protected override void OnRender(DrawingContext dc)
{
if (this.Lissajous == null)
{
return;
}
this.ClipToBounds = true;
if (this.Lissajous.TheGenerator != null)
{
double semiWidth = this.ActualWidth / 2;
double semiHeight = this.ActualHeight / 2;
Pen thinPen = new Pen(Brushes.DarkGray, 1.0);
thinPen.StartLineCap = PenLineCap.Round;
thinPen.EndLineCap = PenLineCap.Round;
SimpleTransform transform = new SimpleTransform(semiWidth, semiHeight, this.Lissajous.ScaleFactor, this.Lissajous.ScaleFactor);
var center = transform.Direct(new Point(0, 0));
var phase = IsHorizontal ?
this.lissajousPanel.TheGenerator.PhaseY() :
this.lissajousPanel.TheGenerator.PhaseX() - Math.PI / 2;
var amplitude = this.IsHorizontal ?
this.lissajousPanel.TheGenerator.AmplitudeY :
this.lissajousPanel.TheGenerator.AmplitudeX;
var periphery = transform.Direct(
new Point(
amplitude * Math.Cos(phase),
amplitude * Math.Sin(phase)));
double radius = this.Distance(center, periphery);
dc.DrawEllipse(Brushes.Transparent, thinPen, center, radius, radius);
dc.DrawLine(thinPen, center, periphery);
if (this.IsHorizontal)
{
dc.DrawLine(thinPen, periphery, new Point(0, periphery.Y));
}
else
{
dc.DrawLine(thinPen, periphery, new Point(periphery.X, this.ActualHeight));
}
}
}
/// <summary>
/// Performs the rendering of the <c>Lissajous</c> curve on this panel.
/// </summary>
/// <param name="dc">Graphics context to render on.</param>
protected override void OnRender(DrawingContext dc)
{
const int MaxPens = 5;
double semiWidth = this.ActualWidth / 2;
double semiHeight = this.ActualHeight / 2;
double scaleFactor = this.ScaleFactor;
if (this.TheGenerator == null)
{
return;
}
SimpleTransform transform = new SimpleTransform(semiWidth, semiHeight, scaleFactor, scaleFactor);
Pen thinPen = new Pen(Brushes.DarkGray, 1.0f);
double y = transform.DirectY(this.TheGenerator.PointNow.Y);
Point pointEast = new Point(0, y);
Point pointWest = new Point(this.ActualWidth, y);
dc.DrawLine(thinPen, pointEast, pointWest);
double x = transform.DirectX(this.TheGenerator.PointNow.X);
Point pointNorth = new Point(x, 0);
Point pointSouth = new Point(x, this.ActualHeight);
dc.DrawLine(thinPen, pointNorth, pointSouth);
Point last = new Point(0, 0);
Pen[] pens = new Pen[MaxPens + 1];
for (int j = 0; j < MaxPens; j++)
{
var pen = new Pen(Brushes.LightGreen, MaxPens - j);
pen.StartLineCap = PenLineCap.Round;
pen.EndLineCap = PenLineCap.Round;
pens[j] = pen;
}
int i = 0;
foreach (var point in this.TheGenerator.Tail)
{
int index = i / 10;
if (index >= MaxPens)
{
index = MaxPens;
}
Point p = transform.Direct(new Point(point.X, point.Y));
if (i > 0)
{
dc.DrawLine(pens[index], last, p);
}
last = p;
i++;
}
}
/// <summary>
/// Renders the needed sinusoid.
/// </summary>
/// <param name="thinPen">Pen to be used.</param>
/// <param name="dc">Graphics environment where to render.</param>
/// <param name="toRender">Enumeration of points on the curve to render.</param>
/// <param name="getPoint">Lambda returning the point to be shown on the composing sinusoid.</param>
private void Render(SimpleTransform transform, Pen thinPen, DrawingContext dc, IEnumerable <LissaPoint> toRender, Func <LissaPoint, double, Point> getPoint)
{
bool isFirst = true;
Point lastPoint = new Point(0, 0);
double startTime = 0;
foreach (var point in toRender)
{
if (isFirst)
{
startTime = point.T;
}
Point currentPoint = transform.Direct(getPoint(point, startTime));
if (!isFirst)
{
dc.DrawLine(thinPen, lastPoint, currentPoint);
}
lastPoint = currentPoint;
isFirst = false;
}
}