private IList <Point> BezierHull0(IList <Point> bezier)
{
var cps = BezierExtensions.ControlPoints(bezier);
var hull = PolyAlgoPrototyper.AndrewsMonotonChainHullSSF(cps, false);
if (hull[0] != bezier[0])
{
var extend = new Point[hull.Length + 2];
Array.Copy(hull, 0, extend, 1, hull.Length);
extend[0] = bezier[0];
extend[extend.Length - 1] = bezier[bezier.Count - 1];
hull = extend;
}
return(hull);
}
public void TestBezierHull(IList <Point> bezier)
{
base.ReportPainter.PushPaint(c => {
c.SetColor(Colors.Blue);
c.SetLineWidth(2);
ContextPainterExtensions.DrawBezier(c, bezier);
c.Stroke();
});
var cps = BezierExtensions.ControlPoints(bezier);
base.ReportPainter.PushPaint(c => {
c.SetColor(Colors.Red);
c.SetLineWidth(1);
foreach (var p in cps)
{
c.Arc(p.X, p.Y, 5, 0, 360);
c.Stroke();
}
;
});
var hull = BezierExtensions.BezierHull(bezier);
base.ReportPainter.PushPaint(c => {
c.SetColor(Colors.Green);
c.SetLineWidth(1);
foreach (var p in hull)
{
c.Arc(p.X, p.Y, 3, 0, 360);
c.Fill();
}
ContextPainterExtensions.DrawPoligon(c, hull);
c.Stroke();
});
WritePainter();
}