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https://github.com/IfcOpenShell/IfcOpenShell.git
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ifc2ca major update - todo: update readme file
This commit is contained in:
Ioannis P. Christovasilis
@@ -0,0 +1,525 @@
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# Ifc2CA - IFC Code_Aster utility
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# Copyright (C) 2020, 2021 Ioannis P. Christovasilis <ipc@aethereng.com>
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#
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# This file is part of Ifc2CA.
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#
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# Ifc2CA 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 as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ifc2CA 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 Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Ifc2CA. If not, see <http://www.gnu.org/licenses/>.
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import json
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import ifcopenshell
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import os
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from datetime import datetime
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class CA2IFC:
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def __init__(self, inputFilename, outputFilename):
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self.inputFilename = inputFilename
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self.outputFilename = outputFilename
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self.data = None
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self.f = None
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self.reps = {}
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self.origin = None
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self.xAxis = None
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self.yAxis = None
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self.zAxis = None
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def convert(self):
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# load json file
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with open(self.inputFilename) as dataFile:
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self.data = json.load(dataFile)
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# initiate ifc file
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self.f = ifcopenshell.file()
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# create header
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self.create_header()
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# create global axes
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globalAxes = self.create_global_axes()
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localPlacement = self.f.createIfcLocalPlacement(None, globalAxes)
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# TODO: create units
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lengthUnit = self.f.createIfcSIUnit(None, "LENGTHUNIT", None, "METRE")
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unitAssignment = self.f.createIfcUnitAssignment((lengthUnit,))
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# create owner history
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ownerHistory = self.create_owner_history()
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# create representations and subrepresentations
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self.reps = self.create_reference_subrep(globalAxes)
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# create project and model
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project = self.f.createIfcProject(
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self.guid(), ownerHistory, "A Project", None, None, None, None, (self.reps["model"],), unitAssignment
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)
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model = self.f.createIfcStructuralAnalysisModel(
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self.guid(),
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ownerHistory,
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self.data["name"],
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None,
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None,
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"NOTDEFINED",
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globalAxes,
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None,
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None,
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localPlacement,
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)
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self.f.createIfcRelDeclares(self.guid(), ownerHistory, None, None, project, (model,))
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# create materials
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ifcMaterials = [None for _ in range(len(self.data["db"]["materials"]))]
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for i, material in enumerate(self.data["db"]["materials"]):
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ifcMaterials[i] = self.create_material(material)
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# create profiles
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ifcProfiles = [None for _ in range(len(self.data["db"]["profiles"]))]
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for i, profile in enumerate(self.data["db"]["profiles"]):
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ifcProfiles[i] = self.create_profile(profile)
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# create material-profile sets
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mpSets = list(
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set([el["material"] + "-" + el["profile"] for el in self.data["elements"] if el["geometryType"] == "line"])
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)
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ifcMaterialProfileSets = [None for _ in range(len(mpSets))]
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for i, mpSet in enumerate(mpSets):
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materialIndex = [mat["referenceName"] for mat in self.data["db"]["materials"]].index(mpSet.split("-")[0])
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profileIndex = [prof["referenceName"] for prof in self.data["db"]["profiles"]].index(mpSet.split("-")[1])
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material = ifcMaterials[materialIndex]
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profile = ifcProfiles[profileIndex]
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matProf = self.f.createIfcMaterialProfile(
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self.data["db"]["materials"][materialIndex]["name"]
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+ " | "
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+ self.data["db"]["profiles"][profileIndex]["profileName"],
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None,
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material,
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profile,
