Class AlphaFunction

Definition

Namespace:

Tizen.NUI

Assembly:

Tizen.NUI.dll

Alpha functions are used in animations to specify the rate of change of the animation parameter over time.
Understanding an animation as a parametric function over time, the alpha function is applied to the parameter of the animation before computing the final animation value.

public class AlphaFunction : Disposable, IDisposable

Inheritance

object

Disposable

AlphaFunction

Implements

System.IDisposable

Examples

    View view = new View()
    {
        Size2D = new Size2D(100, 100),
        Position2D = new Position2D(100, 100),
        BackgroundColor = Color.Red,
    };
    Window.Default.Add(view);
    Animation animation = new Animation();
    const float destinationValue = 300.0f;
    const int startTime = 0; // animation starts at 0 second point. no delay.
    const int endTime = 5000; // animation ends at 5 second point.
    animation.AnimateTo(view, "PositionX", destinationValue, startTime, endTime, new AlphaFunction(AlphaFunction.BuiltinFunctions.EaseIn));
    animation.Play();

Constructors

AlphaFunction()

The default constructor.
Creates an alpha function object with the default built-in alpha function.

Declaration

public AlphaFunction()

AlphaFunction(Delegate)

The constructor.
Creates an alpha function object with the user-defined alpha function.

Declaration

public AlphaFunction(Delegate func)

Parameters

Type	Name	Description
System.Delegate	func	User defined function. It must be a method formatted as float alphafunction(float progress)

Remarks

Alpha function called at seperated thread with main thread. Due to the disposed infomation is not send to seperated thread, Given function might be invoked even if animation class or alpha functoin itself disposed.

AlphaFunction(BuiltinFunctions)

The constructor.
Creates an alpha function object with the built-in alpha function passed as a parameter to the constructor.

Declaration

public AlphaFunction(AlphaFunction.BuiltinFunctions function)

Parameters

Type	Name	Description
AlphaFunction.BuiltinFunctions	function	One of the built-in alpha functions.

AlphaFunction(Vector2, Vector2)

The constructor.
Creates a bezier alpha function. The bezier will have the first point at (0,0) and the end point at (1,1).

Declaration

public AlphaFunction(Vector2 controlPoint0, Vector2 controlPoint1)

Parameters

Type	Name	Description
Vector2	controlPoint0	A Vector2 which will be used as the first control point of the curve.
Vector2	controlPoint1	A Vector2 which will be used as the second control point of the curve.

Remarks

The x components of the control points will be clamped to the range [0, 1] to prevent non-monotonic curves.

Methods

GetBezierControlPoints(out Vector2, out Vector2)

Retrieves the control points of the alpha function.

Declaration

public void GetBezierControlPoints(out Vector2 controlPoint0, out Vector2 controlPoint1)

Parameters

Type	Name	Description
Vector2	controlPoint0	A Vector2 which will be used as the first control point of the curve.
Vector2	controlPoint1	A Vector2 which will be used as the second control point of the curve.

GetBuiltinFunction()

Returns the built-in function used by the alpha function.
In case no built-in function has been specified, it will return AlphaFunction::DEFAULT.

Declaration

public AlphaFunction.BuiltinFunctions GetBuiltinFunction()

Returns

Type	Description
AlphaFunction.BuiltinFunctions	One of the built-in alpha functions.

GetMode()

Returns the functioning mode of the alpha function.

Declaration

public AlphaFunction.Modes GetMode()

Returns

Type	Description
AlphaFunction.Modes	The functioning mode of the alpha function.

Implements

System.IDisposable