File size: 5,945 Bytes
985c397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | # SPDX-License-Identifier: LGPL-2.1-or-later
# ***************************************************************************
# * *
# * Copyright (c) 2022 Yorik van Havre <yorik@uncreated.net> *
# * *
# * This file is part of FreeCAD. *
# * *
# * FreeCAD 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. *
# * *
# * FreeCAD 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 FreeCAD. If not, see *
# * <https://www.gnu.org/licenses/>. *
# * *
# ***************************************************************************
"""
This module recreates the whole structure of an IFC file in FreeCAD (ie.
one FreeCAD object per IFC entity). It serves mostly as a proof of concept
and test to see how doable it is with large files.
The geometry of objects is not imported, only attributes, which are mapped
to FreeCAD properties.
The IfcOpenHouse model, included with ifcopenshell, imports in 4 sec on
my ryzen9 machine, for 2700 objects. Larger files like the King Arch file
(20 Mb / 750 000 objects) would import in 18 minutes...
"""
import time
import ifcopenshell
from PySide import QtWidgets
class ViewProvider:
"""A simple view provider to gather children"""
def __init__(self, vobj):
vobj.Proxy = self
def attach(self, vobj):
self.Object = vobj.Object
def claimChildren(self):
children = []
relprops = ["Item", "ForLayerSet"] # properties that actually store parents
for prop in self.Object.PropertiesList:
if prop.startswith("Relating") or (prop in relprops):
continue
else:
value = getattr(self.Object, prop)
if hasattr(value, "ViewObject"):
children.append(value)
elif isinstance(value, list):
for item in value:
if hasattr(item, "ViewObject"):
children.append(item)
for parent in self.Object.InList:
for prop in parent.PropertiesList:
if prop.startswith("Relating") or (prop in relprops):
value = getattr(parent, prop)
if value == self.Object:
children.append(parent)
return children
def create(ifcentity):
"""The main function that creates objects and fills properties"""
name = "Entity" + str(ifcentity.id())
obj = FreeCAD.ActiveDocument.getObject(name)
if obj:
return obj
obj = FreeCAD.ActiveDocument.addObject("App::FeaturePython", name)
if getattr(ifcentity, "Name", None):
obj.Label = ifcentity.Name
else:
obj.Label = ifcentity.is_a()
for attr, value in ifcentity.get_info().items():
if attr not in obj.PropertiesList:
if attr == "id":
attr = "StepId"
elif attr == "type":
attr = "Type"
elif attr == "Name":
continue
if hasattr(obj, attr):
continue
elif isinstance(value, int):
obj.addProperty("App::PropertyInteger", attr, "IFC", locked=True)
setattr(obj, attr, value)
elif isinstance(value, float):
obj.addProperty("App::PropertyFloat", attr, "IFC", locked=True)
setattr(obj, attr, value)
elif isinstance(value, ifcopenshell.entity_instance):
value = create(value)
obj.addProperty("App::PropertyLink", attr, "IFC", locked=True)
setattr(obj, attr, value)
elif isinstance(value, (list, tuple)) and value:
if isinstance(value[0], ifcopenshell.entity_instance):
nvalue = []
for elt in value:
nvalue.append(create(elt))
obj.addProperty("App::PropertyLinkList", attr, "IFC", locked=True)
setattr(obj, attr, nvalue)
else:
obj.addProperty("App::PropertyString", attr, "IFC", locked=True)
if value is not None:
setattr(obj, attr, str(value))
for parent in ifcfile.get_inverse(ifcentity):
create(parent)
if FreeCAD.GuiUp:
ViewProvider(obj.ViewObject)
return obj
# main
filepath = QtWidgets.QFileDialog.getOpenFileName(
None, "Select IFC File", None, "IFC Files (*.ifc)"
)[0]
stime = time.time()
ifcfile = ifcopenshell.open(filepath)
project = ifcfile.by_type("IfcProject")[0]
if not FreeCAD.ActiveDocument:
FreeCAD.newDocument()
create(project)
FreeCAD.ActiveDocument.recompute()
endtime = "%02d:%02d" % (divmod(round(time.time() - stime, 1), 60))
lenobjects = str(len(FreeCAD.ActiveDocument.Objects)) + " objects"
print("Import done:", endtime, ",", lenobjects)
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