ZigZag

class ZigZag

Bases: object

A zig-zag polyline representation of a tangle.

The geometry is a list of polyline segments, each a list of complex points. We also store a “compass” rectangle (NW, SW, SE, NE) that indicates the bounding endpoints for the left/right/top/bottom boundary of the tangle.

__init__()

Methods

__init__()
add_line(line)	Append a non-degenerate polyline to the zig-zag.
bounding_box(compass)	Return tight bounding coordinate for a given compass letter.
join()	Join polyline segments that share endpoints into longer polylines.
mirror()	Mirror through the y-axis.
move(dz)	Translate the entire zig-zag by complex offset dz.
reflect()	Reflect (mirror then rotate).
rotate()	Rotate once CCW (multiply coordinates by 1j).
set_compass(NW, SW, SE, NE)	Set the compass rectangle of the zig-zag.
smoothen()	Placeholder for point simplification (kept for compatibility).
split()	Split long nearly straight segments (used for smoothing heuristics).

Attributes

E
N
S
W
height
width

property N: complex

property S: complex

property W: float

property E: float

property height: float

property width: float

bounding_box(compass)

Return tight bounding coordinate for a given compass letter.

Parameters:

compass (str)

Return type:

complex | float

add_line(line)

Append a non-degenerate polyline to the zig-zag.

Parameters:

line (list[complex])

set_compass(NW, SW, SE, NE)

Set the compass rectangle of the zig-zag.

Parameters:

• NW (complex)

• SW (complex)

• SE (complex)

• NE (complex)

mirror()

Mirror through the y-axis.

rotate()

Rotate once CCW (multiply coordinates by 1j).

reflect()

Reflect (mirror then rotate).

move(dz)

Translate the entire zig-zag by complex offset dz.

Parameters:

dz (complex)

join()

Join polyline segments that share endpoints into longer polylines.

smoothen()

Placeholder for point simplification (kept for compatibility).

split()

Split long nearly straight segments (used for smoothing heuristics).