public void AddPathSegment(StreamGeometryContext canvasPathBuilder, ref bool closed)
{
canvasPathBuilder.CubicBezierTo(
new Point(_control1.X, _control1.Y),
new Point(_control2.X, _control2.Y),
new Point(_vertex.X, _vertex.Y)
);
closed = false;
}
protected internal override void ApplyTo(StreamGeometryContext ctx)
{
ctx.CubicBezierTo(Point1, Point2, Point3);
}
private void DrawEllipsesByStreamGeometry(
IList <OxyRect> rects,
OxyColor fill,
OxyColor stroke,
double thickness,
EdgeRenderingMode edgeRenderingMode,
double[] dashArray,
LineJoin lineJoin)
{
const double ratio = 0.55228475; // (Math.Sqrt(2) - 1.0) * 4.0 / 3.0;
Path path = null;
StreamGeometry streamGeometry = null;
StreamGeometryContext sgc = null;
var count = 0;
bool isSolid = !fill.IsUndefined();
IBrush cachedBrush = null;
if (isSolid)
{
cachedBrush = GetCachedBrush(fill);
}
foreach (var rect in rects)
{
if (path == null)
{
path = CreateAndAdd <Path>();
SetStroke(path, stroke, thickness, edgeRenderingMode, lineJoin, dashArray, 0);
if (isSolid)
{
path.Fill = cachedBrush;
}
streamGeometry = new StreamGeometry();
sgc = streamGeometry.Open();
sgc.SetFillRule(FillRule.NonZero);
}
var a = rect.Width / 2.0;
var b = rect.Height / 2.0;
var x0 = rect.Center.X - a;
var x1 = rect.Center.X - a * ratio;
var x2 = rect.Center.X;
var x3 = rect.Center.X + a * ratio;
var x4 = rect.Center.X + a;
var y0 = rect.Center.Y - b;
var y1 = rect.Center.Y - b * ratio;
var y2 = rect.Center.Y;
var y3 = rect.Center.Y + b * ratio;
var y4 = rect.Center.Y + b;
sgc.BeginFigure(new Point(x2, y0), isSolid);
sgc.CubicBezierTo(new Point(x3, y0), new Point(x4, y1), new Point(x4, y2));
sgc.CubicBezierTo(new Point(x4, y3), new Point(x3, y4), new Point(x2, y4));
sgc.CubicBezierTo(new Point(x1, y4), new Point(x0, y3), new Point(x0, y2));
sgc.CubicBezierTo(new Point(x0, y1), new Point(x1, y0), new Point(x2, y0));
sgc.EndFigure(true);
count++;
// Must limit the number of figures, otherwise drawing errors...
if (count > MaxFiguresPerGeometry)
{
sgc.Dispose();
path.Data = streamGeometry;
path = null;
count = 0;
}
}
if (path != null)
{
sgc.Dispose();
path.Data = streamGeometry;
}
}
protected internal override void ApplyTo(StreamGeometryContext ctx)
{
ctx.CubicBezierTo(Point1, Point2, Point3);
}
public override void Curve4(float x1, float y1, float x2, float y2, float x3, float y3) => _context.CubicBezierTo(new Point(x1, y1), new Point(x2, y2), new Point(x3, y3));