mtx_a)
output('...done in %.2f s' % timer.stop())
else:
problem.set_linear(False)
def __call__(self,
x0,
conf=None,
obj_fun=None,
obj_fun_grad=None,
status=None,
obj_args=None):
import inspect
if conf is not None:
self.set_method(conf)
else:
conf = self.conf
obj_fun = get_default(obj_fun, self.obj_fun)
obj_fun_grad = get_default(obj_fun_grad, self.obj_fun_grad)
status = get_default(status, self.status)
obj_args = get_default(obj_args, self.obj_args)
timer = Timer(start=True)
kwargs = {self._i_max_name[conf.method]: conf.i_max, 'args': obj_args}
if conf.method in self._has_grad:
kwargs['fprime'] = obj_fun_grad
if 'disp' in inspect.getargspec(self.solver)[0]:
kwargs['disp'] = conf.verbose
kwargs.update(self.build_solver_kwargs(conf))
out = self.solver(obj_fun, x0, **kwargs)
if status is not None:
status['time_stats'] = timer.stop()
return out
def solve_eigen_problem(self):
opts = self.app_options
pb = self.problem
pb.set_equations(pb.conf.equations)
pb.time_update()
output('assembling lhs...')
timer = Timer(start=True)
mtx_a = pb.evaluate(pb.conf.equations['lhs'],
mode='weak',
auto_init=True,
dw_mode='matrix')
output('...done in %.2f s' % timer.stop())
if 'rhs' in pb.conf.equations:
output('assembling rhs...')
timer.start()
mtx_b = pb.evaluate(pb.conf.equations['rhs'],
mode='weak',
dw_mode='matrix')
output('...done in %.2f s' % timer.stop())
else:
mtx_b = None
_n_eigs = get_default(opts.n_eigs, mtx_a.shape[0])
output('solving eigenvalue problem for {} values...'.format(_n_eigs))
eig = Solver.any_from_conf(pb.get_solver_conf(opts.evps))
if opts.eigs_only:
eigs = eig(mtx_a, mtx_b, opts.n_eigs, eigenvectors=False)
svecs = None
else:
eigs, svecs = eig(mtx_a, mtx_b, opts.n_eigs, eigenvectors=True)
output('...done')
vecs = self.make_full(svecs)
self.save_results(eigs, vecs)
return Struct(pb=pb, eigs=eigs, vecs=vecs)
def recover_micro_hook_eps(micro_filename, region,
eval_var, nodal_values, const_values, eps0,
recovery_file_tag='',
define_args=None, verbose=False):
# Create a micro-problem instance.
required, other = get_standard_keywords()
required.remove('equations')
conf = ProblemConf.from_file(micro_filename, required, other,
verbose=False, define_args=define_args)
coefs_filename = conf.options.get('coefs_filename', 'coefs')
output_dir = conf.options.get('output_dir', '.')
coefs_filename = op.join(output_dir, coefs_filename) + '.h5'
# Coefficients and correctors
coefs = Coefficients.from_file_hdf5(coefs_filename)
corrs = get_correctors_from_file_hdf5(dump_names=coefs.save_names)
recovery_hook = conf.options.get('recovery_hook', None)
if recovery_hook is not None:
recovery_hook = conf.get_function(recovery_hook)
pb = Problem.from_conf(conf, init_equations=False, init_solvers=False)
# Get tiling of a given region
rcoors = region.domain.mesh.coors[region.get_entities(0), :]
rcmin = nm.min(rcoors, axis=0)
rcmax = nm.max(rcoors, axis=0)
nn = nm.round((rcmax - rcmin) / eps0)
if nm.prod(nn) == 0:
output('inconsistency in recovery region and microstructure size!')
return
cs = []
for ii, n in enumerate(nn):
cs.append(nm.arange(n) * eps0 + rcmin[ii])
x0 = nm.empty((int(nm.prod(nn)), nn.shape[0]), dtype=nm.float64)
for ii, icoor in enumerate(nm.meshgrid(*cs, indexing='ij')):
x0[:, ii] = icoor.flatten()
mesh = pb.domain.mesh
coors, conn, outs, ndoffset = [], [], [], 0
# Recover region
mic_coors = (mesh.coors - mesh.get_bounding_box()[0, :]) * eps0
evfield = eval_var.field
output('recovering microsctructures...')
timer = Timer(start=True)
output_fun = output.output_function
output_level = output.level
for ii, c0 in enumerate(x0):