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)
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ifcMaterialProfileSets[i] = self.f.createIfcMaterialProfileSet(None, None, (matProf,))
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# create structural elements
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ifcElements = [None for _ in range(len(self.data["elements"]))]
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for i, el in enumerate(self.data["elements"]):
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# geometry - product definition shape
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prodDefShape = self.create_geometry(el)
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if el["geometryType"] == "line":
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# z axis TODO: group by elements
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localZAxis = self.f.createIfcDirection(tuple(el["orientation"][2]))
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# element
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ifcElements[i] = self.f.createIfcStructuralCurveMember(
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self.guid(),
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ownerHistory,
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el["name"],
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None,
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None,
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localPlacement,
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prodDefShape,
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el["predefinedType"],
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localZAxis,
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)
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if el["geometryType"] == "surface":
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ifcElements[i] = self.f.createIfcStructuralSurfaceMember(
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self.guid(),
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ownerHistory,
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el["name"],
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None,
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None,
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localPlacement,
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prodDefShape,
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el["predefinedType"],
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el["thickness"],
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)
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# create structural point connections
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ifcConnections = [None for _ in range(len(self.data["connections"]))]
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for i, conn in enumerate(self.data["connections"]):
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# geometry - product definition shape
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prodDefShape = self.create_geometry(conn)
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# boundary conditions
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if conn["appliedCondition"]:
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bc = self.create_applied_conditions(conn["appliedCondition"], conn["geometryType"])
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if conn["geometryType"] == "point":
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appliedCondition = self.f.createIfcBoundaryNodeCondition(
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None, bc["dx"], bc["dy"], bc["dz"], bc["drx"], bc["dry"], bc["drz"]
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)
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if conn["geometryType"] == "line":
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appliedCondition = self.f.createIfcBoundaryEdgeCondition(
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None, bc["dx"], bc["dy"], bc["dz"], bc["drx"], bc["dry"], bc["drz"]
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)
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if conn["geometryType"] == "surface":
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appliedCondition = self.f.createIfcBoundaryFaceCondition(None, bc["dx"], bc["dy"], bc["dz"])
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else:
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appliedCondition = None
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if conn["geometryType"] == "point":
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# local axes
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localAxes = self.create_orientation(conn["orientation"])
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# connection
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ifcConnections[i] = self.f.createIfcStructuralPointConnection(
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self.guid(),
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ownerHistory,
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conn["name"],
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None,
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None,
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localPlacement,
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prodDefShape,
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appliedCondition,
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localAxes,
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)
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if conn["geometryType"] == "line":
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# z axis TODO: group by elements
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localZAxis = self.f.createIfcDirection(tuple(conn["orientation"][2]))
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# connection
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ifcConnections[i] = self.f.createIfcStructuralCurveConnection(
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self.guid(),
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ownerHistory,
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conn["name"],
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None,
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None,
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localPlacement,
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prodDefShape,
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appliedCondition,
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localZAxis,
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)
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if conn["geometryType"] == "surface":
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ifcConnections[i] = self.f.createIfcStructuralSurfaceConnection(
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self.guid(), ownerHistory, conn["name"], None, None, localPlacement, prodDefShape, appliedCondition
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)
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# assign material-profile-sets
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for i, mpSet in enumerate(mpSets):
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groupOfElements = []
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for j, el in enumerate(self.data["elements"]):
