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reader.py
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reader.py
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"""Fine-grained control of reading data files."""
from __future__ import annotations
from abc import ABC
from abc import abstractmethod
from dataclasses import dataclass
import enum
from functools import wraps
import importlib
import os
import pathlib
from pathlib import Path
from typing import TYPE_CHECKING
from typing import Any
from xml.etree import ElementTree
import numpy as np
import pyvista
from pyvista.core import _vtk_core as _vtk
from .fileio import _get_ext_force
from .fileio import _process_filename
from .helpers import wrap
from .misc import abstract_class
if TYPE_CHECKING: # pragma: no cover
from collections.abc import Callable
HDF_HELP = 'https://kitware.github.io/vtk-examples/site/VTKFileFormats/#hdf-file-formats'
def _lazy_vtk_instantiation(module_name, class_name):
"""Lazy import and instantiation of a class from vtkmodules."""
module = importlib.import_module(f"vtkmodules.{module_name}")
return getattr(module, class_name)()
def lazy_vtkPOpenFOAMReader():
"""Lazy import of the vtkPOpenFOAMReader."""
from vtkmodules.vtkIOParallel import vtkPOpenFOAMReader
from vtkmodules.vtkParallelCore import vtkDummyController
# Workaround waiting for the fix to be upstream (MR 9195 gitlab.kitware.com/vtk/vtk)
reader = vtkPOpenFOAMReader()
reader.SetController(vtkDummyController())
return reader
def get_reader(filename, force_ext=None):
"""Get a reader for fine-grained control of reading data files.
Supported file types and Readers:
+----------------+---------------------------------------------+
| File Extension | Class |
+================+=============================================+
| ``.bmp`` | :class:`pyvista.BMPReader` |
+----------------+---------------------------------------------+
| ``.cas`` | :class:`pyvista.FluentReader` |
+----------------+---------------------------------------------+
| ``.case`` | :class:`pyvista.EnSightReader` |
+----------------+---------------------------------------------+
| ``.cgns`` | :class:`pyvista.CGNSReader` |
+----------------+---------------------------------------------+
| ``.cube`` | :class:`pyvista.GaussianCubeReader` |
+----------------+---------------------------------------------+
| ``.dat`` | :class:`pyvista.TecplotReader` |
+----------------+---------------------------------------------+
| ``.dcm`` | :class:`pyvista.DICOMReader` |
+----------------+---------------------------------------------+
| ``.dem`` | :class:`pyvista.DEMReader` |
+----------------+---------------------------------------------+
| ``.facet`` | :class:`pyvista.FacetReader` |
+----------------+---------------------------------------------+
| ``.foam`` | :class:`pyvista.POpenFOAMReader` |
+----------------+---------------------------------------------+
| ``.g`` | :class:`pyvista.BYUReader` |
+----------------+---------------------------------------------+
| ``.gif`` | :class:`pyvista.GIFReader` |
+----------------+---------------------------------------------+
| ``.glb`` | :class:`pyvista.GLTFReader` |
+----------------+---------------------------------------------+
| ``.gltf`` | :class:`pyvista.GLTFReader` |
+----------------+---------------------------------------------+
| ``.hdf`` | :class:`pyvista.HDFReader` |
+----------------+---------------------------------------------+
| ``.img`` | :class:`pyvista.DICOMReader` |
+----------------+---------------------------------------------+
| ``.inp`` | :class:`pyvista.AVSucdReader` |
+----------------+---------------------------------------------+
| ``.jpg`` | :class:`pyvista.JPEGReader` |
+----------------+---------------------------------------------+
| ``.jpeg`` | :class:`pyvista.JPEGReader` |
+----------------+---------------------------------------------+
| ``.hdr`` | :class:`pyvista.HDRReader` |
+----------------+---------------------------------------------+
| ``.mha`` | :class:`pyvista.MetaImageReader` |
+----------------+---------------------------------------------+
| ``.mhd`` | :class:`pyvista.MetaImageReader` |
+----------------+---------------------------------------------+
| ``.nii`` | :class:`pyvista.NIFTIReader` |
+----------------+---------------------------------------------+
