VertexPoint

A degenerate vertex loop with all vertices at the same point

Used to represent the collapsed state of a shape for morphing purposes. During interpolation, shapes can morph to/from a VertexPoint, creating smooth appearance/disappearance effects.

Constructor

VertexPoint(center: Point2D = Point2D(x=0, y=0), num_vertices: int = 4)

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