local_macro = {'eps0': eps0}
local_coors = mic_coors + c0
# Inside recovery region?
v = nm.ones((evfield.region.entities[0].shape[0], 1))
v[evfield.vertex_remap[region.entities[0]]] = 0
no = nm.sum(v)
aux = evfield.evaluate_at(local_coors, v)
if no > 0 and (nm.sum(aux) / no) > 1e-3:
continue
output.level = output_level
output('micro: %d' % ii)
for k, v in six.iteritems(nodal_values):
local_macro[k] = evfield.evaluate_at(local_coors, v)
for k, v in six.iteritems(const_values):
local_macro[k] = v
output.set_output(quiet=not(verbose))
outs.append(recovery_hook(pb, corrs, local_macro))
output.output_function = output_fun
coors.append(local_coors)
conn.append(mesh.get_conn(mesh.descs[0]) + ndoffset)
ndoffset += mesh.n_nod
output('...done in %.2f s' % timer.stop())
# Collect output variables
outvars = {}
for k, v in six.iteritems(outs[0]):
if v.var_name in outvars:
outvars[v.var_name].append(k)
else:
outvars[v.var_name] = [k]
# Split output by variables/regions
pvs = pb.create_variables(outvars.keys())
outregs = {k: pvs[k].field.region.get_entities(-1) for k in outvars.keys()}
nrve = len(coors)
coors = nm.vstack(coors)
ngroups = nm.tile(mesh.cmesh.vertex_groups.squeeze(), (nrve,))
conn = nm.vstack(conn)
cgroups = nm.tile(mesh.cmesh.cell_groups.squeeze(), (nrve,))
# Get region mesh and data
for k, cidxs in six.iteritems(outregs):
gcidxs = nm.hstack([cidxs + mesh.n_el * ii for ii in range(nrve)])
rconn = conn[gcidxs]
remap = -nm.ones((coors.shape[0],), dtype=nm.int32)
remap[rconn] = 1
vidxs = nm.where(remap > 0)[0]
remap[vidxs] = nm.arange(len(vidxs))
rconn = remap[rconn]
rcoors = coors[vidxs, :]
out = {}
for ifield in outvars[k]:
data = [outs[ii][ifield].data for ii in range(nrve)]
out[ifield] = Struct(name='output_data',
mode=outs[0][ifield].mode,
dofs=None,
var_name=k,
data=nm.vstack(data))
micro_name = pb.get_output_name(extra='recovered%s_%s'
% (recovery_file_tag, k))
filename = op.join(output_dir, op.basename(micro_name))
mesh_out = Mesh.from_data('recovery_%s' % k, rcoors, ngroups[vidxs],
[rconn], [cgroups[gcidxs]], [mesh.descs[0]])
mesh_out.write(filename, io='auto', out=out)
def evaluate_at(self,
coors,
source_vals,
mode='val',
strategy='general',
close_limit=0.1,
get_cells_fun=None,
cache=None,
ret_cells=False,
ret_status=False,
ret_ref_coors=False,
verbose=False):
"""
Evaluate source DOF values corresponding to the field in the given
coordinates using the field interpolation.
Parameters
----------
coors : array, shape ``(n_coor, dim)``
The coordinates the source values should be interpolated into.
source_vals : array, shape ``(n_nod, n_components)``
The source DOF values corresponding to the field.
mode : {'val', 'grad'}, optional
The evaluation mode: the field value (default) or the field value
gradient.
strategy : {'general', 'convex'}, optional
The strategy for finding the elements that contain the
coordinates. For convex meshes, the 'convex' strategy might be
faster than the 'general' one.
close_limit : float, optional
The maximum limit distance of a point from the closest
element allowed for extrapolation.
get_cells_fun : callable, optional
If given, a function with signature ``get_cells_fun(coors, cmesh,
**kwargs)`` returning cells and offsets that potentially contain
points with the coordinates `coors`. Applicable only when
`strategy` is 'general'. When not given,
:func:`get_potential_cells()
<sfepy.discrete.common.global_interp.get_potential_cells>` is used.
cache : Struct, optional
To speed up a sequence of evaluations, the field mesh and other
data can be cached. Optionally, the cache can also contain the
reference element coordinates as `cache.ref_coors`, `cache.cells`
and `cache.status`, if the evaluation occurs in the same
coordinates repeatedly. In that case the mesh related data are
ignored. See :func:`Field.get_evaluate_cache()
<sfepy.discrete.fem.fields_base.FEField.get_evaluate_cache()>`.
ret_ref_coors : bool, optional
If True, return also the found reference element coordinates.
ret_status : bool, optional
If True, return also the enclosing cell status for each point.
ret_cells : bool, optional
If True, return also the cell indices the coordinates are in.
verbose : bool
If False, reduce verbosity.
Returns
-------
vals : array
The interpolated values with shape ``(n_coor, n_components)`` or
gradients with shape ``(n_coor, n_components, dim)`` according to
the `mode`. If `ret_status` is False, the values where the status
is greater than one are set to ``numpy.nan``.
ref_coors : array
The found reference element coordinates, if `ret_ref_coors` is True.
cells : array
The cell indices, if `ret_ref_coors` or `ret_cells` or `ret_status`
are True.
status : array
The status, if `ret_ref_coors` or `ret_status` are True, with the
following meaning: 0 is success, 1 is extrapolation within
`close_limit`, 2 is extrapolation outside `close_limit`, 3 is
failure, 4 is failure due to non-convergence of the Newton
iteration in tensor product cells. If close_limit is 0, then for
the 'general' strategy the status 5 indicates points outside of the
field domain that had no potential cells.
