LinePolygon2

public extension LinePolygon2
extension LinePolygon2 where Vector: Vector2Multiplicative
extension LinePolygon2 where Vector: Vector2Multiplicative, Vector.Scalar: DivisibleArithmetic
extension LinePolygon2 where Vector: Vector2Multiplicative & VectorComparable
extension LinePolygon2: VolumetricType where Vector: VectorDivisible & VectorComparable

  • Adds a new 2D vertex at the end of this polygon’s vertices list

    Declaration

    Swift

    mutating func addVertex(x: Scalar, y: Scalar)

Available where Vector: Vector2Multiplicative

  • Returns the winding number for this polygon.

    The winding number is the sum of the cross products of each adjacent edge’s slope.

    Positive values indicate clockwise orientation in an (X-Right, Y-Up) space, while negative indicate counter-clockwise.

    If this polygon has less than 3 points, .zero is returned instead.

    Declaration

    Swift

    public func winding() -> Vector.Scalar

Available where Vector: Vector2Multiplicative, Vector.Scalar: DivisibleArithmetic

  • Returns the signed area of this 2D polygon.

    Positive values indicate clockwise orientation in an (X-Right, Y-Up) space, while negative indicate counter-clockwise.

    Declaration

    Swift

    public func area() -> Vector.Scalar

Available where Vector: Vector2Multiplicative & VectorComparable

  • Returns true if this polygon is convex.

    A polygon must have at least 3 points to be considered convex.

    If the polygon self-intersects, false is returned.

    Declaration

    Swift

    public func isConvex() -> Bool

Available where Vector: VectorDivisible & VectorComparable

  • Assuming this LinePolygon2 represents a clockwise closed polygon, performs a vector-containment check against the polygon formed by this polygon’s vertices.

    Declaration

    Swift

    @inlinable
public func contains(_ vector: Vector) -> Bool