def fix_shape(shp, tolerance=1e-3):
from OCCT.ShapeFix import ShapeFix_Shape
fix = ShapeFix_Shape(shp)
fix.SetFixFreeShellMode(True)
sf = fix.FixShellTool().GetObject()
sf.SetFixOrientationMode(True)
fix.LimitTolerance(tolerance)
fix.Perform()
return fix.Shape()
def __init__(self,
shape,
precision=None,
min_tol=None,
max_tol=None,
context=None):
self._tool = ShapeFix_Shape()
if precision is not None:
self._tool.SetPrecision(precision)
if min_tol is not None:
self._tool.SetMinTolerance(min_tol)
if max_tol is not None:
self._tool.SetMaxTolerance(max_tol)
if context is not None:
reshape = ShapeBuild_ReShape()
reshape.Apply(context.object)
self._tool.SetContext(reshape)
self._tool.Init(shape.object)
self._tool.Perform()
def limit_tolerance(shape, tol=1.0e-7, styp=Shape.SHAPE):
"""
Limit tolerances in a shape.
:param afem.topology.entities.Shape shape: The shape.
:param float tol: Target tolerance.
:param OCCT.TopAbs.TopAbs_ShapeEnum styp: The level of shape to set
(i.e., only vertices, only edges, only faces, or all shapes).
:return: *True* if the shape is valid after limiting tolerance, *False*
if not.
:rtype: bool
"""
# Limit tolerance then fix in case of invalid tolerances
_fix_tol.LimitTolerance(shape.object, tol, tol, styp)
ShapeFix_Shape(shape.object).Perform()
return BRepCheck_Analyzer(shape.object, False).IsValid()
class FixShape(object):
"""
Attempt to fix the shape by applying a number of general fixes.
:param afem.topology.entities.Shape shape: The shape.
:param float precision: Basic precision value.
:param float min_tol: Minimum allowed tolerance.
:param float max_tol: Maximum allowed tolerance.
:param afem.topology.entities.Shape context: The context shape.
.. note::
By default, the precision, minimum, and maximum tolerance values are
Precision::Confusion() with OCCT, which is typically 1.0e-7.
"""
def __init__(self,
shape,
precision=None,
min_tol=None,
max_tol=None,
context=None):
self._tool = ShapeFix_Shape()
if precision is not None:
self._tool.SetPrecision(precision)
if min_tol is not None:
self._tool.SetMinTolerance(min_tol)
if max_tol is not None:
self._tool.SetMaxTolerance(max_tol)
if context is not None:
reshape = ShapeBuild_ReShape()
reshape.Apply(context.object)
self._tool.SetContext(reshape)
self._tool.Init(shape.object)
self._tool.Perform()
@property
def shape(self):
"""
:return: The fixed shape.
:rtype: afem.topology.entities.Shape
"""
return Shape.wrap(self._tool.Shape())
@property
def context(self):
"""
:return: The context.
:rtype: OCCT.ShapeBuild.ShapeBuild_ReShape
"""
return self._tool.Context()
def apply(self, shape):
"""
Apply substitutions to the shape (or sub-shape) and get the result.
:param afem.topology.entities.Shape shape: The shape.
:return: The new shape.
:rtype: afem.topology.entities.Shape
"""
return Shape.wrap(self.context.Apply(shape.object))
@staticmethod
def limit_tolerance(shape, tol=1.0e-7, styp=Shape.SHAPE):
"""
Limit tolerances in a shape.
:param afem.topology.entities.Shape shape: The shape.
:param float tol: Target tolerance.
:param OCCT.TopAbs.TopAbs_ShapeEnum styp: The level of shape to set
(i.e., only vertices, only edges, only faces, or all shapes).
:return: *True* if the shape is valid after limiting tolerance, *False*
if not.
:rtype: bool
"""
# Limit tolerance then fix in case of invalid tolerances
_fix_tol.LimitTolerance(shape.object, tol, tol, styp)
ShapeFix_Shape(shape.object).Perform()
return BRepCheck_Analyzer(shape.object, False).IsValid()
@staticmethod
def set_tolerance(shape, tol, styp=Shape.SHAPE):
"""
Enforce tolerance on the given shape.
:param afem.topology.entities.Shape shape: The shape.
:param float tol: The tolerance.
:param OCCT.TopAbs.TopAbs_ShapeEnum styp: The level of shape to set
(i.e., only vertices, only edges, only faces, or all shapes).
:return: None.
"""
return _fix_tol.SetTolerance(shape.object, tol, styp)