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if el["geometryType"] == "line" and el["material"] + "-" + el["profile"] == mpSet:
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groupOfElements.append(ifcElements[j])
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if groupOfElements:
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self.f.createIfcRelAssociatesMaterial(
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self.guid(), ownerHistory, None, None, tuple(groupOfElements), ifcMaterialProfileSets[i]
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)
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# assign materials
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for i, mat in enumerate(self.data["db"]["materials"]):
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groupOfElements = []
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for j, el in enumerate(self.data["elements"]):
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if el["geometryType"] == "surface" and el["material"] == mat["referenceName"]:
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groupOfElements.append(ifcElements[j])
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if groupOfElements:
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self.f.createIfcRelAssociatesMaterial(
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self.guid(), ownerHistory, None, None, tuple(groupOfElements), ifcMaterials[i]
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)
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# create connections with elements
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for i, el in enumerate(self.data["elements"]):
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for conn in el["connections"]:
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j = [c["referenceName"] for c in self.data["connections"]].index(conn["relatedConnection"])
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geometryType = self.data["connections"][j]["geometryType"]
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if conn["appliedCondition"]:
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bc = self.create_applied_conditions(conn["appliedCondition"], geometryType)
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if geometryType == "point":
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appliedCondition = self.f.createIfcBoundaryNodeCondition(
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None, bc["dx"], bc["dy"], bc["dz"], bc["drx"], bc["dry"], bc["drz"]
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)
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if geometryType == "line":
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appliedCondition = self.f.createIfcBoundaryEdgeCondition(
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None, bc["dx"], bc["dy"], bc["dz"], bc["drx"], bc["dry"], bc["drz"]
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)
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if geometryType == "surface":
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appliedCondition = self.f.createIfcBoundaryFaceCondition(None, bc["dx"], bc["dy"], bc["dz"])
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else:
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appliedCondition = None
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# local axes
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localAxes = self.create_orientation(conn["orientation"])
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if geometryType == "point":
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if not conn["eccentricity"]:
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self.f.createIfcRelConnectsStructuralMember(
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self.guid(),
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ownerHistory,
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None,
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None,
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ifcElements[i],
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ifcConnections[j],
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appliedCondition,
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None,
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None,
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localAxes,
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)
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else:
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pointOnElement = self.f.createIfcCartesianPoint(tuple(conn["eccentricity"]["pointOnElement"]))
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vector = conn["eccentricity"]["vector"]
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connPointEcc = self.f.createIfcConnectionPointEccentricity(
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pointOnElement, None, vector[0], vector[1], vector[2]
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)
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self.f.createIfcRelConnectsWithEccentricity(
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self.guid(),
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ownerHistory,
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None,
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None,
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ifcElements[i],
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ifcConnections[j],
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appliedCondition,
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None,
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None,
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localAxes,
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connPointEcc,
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)
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if geometryType in ["line", "surface"]:
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self.f.createIfcRelConnectsStructuralMember(
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self.guid(),
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ownerHistory,
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None,
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None,
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ifcElements[i],
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ifcConnections[j],
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appliedCondition,
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None,
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None,
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localAxes,
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)
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# assign elements and connections to group
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self.f.createIfcRelAssignsToGroup(
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self.guid(), ownerHistory, None, None, tuple(ifcElements + ifcConnections), None, model
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)
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# finalize ifc file
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self.f.write(self.outputFilename)
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def guid(self):
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return ifcopenshell.guid.new()
