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@ -61,6 +61,14 @@ Each `Pattern` can contain `Ref`s pointing at other patterns, `Shape`s, and `Lab
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* 1 earth radii in nanometers (6e15) is still represented without approximation (53 bit mantissa -> 2^53 > 9e15)
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* Operations that would otherwise clip/round on are still represented approximately.
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* Memory usage is usually dominated by other Python overhead.
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- `Pattern` objects also contain `Port` information, which can be used to "snap" together
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multiple sub-components by matching up the requested port offsets and rotations.
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* Port rotations are defined as counter-clockwise angles from the +x axis.
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* Ports point into the interior of their associated device.
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* Port rotations may be `None` in the case of non-oriented ports.
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* Ports have a `ptype` string which is compared in order to catch mismatched connections at build time.
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* Ports can be exported into/imported from `Label`s stored directly in the layout,
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editable from standard tools (e.g. KLayout). A default format is provided.
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## Glossary
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jan