def import_step(self, fn):
"""
Import a STEP file generated by the OpenVSP.
:param str fn: The full path to the file.
:return: None.
:raise RuntimeError: If the file cannot be read.
"""
print('Importing OpenVSP STEP file...')
# Build a compound for geometric sets
compound = TopoDS_Compound()
BRep_Builder().MakeCompound(compound)
# Read file
step_reader = STEPControl_Reader()
status = step_reader.ReadFile(fn)
if status not in [IFSelect_RetVoid, IFSelect_RetDone]:
raise RuntimeError("Unable to read OpenVSP STEP file.")
# TODO Convert to desired units
# Interface_Static.SetCVal_("xstep.cascade.unit", "SOME UNIT HERE")
# Transfer
# OpenVSP STEP files result in one root and one shape (a compound)
step_reader.TransferRoot(1)
master_shape = step_reader.Shape(1)
# Iterate over master shape to find compounds for geometric sets. These
# sets contain the surfaces that make up the component.
iterator = TopoDS_Iterator(master_shape, True, True)
more = True
while iterator.More() and more:
print('--Processing a component...')
# The compound
compound = iterator.Value()
# Hack to handle single component for now...
if compound.ShapeType() != TopAbs_COMPOUND:
compound = master_shape
more = False
solid, is_valid, invalid_shapes = _build_solid(
compound, self._divide)
if is_valid:
print(' Successfully built a solid.')
self._solids.append(solid)
else:
print(' Failed to build a valid solid.')
self._invalid.append(solid)
self._invalid_shapes += invalid_shapes
# Next shape
iterator.Next()
print('Finished.\n')
class StepRead(object):
"""
Read a STEP file.
:param str fn: The file to read.
"""
def __init__(self, fn):
self._reader = STEPControl_Reader()
self._tr = self._reader.WS().TransferReader()
# Read file
status = self._reader.ReadFile(fn)
if status != IFSelect_RetDone:
raise RuntimeError("Error reading STEP file.")
# Convert to desired units
Interface_Static.SetCVal_("xstep.cascade.unit", Settings.units)
# Transfer
nroots = self._reader.TransferRoots()
if nroots > 0:
self._shape = Shape.wrap(self._reader.OneShape())
@property
def object(self):
"""
:return: The STEP reader object.
:rtype: OCCT.STEPControl.STEPControl_Reader
"""
return self._reader
@property
def shape(self):
"""
:return: The main shape.
:rtype: afem.topology.entities.Shape
"""
return self._shape
def name_from_shape(self, shape):
"""
Attempt to extract the name for the STEP entity that corresponds to the
shape.
:param afem.topology.entities.Shape shape: The shape.
:return: The name or None if not found.
:rtype: str or None
"""
item = self._tr.EntityFromShapeResult(shape.object, 1)
if not item:
return None
return item.Name().ToCString()
def read_step(fn):
"""
Read a STEP file and return as a single shape.
:param str fn: Filename.
:return: The shape.
:rtype: OCCT.TopoDS.TopoDS_Shape
"""
reader = STEPControl_Reader()
reader.ReadFile(fn)
reader.TransferRoots()
return reader.OneShape()
def __init__(self, fn):
self._reader = STEPControl_Reader()
self._tr = self._reader.WS().TransferReader()
# Read file
status = self._reader.ReadFile(fn)
if status != IFSelect_RetDone:
raise RuntimeError("Error reading STEP file.")
# Convert to desired units
Interface_Static.SetCVal_("xstep.cascade.unit", Settings.units)
# Transfer
nroots = self._reader.TransferRoots()
if nroots > 0:
self._shape = Shape.wrap(self._reader.OneShape())
def load_stp(filename):
""" Load a stp model """
reader = STEPControl_Reader()
status = reader.ReadFile(filename)
if status != IFSelect_RetDone:
raise ValueError("Failed to load: {}".format(filename))
reader.PrintCheckLoad(False, IFSelect_ItemsByEntity)
reader.PrintCheckTransfer(False, IFSelect_ItemsByEntity)
ok = reader.TransferRoot()
return [TopoShape(shape=reader.Shape(1))]
def read_step_file(filename):
""" read the STEP file and returns a compound
"""
step_reader = STEPControl_Reader()
status = step_reader.ReadFile(filename)
if status == IFSelect_RetDone: # check status
failsonly = False
step_reader.PrintCheckLoad(failsonly, IFSelect_ItemsByEntity)
step_reader.PrintCheckTransfer(failsonly, IFSelect_ItemsByEntity)
step_reader.TransferRoot(1)
a_shape = step_reader.Shape(1)
else:
print("Error: can't read file.")
sys.exit(0)
return a_shape
# geometry kernel. # # Copyright (C) 2016-2018 Laughlin Research, LLC ([email protected]) # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA from OCCT.Graphic3d import Graphic3d_NOM_ALUMINIUM from OCCT.STEPControl import STEPControl_Reader from OCCT.Visualization.WxViewer import ViewerWx reader = STEPControl_Reader() reader.ReadFile('./models/compressor.step') reader.TransferRoots() shape = reader.OneShape() v = ViewerWx() v.display_shape(shape, rgb=(0.5, 0.5, 0.5), material=Graphic3d_NOM_ALUMINIUM) v.start()
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
from OCCT.STEPControl import STEPControl_Reader
from OCCT.TopAbs import TopAbs_FACE
from OCCT.TopExp import TopExp_Explorer
from OCCT.Visualization.WxViewer import ShapeViewerWx
# Read the file and get the shape
reader = STEPControl_Reader()
tr = reader.WS().TransferReader()
reader.ReadFile('./models/shape_names.step')
reader.TransferRoots()
shape = reader.OneShape()
gui = ShapeViewerWx()
# Explore the faces of the shape (these are known to be named)
exp = TopExp_Explorer(shape, TopAbs_FACE)
while exp.More():
rgb = None
s = exp.Current()
exp.Next()
item = tr.EntityFromShapeResult(s, 1)
name = item.Name().ToCString()
