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: Optional[Point2D] = None
) -> VertexLoop

Rotate vertices in-place by angle_degrees around center

Parameters

angle_degrees: Rotation angle in degrees (positive = counter-clockwise)
center: Center of rotation (default is origin) Returns self for method chaining.

scale

scale(sx: float, sy: Optional[float] = None) -> VertexLoop

Scale vertices in-place by (sx, sy)

translate

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

Translate vertices in-place by (dx, dy)

Properties

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