| ``.nii.gz`` | :class:`pyvista.NIFTIReader` |
+----------------+---------------------------------------------+
| ``.nhdr`` | :class:`pyvista.NRRDReader` |
+----------------+---------------------------------------------+
| ``.nrrd`` | :class:`pyvista.NRRDReader` |
+----------------+---------------------------------------------+
| ``.obj`` | :class:`pyvista.OBJReader` |
+----------------+---------------------------------------------+
| ``.p3d`` | :class:`pyvista.Plot3DMetaReader` |
+----------------+---------------------------------------------+
| ``.ply`` | :class:`pyvista.PLYReader` |
+----------------+---------------------------------------------+
| ``.png`` | :class:`pyvista.PNGReader` |
+----------------+---------------------------------------------+
| ``.pnm`` | :class:`pyvista.PNMReader` |
+----------------+---------------------------------------------+
| ``.pts`` | :class:`pyvista.PTSReader` |
+----------------+---------------------------------------------+
| ``.pvd`` | :class:`pyvista.PVDReader` |
+----------------+---------------------------------------------+
| ``.pvti`` | :class:`pyvista.XMLPImageDataReader` |
+----------------+---------------------------------------------+
| ``.pvtk`` | :class:`pyvista.VTKPDataSetReader` |
+----------------+---------------------------------------------+
| ``.pvtr`` | :class:`pyvista.XMLPRectilinearGridReader` |
+----------------+---------------------------------------------+
| ``.pvtu`` | :class:`pyvista.XMLPUnstructuredGridReader` |
+----------------+---------------------------------------------+
| ``.res`` | :class:`pyvista.MFIXReader` |
+----------------+---------------------------------------------+
| ``.segy`` | :class:`pyvista.SegYReader` |
+----------------+---------------------------------------------+
| ``.sgy`` | :class:`pyvista.SegYReader` |
+----------------+---------------------------------------------+
| ``.slc`` | :class:`pyvista.SLCReader` |
+----------------+---------------------------------------------+
| ``.stl`` | :class:`pyvista.STLReader` |
+----------------+---------------------------------------------+
| ``.tif`` | :class:`pyvista.TIFFReader` |
+----------------+---------------------------------------------+
| ``.tiff`` | :class:`pyvista.TIFFReader` |
+----------------+---------------------------------------------+
| ``.tri`` | :class:`pyvista.BinaryMarchingCubesReader` |
+----------------+---------------------------------------------+
| ``.vrt`` | :class:`pyvista.ProStarReader` |
+----------------+---------------------------------------------+
| ``.vti`` | :class:`pyvista.XMLImageDataReader` |
+----------------+---------------------------------------------+
| ``.vtk`` | :class:`pyvista.VTKDataSetReader` |
+----------------+---------------------------------------------+
| ``.vtm`` | :class:`pyvista.XMLMultiBlockDataReader` |
+----------------+---------------------------------------------+
| ``.vtmb`` | :class:`pyvista.XMLMultiBlockDataReader` |
+----------------+---------------------------------------------+
| ``.vtp`` | :class:`pyvista.XMLPolyDataReader` |
+----------------+---------------------------------------------+
| ``.vtr`` | :class:`pyvista.XMLRectilinearGridReader` |
+----------------+---------------------------------------------+
| ``.vts`` | :class:`pyvista.XMLStructuredGridReader` |
+----------------+---------------------------------------------+
| ``.vtu`` | :class:`pyvista.XMLUnstructuredGridReader` |
+----------------+---------------------------------------------+
| ``.xdmf`` | :class:`pyvista.XdmfReader` |
+----------------+---------------------------------------------+
| ``.vtpd`` | :class:`pyvista.XMLPartitionedDataSetReader`|
+----------------+---------------------------------------------+
Parameters
----------
filename : str
The string path to the file to read.
force_ext : str, optional
An extension to force a specific reader to be chosen.
Returns
-------
pyvista.BaseReader
A subclass of :class:`pyvista.BaseReader` is returned based on file type.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_human(load=False)
>>> filename.split("/")[-1] # omit the path
'Human.vtp'
>>> reader = pv.get_reader(filename)
>>> reader
XMLPolyDataReader('.../Human.vtp')
>>> mesh = reader.read()
>>> mesh
PolyData ...
