offset

photonforge.offset(operand, distance, round_joins=False)

Dilate or erode a set of polygons.

Parameters:

• operand (Rectangle | Circle | Polygon | Path | Component | Reference | Iterable[Rectangle | Circle | Polygon | Path | Component | Reference]) – Polygons to be offset. All polygons are joined before the operation.

• distance (float) – Amount to dilate (positive) or erode (negative).

• round_joins (bool) – If set, substitute convex angles with round joins.

Returns:

Resulting polygons.

Return type:

list[Polygon]

Examples

>>> horizontal = Rectangle(center=(0, 0), size=(11, 2))
>>> vertical = Rectangle(center=(0, 0), size=(2, 11))
>>> outer_cross = offset([horizontal, vertical], 1, round_joins=True)
>>> inner_cross = offset([horizontal, vertical], -0.5)
>>> len(outer_cross), len(inner_cross)
(1, 1)