public override void Update()
{
using (vkvg.Context ctx = new vkvg.Context(vkvgSurf))
{
ctx.SetSource(1, 1, 1);
ctx.Paint();
ctx.LineWidth = 6;
ctx.SetSource(0.1, 0.1, 0.1, 0.8);
ctx.MoveTo(points [0]);
ctx.CurveTo(points [1].X, points [1].Y, points [2].X, points [2].Y, points [3].X, points [3].Y);
ctx.Stroke();
ctx.LineWidth = 1;
ctx.SetSource(0.2, 0.2, 0.2, 1);
ctx.MoveTo(points[0]);
ctx.LineTo(points[1]);
ctx.MoveTo(points[2]);
ctx.LineTo(points[3]);
ctx.Stroke();
ctx.SetSource(0.5, 0.5, 1, 0.9);
for (int i = 0; i < points.Length; i++)
{
if (i == curPoint)
{
continue;
}
ctx.Arc(points[i].X, points [i].Y, cpRadius, 0, Math.PI * 2.0);
}
ctx.FillPreserve();
ctx.Stroke();
if (curPoint < 0)
{
return;
}
ctx.SetSource(1, 0.4, 0.4, 0.9);
ctx.Arc(points [curPoint].X, points [curPoint].Y, selRadius, 0, Math.PI * 2.0);
ctx.FillPreserve();
ctx.Stroke();
}
}