First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Thomas Krijnen <thomas@aecgeeks.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell 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 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell 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 IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import time
+import uuid
+from typing import Optional
+
+from .file import file
+from .guid import compress
+from .ifcopenshell_wrapper import version
+
+# A quick way to setup an 'empty' IFC file, taken from:
+# http://academy.ifcopenshell.org/creating-a-simple-wall-with-property-set-and-quantity-information/
+TEMPLATE = """ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition [%(mvd)s]'),'2;1');
+FILE_NAME('%(filename)s','%(timestring)s',('%(creator)s'),('%(organization)s'),'%(application)s','%(application)s','');
+FILE_SCHEMA(('%(schema_identifier)s'));
+ENDSEC;
+DATA;
+#1=IFCPERSON($,$,'%(creator)s',$,$,$,$,$);
+#2=IFCORGANIZATION($,'%(organization)s',$,$,$);
+#3=IFCPERSONANDORGANIZATION(#1,#2,$);
+#4=IFCAPPLICATION(#2,'%(application_version)s','%(application)s','');
+#5=IFCOWNERHISTORY(#3,#4,$,.NOTDEFINED.,$,#3,#4,%(timestamp)s);
+#6=IFCDIRECTION((1.,0.,0.));
+#7=IFCDIRECTION((0.,0.,1.));
+#8=IFCCARTESIANPOINT((0.,0.,0.));
+#9=IFCAXIS2PLACEMENT3D(#8,#7,#6);
+#10=IFCDIRECTION((0.,1.));
+#11=IFCGEOMETRICREPRESENTATIONCONTEXT($,'Model',3,1.E-05,#9,#10);
+#12=IFCDIMENSIONALEXPONENTS(0,0,0,0,0,0,0);
+#13=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);
+#14=IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.);
+#15=IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.);
+#16=IFCSIUNIT(*,.PLANEANGLEUNIT.,$,.RADIAN.);
+#17=IFCMEASUREWITHUNIT(IFCPLANEANGLEMEASURE(0.017453292519943295),#16);
+#18=IFCCONVERSIONBASEDUNIT(#12,.PLANEANGLEUNIT.,'DEGREE',#17);
+#19=IFCUNITASSIGNMENT((#13,#14,#15,#18));
+#20=IFCPROJECT('%(project_globalid)s',#5,'%(project_name)s',$,$,$,$,(#11),#19);
+ENDSEC;
+END-ISO-10303-21;
+"""
+
+DEFAULTS = {
+    "application": lambda d: "IfcOpenShell contributors - IfcOpenShell - v%s" % get_pep440_version(version()),
+    "application_version": lambda d: get_pep440_version(version()),
+    "project_globalid": lambda d: compress(uuid.uuid4().hex),
+    "schema_identifier": lambda d: "IFC4",
+    "timestamp": lambda d: int(time.time()),
+    "timestring": lambda d: time.strftime("%Y-%m-%dT%H:%M:%S", time.gmtime(d.get("timestamp") or time.time())),
+    "mvd": lambda d: (
+        "ReferenceView_V1.2"
+        if d.get("schema_identifier") == "IFC4"
+        else (
+            "CoordinationView_V2.0"
+            if d.get("schema_identifier") == "IFC2X3"
+            else "ReferenceView" if d.get("schema_identifier") == "IFC4X3_ADD2" else "ReferenceView_V1.2"
+        )
+    ),
+}
+
+
+def get_pep440_version(ifcopenshell_wrapper_version):
+    """
+    Returns a PEP 440-compliant version string, valid for use with
+    `packaging.version.parse()` and compliant with the Validation Service header policy.
+    """
+    return ifcopenshell_wrapper_version.replace("-", "+", 1)
+
+
+def create(
+    filename: Optional[str] = None,
+    timestring: Optional[str] = None,
+    organization: Optional[str] = None,
+    creator: Optional[str] = None,
+    schema_identifier: Optional[str] = None,
+    application_version: Optional[str] = None,
+    timestamp: Optional[str] = None,
+    application: Optional[str] = None,
+    project_globalid: Optional[str] = None,
+    project_name: Optional[str] = None,
+    mvd: Optional[str] = None,
+) -> file:
+    d = dict(locals())
+
+    def _():
+        for var, value in d.items():
+            if value is None:
+                yield var, DEFAULTS.get(var, lambda *args: "")(d)
+
+    d.update(dict(_()))
+
+    return file.from_string(TEMPLATE % d)