"""
from sfepy.discrete.common.global_interp import get_ref_coors
from sfepy.discrete.common.extmods.crefcoors import evaluate_in_rc
from sfepy.base.base import complex_types
output('evaluating in %d points...' % coors.shape[0], verbose=verbose)
ref_coors, cells, status = get_ref_coors(self,
coors,
strategy=strategy,
close_limit=close_limit,
get_cells_fun=get_cells_fun,
cache=cache,
verbose=verbose)
timer = Timer(start=True)
# Interpolate to the reference coordinates.
source_dtype = nm.float64 if source_vals.dtype in complex_types\
else source_vals.dtype
if mode == 'val':
vals = nm.empty((coors.shape[0], source_vals.shape[1], 1),
dtype=source_dtype)
cmode = 0
elif mode == 'grad':
vals = nm.empty(
(coors.shape[0], source_vals.shape[1], coors.shape[1]),
dtype=source_dtype)
cmode = 1
ctx = self.create_basis_context()
if source_vals.dtype in complex_types:
valsi = vals.copy()
evaluate_in_rc(vals, ref_coors, cells, status,
nm.ascontiguousarray(source_vals.real),
self.get_econn('volume', self.region), cmode, ctx)
evaluate_in_rc(valsi, ref_coors, cells, status,
nm.ascontiguousarray(source_vals.imag),
self.get_econn('volume', self.region), cmode, ctx)
vals = vals + valsi * 1j
else:
evaluate_in_rc(vals, ref_coors, cells, status, source_vals,
self.get_econn('volume', self.region), cmode, ctx)
output('interpolation: %f s' % timer.stop(), verbose=verbose)
output('...done', verbose=verbose)
if mode == 'val':
vals.shape = (coors.shape[0], source_vals.shape[1])
if not ret_status:
ii = nm.where(status > 1)[0]
vals[ii] = nm.nan
if ret_ref_coors:
return vals, ref_coors, cells, status
elif ret_status:
return vals, cells, status
elif ret_cells:
return vals, cells
else:
return vals
def __call__(self, vec_x0, conf=None, fun=None, fun_grad=None,
lin_solver=None, iter_hook=None, status=None,
pmtx=None, prhs=None, comm=None):
conf = self.conf
fun = get_default(fun, self.fun)
fun_grad = get_default(fun_grad, self.fun_grad)
lin_solver = get_default(lin_solver, self.lin_solver)
iter_hook = get_default(iter_hook, self.iter_hook)
status = get_default(status, self.status)
pmtx = get_default(pmtx, self.pmtx)
prhs = get_default(prhs, self.prhs)
comm = get_default(comm, self.comm)
timer = Timer(start=True)
if isinstance(vec_x0, self.petsc.Vec):
psol = vec_x0
else:
psol = pmtx.getVecLeft()
psol[...] = vec_x0
snes = self.petsc.SNES()
snes.create(comm)
snes.setType(conf.method)
ksp = lin_solver.create_ksp()
snes.setKSP(ksp)
ls_conf = lin_solver.conf
ksp.setTolerances(atol=ls_conf.eps_a, rtol=ls_conf.eps_r,
divtol=ls_conf.eps_d, max_it=ls_conf.i_max)
snes.setFunction(fun, prhs)
snes.setJacobian(fun_grad, pmtx)
snes.setTolerances(atol=conf.eps_a, rtol=conf.eps_r,
stol=conf.eps_s, max_it=conf.i_max)
snes.setMaxFunctionEvaluations(conf.if_max)
snes.setFromOptions()
fun(snes, psol, prhs)
err0 = prhs.norm()
snes.solve(prhs.duplicate(), psol)
if status is not None:
status['time_stats'] = timer.stop()
if snes.reason in self.converged_reasons:
reason = 'snes: %s' % self.converged_reasons[snes.reason]
else:
reason = 'ksp: %s' % self.ksp_converged_reasons[snes.reason]
output('%s(%s): %d iterations in the last step'
% (ksp.getType(), ksp.getPC().getType(),
ksp.getIterationNumber()),
verbose=conf.verbose)
output('%s convergence: %s (%s, %d iterations, %d function evaluations)'
% (snes.getType(), snes.reason, reason,
snes.getIterationNumber(), snes.getFunctionEvaluations()),
verbose=conf.verbose)
converged = snes.reason >= 0
if not converged:
# PETSc does not update the solution if KSP have not converged.
dpsol = snes.getSolutionUpdate()
psol -= dpsol
fun(snes, psol, prhs)
err = prhs.norm()
else:
try:
err = snes.getFunctionNorm()
except AttributeError:
fun(snes, psol, prhs)
err = prhs.norm()
if status is not None:
status['err0'] = err0
status['err'] = err
status['n_iter'] = snes.getIterationNumber()
status['ls_n_iter'] = snes.getLinearSolveIterations()
status['condition'] = 0 if converged else -1
if isinstance(vec_x0, self.petsc.Vec):
sol = psol
else:
sol = psol[...].copy()
return sol
def solve_problem(mesh_filename, options, comm):
order_u = options.order_u
order_p = options.order_p
rank, size = comm.Get_rank(), comm.Get_size()
output('rank', rank, 'of', size)
stats = Struct()
timer = Timer('solve_timer')
timer.start()
mesh = Mesh.from_file(mesh_filename)
stats.t_read_mesh = timer.stop()
timer.start()
if rank == 0:
cell_tasks = pl.partition_mesh(mesh, size, use_metis=options.metis,
verbose=True)
else:
cell_tasks = None
stats.t_partition_mesh = timer.stop()
output('creating global domain and fields...')
