VertexLine

Line (open or closed) as a VertexLoop

Generates a line with vertices interpolated between start and end points. The num_vertices parameter is crucial for morphing - shapes with the same num_vertices can morph smoothly between each other.

Constructor

VertexLine(
    start: Point2D,
    end: Point2D,
    num_vertices: int = 128,
    closed: bool = False
)

Create a line as a vertex loop

Parameters

start: Starting point (x, y)
end: Ending point (x, y)
num_vertices: Number of vertices to interpolate (important for morphing!)
closed: Whether to close the line (connects end back to start)

Methods

area

area()

Calculate the signed area of the loop

bounds

bounds()

Calculate bounding box (min_x, min_y, max_x, max_y)

centroid

centroid()

Calculate the centroid (geometric center) of the vertices

is_clockwise

is_clockwise()

Check if the loop has clockwise winding (negative area)

reverse

reverse()

Return a new VertexLoop with reversed vertex order

rotate

rotate(
    angle_degrees: float,
    center: Point2D | None = None
) -> VertexLoop

Rotate all vertices by angle_degrees around center (default: origin). Returns self for chaining.

scale

scale(sx: float, sy: float | None = None) -> VertexLoop

Scale all vertices by (sx, sy). If sy is None, uses sx for both axes. Returns self for chaining.

translate

translate(dx: float, dy: float) -> VertexLoop

Translate all vertices by (dx, dy). Returns self for chaining.

Properties

closed: Whether this loop is closed
vertices: Get vertices as list of tuples