Cairo.Context.Arc C# (CSharp) Метод

        public void Arc(double xc, double yc, double radius, double angle1, double angle2)
        {
            CheckDisposed ();
            NativeMethods.cairo_arc (handle, xc, yc, radius, angle1, angle2);
        }

	static void draw (Context cr, int width, int height)
	{
		double xc = 0.5;
		double yc = 0.5;
		double radius = 0.4;
		double angle1 = 45.0  * (Math.PI / 180.0);  // angles are specified
		double angle2 = 180.0 * (Math.PI / 180.0);  // in radians
		
		cr.Scale (width, height);
		cr.LineWidth = 0.04;

		cr.Arc (xc, yc, radius, angle1, angle2);
		cr.Stroke ();
		
		// draw helping lines
		cr.Color = new Color(1, 0.2, 0.2, 0.6);
		cr.Arc (xc, yc, 0.05, 0, 2 * Math.PI);
		cr.Fill ();
		cr.LineWidth = 0.03;
		cr.Arc (xc, yc, radius, angle1, angle1);
		cr.LineTo (new PointD (xc, yc));
		cr.Arc (xc, yc, radius, angle2, angle2);
		cr.LineTo (new PointD (xc, yc));
		cr.Stroke ();
	}