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https://github.com/amccaugh/phidl
Python GDS layout and CAD geometry creation
https://github.com/amccaugh/phidl
boolean cad gds gdsii geometry layout python
Last synced: 3 days ago
JSON representation
Python GDS layout and CAD geometry creation
- Host: GitHub
- URL: https://github.com/amccaugh/phidl
- Owner: amccaugh
- License: mit
- Created: 2016-08-05T19:25:11.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2024-07-22T17:59:38.000Z (6 months ago)
- Last Synced: 2025-01-12T12:29:12.140Z (14 days ago)
- Topics: boolean, cad, gds, gdsii, geometry, layout, python
- Language: Python
- Homepage:
- Size: 18.4 MB
- Stars: 202
- Watchers: 17
- Forks: 62
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
- Citation: CITATION.bib
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README
[](https://github.com/amccaugh/phidl/actions/workflows/pytest.yml)
[](https://github.com/amccaugh/phidl/actions/workflows/pre-commit.yml)
# PHIDL
GDS scripting for Python that's intuitive, fast, and powerful.
- [**Installation / requirements**](#installation--requirements)
- [**Tutorial + examples**](https://phidl.readthedocs.io/en/latest/tutorials.html) (or [try an interactive notebook](https://mybinder.org/v2/gh/amccaugh/phidl/master?filepath=phidl_tutorial_example.ipynb))
- [**Geometry library + function documentation**](https://phidl.readthedocs.io/en/latest/geometry_reference.html)
- [Changelog](https://github.com/amccaugh/phidl/blob/master/CHANGELOG.md) (latest update 1.7.2 on July 3, 2024)
- New KLayout-based boolean/offset/outline functions! These are under the name `pg.kl_boolean()`, `pg.kl_offset`, `pg.kl_outline()`, `pg.kl_invert()`. They utilize the excellent KLayout tile processor, which allows breaking down & parallelizing these operations--in a nutshell, these operations should be much, much faster, and they also are more robust than the gdspy/clipper implementation. To use these new functions, you must first `pip install klayout`
- Path.interpolate() now allows easy placement of objects alongside a path (e.g. for placing vias). See [the tutorial](https://phidl.readthedocs.io/en/latest/tutorials/waveguides.html#Interpolating-/-placing-objects-along-a-path) for more information
# Citation
If you found PHIDL useful, please consider citing it in (just one!) of your publications -- we appreciate it greatly. ([BibTeX](https://raw.githubusercontent.com/amccaugh/phidl/master/CITATION.bib))
- McCaughan, A. N., et. al. PHIDL: Python-based layout and geometry creation for nanolithography. *J. Vac. Sci. Technol. B* 39, 062601 (2021). http://dx.doi.org/10.1116/6.0001203
# Gallery
# Installation / requirements
- Install or upgrade with `pip install -U phidl`
- Install with `pip install -U phidl[all]` to include optional dependencies (e.g. freetype-py, klayout, rectpack)
- Python version >=3.6
## Testing
- Install with test dependencies with `pip install -U phidl[test]` (includes `all` extras as well)
- Run tests with `pytest` (or `python -m pytest`)
# About PHIDL
*fiddle (verb) - /ˈfidl/ - to make minor manual movements, especially to adjust something*
PHIDL is an open-source GDS-based CAD tool for Python that significantly extends the excellent [gdspy](https://github.com/heitzmann/gdspy). The base installation includes a large library of simple shapes (e.g. rectangles, circles), photonic structures (e.g. sine curve waveguides), and superconducting nanowire shapes (e.g. single photon detectors) that are fully parameterized. It also has a built-in quick-plotting function based on matplotlib (or Qt) that allows you view the state of any GDS object, useful when scripting geometry-making functions. It also has a [__geometry library reference__](https://phidl.readthedocs.io/) and a set of [__very thorough tutorials__](https://phidl.readthedocs.io/en/latest/tutorials.html) that will walk you through the process of getting acquainted with PHIDL.
The goal is to bring the usability of Illustrator / Inkscape drawing programs to the GDS scripting world. Like Python itself, it aims to be readable, and intuitive. For instance, when building a geometry you don't have to worry about what the exact coordinates are anymore. If you want to separate two ellipses in the x direction by 5 units, you can do things like this:
`ellipse1.xmin = ellipse2.xmax + 5`
or if you want to move then rotate one ellipse by 45 degrees you can do
`ellipse2.move([1,7]).rotate(45)`
There's a few dozen shortcuts like this that make life easier built into PHIDL--they're simple, but they make a world of difference when you just want to e.g. space a ring resonator some distance from a waveguide without having to track each and every coordinate of the shape.
[](http://amccaugh.github.io/phidl)
There's also a "port" functionality that allows you to snap together geometry like Legos without caring about where exactly the absolute coordinates of either geometry is. For instance, connecting the above misaligned rectangles is a two-line command:
It also allows you to do things like add text and create smooth or straight routing curves between "ports" of different devices, convenient for making electrical or optical connections:
Other useful functionality available are standard operations like booleans:
and less standard ones like creating outlines. A whole layout can be outlined directly in the GDS without requiring you to use Beamer (useful for positive-tone resist structures):
`pg.outline(D, distance = 0.7, layer = 4)`
The geometry library also has useful resolution test-structures built into it, for instance
```
pg.litho_calipers(num_notches = 7, offset_per_notch = 0.1)
pg.litho_steps(line_widths = [1,2,4,8,16])
pg.litho_star(num_lines = 16, line_width = 3)
```
There are also handy functions to help pack shapes into as small an area as possible:
```
pg.packer(D_list, spacing = 1.25, aspect_ratio = (2,1))
```
