/// <summary>
/// Renders the transformed points.
/// </summary>
/// <param name="rc">
/// The render context.
/// </param>
/// <param name="clippingRect">
/// The clipping rect.
/// </param>
/// <param name="pointsToRender">
/// The points to render.
/// </param>
protected void RenderPoints(IRenderContext rc, OxyRect clippingRect, IList <ScreenPoint> pointsToRender)
{
var screenPoints = pointsToRender;
if (this.Smooth)
{
// spline smoothing (should only be used on small datasets)
var resampledPoints = ScreenPointHelper.ResamplePoints(pointsToRender, this.MinimumSegmentLength);
screenPoints = CanonicalSplineHelper.CreateSpline(resampledPoints, 0.5, null, false, 0.25);
}
// clip the line segments with the clipping rectangle
if (this.StrokeThickness > 0 && this.ActualLineStyle != LineStyle.None)
{
this.RenderSmoothedLine(rc, clippingRect, screenPoints);
}
if (this.MarkerType != MarkerType.None)
{
rc.DrawMarkers(
pointsToRender,
clippingRect,
this.MarkerType,
this.MarkerOutline,
new[] { this.MarkerSize },
this.MarkerFill,
this.MarkerStroke,
this.MarkerStrokeThickness);
}
}
/// <summary>
/// Renders the series on the specified rendering context.
/// </summary>
/// <param name="rc">The rendering context.</param>
/// <param name="model">The owner plot model.</param>
public override void Render(IRenderContext rc, PlotModel model)
{
if (this.Points.Count == 0)
{
return;
}
if (this.XAxis == null || this.YAxis == null)
{
Trace("Axis not defined.");
return;
}
double minDistSquared = this.MinimumSegmentLength * this.MinimumSegmentLength;
var clippingRect = this.GetClippingRect();
// Transform all points to screen coordinates
var points = this.Points;
int n0 = points.Count;
IList <ScreenPoint> pts0 = new ScreenPoint[n0];
for (int i = 0; i < n0; i++)
{
pts0[i] = this.XAxis.Transform(points[i].X, points[i].Y, this.YAxis);
}
int n1 = this.points2.Count;
IList <ScreenPoint> pts1 = new ScreenPoint[n1];
for (int i = 0; i < n1; i++)
{
int j = this.Reverse2 ? n1 - 1 - i : i;
pts1[j] = this.XAxis.Transform(this.points2[i].X, this.points2[i].Y, this.YAxis);
}
if (this.Smooth)
{
var rpts0 = ScreenPointHelper.ResamplePoints(pts0, this.MinimumSegmentLength);
var rpts1 = ScreenPointHelper.ResamplePoints(pts1, this.MinimumSegmentLength);
pts0 = CanonicalSplineHelper.CreateSpline(rpts0, 0.5, null, false, 0.25);
pts1 = CanonicalSplineHelper.CreateSpline(rpts1, 0.5, null, false, 0.25);
}
// draw the clipped lines
rc.DrawClippedLine(
pts0,
clippingRect,
minDistSquared,
this.GetSelectableColor(this.ActualColor),
this.StrokeThickness,
this.ActualLineStyle,
this.LineJoin,
false);
rc.DrawClippedLine(
pts1,
clippingRect,
minDistSquared,
this.GetSelectableColor(this.ActualColor),
this.StrokeThickness,
this.ActualLineStyle,
this.LineJoin,
false);
// combine the two lines and draw the clipped area
var pts = new List <ScreenPoint>();
pts.AddRange(pts1);
pts.AddRange(pts0);
// pts = SutherlandHodgmanClipping.ClipPolygon(clippingRect, pts);
rc.DrawClippedPolygon(pts, clippingRect, minDistSquared, this.GetSelectableFillColor(this.Fill), null);
// draw the markers on top
rc.DrawMarkers(
pts0,
clippingRect,
this.MarkerType,
null,
new[] { this.MarkerSize },
this.MarkerFill,
this.MarkerStroke,
this.MarkerStrokeThickness,
1);
rc.DrawMarkers(
pts1,
clippingRect,
this.MarkerType,
null,
new[] { this.MarkerSize },
this.MarkerFill,
this.MarkerStroke,
this.MarkerStrokeThickness,
1);
}
/// <summary>
/// Force the smoothed points to be re-evaluated.
/// </summary>
protected void ResetSmoothedPoints()
{
double tolerance = Math.Abs(Math.Max(this.MaxX - this.MinX, this.MaxY - this.MinY) / ToleranceDivisor);
this.smoothedPoints = CanonicalSplineHelper.CreateSpline(this.Points, 0.5, null, false, tolerance);
}