>>> mesh.plot(color='lightblue')
"""
ext = _get_ext_force(filename, force_ext)
try:
Reader = CLASS_READERS[ext]
except KeyError:
if Path(filename).is_dir():
if len(files := os.listdir(filename)) > 0 and all(
pathlib.Path(f).suffix == '.dcm' for f in files
):
Reader = DICOMReader
else:
raise ValueError(
f"`pyvista.get_reader` does not support reading from directory:\n\t{filename}",
)
else:
raise ValueError(
f"`pyvista.get_reader` does not support a file with the {ext} extension",
)
return Reader(filename)
class BaseVTKReader(ABC):
"""Simulate a VTK reader."""
def __init__(self: BaseVTKReader):
self._data_object = None
self._observers: list[int | Callable[[Any], Any]] = []
def SetFileName(self, filename):
"""Set file name."""
self._filename = filename
@abstractmethod
def UpdateInformation(self):
"""Update Information from file."""
def AddObserver(self, event_type, callback):
"""Add Observer that can be triggered during Update."""
self._observers.append([event_type, callback])
def RemoveObservers(self, *args):
"""Remove Observer."""
self._observers = []
def GetProgress(self):
"""GetProgress."""
return 0.0 if self._data_object is None else 1.0
def UpdateObservers(self, event_type):
"""Call matching observer."""
for event_type_allowed, observer in self._observers:
if event_type_allowed == event_type:
observer(self, event_type)
@abstractmethod
def Update(self):
"""Update Reader from file and store data internally.
Set self._data_object.
"""
def GetOutputDataObject(self, *args):
"""Return stored data."""
return self._data_object
@abstract_class
class BaseReader:
"""The Base Reader class.
The base functionality includes reading data from a file,
and allowing access to the underlying vtk reader. See
:func:`pyvista.get_reader` for an example using
a built-in subclass.
Parameters
----------
path : str
Path of the file to read.
"""
_class_reader: Any = None
_vtk_module_name: str = ''
_vtk_class_name: str = ''
def __init__(self, path):
"""Initialize Reader by setting path."""
if self._vtk_class_name:
self._reader = _lazy_vtk_instantiation(self._vtk_module_name, self._vtk_class_name)
else:
# edge case where some class customization is needed on instantiation
self._reader = self._class_reader()
self._filename = None
self._progress_bar = False
self._progress_msg = None
self.__directory = None
self._set_defaults()
self.path = path
self._set_defaults_post()
def __repr__(self):
"""Representation of a Reader object."""
return f"{self.__class__.__name__}('{self.path}')"
def show_progress(self, msg=None):
"""Show a progress bar when loading the file.
Parameters
----------
msg : str, optional
Progress bar message. Defaults to ``"Reading <file base name>"``.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_cavity(load=False)
>>> reader = pv.OpenFOAMReader(filename)
>>> reader.show_progress()
"""
self._progress_bar = True
if msg is None:
msg = f"Reading {Path(self.path).name}"
self._progress_msg = msg
def hide_progress(self):
"""Hide the progress bar when loading the file.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_cavity(load=False)
>>> reader = pv.OpenFOAMReader(filename)
>>> reader.hide_progress()
"""
self._progress_bar = False
@property
def reader(self):
"""Return the vtk Reader object.
Returns
-------
pyvista.BaseReader
An instance of the Reader object.
"""
if self._reader is None: # pragma: no cover
raise NotImplementedError
return self._reader
@property
def path(self) -> str:
"""Return or set the filename or directory of the reader.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_human(load=False)
>>> reader = pv.XMLPolyDataReader(filename)
>>> reader.path # doctest:+SKIP
'/home/user/.local/share/pyvista/examples/Human.vtp'
"""
if self._filename is not None:
return self._filename
return self.__directory
@path.setter
def path(self, path: str): # numpydoc ignore=GL08
if Path(path).is_dir():
self._set_directory(path)
elif Path(path).is_file():
self._set_filename(path)
else:
raise FileNotFoundError(f"Path '{path}' is invalid or does not exist.")
def _set_directory(self, directory):
"""Set directory and update reader."""
self._filename = None
self.__directory = directory
self.reader.SetDirectoryName(directory)
self._update_information()
def _set_filename(self, filename):
"""Set filename and update reader."""
# Private method since changing file type requires a
# different subclass.
self.__directory = None
self._filename = filename
self.reader.SetFileName(filename)
self._update_information()
def read(self):
"""Read data in file.
Returns
-------
pyvista.DataSet
PyVista Dataset.
