/// <summary>
/// 绘制指定的 easing 的曲线图
/// </summary>
private void DrawEasingGraph(EasingFunctionBase easingFunction)
{
graph.Children.Clear();
Path path = new Path();
PathGeometry pathGeometry = new PathGeometry();
PathFigure pathFigure = new PathFigure()
{
StartPoint = new Point(0, 0)
};
PathSegmentCollection pathSegmentCollection = new PathSegmentCollection();
// 0 - 1 之间每隔 0.005 计算出一段 LineSegment，用于显示此 0.005 时间段内的缓动曲线
for (double i = 0; i < 1; i += 0.005)
{
double x = i * graphContainer.Width;
double y = easingFunction.Ease(i) * graphContainer.Height;
LineSegment segment = new LineSegment();
segment.Point = new Point(x, y);
pathSegmentCollection.Add(segment);
}
pathFigure.Segments = pathSegmentCollection;
pathGeometry.Figures.Add(pathFigure);
path.Data = pathGeometry;
path.Stroke = new SolidColorBrush(Colors.Black);
path.StrokeThickness = 1;
graph.Children.Add(path);
}
public void Draw(EasingFunctionBase easingFunction)
{
canvas1.Children.Clear();
PathSegmentCollection pathSegments = new PathSegmentCollection();
for (double i = 0; i < 1; i += _samplingInterval)
{
double x = i * canvas1.Width;
double y = easingFunction.Ease(i) * canvas1.Height;
var segment = new LineSegment();
segment.Point = new Point(x, y);
pathSegments.Add(segment);
}
var p = new Path();
p.Stroke = new SolidColorBrush(Colors.Black);
p.StrokeThickness = 3;
PathFigureCollection figures = new PathFigureCollection();
figures.Add(new PathFigure()
{
Segments = pathSegments
});
p.Data = new PathGeometry()
{
Figures = figures
};
canvas1.Children.Add(p);
}
public override object GetCurrentValue(
object defaultOriginValue, object defaultDestinationValue,
AnimationClock animationClock)
{
if (animationClock.CurrentProgress == null)
{
return(null);
}
double progress = animationClock.CurrentProgress.Value;
if (Easing != null)
{
progress = Easing.Ease(progress);
}
Matrix from = From ?? (Matrix)defaultOriginValue;
if (To.HasValue)
{
Matrix to = To.Value;
Matrix newMatrix = new Matrix(((to.M11 - from.M11) * progress) + from.M11, 0, 0, ((to.M22 - from.M22) * progress) + from.M22,
((to.OffsetX - from.OffsetX) * progress) + from.OffsetX, ((to.OffsetY - from.OffsetY) * progress) + from.OffsetY);
return(newMatrix);
}
return(Matrix.Identity);
}
// Plots a graph of the passed easing function using the given sampling interval on the "Graph" Canvas control
private void PlotEasingFunctionGraph(EasingFunctionBase easingFunction, double samplingInterval)
{
UISettings UserSettings = new UISettings();
Graph.Children.Clear();
Path path = new Path();
PathGeometry pathGeometry = new PathGeometry();
PathFigure pathFigure = new PathFigure()
{
StartPoint = new Point(0, 0)
};
PathSegmentCollection pathSegmentCollection = new PathSegmentCollection();
// Note that an easing function is just like a regular function that operates on doubles.
// Here we plot the range of the easing function's output on the y-axis of a graph.
for (double i = 0; i < 1; i += samplingInterval)
{
double x = i * GraphContainer.Width;
double y = easingFunction.Ease(i) * GraphContainer.Height;
LineSegment segment = new LineSegment();
segment.Point = new Point(x, y);
pathSegmentCollection.Add(segment);
}
pathFigure.Segments = pathSegmentCollection;
pathGeometry.Figures.Add(pathFigure);
path.Data = pathGeometry;
path.Stroke = new SolidColorBrush(UserSettings.UIElementColor(UIElementType.ButtonText));
path.StrokeThickness = 1;
// Add the path to the Canvas
Graph.Children.Add(path);
}
internal void Pulse(TimeSpan time)
{
if (_startTime.Ticks == 0)
{
_startTime = time;
_onStart?.Invoke();
return;
}
var elapsed = time - _startTime;
if (IsPaused)
{
_startTime += elapsed;
}
else
{
var totalDuration = AutoReverse ? _duration.Add(_duration) : _duration;
while (elapsed > totalDuration && IsRepeat)
{
_startTime = time - (elapsed - totalDuration);
elapsed = time - _startTime;
}
if (elapsed > totalDuration)
{
_onEnd?.Invoke();
_tcs?.TrySetResult(true);
Dispose();
}
else
{
double normalizedTime;
if (!AutoReverse || elapsed < _duration)
{
normalizedTime = elapsed.TotalMilliseconds / _duration.TotalMilliseconds;
}
else
{
normalizedTime = 1 - (elapsed - _duration).TotalMilliseconds / _duration.TotalMilliseconds;
}
if (_easing == null)
{
_easing = new QuadraticEase()
{
EasingMode = EasingMode.EaseInOut
}
}
;
//if (_easing != null)
normalizedTime = _easing.Ease(normalizedTime);
_onPulse?.Invoke(normalizedTime);
}
}
}
private void DrawNewGraph()
{
polyline.Points.Clear();
if (easingFunction == null)
{
polyline.Points.Add(new Point(0, 0));
polyline.Points.Add(new Point(1000, 500));
return;
}
for (decimal t = 0; t <= 1; t += 0.01m)
{
double x = (double)(1000 * t);
double y = 500 * easingFunction.Ease((double)t);
polyline.Points.Add(new Point(x, y));
}
}
//Add Time
private void AddTime(double delta)
{
if (useCurrentFrom_ && !isSetCurrentFrom_)
{
isSetCurrentFrom_ = true;
from_ = 0;
if (properties_.Length > 0)
{
Type t = target_.GetType();
PropertyInfo p = t.GetRuntimeProperty(properties_[0]);
if (p != null)
{
from_ = Convert.ToDouble(p.GetValue(target_));
}
}
}
currentTime_ += delta;
currentTime_ = Math.Min(duration_ + delay_, currentTime_);
if (currentTime_ > delay_)
{
double diffSize = to_ - from_;
double timeScale = Math.Min(Math.Max((currentTime_ - delay_) / duration_, 0), 1);
double currentValue;
if (easeFunction_ == null)
{
currentValue = timeScale * diffSize + from_;
}
else
{
currentValue = easeFunction_.Ease(timeScale) * diffSize + from_;
}
Type t = target_.GetType();
foreach (string property in properties_)
{
PropertyInfo p = t.GetRuntimeProperty(property);
if (p != null && p.CanWrite)
{
p.SetValue(target_, currentValue);
}
}
}
}
private void DrawEaseCurvePath(EasingFunctionBase ease)
{
PathGeometry geometry = new PathGeometry();
_curvePath.Data = geometry;
PathFigure figure = new PathFigure();
figure.StartPoint = new Point(0.0, 100.0);
geometry.Figures.Add(figure);
double resolution = 2000;
for (int i = 0; i <= resolution; i++)
{
double d = ease.Ease(i / resolution);
LineSegment segment = new LineSegment();
segment.Point = new Point(i * 100 / resolution, 100.0 - (d * 100.0));
figure.Segments.Add(segment);
}
}
protected override double EaseInCore(double normalizedTime)
{
return(1d - _baseFunction?.Ease(1d - normalizedTime) ?? normalizedTime);
}