BackEase.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Animation / BackEase.cs / 1305600 / BackEase.cs
                        

                        
                            //------------------------------------------------------------------------------ 
//  Copyright (c) Microsoft Corporation, 2008
//
//  File: BackEase.cs
//----------------------------------------------------------------------------- 

namespace System.Windows.Media.Animation 
{ 
    /// 
    ///     This class implements an easing function that backs up before going to the destination. 
    /// 
    public class BackEase : EasingFunctionBase
    {
        public BackEase() 
        {
 
        } 

        ///  
        /// Amplitude Property
        /// 
        public static readonly DependencyProperty AmplitudeProperty =
            DependencyProperty.Register( 
                    "Amplitude",
                    typeof(double), 
                    typeof(BackEase), 
                    new PropertyMetadata(1.0));
 
        /// 
        /// Specifies how much the function will pull back
        /// 
        public double Amplitude 
        {
            get 
            { 
                return (double)GetValue(AmplitudeProperty);
            } 
            set
            {
                SetValueInternal(AmplitudeProperty, value);
            } 
       }
 
        protected override double EaseInCore(double normalizedTime) 
        {
            double amp = Math.Max(0.0, Amplitude); 
            return Math.Pow(normalizedTime, 3.0) - normalizedTime * amp * Math.Sin(Math.PI * normalizedTime);
        }

        protected override Freezable CreateInstanceCore() 
        {
            return new BackEase(); 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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