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def create_header(self):
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self.f.wrapped_data.header.file_name.name = os.path.basename(self.outputFilename)
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def create_global_axes(self):
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self.xAxis = self.f.createIfcDirection((1.0, 0.0, 0.0))
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self.yAxis = self.f.createIfcDirection((0.0, 1.0, 0.0))
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self.zAxis = self.f.createIfcDirection((0.0, 0.0, 1.0))
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self.origin = self.f.createIfcCartesianPoint((0.0, 0.0, 0.0))
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axes = self.f.createIfcAxis2Placement3D(self.origin, self.zAxis, self.xAxis)
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return axes
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def create_orientation(self, orientation):
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xAxis = self.f.createIfcDirection(tuple(orientation[0]))
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zAxis = self.f.createIfcDirection(tuple(orientation[2]))
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axes = self.f.createIfcAxis2Placement3D(self.origin, zAxis, xAxis)
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return axes
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def create_owner_history(self):
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actor = self.f.createIfcActorRole("ENGINEER", None, None)
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person = self.f.createIfcPerson("Christovasilis", None, "Ioannis", None, None, None, (actor,))
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organization = self.f.createIfcOrganization(
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None,
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"IfcOpenShell",
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"IfcOpenShell, an open source (LGPL) software library that helps users and software developers to work with the IFC file format.",
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)
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p_o = self.f.createIfcPersonAndOrganization(person, organization)
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application = self.f.createIfcApplication(organization, "v0.0.x", "IFC2CA", "IFC2CA")
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timestamp = int(datetime.now().timestamp())
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ownerHistory = self.f.createIfcOwnerHistory(p_o, application, "READWRITE", None, None, None, None, timestamp)
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return ownerHistory
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def create_reference_subrep(self, globalAxes):
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modelRep = self.f.createIfcGeometricRepresentationContext(None, "Model", 3, 1.0e-05, globalAxes, None)
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bodySubRep = self.f.createIfcGeometricRepresentationSubContext(
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"Body", "Model", None, None, None, None, modelRep, None, "MODEL_VIEW", None
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)
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refSubRep = self.f.createIfcGeometricRepresentationSubContext(
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"Reference", "Model", None, None, None, None, modelRep, None, "GRAPH_VIEW", None
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)
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return {"model": modelRep, "body": bodySubRep, "reference": refSubRep}
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def create_material(self, material):
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ifcMaterial = self.f.createIfcMaterial(material["name"], None, material["category"])
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mechProps = []
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if "youngModulus" in material["mechProps"]:
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youngModulus = self.f.createIfcPropertySingleValue(
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"YoungModulus", None, self.f.createIfcModulusOfElasticityMeasure(material["mechProps"]["youngModulus"])
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)
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mechProps.append(youngModulus)
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if "shearModulus" in material["mechProps"]:
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shearModulus = self.f.createIfcPropertySingleValue(
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"ShearModulus", None, self.f.createIfcModulusOfElasticityMeasure(material["mechProps"]["shearModulus"])
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)
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mechProps.append(shearModulus)
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if "poissonRatio" in material["mechProps"]:
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poissonRatio = self.f.createIfcPropertySingleValue(
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"PoissonRatio", None, self.f.createIfcPositiveRatioMeasure(material["mechProps"]["poissonRatio"])
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)
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mechProps.append(poissonRatio)
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if mechProps:
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self.f.createIfcMaterialProperties(
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"Pset_MaterialMechanical", material["name"], tuple(mechProps), ifcMaterial
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)
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commonProps = []
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if "massDensity" in material["commonProps"]:
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massDensity = self.f.createIfcPropertySingleValue(
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"MassDensity", None, self.f.createIfcMassDensityMeasure(material["commonProps"]["massDensity"])
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)
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commonProps.append(massDensity)
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if commonProps:
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self.f.createIfcMaterialProperties("Pset_MaterialCommon", material["name"], tuple(commonProps), ifcMaterial)
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return ifcMaterial
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def create_profile(self, profile):
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if profile["profileShape"] == "rectangular":
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ifcProfile = self.f.createIfcRectangleProfileDef(
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profile["profileType"], profile["profileName"], None, profile["xDim"], profile["yDim"]
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)
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if profile["profileShape"] == "iSymmetrical":
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ifcProfile = self.f.createIfcIShapeProfileDef(