"""
from pyvista.core.filters import _update_alg # avoid circular import
_update_alg(self.reader, progress_bar=self._progress_bar, message=self._progress_msg)
data = wrap(self.reader.GetOutputDataObject(0))
if data is None: # pragma: no cover
raise RuntimeError("File reader failed to read and/or produced no output.")
data._post_file_load_processing()
# check for any pyvista metadata
data._restore_metadata()
return data
def _update_information(self):
self.reader.UpdateInformation()
def _set_defaults(self):
"""Set defaults on reader, if needed."""
def _set_defaults_post(self):
"""Set defaults on reader post setting file, if needed."""
class PointCellDataSelection:
"""Mixin for readers that support data array selections.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_backward_facing_step(load=False)
>>> filename.split("/")[-1] # omit the path
'foam_case_0_0_0_0.case'
>>> reader = pv.get_reader(filename)
>>> reader
EnSightReader('.../foam_case_0_0_0_0.case')
>>> reader.cell_array_names
['v2', 'nut', 'k', 'nuTilda', 'p', 'omega', 'f', 'epsilon', 'U']
>>> reader.point_array_names
[]
>>> reader.all_cell_arrays_status # doctest: +NORMALIZE_WHITESPACE
{'v2': True, 'nut': True, 'k': True, 'nuTilda': True, 'p': True, 'omega': True, 'f': True, 'epsilon': True, 'U': True}
>>> reader.disable_all_cell_arrays()
>>> reader.enable_cell_array('U')
>>> mesh = reader.read() # MultiBlock mesh
>>> mesh[0].array_names
['U']
"""
@property
def number_point_arrays(self):
"""Return the number of point arrays.
Returns
-------
int
Number of point arrays.
"""
return self.reader.GetNumberOfPointArrays()
@property
def point_array_names(self):
"""Return the list of all point array names.
Returns
-------
list[str]
List of all point array names.
"""
return [self.reader.GetPointArrayName(i) for i in range(self.number_point_arrays)]
def enable_point_array(self, name):
"""Enable point array with name.
Parameters
----------
name : str
Point array name.
"""
self.reader.SetPointArrayStatus(name, 1)
def disable_point_array(self, name):
"""Disable point array with name.
Parameters
----------
name : str
Point array name.
"""
self.reader.SetPointArrayStatus(name, 0)
def point_array_status(self, name):
"""Get status of point array with name.
Parameters
----------
name : str
Point array name.
Returns
-------
bool
Whether reading the cell array is enabled.
"""
if self.reader.GetPointArrayStatus(name):
return True
return False
def enable_all_point_arrays(self):
"""Enable all point arrays."""
for name in self.point_array_names:
self.enable_point_array(name)
def disable_all_point_arrays(self):
"""Disable all point arrays."""
for name in self.point_array_names:
self.disable_point_array(name)
@property
def all_point_arrays_status(self):
"""Return the status of all point arrays.
Returns
-------
dict[str, bool]
Status of all point arrays.
"""
return {name: self.point_array_status(name) for name in self.point_array_names}
@property
def number_cell_arrays(self):
"""Return the number of cell arrays.
Returns
-------
int
Number of cell arrays.
"""
return self.reader.GetNumberOfCellArrays()
@property
def cell_array_names(self):
"""Return the list of all cell array names.
Returns
-------
list[str]
List of all cell array names.
"""
return [self.reader.GetCellArrayName(i) for i in range(self.number_cell_arrays)]
def enable_cell_array(self, name):
"""Enable cell array with name.
Parameters
----------
name : str
Cell array name.
"""
self.reader.SetCellArrayStatus(name, 1)
def disable_cell_array(self, name):
"""Disable cell array with name.
Parameters
----------
name : str
Cell array name.
"""
self.reader.SetCellArrayStatus(name, 0)
def cell_array_status(self, name):
"""Get status of cell array with name.
Parameters
----------
name : str
Cell array name.
Returns
-------
bool
Whether reading the cell array is enabled.
"""
return bool(self.reader.GetCellArrayStatus(name))
def enable_all_cell_arrays(self):
"""Enable all cell arrays."""
for name in self.cell_array_names:
self.enable_cell_array(name)
def disable_all_cell_arrays(self):
"""Disable all cell arrays."""
for name in self.cell_array_names:
self.disable_cell_array(name)
@property
def all_cell_arrays_status(self):
"""Return the status of all cell arrays.
Returns
-------
dict[str, bool]
Name and if the cell array is available.
"""
return {name: self.cell_array_status(name) for name in self.cell_array_names}
class TimeReader(ABC):
"""Abstract class for readers supporting time."""
