Pro WPF in C# 2010: Windows Presentation Foundation in .NET 4

15.4. Animation Easing

One of the shortcomings of linear animation is that it often feels mechanical and unnatural. By comparison, sophisticated user interfaces have animated effects that model real-world systems. For example, they may use tactile push-buttons that jump back quickly when clicked but slow down as they come to rest, creating the illusion of true movement. Or, they may use maximize and minimize effects like the Windows operating system, where the speed at which the window grows or shrinks accelerates as the window nears its final size. These details are subtle, and you're not likely to notice them when they're implemented well. However, you'll almost certainly notice the clumsy feeling of less refined animations that lack these ...