Skip to main content

Geometry editing for E+ idf files

Project description


|Build Status| for Python 2.7, 3.5, 3.6 via Travis

|CodeCov| via CodeCov

|Docs Status| on Read the Docs

GeomEppy is a scripting language for use with Eppy, which in turn is a
scripting language for EnergyPlus IDF files and output files.

It primarily adds functions to do with IDF geometry, including zones,
surfaces, constructions, etc.


GeomEppy requires Numpy, Shapely, and optionally Matplotlib.

`pip install geomeppy`

Full docs

Complete documentation is hosted at `Read the Docs <>`_. This covers the internals of geomeppy,
and may be subject to change. Features documented in the API section below can be relied upon to remain stable.


The API for GeomEppy depends on replacing an Eppy IDF object with a
GeomEppy IDF object. To use this, you will need to import IDF from
GeomEppy rather than directly from Eppy.

In your scripts, use ``from geomeppy import IDF`` instead of
``from eppy.modeleditor import IDF``. All other features of the current
release version of Eppy will still be available.

GeomEppy then provides a simple Python API for actions on the IDF

- Intersecting and matching surfaces

``IDF.intersect() # intersects all surfaces``

``IDF.match() # sets boundary conditions of surfaces``

``IDF.intersect_match() # intersect surfaces then set/update boundary conditions``

- Moving an IDF

``IDF.translate_to_origin() # move the whole IDF close to 0,0 on the x, y axes``

``IDF.translate([50, 20]) # move the whole IDF to x + 50, y + 20``

``IDF.translate([0, 0, 10]) # move the whole IDF to z + 10``

- Rotating an IDF

``IDF.rotate(90) # rotate the IDF 90 degrees counterclockwise around the centre of its bounding box``

``IDF.scale(2) # scale the IDF to double its size (default is on the xy axes)``

``IDF.scale(2, axes='xy') # scale the IDF to double its size (in the xy axes)``

``IDF.scale(2, axes='z') # scale the IDF to double its size (in the z axis)``

- Adding windows to external walls

``IDF.set_wwr() # set a WWR of 20% (the default) for all external walls``

``IDF.set_wwr(wwr=0.25) # set a WWR of 25% for all external walls``

``IDF.set_wwr(wwr_map={90: 0}) # set no windows on all external walls with azimuth of 90, and WWR of 20% on other walls``

``IDF.set_wwr(wwr=0, wwr_map={90: 0.3}) # set a WWR of 30% for all external walls with azimuth of 90, and no windows on other walls``

If ``wwr_map`` is passed, it overrides any value passed to ``wwr``, including
the default of 0.2. However it only overrides it on walls which have an
azimuth in the ``wwr_map``. Any omitted walls' WWR will be set to the value in
``wwr``. If you want to specify no windows for walls which are not specified in
``wwr_map``, you must also set ``wwr=None``.

- Setting constructions

``IDF.set_default_constructions() # set a name for each construction in the model``

- Viewing a simple 3D representation of an IDF

``IDF.view_model() # shows a zoomable, rotatable transparent model``

- Exporting a 3D OBJ file model


You can view the exported model `here <>`_. Just drag the .obj file
and .mtl file into the browser window.

|OBJ viewer|

- Get all surfaces in a model


- Get all surfaces in a model of a given type

``IDF.getsurfaces('wall') # only works if the surface type has been set in the IDF``

- Get all subsurfaces in a model


- Get all subsurfaces in a model of a given type

``IDF.getsubsurfaces('window') # only works if the surface type has been set in the IDF``

- Automatic geometry building

``IDF.add_block(...) # automatically adds a building block to the IDF``

This method requires some explanation. The parameters required are:


name : str
A name for the block.
coordinates : list
A list of (x, y) tuples representing the building outline.
height : float
The height of the block roof above ground level.
num_stories : int, optional
The total number of stories including basement stories. Default : 1.
below_ground_stories : int, optional
The number of stories below ground. Default : 0.
below_ground_storey_height : float, optional
The height of each basement storey. Default : 2.5.
zoning : str, optional
The rules to use in creating zones. Currently the only option is `by_storey` which sets each storey in the block as a Zone.

The block generated will have boundary conditions set correctly and any
intersections with adjacent blocks will be handled automatically. The
surface type will be set to ``wall``, ``floor``, ``ceiling`` or ``roof``
for each surface. Constructions are not set automatically so these will
need to be added afterwards in the normal way for Eppy.

Other functions

GeomEppy also provides some additional functions such as


wall = idf.newidfobject(
Surface_Type = 'wall',


- Geometry validation and correction
- Geometry simplification

.. |Build Status| image::
.. |CodeCov| image::
.. |OBJ viewer| image::

.. |Docs Status| image::
:alt: Documentation Status

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
geomeppy-0.5.2.tar.gz (46.4 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page