@property
@abstractmethod
def number_time_points(self):
"""Return number of time points or iterations available to read.
Returns
-------
int
"""
@abstractmethod
def time_point_value(self, time_point):
"""Value of time point or iteration by index.
Parameters
----------
time_point : int
Time point index.
Returns
-------
float
"""
@property
def time_values(self):
"""All time or iteration values.
Returns
-------
list[float]
"""
return [self.time_point_value(idx) for idx in range(self.number_time_points)]
@property
@abstractmethod
def active_time_value(self):
"""Active time or iteration value.
Returns
-------
float
"""
@abstractmethod
def set_active_time_value(self, time_value):
"""Set active time or iteration value.
Parameters
----------
time_value : float
Time or iteration value to set as active.
"""
@abstractmethod
def set_active_time_point(self, time_point):
"""Set active time or iteration by index.
Parameters
----------
time_point : int
Time or iteration point index for setting active time.
"""
class XMLImageDataReader(BaseReader, PointCellDataSelection):
"""XML Image Data Reader for .vti files."""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLImageDataReader"
class XMLPImageDataReader(BaseReader, PointCellDataSelection):
"""Parallel XML Image Data Reader for .pvti files."""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLPImageDataReader"
class XMLRectilinearGridReader(BaseReader, PointCellDataSelection):
"""XML RectilinearGrid Reader for .vtr files.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_rectilinear_grid(load=False)
>>> filename.split("/")[-1] # omit the path
'RectilinearGrid.vtr'
>>> reader = pv.get_reader(filename)
>>> mesh = reader.read()
>>> sliced_mesh = mesh.slice('y')
>>> sliced_mesh.plot(
... scalars='Void Volume Fraction',
... cpos='xz',
... show_scalar_bar=False,
... )
"""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLRectilinearGridReader"
class XMLPRectilinearGridReader(BaseReader, PointCellDataSelection):
"""Parallel XML RectilinearGrid Reader for .pvtr files."""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLPRectilinearGridReader"
class XMLUnstructuredGridReader(BaseReader, PointCellDataSelection):
"""XML UnstructuredGrid Reader for .vtu files.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_notch_displacement(load=False)
>>> filename.split("/")[-1] # omit the path
'notch_disp.vtu'
>>> reader = pv.get_reader(filename)
>>> mesh = reader.read()
>>> mesh.plot(
... scalars="Nodal Displacement",
... component=0,
... cpos='xy',
... show_scalar_bar=False,
... )
"""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLUnstructuredGridReader"
class XMLPUnstructuredGridReader(BaseReader, PointCellDataSelection):
"""Parallel XML UnstructuredGrid Reader for .pvtu files."""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLPUnstructuredGridReader"
class XMLPolyDataReader(BaseReader, PointCellDataSelection):
"""XML PolyData Reader for .vtp files.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_cow_head(load=False)
>>> filename.split("/")[-1] # omit the path
'cowHead.vtp'
>>> reader = pv.get_reader(filename)
>>> mesh = reader.read()
>>> mesh.plot(
... cpos=((12, 3.5, -4.5), (4.5, 1.6, 0), (0, 1, 0.3)),
... clim=[0, 100],
... show_scalar_bar=False,
... )
"""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLPolyDataReader"
class XMLStructuredGridReader(BaseReader, PointCellDataSelection):
"""XML StructuredGrid Reader for .vts files.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_structured_grid(load=False)
>>> filename.split("/")[-1] # omit the path
'StructuredGrid.vts'
>>> reader = pv.get_reader(filename)
>>> mesh = reader.read()
>>> mesh.plot(style='wireframe', line_width=4, show_scalar_bar=False)
"""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLStructuredGridReader"
class XMLMultiBlockDataReader(BaseReader, PointCellDataSelection):
"""XML MultiBlock Data Reader for .vtm or .vtmb files."""
_vtk_module_name = "vtkIOXML"
_vtk_class_name = "vtkXMLMultiBlockDataReader"
# skip pydocstyle D102 check since docstring is taken from TimeReader
class EnSightReader(BaseReader, PointCellDataSelection, TimeReader):
"""EnSight Reader for .case files.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_cylinder_crossflow(load=False)
>>> filename.split("/")[-1] # omit the path
'cylinder_Re35.case'
>>> reader = pv.get_reader(filename)
>>> mesh = reader.read()
>>> mesh.plot(
... scalars="velocity",
... component=1,
... clim=[-20, 20],
... cpos='xy',
... cmap='RdBu',
... show_scalar_bar=False,
... )
"""
_vtk_module_name = "vtkIOEnSight"
_vtk_class_name = "vtkGenericEnSightReader"
def _set_filename(self, filename):
"""Set filename and update reader."""
