CGContext.AddCurveToPoint Metode

Definisi

Ruang nama:

CoreGraphics

Rakitan:

Xamarin.iOS.dll

Menambahkan kurva Bézier kubik pada titik saat ini, dengan parameter kontrol yang ditentukan.

public void AddCurveToPoint (nfloat cp1x, nfloat cp1y, nfloat cp2x, nfloat cp2y, nfloat x, nfloat y);

member this.AddCurveToPoint : nfloat * nfloat * nfloat * nfloat * nfloat * nfloat -> unit

Parameter

cp1x

nfloat

Nilai x dari titik kontrol pertama.

cp1y

nfloat

Nilai y dari titik kontrol pertama.

cp2x

nfloat

Nilai x dari titik kontrol kedua.

cp2y

nfloat

Nilai y dari titik kontrol kedua.

x

nfloat

Nilai x di mana kurva Bézier harus berakhir.

y

nfloat

Nilai y di mana kurva Bézier harus berakhir.

Keterangan

Semua koordinat berada dalam koordinat ruang pengguna.

public override void Draw (RectangleF rect)
{
	base.Draw (rect);
	using (var ctxt = UIGraphics.GetCurrentContext ()) {
		var startingPoint = new PointF (100, 100);
		var controlPoint1 = new PointF (20, 100);
		var controlPoint2 = new PointF (4, 110);
		var endingPoint = new PointF (120, 120);

		ctxt.SetStrokeColor (UIColor.Red.CGColor);
		ctxt.MoveTo (startingPoint.X, startingPoint.Y);
		ctxt.AddCurveToPoint (controlPoint1.X, controlPoint1.Y, controlPoint2.X, controlPoint2.Y, endingPoint.X, endingPoint.Y);
		ctxt.StrokePath ();

		//Illustrate parameters
		ctxt.SetStrokeColor (UIColor.Black.CGColor);
		var sz = new SizeF (2, 2);
		Func<PointF,PointF> offset = (PointF pt) => new PointF(pt.X - 1, pt.Y - 1);
		ctxt.AddEllipseInRect (new RectangleF (offset(startingPoint),sz));
		ctxt.AddEllipseInRect (new RectangleF (offset(controlPoint1), sz));
		ctxt.AddEllipseInRect (new RectangleF (offset(controlPoint2), sz));
		ctxt.AddEllipseInRect (new RectangleF (offset(endingPoint), sz));
		ctxt.StrokePath();
	}
}