mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 18:16:40 +00:00
Dion Moult
65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
|
|
# Copyright (C) 2021 Dion Moult <dion@thinkmoult.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/>.
|
|
|
|
|
|
class Usecase:
|
|
def __init__(self, file):
|
|
"""Add empty georeferencing entities to a model
|
|
|
|
By default, models are not georeferenced. Georeferencing requires two
|
|
entities: a definition of the projected coordinated reference system
|
|
(CRS) used, and the transformation parameters between any local coordinate
|
|
system and that projected CRS if any.
|
|
|
|
This function will create the entities to store the projected CRS and
|
|
map conversion transformation, but will leave all the parameters blank.
|
|
It is this the users responsibility to specify the correct
|
|
georeferencing parameters. See
|
|
ifcopenshell.api.georeference.edit_georeferencing.
|
|
|
|
:return: None
|
|
:rtype: None
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
ifcopenshell.api.run("georeference.add_georeferencing", model)
|
|
"""
|
|
self.file = file
|
|
|
|
def execute(self):
|
|
source_crs = None
|
|
for context in self.file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
|
|
if context.ContextType == "Model":
|
|
source_crs = context
|
|
break
|
|
if not source_crs:
|
|
return
|
|
projected_crs = self.file.create_entity("IfcProjectedCRS", **{"Name": ""})
|
|
self.file.create_entity(
|
|
"IfcMapConversion",
|
|
**{
|
|
"SourceCRS": source_crs,
|
|
"TargetCRS": projected_crs,
|
|
"Eastings": 0,
|
|
"Northings": 0,
|
|
"OrthogonalHeight": 0,
|
|
}
|
|
)
|