`GrpcCutout`#

class pyedb.workflows.utilities.cutout.GrpcCutout(edb)#

Create a clipped (cut-out) EDB cell from an existing layout. High-performance EDB cut-out utility.

Examples

>>> cut = Cutout(edb)
>>> cut.signals = ["DDR4_DQ0", "DDR4_DQ1"]
>>> cut.references = ["GND"]
>>> cut.expansion_size = 0.001
>>> polygon = cut.run()

Attributes:

signalslist[str]: List of signal net names to keep in the cut-out.
referenceslist[str]: List of reference net names to keep in the cut-out.
extent_typestr: Extent algorithm: ConvexHull (default), Conforming, Bounding.
expansion_sizefloat: Additional margin (metres) around the computed extent. Default 0.002.
use_round_cornerbool: Round the corners of the expanded extent. Default False.
custom_extentlist[tuple[float, float]] | None: Optional closed polygon [(x1,y1), …] overriding any automatic extent.
custom_extent_unitsstr: Length unit for custom_extent. Default mm.
include_voids_in_extentsbool: Include voids ≥ 5 % of the extent area when building the clip polygon.
open_cutout_at_endbool: Open the resulting cut-out database in the active Edb object. Default True.
use_pyaedt_cutoutbool: Use the PyAEDT based implementation instead of native EDB API. Default True.
smart_cutoutbool: Automatically enlarge expansion_size until all ports have reference. Default False.
expansion_factorfloat: If > 0, compute initial expansion_size from trace-width/dielectric. Default 0.
maximum_iterationsint: Maximum attempts for smart_cutout before giving up. Default 10.
number_of_threadsint: Worker threads for polygon clipping and padstack cleaning. Default 1.
remove_single_pin_componentsbool: Delete RLC components with only one pin after cut-out. Default False.
preserve_components_with_modelbool: Keep every pin of components that carry a Spice/S-parameter model. Default False.
check_terminalsbool: Grow extent until all reference terminals are inside the cut-out. Default False.
include_pingroupsbool: Ensure complete pin-groups are included (needs check_terminals). Default False.
simple_pad_checkbool: Use fast centre-point padstack check instead of bounding-box. Default True.
keep_lines_as_pathbool: Keep clipped traces as Path objects (3D Layout only). Default False.
extent_defeaturefloat: Defeature tolerance (metres) for conformal extent. Default 0.
include_partial_instancesbool: Include padstacks that only partially overlap the clip polygon. Default False.
keep_voidsbool: Retain voids that intersect the clip polygon. Default True.
The cut-out can be produced with three different extent strategies:
* ``ConvexHull`` (default)
* ``Conforming`` (tight follow of geometry)
* ``Bounding`` (simple bounding box)
Multi-threaded execution, automatic terminal expansion and smart
expansion-factor logic are supported.

Overview#

Methods

`calculate_initial_extent`	Compute a float representing the larger number between the dielectric thickness or trace width
`pins_to_preserve`
`run`

Properties

logger

Edb logger.

Attributes

Import detail#

from pyedb.workflows.utilities.cutout import GrpcCutout

Property detail#

property GrpcCutout.logger#: Edb logger.

Attribute detail#

GrpcCutout.signals: List[str] = []#

GrpcCutout.references: List[str] = []#

GrpcCutout.extent_type: str = 'ConvexHull'#

GrpcCutout.expansion_size: str | float = 0.002#

GrpcCutout.use_round_corner: bool = False#

GrpcCutout.output_file: str = ''#

GrpcCutout.open_cutout_at_end: bool = True#

GrpcCutout.use_pyaedt_cutout: bool = True#

GrpcCutout.smart_cutout: bool = False#

GrpcCutout.number_of_threads: int = 2#

GrpcCutout.use_pyaedt_extent_computing: bool = True#

GrpcCutout.extent_defeature: int | float = 0#

GrpcCutout.remove_single_pin_components: bool = False#

GrpcCutout.custom_extent: List[float, float] = None#

GrpcCutout.custom_extent_units: str = 'mm'#

GrpcCutout.include_partial_instances: bool = False#

GrpcCutout.keep_voids: bool = True#

GrpcCutout.check_terminals: bool = False#

GrpcCutout.include_pingroups: bool = False#

GrpcCutout.expansion_factor: int | float = 0#

GrpcCutout.maximum_iterations: int = 10#

GrpcCutout.preserve_components_with_model: bool = False#

GrpcCutout.simple_pad_check: bool = True#

GrpcCutout.keep_lines_as_path: bool = False#

GrpcCutout.include_voids_in_extents: bool = False#

Method detail#

GrpcCutout.calculate_initial_extent(expansion_factor)#

Compute a float representing the larger number between the dielectric thickness or trace width multiplied by the nW factor. The trace width search is limited to nets with ports attached.

Parameters:

expansion_factorfloat: Value for the width multiplier (nW factor).

Returns:

float

GrpcCutout.pins_to_preserve()#

GrpcCutout.run()#

`signals`
`references`
`extent_type`
`expansion_size`
`use_round_corner`
`output_file`
`open_cutout_at_end`
`use_pyaedt_cutout`
`smart_cutout`
`number_of_threads`
`use_pyaedt_extent_computing`
`extent_defeature`
`remove_single_pin_components`
`custom_extent`
`custom_extent_units`
`include_partial_instances`
`keep_voids`
`check_terminals`
`include_pingroups`
`expansion_factor`
`maximum_iterations`
`preserve_components_with_model`
`simple_pad_check`
`keep_lines_as_path`
`include_voids_in_extents`

GrpcCutout#