timer.start()
domain = FEDomain('domain', mesh)
omega = domain.create_region('Omega', 'all')
field1 = Field.from_args('fu', nm.float64, mesh.dim, omega,
approx_order=order_u)
field2 = Field.from_args('fp', nm.float64, 1, omega,
approx_order=order_p)
fields = [field1, field2]
stats.t_create_global_fields = timer.stop()
output('...done in', timer.dt)
output('distributing fields...')
timer.start()
distribute = pl.distribute_fields_dofs
lfds, gfds = distribute(fields, cell_tasks,
is_overlap=True,
use_expand_dofs=True,
save_inter_regions=options.save_inter_regions,
output_dir=options.output_dir,
comm=comm, verbose=True)
stats.t_distribute_fields_dofs = timer.stop()
output('...done in', timer.dt)
output('creating local problem...')
timer.start()
cells = lfds[0].cells
omega_gi = Region.from_cells(cells, domain)
omega_gi.finalize()
omega_gi.update_shape()
pb = create_local_problem(omega_gi, [order_u, order_p])
variables = pb.get_variables()
state = State(variables)
state.fill(0.0)
state.apply_ebc()
stats.t_create_local_problem = timer.stop()
output('...done in', timer.dt)
output('allocating global system...')
timer.start()
sizes, drange, pdofs = pl.setup_composite_dofs(lfds, fields, variables,
verbose=True)
pmtx, psol, prhs = pl.create_petsc_system(pb.mtx_a, sizes, pdofs, drange,
is_overlap=True, comm=comm,
verbose=True)
stats.t_allocate_global_system = timer.stop()
output('...done in', timer.dt)
output('creating solver...')
timer.start()
conf = Struct(method='bcgsl', precond='jacobi', sub_precond='none',
i_max=10000, eps_a=1e-50, eps_r=1e-6, eps_d=1e4,
verbose=True)
status = {}
ls = PETScKrylovSolver(conf, comm=comm, mtx=pmtx, status=status)
field_ranges = {}
for ii, variable in enumerate(variables.iter_state(ordered=True)):
field_ranges[variable.name] = lfds[ii].petsc_dofs_range
ls.set_field_split(field_ranges, comm=comm)
ev = PETScParallelEvaluator(pb, pdofs, drange, True,
psol, comm, verbose=True)
nls_status = {}
conf = Struct(method='newtonls',
i_max=5, eps_a=0, eps_r=1e-5, eps_s=0.0,
verbose=True)
nls = PETScNonlinearSolver(conf, pmtx=pmtx, prhs=prhs, comm=comm,
fun=ev.eval_residual,
fun_grad=ev.eval_tangent_matrix,
lin_solver=ls, status=nls_status)
stats.t_create_solver = timer.stop()
output('...done in', timer.dt)
output('solving...')
timer.start()
state = pb.create_state()
state.apply_ebc()
ev.psol_i[...] = state()
ev.gather(psol, ev.psol_i)
psol = nls(psol)
ev.scatter(ev.psol_i, psol)
sol0_i = ev.psol_i[...]
stats.t_solve = timer.stop()
output('...done in', timer.dt)
output('saving solution...')
timer.start()
state.set_full(sol0_i)
out = state.create_output_dict()
filename = os.path.join(options.output_dir, 'sol_%02d.h5' % comm.rank)
pb.domain.mesh.write(filename, io='auto', out=out)
gather_to_zero = pl.create_gather_to_zero(psol)
psol_full = gather_to_zero(psol)
if comm.rank == 0:
sol = psol_full[...].copy()
u = FieldVariable('u', 'parameter', field1,
primary_var_name='(set-to-None)')
remap = gfds[0].id_map
ug = sol[remap]
p = FieldVariable('p', 'parameter', field2,
primary_var_name='(set-to-None)')
remap = gfds[1].id_map
pg = sol[remap]
if (((order_u == 1) and (order_p == 1))
or (options.linearization == 'strip')):
out = u.create_output(ug)
out.update(p.create_output(pg))
filename = os.path.join(options.output_dir, 'sol.h5')
mesh.write(filename, io='auto', out=out)
else:
out = u.create_output(ug, linearization=Struct(kind='adaptive',
min_level=0,
max_level=order_u,
eps=1e-3))
filename = os.path.join(options.output_dir, 'sol_u.h5')
out['u'].mesh.write(filename, io='auto', out=out)
out = p.create_output(pg, linearization=Struct(kind='adaptive',
min_level=0,
max_level=order_p,
eps=1e-3))
filename = os.path.join(options.output_dir, 'sol_p.h5')
out['p'].mesh.write(filename, io='auto', out=out)
stats.t_save_solution = timer.stop()
output('...done in', timer.dt)
stats.t_total = timer.total
stats.n_dof = sizes[1]
stats.n_dof_local = sizes[0]
stats.n_cell = omega.shape.n_cell
stats.n_cell_local = omega_gi.shape.n_cell
return stats
def __call__(self,
vec_x0,
conf=None,
fun=None,
fun_grad=None,
lin_solver=None,
status=None,
problem=None):
"""
Oseen solver is problem-specific - it requires a Problem instance.
