https://learn.microsoft.com/en-us/dotnet/api/system.windows.media.animation.rectkeyframe.interpolatevalue?view=windowsdesktop-9.0
RectKeyFrame.InterpolateValue(Rect, Double) Method (System.Windows.Media.Animation) | Microsoft...
Returns the interpolated value of a specific key frame at the progress increment provided.
windows mediarectdoublemethodsystem
https://learn.microsoft.com/zh-cn/dotnet/api/system.windows.media.animation.doublekeyframe.interpolatevalue?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
DoubleKeyFrame.InterpolateValue(Double, Double) Method (System.Windows.Media.Animation) | Microsoft...
Returns the interpolated value of a specific key frame at the progress increment provided.
windows mediadoublemethodsystemanimation