Polygon¶

class photonforge.Polygon(vertices, holes=None)¶

Polygonal geometric object.

Parameters:

vertices (Sequence[Sequence[float] | complex]) – Vertices of the exterior boundary of the polygon.
holes – (Sequence[Sequence[Sequence[float] | complex]]): Sequence of boundaries representing holes in the polygon.

Examples

>>> polygon1 = Polygon([(0, 0), (1, 0), (1, 1.5), (0, 1)])

>>> boundary = [(-1, -2), (3, -2), (3, 2), (-1, 2)]
>>> hole1 = [(0, 0), (0, 1), (1, 1)]
>>> hole2 = [(0, -1), (2, -1), (2, 1)]
>>> polygon2 = Polygon(boundary, [hole1, hole2])

Methods

`add_gds_property`(value)	Add a custom property to this object compatible with GDSII files.
`area`()	Structure area.
`bounds`()	Calculate the structure bounds
`copy`()	Create a copy of this structure.
`mirror`([axis_endpoint, axis_origin])	Mirror this structure.
`perimeter`()	Structure perimeter.
`remove_collinear`()	Remove internal vertices from straight segments in the polygon contours.
`rotate`(rotation[, center])	Rotate this structure.
`scale`(scaling[, center])	Scale this structure.
`to_polygon`()	Create a Polygon from this structure.
`transform`([translation, rotation, scaling, ...])	Apply a transformation to this structure: `self = translate(rotate(mirror(scale(self))))`
`translate`(translation)	Translate this structure.

Attributes

`holes`	List of polygon holes (read-only).
`json`	(DEPRECATED) Json representation of this layer specification.
`properties`	Object properties.
`vertices`	Vertices of the exterior boundary of the polygon (read-only).
`x_max`	Upper bound in the x axis.
`x_mid`	Bounding box center in the x axis.
`x_min`	Lower bound in the x axis.
`y_max`	Upper bound in the y axis.
`y_mid`	Bounding box center in the y axis.
`y_min`	Lower bound in the y axis.

add_gds_property(value)¶

Add a custom property to this object compatible with GDSII files.

Parameters:

attribute (int) – Property number.
value (str) – Property value.

area()¶

Structure area.

Returns:: Area of the structure.
Return type:: float

bounds()¶

Calculate the structure bounds

Returns:: The lower-left and upper-right corners of the bounding box of the structure: ((min_x, min_y), (max_x, max_y)).
Return type:: tuple[ndarray, ndarray]

Example

>>> polygon = Polygon([(0, 1), (1, 2), (3, -1)])
>>> bounds = polygon.bounds()
>>> print(bounds)
((0.0, -1.0), (3.0, 2.0))

copy()¶

Create a copy of this structure.

Returns:: New copy.
Return type:: Polygon

holes¶

List of polygon holes (read-only).

Type:: list[ndarray]

json¶

(DEPRECATED) Json representation of this layer specification.

Type:: str

mirror(axis_endpoint=(1, 0), axis_origin=(0, 0))¶

Mirror this structure.

Parameters:

axis_endpoint (Sequence[float] | complex) – Mirror axis endpoint.
axis_origin (Sequence[float] | complex) – Mirror axis origin.

Returns:

This object.

Return type:

Polygon

perimeter()¶

Structure perimeter.

Returns:: Perimeter of the structure.
Return type:: float

properties¶

Object properties.

Type:: Properties

remove_collinear()¶

Remove internal vertices from straight segments in the polygon contours.

Returns:: This polygon.
Return type:: Polygon

rotate(rotation, center=(0, 0))¶

Rotate this structure.

Parameters:

rotation (float) – Rotation angle (in degrees).
center (Sequence[float, float] | complex) – Center of rotation.

Returns:

This object.

Return type:

Polygon

scale(scaling, center=(0, 0))¶

Scale this structure.

Parameters:

scaling (float) – Magnification factor.
center (Sequence[float, float] | complex) – Center of scaling.

Returns:

This object.

Return type:

Polygon

to_polygon()¶

Create a Polygon from this structure.

Returns:: New polygon instance.
Return type:: Polygon

Examples

>>> rectangle = Rectangle((0, 0), (2, 1), rotation=45)
>>> polygon = rectangle.to_polygon()

>>> circle = Circle(5, (0, 0), inner_radius=3)
>>> polygon = circle.to_polygon()

>>> path = Path((0, 0), 0.5).s_bend((10, 2))
>>> polygon = path.to_polygon()

transform(translation=(0, 0), rotation=0, scaling=1, x_reflection=False)¶

Apply a transformation to this structure: self = translate(rotate(mirror(scale(self))))

Parameters:

translation (Sequence[float, float] | complex) – Translation vector.
rotation (float) – Rotation angle (in degrees).
scaling (float) – Magnification factor.
x_reflection (bool) – Mirror across the horizontal axis.

Returns:

This object.

Return type:

Polygon

translate(translation)¶

Translate this structure.

Parameters:: translation (Sequence[float, float] | complex) – Translation vector.
Returns:: This object.
Return type:: Polygon

vertices¶

Vertices of the exterior boundary of the polygon (read-only).

Type:: ndarray

x_max¶

Upper bound in the x axis.

Type:: float

x_mid¶

Bounding box center in the x axis.

Type:: float

x_min¶

Lower bound in the x axis.

Type:: float

y_max¶

Upper bound in the y axis.

Type:: float

y_mid¶

Bounding box center in the y axis.

Type:: float

y_min¶

Lower bound in the y axis.

Type:: float