"""
conf = get_default(conf, self.conf)
fun = get_default(fun, self.fun)
fun_grad = get_default(fun_grad, self.fun_grad)
lin_solver = get_default(lin_solver, self.lin_solver)
status = get_default(status, self.status)
problem = get_default(problem, conf.problem,
'`problem` parameter needs to be set!')
timer = Timer()
time_stats = {}
stabil = problem.get_materials()[conf.stabil_mat]
ns, ii = stabil.function.function.get_maps()
variables = problem.get_variables()
update_var = variables.set_from_state
make_full_vec = variables.make_full_vec
output('problem size:')
output(' velocity: %s' % ii['us'])
output(' pressure: %s' % ii['ps'])
vec_x = vec_x0.copy()
vec_x_prev = vec_x0.copy()
vec_dx = None
if self.log is not None:
self.log.plot_vlines(color='r', linewidth=1.0)
err0 = -1.0
it = 0
while 1:
vec_x_prev_f = make_full_vec(vec_x_prev)
update_var(ns['b'], vec_x_prev_f, ns['u'])
vec_b = vec_x_prev_f[ii['u']]
b_norm = nla.norm(vec_b, nm.inf)
output('|b|_max: %.12e' % b_norm)
vec_x_f = make_full_vec(vec_x)
vec_u = vec_x_f[ii['u']]
u_norm = nla.norm(vec_u, nm.inf)
output('|u|_max: %.2e' % u_norm)
stabil.function.set_extra_args(b_norm=b_norm)
stabil.time_update(None,
problem.equations,
mode='force',
problem=problem)
max_pars = stabil.reduce_on_datas(lambda a, b: max(a, b.max()))
output('stabilization parameters:')
output(' gamma: %.12e' % max_pars[ns['gamma']])
output(' max(delta): %.12e' % max_pars[ns['delta']])
output(' max(tau): %.12e' % max_pars[ns['tau']])
if (not are_close(b_norm, 1.0)) and conf.adimensionalize:
adimensionalize = True
else:
adimensionalize = False
timer.start()
try:
vec_r = fun(vec_x)
except ValueError:
ok = False
else:
ok = True
time_stats['residual'] = timer.stop()
if ok:
err = nla.norm(vec_r)
if it == 0:
err0 = err
else:
err += nla.norm(vec_dx)
else: # Failure.
output('residual computation failed for iter %d!' % it)
raise RuntimeError('giving up...')
if self.log is not None:
self.log(err, it, max_pars[ns['gamma']], max_pars[ns['delta']],
max_pars[ns['tau']])
condition = conv_test(conf, it, err, err0)
if condition >= 0:
break
if adimensionalize:
output('adimensionalizing')
## mat.viscosity = viscosity / b_norm
## vec_r[indx_us] /= b_norm
timer.start()
try:
mtx_a = fun_grad(vec_x)
except ValueError:
ok = False
else:
ok = True
time_stats['matrix'] = timer.stop()
if not ok:
raise RuntimeError('giving up...')
timer.start()
vec_dx = lin_solver(vec_r, x0=vec_x, mtx=mtx_a)
time_stats['solve'] = timer.stop()
vec_e = mtx_a * vec_dx - vec_r
lerr = nla.norm(vec_e)
if lerr > (conf.eps_a * conf.lin_red):
output('linear system not solved! (err = %e)' % lerr)
if adimensionalize:
output('restoring pressure...')
## vec_dx[indx_ps] *= b_norm
dx_norm = nla.norm(vec_dx)
output('||dx||: %.2e' % dx_norm)
for kv in six.iteritems(time_stats):
output('%10s: %7.2f [s]' % kv)
vec_x_prev = vec_x.copy()
vec_x -= vec_dx
it += 1
if conf.check_navier_stokes_residual:
t1 = '+ dw_div_grad.%s.%s(%s.viscosity, %s, %s)' \
% (ns['i2'], ns['omega'], ns['fluid'], ns['v'], ns['u'])
# t2 = '+ dw_lin_convect.%s(%s, %s, %s)' % (ns['omega'],
# ns['v'], b_name, ns['u'])
t2 = '+ dw_convect.%s.%s(%s, %s)' % (ns['i2'], ns['omega'],
ns['v'], ns['u'])
t3 = '- dw_stokes.%s.%s(%s, %s)' % (ns['i1'], ns['omega'], ns['v'],
ns['p'])
t4 = 'dw_stokes.%s.%s(%s, %s)' % (ns['i1'], ns['omega'], ns['u'],
ns['q'])
equations = {
'balance': ' '.join((t1, t2, t3)),
'incompressibility': t4,
}
problem.set_equations(equations)
try:
vec_rns0 = fun(vec_x0)
vec_rns = fun(vec_x)
except ValueError:
ok = False
else:
ok = True
if not ok:
output('Navier-Stokes residual computation failed!')
err_ns = err_ns0 = None
else:
err_ns0 = nla.norm(vec_rns0)
err_ns = nla.norm(vec_rns)
output('Navier-Stokes residual0: %.8e' % err_ns0)
output('Navier-Stokes residual : %.8e' % err_ns)
output('b - u: %.8e' % nla.norm(vec_b - vec_u))
output(condition)
else:
err_ns = None
if status is not None:
status['time_stats'] = time_stats
status['err0'] = err0
status['err'] = err
status['err_ns'] = err_ns
status['condition'] = condition
if conf.log.plot is not None:
if self.log is not None:
self.log(save_figure=conf.log.plot)
return vec_x
def assemble_mtx_to_petsc(pmtx,
mtx,
pdofs,
drange,
is_overlap=True,
comm=None,
verbose=False):
"""
Assemble a local CSR matrix to a global PETSc matrix.
