140 lines
5.6 KiB
Python
140 lines
5.6 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2022 Yorik van Havre <yorik@uncreated.net> *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * This program is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with this program; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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"""
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This module recreates the whole structure of an IFC file in FreeCAD (ie.
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one FreeCAD object per IFC entity). It serves mostly as a proof of concept
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and test to see how doable it is with large files.
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The geometry of objects is not imported, only attributes, which are mapped
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to FreeCAD properties.
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The IfcOpenHouse model, included with ifcopenshell, imports in 4 sec on
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my ryzen9 machine, for 2700 objects. Larger files like the King Arch file
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(20 Mb / 750 000 objects) would import in 18 minutes...
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"""
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import time
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import ifcopenshell
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from PySide import QtWidgets
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class ViewProvider:
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"""A simple view provider to gather children"""
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def __init__(self, vobj):
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vobj.Proxy = self
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def attach(self, vobj):
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self.Object = vobj.Object
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def claimChildren(self):
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children = []
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relprops = ["Item", "ForLayerSet"] # properties that actually store parents
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for prop in self.Object.PropertiesList:
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if prop.startswith("Relating") or (prop in relprops):
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continue
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else:
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value = getattr(self.Object, prop)
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if hasattr(value, "ViewObject"):
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children.append(value)
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elif isinstance(value, list):
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for item in value:
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if hasattr(item, "ViewObject"):
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children.append(item)
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for parent in self.Object.InList:
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for prop in parent.PropertiesList:
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if prop.startswith("Relating") or (prop in relprops):
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value = getattr(parent, prop)
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if value == self.Object:
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children.append(parent)
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return children
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def create(ifcentity):
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"""The main function that creates objects and fills properties"""
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name = "Entity" + str(ifcentity.id())
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obj = FreeCAD.ActiveDocument.getObject(name)
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if obj:
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return obj
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obj = FreeCAD.ActiveDocument.addObject("App::FeaturePython", name)
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if getattr(ifcentity, "Name", None):
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obj.Label = ifcentity.Name
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else:
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obj.Label = ifcentity.is_a()
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for attr, value in ifcentity.get_info().items():
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if attr not in obj.PropertiesList:
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if attr == "id":
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attr = "StepId"
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elif attr == "type":
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attr = "Type"
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elif attr == "Name":
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continue
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if hasattr(obj, attr):
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continue
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elif isinstance(value, int):
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obj.addProperty("App::PropertyInteger", attr, "IFC")
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setattr(obj, attr, value)
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elif isinstance(value, float):
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obj.addProperty("App::PropertyFloat", attr, "IFC")
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setattr(obj, attr, value)
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elif isinstance(value, ifcopenshell.entity_instance):
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value = create(value)
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obj.addProperty("App::PropertyLink", attr, "IFC")
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setattr(obj, attr, value)
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elif isinstance(value, (list, tuple)) and value:
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if isinstance(value[0], ifcopenshell.entity_instance):
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nvalue = []
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for elt in value:
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nvalue.append(create(elt))
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obj.addProperty("App::PropertyLinkList", attr, "IFC")
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setattr(obj, attr, nvalue)
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else:
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obj.addProperty("App::PropertyString", attr, "IFC")
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if value is not None:
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setattr(obj, attr, str(value))
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for parent in ifcfile.get_inverse(ifcentity):
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create(parent)
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if FreeCAD.GuiUp:
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ViewProvider(obj.ViewObject)
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return obj
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# main
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filepath = QtWidgets.QFileDialog.getOpenFileName(
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None, "Select IFC File", None, "IFC Files (*.ifc)"
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)[0]
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stime = time.time()
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ifcfile = ifcopenshell.open(filepath)
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project = ifcfile.by_type("IfcProject")[0]
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if not FreeCAD.ActiveDocument:
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FreeCAD.newDocument()
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create(project)
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FreeCAD.ActiveDocument.recompute()
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endtime = "%02d:%02d" % (divmod(round(time.time() - stime, 1), 60))
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lenobjects = str(len(FreeCAD.ActiveDocument.Objects)) + " objects"
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print("Import done:", endtime, ",", lenobjects)
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