struct · iOS 16.0+ · SDK 27.1
@frozen struct InterpolationMethodThe ways in which line or area marks interpolate their data.
static catmullRomAlpha(alpha: number): InterpolationMethodstatic func catmullRom(alpha: CGFloat) -> InterpolationMethodInterpolate data points with Catmull-Rom spline, using the given alpha parameter. - Parameter alpha: A parameter for the Catmull-Rom spline. Use 0 for a uniform spline, 0.5 for the centripetal spline, and 1.0 for the chordal spline.
static get catmullRom(): InterpolationMethodstatic var catmullRom: InterpolationMethod { get }Interpolate data points with Catmull-Rom spline.
static get stepCenter(): InterpolationMethodstatic var stepCenter: InterpolationMethod { get }Interpolate data points with a step, or piece-wise constant function, where the data point is at the center of the step.
get description(): stringvar description: String { get }A textual representation of this instance. Calling this property directly is discouraged. Instead, convert an instance of any type to a string by using the `String(describing:)` initializer. This initializer works with any type, and uses the custom `description` property for types that conform to `CustomStringConvertible`: struct Point: CustomStringConvertible { let x: Int, y: Int var description: String { return "(\(x), \(y))" } } let p = Point(x: 21, y: 30) let s = String(describing: p) print(s) // Prints "(21, 30)" The conversion of `p` to a string in the assignment to `s` uses the `Point` type's `description` property.
static get linear(): InterpolationMethodstatic var linear: InterpolationMethod { get }Interpolate data points linearly.
static get stepEnd(): InterpolationMethodstatic var stepEnd: InterpolationMethod { get }Interpolate data points with a step, or piece-wise constant function, where the data point is at the end of the step.
static cardinalTension(tension: number): InterpolationMethodstatic func cardinal(tension: CGFloat) -> InterpolationMethodInterpolate data points with cardinal spline, using the given tension parameter. - Parameter tension: A parameter that controls the length of tangents in the cardinal spline.
static get cardinal(): InterpolationMethodstatic var cardinal: InterpolationMethod { get }Interpolate data points with cardinal spline.
static get monotone(): InterpolationMethodstatic var monotone: InterpolationMethod { get }Interpolate data points with a cubic spline that preserves monotonicity of the data.
static get stepStart(): InterpolationMethodstatic var stepStart: InterpolationMethod { get }Interpolate data points with a step, or piece-wise constant function, where the data point is at the start of the step.
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