"""
if comm is None:
comm = PETSc.COMM_WORLD
timer = Timer()
lgmap = PETSc.LGMap().create(pdofs, comm=comm)
pmtx.setLGMap(lgmap, lgmap)
if is_overlap:
output('setting matrix values...', verbose=verbose)
timer.start()
mask = (pdofs < drange[0]) | (pdofs >= drange[1])
nnz_per_row = nm.diff(mtx.indptr)
mtx2 = mtx.copy()
mtx2.data[nm.repeat(mask, nnz_per_row)] = 0
mtx2.eliminate_zeros()
pmtx.setValuesLocalCSR(mtx2.indptr, mtx2.indices, mtx2.data,
PETSc.InsertMode.INSERT_VALUES)
output('...done in', timer.stop(), verbose=verbose)
output('assembling matrix...', verbose=verbose)
timer.start()
pmtx.assemble()
output('...done in', timer.stop(), verbose=verbose)
else:
output('setting matrix values...', verbose=verbose)
timer.start()
pmtx.setValuesLocalCSR(mtx.indptr, mtx.indices, mtx.data,
PETSc.InsertMode.ADD_VALUES)
output('...done in', timer.stop(), verbose=verbose)
output('assembling matrix...', verbose=verbose)
timer.start()
pmtx.assemble()
output('...done in', timer.stop(), verbose=verbose)
def assemble_rhs_to_petsc(prhs,
rhs,
pdofs,
drange,
is_overlap=True,
comm=None,
verbose=False):
"""
Assemble a local right-hand side vector to a global PETSc vector.
"""
if comm is None:
comm = PETSc.COMM_WORLD
timer = Timer()
if is_overlap:
output('setting rhs values...', verbose=verbose)
timer.start()
rdofs = nm.where((pdofs < drange[0]) | (pdofs >= drange[1]), -1, pdofs)
prhs.setOption(prhs.Option.IGNORE_NEGATIVE_INDICES, True)
prhs.setValues(rdofs, rhs, PETSc.InsertMode.INSERT_VALUES)
output('...done in', timer.stop(), verbose=verbose)
output('assembling rhs...', verbose=verbose)
timer.start()
prhs.assemble()
output('...done in', timer.stop(), verbose=verbose)
else:
output('setting rhs values...', verbose=verbose)
timer.start()
prhs.setValues(pdofs, rhs, PETSc.InsertMode.ADD_VALUES)
output('...done in', timer.stop(), verbose=verbose)
output('assembling rhs...', verbose=verbose)
timer.start()
prhs.assemble()
output('...done in', timer.stop(), verbose=verbose)
def verify_task_dof_maps(dof_maps,
id_map,
field,
use_expand_dofs=False,
verbose=False):
"""
Verify the counts and values of DOFs in `dof_maps` and `id_map`
corresponding to `field`.
Returns the vector with a task number for each DOF.
"""
timer = Timer(start=True)
if verbose:
output('verifying...')
output('total number of DOFs:', field.n_nod)
output('number of tasks:', len(dof_maps))
count = count2 = 0
dofs = []
if use_expand_dofs:
vec = nm.empty(field.n_nod * field.n_components, dtype=nm.float64)
else:
vec = nm.empty(field.n_nod, dtype=nm.float64)
for ir, dof_map in ordered_iteritems(dof_maps):
n_owned = dof_map[3]
offset = dof_map[4]
o2 = offset + n_owned
if verbose:
output('task %d: %d owned on offset %d' % (ir, n_owned, offset))
if not use_expand_dofs:
aux = dof_map[0]
assert_(nm.all((id_map[aux] >= offset) & (id_map[aux] < o2)))
count2 += dof_map[3]
count += len(dof_map[0])
dofs.append(dof_map[0])
vec[dof_map[0]] = ir
for aux in dof_map[1]:
if not use_expand_dofs:
assert_(nm.all((id_map[aux] >= offset) & (id_map[aux] < o2)))
count += len(aux)
dofs.append(aux)
vec[aux] = ir
dofs = nm.concatenate(dofs)
n_dof = vec.shape[0]
assert_(n_dof == len(dofs))
if not expand_dofs:
assert_(nm.all(nm.sort(dofs) == nm.sort(id_map)))
dofs = nm.unique(dofs)
assert_(n_dof == len(dofs))
assert_(n_dof == dofs[-1] + 1)
assert_(n_dof == count)
assert_(n_dof == count2)
assert_(n_dof == len(id_map))
assert_(n_dof == len(nm.unique(id_map)))
output('...done in', timer.stop(), verbose=verbose)
return vec
def get_ref_coors_convex(field,
coors,
close_limit=0.1,
cache=None,
verbose=False):
"""
Get reference element coordinates and elements corresponding to given
physical coordinates.
Parameters
----------
field : Field instance
The field defining the approximation.
coors : array
The physical coordinates.
close_limit : float, optional
The maximum limit distance of a point from the closest
element allowed for extrapolation.
cache : Struct, optional
To speed up a sequence of evaluations, the field mesh and other data
can be cached. Optionally, the cache can also contain the reference
element coordinates as `cache.ref_coors`, `cache.cells` and
`cache.status`, if the evaluation occurs in the same coordinates
repeatedly. In that case the mesh related data are ignored.
verbose : bool
If False, reduce verbosity.