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profile["profileType"],
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profile["profileName"],
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None,
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profile["commonProps"]["overallWidth"],
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profile["commonProps"]["overallDepth"],
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profile["commonProps"]["webThickness"],
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profile["commonProps"]["flangeThickness"],
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profile["commonProps"]["filletRadius"],
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)
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mechProps = []
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if "massPerLength" in profile["mechProps"]:
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massPerLength = self.f.createIfcPropertySingleValue(
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"MassPerLength", None, self.f.createIfcMassPerLengthMeasure(profile["mechProps"]["massPerLength"])
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)
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mechProps.append(massPerLength)
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if "crossSectionArea" in profile["mechProps"]:
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crossSectionArea = self.f.createIfcPropertySingleValue(
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"CrossSectionArea", None, self.f.createIfcAreaMeasure(profile["mechProps"]["crossSectionArea"])
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)
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mechProps.append(crossSectionArea)
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if "momentOfInertiaY" in profile["mechProps"]:
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momentOfInertiaY = self.f.createIfcPropertySingleValue(
|
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"MomentOfInertiaY",
|
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None,
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self.f.createIfcMomentOfInertiaMeasure(profile["mechProps"]["momentOfInertiaY"]),
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)
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mechProps.append(momentOfInertiaY)
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if "momentOfInertiaZ" in profile["mechProps"]:
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momentOfInertiaZ = self.f.createIfcPropertySingleValue(
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"MomentOfInertiaZ",
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None,
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self.f.createIfcMomentOfInertiaMeasure(profile["mechProps"]["momentOfInertiaZ"]),
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)
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mechProps.append(momentOfInertiaZ)
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if "torsionalConstantX" in profile["mechProps"]:
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torsionalConstantX = self.f.createIfcPropertySingleValue(
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"TorsionalConstantX",
|
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None,
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self.f.createIfcMomentOfInertiaMeasure(profile["mechProps"]["torsionalConstantX"]),
|
||||
)
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mechProps.append(torsionalConstantX)
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if mechProps:
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||||
self.f.createIfcProfileProperties(
|
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"Pset_ProfileMechanical", profile["profileName"], tuple(mechProps), ifcProfile
|
||||
)
|
||||
|
||||
return ifcProfile
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||||
|
||||
def create_geometry(self, object):
|
||||
if object["geometryType"] == "point":
|
||||
point = self.f.createIfcCartesianPoint(tuple(object["geometry"]))
|
||||
vertex = self.f.createIfcVertexPoint(point)
|
||||
vertexTopologyRep = self.f.createIfcTopologyRepresentation(
|
||||
self.reps["reference"], "Reference", "Vertex", (vertex,)
|
||||
)
|
||||
vertexProdDefShape = self.f.createIfcProductDefinitionShape(None, None, (vertexTopologyRep,))
|
||||
|
||||
return vertexProdDefShape
|
||||
|
||||
if object["geometryType"] == "line":
|
||||
startPoint = self.f.createIfcCartesianPoint(tuple(object["geometry"][0]))
|
||||
startVertex = self.f.createIfcVertexPoint(startPoint)
|
||||
endPoint = self.f.createIfcCartesianPoint(tuple(object["geometry"][1]))
|
||||
endVertex = self.f.createIfcVertexPoint(endPoint)
|
||||
edge = self.f.createIfcEdge(startVertex, endVertex)
|
||||
edgeTopologyRep = self.f.createIfcTopologyRepresentation(
|
||||
self.reps["reference"], "Reference", "Edge", (edge,)
|
||||
)
|
||||
edgeProdDefShape = self.f.createIfcProductDefinitionShape(None, None, (edgeTopologyRep,))
|
||||
|
||||
return edgeProdDefShape
|
||||
|
||||
if object["geometryType"] == "surface":
|
||||
verts = [None for _ in range(len(object["geometry"]))]
|
||||
for i, p in enumerate(object["geometry"]):
|
||||
point = self.f.createIfcCartesianPoint(tuple(p))
|
||||
verts[i] = self.f.createIfcVertexPoint(point)
|
||||
|
||||
orientedEdges = [None for _ in range(len(object["geometry"]))]
|
||||
for i, v in enumerate(verts):
|
||||
v2Index = (i + 1) if i < len(verts) - 1 else 0
|
||||
edge = self.f.createIfcEdge(v, verts[v2Index])
|
||||
orientedEdges[i] = self.f.createIfcOrientedEdge(None, None, edge, True)
|
||||
|
||||
edgeLoop = self.f.createIfcEdgeLoop(tuple(orientedEdges))
|
||||
localAxes = self.create_orientation(object["orientation"])
|
||||
plane = self.f.createIfcPlane(localAxes)
|
||||
faceBound = self.f.createIfcFaceBound(edgeLoop, True)
|
||||
face = self.f.createIfcFaceSurface((faceBound,), plane, True)
|
||||
faceTopologyRep = self.f.createIfcTopologyRepresentation(
|
||||
self.reps["reference"], "Reference", "Face", (face,)
|
||||
)
|
||||
faceProdDefShape = self.f.createIfcProductDefinitionShape(None, None, (faceTopologyRep,))
|
||||
|
||||
return faceProdDefShape
|
||||
|
||||
def create_applied_conditions(self, bc, geometryType):
|
||||
for dof in ["dx", "dy", "dz"]:
|
||||
if isinstance(bc[dof], bool):
|
||||
bc[dof] = self.f.createIfcBoolean(bc[dof])
|
||||
else:
|
||||
if geometryType == "point":
|
||||
bc[dof] = self.f.createIfcLinearStiffnessMeasure(bc[dof])
|
||||
if geometryType == "line":
|
||||
bc[dof] = self.f.createIfcModulusOfLinearSubgradeReactionMeasure(bc[dof])
|
||||
if geometryType == "surface":
|
||||
bc[dof] = self.f.createIfcModulusOfSubgradeReactionMeasure(bc[dof])
|
||||
|
||||
for dof in ["drx", "dry", "drz"]:
|
||||
if isinstance(bc[dof], bool):
|
||||
bc[dof] = self.f.createIfcBoolean(bc[dof])
|
||||
else:
|
||||
if geometryType == "point":
|
||||
bc[dof] = self.f.createIfcRotationalStiffnessMeasure(bc[dof])
|
||||
if geometryType == "line":
|
||||
bc[dof] = self.f.createIfcModulusOfRotationalSubgradeReactionMeasure(bc[dof])
|
||||
|
||||
return bc
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
inputFilename = "grid_of_beams.json"
|
||||
outputFilename = "grid_of_beams.ifc"
|
||||
|
||||
ca2ifc = CA2IFC(inputFilename, outputFilename)
|
||||
ca2ifc.convert()
|
||||
Reference in New Issue
Block a user