public void DrawPad(CGContext canvas, SKPoint center, float radius, SKPaint strokePaint, float strokePaintStrokeWidth, SKPaint fillPaint, SKPaint holePaint, SKPaint strokeAccentPaint, float strokeAccentPaintStrokeWidth, SKPaint holeAccentPaint, Swipe swipe)
{
float step = radius / 7.0f;
float holeRadius = radius / 7.0f;
float orthShift = (strokePaintStrokeWidth + strokeAccentPaintStrokeWidth) / 2.0f;
float diagShift = orthShift / 1.41f;
var path = new CGPath();
path.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius, center.Y - radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius, center.Y - radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 1 * step, center.Y - radius + 2 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius - 1 * step, center.Y - radius + 4 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 1 * step, center.Y - radius + 6 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius - 1 * step, center.Y - radius + 8 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 1 * step, center.Y - radius + 10 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius - 1 * step, center.Y - radius + 12 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius, center.Y - radius + 13 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius, center.Y + radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 1 * step, center.Y + radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 2 * step, center.Y + radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 4 * step, center.Y + radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 6 * step, center.Y + radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 8 * step, center.Y + radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 10 * step, center.Y + radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 12 * step, center.Y + radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + 13 * step, center.Y + radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius, center.Y + radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius, center.Y + radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 1 * step, center.Y + radius - 2 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + 1 * step, center.Y + radius - 4 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 1 * step, center.Y + radius - 6 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + 1 * step, center.Y + radius - 8 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 1 * step, center.Y + radius - 10 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + 1 * step, center.Y + radius - 12 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius, center.Y + radius - 13 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius, center.Y - radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 1 * step, center.Y - radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 2 * step, center.Y - radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 4 * step, center.Y - radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 6 * step, center.Y - radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 8 * step, center.Y - radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 10 * step, center.Y - radius + 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 12 * step, center.Y - radius - 1 * step)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius - 13 * step, center.Y - radius)));
path.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius, center.Y - radius)));
path.CloseSubpath();
var accPathLft = new CGPath();
accPathLft.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius + orthShift, center.Y - radius + orthShift)));
accPathLft.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + orthShift, center.Y - radius + orthShift + 1 * step)));
accPathLft.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift + 1 * step, center.Y - radius + diagShift + 2 * step)));
accPathLft.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift - 1 * step, center.Y - radius + diagShift + 4 * step)));
accPathLft.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift + 1 * step, center.Y - radius + diagShift + 6 * step)));
accPathLft.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift - 1 * step, center.Y - radius + diagShift + 8 * step)));
accPathLft.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift + 1 * step, center.Y - radius + diagShift + 10 * step)));
accPathLft.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + diagShift - 1 * step, center.Y - radius + diagShift + 12 * step)));
accPathLft.MoveToPoint(CG.Point(swipe % new SKPoint(center.X - radius + orthShift, center.Y - radius + 13 * step)));
accPathLft.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X - radius + orthShift, center.Y - radius + 14 * step)));
var accPathTop = new CGPath();
accPathTop.MoveToPoint(CG.Point(swipe % new SKPoint(center.X + radius, center.Y - radius + orthShift)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift / 2 - 1 * step, center.Y - radius + orthShift)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 2 * step, center.Y - radius + diagShift + 1 * step)));
accPathTop.MoveToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 4 * step, center.Y - radius + diagShift - 1 * step)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 6 * step, center.Y - radius + diagShift + 1 * step)));
accPathTop.MoveToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 8 * step, center.Y - radius + diagShift - 1 * step)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 10 * step, center.Y - radius + diagShift + 1 * step)));
accPathTop.MoveToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift - 12 * step, center.Y - radius + diagShift - 1 * step)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + diagShift / 2 - 13 * step, center.Y - radius + orthShift)));
accPathTop.AddLineToPoint(CG.Point(swipe % new SKPoint(center.X + radius + orthShift - 14 * step, center.Y - radius + orthShift)));
canvas.AddPath(path);
canvas.SetFillColor(CG.Color(fillPaint.Color));
canvas.FillPath();
canvas.AddPath(accPathLft);
canvas.SetStrokeColor(CG.Color(strokeAccentPaint.Color));
canvas.SetLineWidth(strokeAccentPaint.StrokeWidth);
canvas.SetLineJoin(CG.LineJoin(strokeAccentPaint.StrokeJoin));
canvas.SetLineCap(CG.LineCap(strokeAccentPaint.StrokeCap));
canvas.StrokePath();
canvas.AddPath(accPathTop);
canvas.SetStrokeColor(CG.Color(strokeAccentPaint.Color));
canvas.SetLineWidth(strokeAccentPaint.StrokeWidth);
canvas.SetLineJoin(CG.LineJoin(strokeAccentPaint.StrokeJoin));
canvas.SetLineCap(CG.LineCap(strokeAccentPaint.StrokeCap));
canvas.StrokePath();
canvas.AddPath(path);
canvas.SetStrokeColor(CG.Color(strokePaint.Color));
canvas.SetLineWidth(strokePaint.StrokeWidth);
canvas.SetLineJoin(CG.LineJoin(strokePaint.StrokeJoin));
canvas.SetLineCap(CG.LineCap(strokePaint.StrokeCap));
canvas.StrokePath();
canvas.AddEllipseInRect(CG.RectFromCircle(swipe % new SKPoint(center.X + diagShift / 2, center.Y + diagShift / 2), swipe % (holeRadius + diagShift / 2)));
canvas.SetFillColor(CG.Color(holeAccentPaint.Color));
canvas.FillPath();
canvas.AddEllipseInRect(CG.RectFromCircle(swipe % center, swipe % holeRadius));
canvas.SetFillColor(CG.Color(holePaint.Color));
canvas.FillPath();
}