Returns
-------
ref_coors : array
The reference coordinates.
cells : array
The cell indices corresponding to the reference coordinates.
status : array
The status: 0 is success, 1 is extrapolation within `close_limit`, 2 is
extrapolation outside `close_limit`, 3 is failure, 4 is failure due to
non-convergence of the Newton iteration in tensor product cells.
Notes
-----
Outline of the algorithm for finding xi such that X(xi) = P:
1. make inverse connectivity - for each vertex have cells it is in.
2. find the closest vertex V.
3. choose initial cell: i0 = first from cells incident to V.
4. while not P in C_i, change C_i towards P, check if P in new C_i.
"""
timer = Timer()
ref_coors = get_default_attr(cache, 'ref_coors', None)
if ref_coors is None:
extrapolate = close_limit > 0.0
ref_coors = nm.empty_like(coors)
cells = nm.empty((coors.shape[0], ), dtype=nm.int32)
status = nm.empty((coors.shape[0], ), dtype=nm.int32)
cmesh = get_default_attr(cache, 'cmesh', None)
if cmesh is None:
timer.start()
mesh = field.create_mesh(extra_nodes=False)
cmesh = mesh.cmesh
gels = create_geometry_elements()
cmesh.set_local_entities(gels)
cmesh.setup_entities()
centroids = cmesh.get_centroids(cmesh.tdim)
if field.gel.name != '3_8':
normals0 = cmesh.get_facet_normals()
normals1 = None
else:
normals0 = cmesh.get_facet_normals(0)
normals1 = cmesh.get_facet_normals(1)
output('cmesh setup: %f s' % timer.stop(), verbose=verbose)
else:
centroids = cache.centroids
normals0 = cache.normals0
normals1 = cache.normals1
kdtree = get_default_attr(cache, 'kdtree', None)
if kdtree is None:
from scipy.spatial import cKDTree as KDTree
timer.start()
kdtree = KDTree(cmesh.coors)
output('kdtree: %f s' % timer.stop(), verbose=verbose)
timer.start()
ics = kdtree.query(coors)[1]
output('kdtree query: %f s' % timer.stop(), verbose=verbose)
ics = nm.asarray(ics, dtype=nm.int32)
coors = nm.ascontiguousarray(coors)
ctx = field.create_basis_context()
timer.start()
crc.find_ref_coors_convex(ref_coors, cells, status, coors, cmesh,
centroids, normals0, normals1, ics,
extrapolate, 1e-15, close_limit, ctx)
output('ref. coordinates: %f s' % timer.stop(), verbose=verbose)
else:
cells = cache.cells
status = cache.status
return ref_coors, cells, status
def create_matrix_graph(self,
any_dof_conn=False,
rdcs=None,
cdcs=None,
shape=None,
active_only=True,
verbose=True):
"""
Create tangent matrix graph, i.e. preallocate and initialize the
sparse storage needed for the tangent matrix. Order of DOF
connectivities is not important.
Parameters
----------
any_dof_conn : bool
By default, only volume DOF connectivities are used, with
the exception of trace surface DOF connectivities. If True,
any kind of DOF connectivities is allowed.
rdcs, cdcs : arrays, optional
Additional row and column DOF connectivities, corresponding
to the variables used in the equations.
shape : tuple, optional
The required shape, if it is different from the shape
determined by the equations variables. This may be needed if
additional row and column DOF connectivities are passed in.
active_only : bool
If True, the matrix graph has reduced size and is created with the
reduced (active DOFs only) numbering.
verbose : bool
If False, reduce verbosity.
Returns
-------
matrix : csr_matrix
The matrix graph in the form of a CSR matrix with
preallocated structure and zero data.
"""
if not self.variables.has_virtuals():
output('no matrix (no test variables)!')
return None
shape = get_default(shape, self.variables.get_matrix_shape())
output('matrix shape:', shape, verbose=verbose)
if nm.prod(shape) == 0:
output('no matrix (zero size)!')
return None
rdcs, cdcs = self.get_graph_conns(any_dof_conn=any_dof_conn,
rdcs=rdcs,
cdcs=cdcs,
active_only=active_only)
if not len(rdcs):
output('no matrix (empty dof connectivities)!')
return None
output('assembling matrix graph...', verbose=verbose)
timer = Timer(start=True)
nnz, prow, icol = create_mesh_graph(shape[0], shape[1], len(rdcs),
rdcs, cdcs)
output('...done in %.2f s' % timer.stop(), verbose=verbose)
output('matrix structural nonzeros: %d (%.2e%% fill)' \
% (nnz, float(nnz) / nm.prod(shape)), verbose=verbose)
data = nm.zeros((nnz, ), dtype=self.variables.dtype)
matrix = sp.csr_matrix((data, icol, prow), shape)
return matrix
def get_ref_coors_general(field,
coors,
close_limit=0.1,
get_cells_fun=None,
cache=None,
verbose=False):
"""
Get reference element coordinates and elements corresponding to given
physical coordinates.