# Private method since changing file type requires a
# different subclass.
self._filename = filename
self.reader.SetCaseFileName(filename)
self._update_information()
self._active_time_set = 0
@property
def number_time_points(self): # noqa: D102
return self.reader.GetTimeSets().GetItem(self.active_time_set).GetSize()
def time_point_value(self, time_point): # noqa: D102
return self.reader.GetTimeSets().GetItem(self.active_time_set).GetValue(time_point)
@property
def active_time_value(self): # noqa: D102
return self.reader.GetTimeValue()
def set_active_time_value(self, time_value): # noqa: D102
if time_value not in self.time_values:
raise ValueError(
f"Not a valid time {time_value} from available time values: {self.time_values}",
)
self.reader.SetTimeValue(time_value)
def set_active_time_point(self, time_point): # noqa: D102
self.reader.SetTimeValue(self.time_point_value(time_point))
@property
def active_time_set(self) -> int:
"""Return the index of the active time set of the reader.
Returns
-------
int
Index of the active time set.
"""
return self._active_time_set
def set_active_time_set(self, time_set):
"""Set the active time set by index.
Parameters
----------
time_set : int
Index of the desired time set.
Raises
------
IndexError
If the desired time set does not exist.
"""
number_time_sets = self.reader.GetTimeSets().GetNumberOfItems()
if time_set in range(number_time_sets):
self._active_time_set = time_set
else:
raise IndexError(f"Time set index {time_set} not in {range(number_time_sets)}")
# skip pydocstyle D102 check since docstring is taken from TimeReader
class OpenFOAMReader(BaseReader, PointCellDataSelection, TimeReader):
"""OpenFOAM Reader for .foam files.
By default, pyvista enables all patch arrays. This is a deviation
from the vtk default.
"""
_vtk_module_name = "vtkIOGeometry"
_vtk_class_name = "vtkOpenFOAMReader"
def _set_defaults_post(self):
self.enable_all_patch_arrays()
@property
def number_time_points(self): # noqa: D102
return self.reader.GetTimeValues().GetNumberOfValues()
def time_point_value(self, time_point): # noqa: D102
return self.reader.GetTimeValues().GetValue(time_point)
@property
def active_time_value(self): # noqa: D102
try:
value = self.reader.GetTimeValue()
except AttributeError as err: # pragma: no cover
raise AttributeError(
"Inspecting active time value only supported for vtk versions >9.1.0",
) from err
return value
def set_active_time_value(self, time_value): # noqa: D102
if time_value not in self.time_values:
raise ValueError(
f"Not a valid time {time_value} from available time values: {self.time_values}",
)
self.reader.UpdateTimeStep(time_value)
def set_active_time_point(self, time_point): # noqa: D102
self.reader.UpdateTimeStep(self.time_point_value(time_point))
@property
def decompose_polyhedra(self):
"""Whether polyhedra are to be decomposed when read.
.. warning::
Support for polyhedral decomposition has been deprecated
deprecated in VTK 9.3 and has been removed prior to VTK 9.4
Returns
-------
bool
If ``True``, decompose polyhedra into tetrahedra and pyramids.
"""
return bool(self.reader.GetDecomposePolyhedra())
@decompose_polyhedra.setter
def decompose_polyhedra(self, value): # numpydoc ignore=GL08
self.reader.SetDecomposePolyhedra(value)
@property
def skip_zero_time(self):
"""Indicate whether or not to ignore the '/0' time directory.
Returns
-------
bool
If ``True``, ignore the '/0' time directory.
Examples
--------
>>> import pyvista as pv
>>> from pyvista import examples
>>> filename = examples.download_cavity(load=False)
>>> reader = pv.OpenFOAMReader(filename)
>>> reader.skip_zero_time = False
>>> reader.skip_zero_time
False
"""
return bool(self.reader.GetSkipZeroTime())
@skip_zero_time.setter
def skip_zero_time(self, value): # numpydoc ignore=GL08
self.reader.SetSkipZeroTime(value)