/// <summary>
/// 指定动画开始的值。
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public EasyTransitionAnimationFluentContext <T> From(T value)
{
if (FromKeyFrameContext != null)
{
throw new InvalidOperationException("From 已经被指定。");
}
FromKeyFrameContext = new KeyFrameFluentContext <T>
{
Value = value,
Progress = 0
};
return(this);
}
protected override void InsertKeyFrame(KeyFrameFluentContext <Vector3> keyFrameContext)
{
switch (AnimationKind)
{
case TransitionAnimationKind.Relative:
(CompositionAnimation as KeyFrameAnimation).InsertExpressionKeyFrame(keyFrameContext.Progress, $"this.StartingValue + Vector3({keyFrameContext.Value.X}, {keyFrameContext.Value.Y}, {keyFrameContext.Value.Z})", keyFrameContext.EasingFunction);
break;
case TransitionAnimationKind.Absolute:
(CompositionAnimation as Vector3KeyFrameAnimation).InsertKeyFrame(keyFrameContext.Progress, keyFrameContext.Value, keyFrameContext.EasingFunction);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
protected override void InsertKeyFrame(KeyFrameFluentContext <Color> keyFrameContext)
{
(CompositionAnimation as ColorKeyFrameAnimation).InsertKeyFrame(keyFrameContext.Progress, keyFrameContext.Value, keyFrameContext.EasingFunction);
}
protected abstract void InsertKeyFrame(KeyFrameFluentContext <T> keyFrameContext);