Parameters
----------
field : Field instance
The field defining the approximation.
coors : array
The physical coordinates.
close_limit : float, optional
The maximum limit distance of a point from the closest
element allowed for extrapolation.
get_cells_fun : callable, optional
If given, a function with signature ``get_cells_fun(coors, cmesh,
**kwargs)`` returning cells and offsets that potentially contain points
with the coordinates `coors`. When not given,
:func:`get_potential_cells()` is used.
cache : Struct, optional
To speed up a sequence of evaluations, the field mesh and other data
can be cached. Optionally, the cache can also contain the reference
element coordinates as `cache.ref_coors`, `cache.cells` and
`cache.status`, if the evaluation occurs in the same coordinates
repeatedly. In that case the mesh related data are ignored.
verbose : bool
If False, reduce verbosity.
Returns
-------
ref_coors : array
The reference coordinates.
cells : array
The cell indices corresponding to the reference coordinates.
status : array
The status: 0 is success, 1 is extrapolation within `close_limit`, 2 is
extrapolation outside `close_limit`, 3 is failure, 4 is failure due to
non-convergence of the Newton iteration in tensor product cells. If
close_limit is 0, then status 5 indicates points outside of the field
domain that had no potential cells.
"""
timer = Timer()
ref_coors = get_default_attr(cache, 'ref_coors', None)
if ref_coors is None:
extrapolate = close_limit > 0.0
get = get_potential_cells if get_cells_fun is None else get_cells_fun
ref_coors = nm.empty_like(coors)
cells = nm.empty((coors.shape[0], ), dtype=nm.int32)
status = nm.empty((coors.shape[0], ), dtype=nm.int32)
cmesh = get_default_attr(cache, 'cmesh', None)
if cmesh is None:
timer.start()
mesh = field.create_mesh(extra_nodes=False)
cmesh = mesh.cmesh
if get_cells_fun is None:
centroids = cmesh.get_centroids(cmesh.tdim)
else:
centroids = None
output('cmesh setup: %f s' % timer.stop(), verbose=verbose)
else:
centroids = cache.centroids
timer.start()
potential_cells, offsets = get(coors,
cmesh,
centroids=centroids,
extrapolate=extrapolate)
output('potential cells: %f s' % timer.stop(), verbose=verbose)
coors = nm.ascontiguousarray(coors)
ctx = field.create_basis_context()
eval_cmesh = get_default_attr(cache, 'eval_cmesh', None)
if eval_cmesh is None:
timer.start()
mesh = field.create_eval_mesh()
if mesh is None:
eval_cmesh = cmesh
else:
eval_cmesh = mesh.cmesh
output('eval_cmesh setup: %f s' % timer.stop(), verbose=verbose)
timer.start()
crc.find_ref_coors(ref_coors, cells, status, coors, eval_cmesh,
potential_cells, offsets, extrapolate, 1e-15,
close_limit, ctx)
if extrapolate:
assert_(nm.all(status < 5))
output('ref. coordinates: %f s' % timer.stop(), verbose=verbose)
else:
cells = cache.cells
status = cache.status
return ref_coors, cells, status
def recover_micro_hook(micro_filename, region, macro,
naming_scheme='step_iel',
recovery_file_tag='',
define_args=None, verbose=False):
# Create a micro-problem instance.
required, other = get_standard_keywords()
required.remove('equations')
conf = ProblemConf.from_file(micro_filename, required, other,
verbose=False, define_args=define_args)
coefs_filename = conf.options.get('coefs_filename', 'coefs')
output_dir = conf.options.get('output_dir', '.')
coefs_filename = op.join(output_dir, coefs_filename) + '.h5'
# Coefficients and correctors
coefs = Coefficients.from_file_hdf5(coefs_filename)
corrs = get_correctors_from_file_hdf5(dump_names=coefs.save_names)
recovery_hook = conf.options.get('recovery_hook', None)
if recovery_hook is not None:
recovery_hook = conf.get_function(recovery_hook)
pb = Problem.from_conf(conf, init_equations=False, init_solvers=False)
format = get_print_info(pb.domain.mesh.n_el, fill='0')[1]
output('recovering microsctructures...')
timer = Timer(start=True)
output_fun = output.output_function
output_level = output.level
for ii, iel in enumerate(region.cells):
output.level = output_level
output('micro: %d (el=%d)' % (ii, iel))
local_macro = {}
for k, v in six.iteritems(macro):
local_macro[k] = v[ii, 0]
output.set_output(quiet=not(verbose))
out = recovery_hook(pb, corrs, local_macro)
output.output_function = output_fun
if ii == 0:
new_keys = []
new_data = {}
new_idxs = []
for k in six.iterkeys(local_macro):
if k not in macro:
new_keys.append(k)
new_data[k] = []
new_idxs.append(ii)
for jj in new_keys:
new_data[jj].append(local_macro[jj])
# save data
if out is not None:
suffix = format % iel
micro_name = pb.get_output_name(extra='recovered_'
+ recovery_file_tag + suffix)
filename = op.join(output_dir, op.basename(micro_name))
fpv = pb.conf.options.get('file_per_var', False)
pb.save_state(filename, out=out,
file_per_var=fpv)
output('...done in %.2f s' % timer.stop())
for jj in new_keys:
lout = new_data[jj]
macro[jj] = nm.zeros((nm.max(new_idxs) + 1, 1) + lout[0].shape,
dtype=lout[0].dtype)
out = macro[jj]
for kk, ii in enumerate(new_idxs):
out[ii, 0] = lout[kk]
