public async void Ellipse(RGBA color, Point center, float width, float height, bool fill = true, bool border = true, float thickness = 5)
{
// http://www.williammalone.com/briefs/how-to-draw-ellipse-html5-canvas/
var hex = ColorCache(color);
if (border)
{
await Surface.SetLineWidthAsync(thickness < 1f? 1f : thickness);
await Surface.SetStrokeStyleAsync(hex);
}
else
{
await Surface.SetStrokeStyleAsync(hex);
}
await Surface.BeginPathAsync();
{
await Surface.MoveToAsync(center.X, center.Y - (height / 2f));
await Surface.BezierCurveToAsync(
center.X + (width * 0.67f), center.Y - (height / 2f), // C1
center.X + (width * 0.67f), center.Y + (height / 2f), // C2
center.X, center.Y + (height / 2f)); // A2
await Surface.BezierCurveToAsync(
center.X - (width * 0.67f), center.Y + (height / 2f), // C3
center.X - (width * 0.67f), center.Y - (height / 2f), // C4
center.X, center.Y - (height / 2f)); // A1
if (fill)
{
await Surface.SetFillStyleAsync(hex);
await Surface.FillAsync();
}
else
{
await Surface.StrokeAsync();
}
}
await Surface.ClosePathAsync();
}
public async void Polygon(RGBA color, Point[] points, bool fill = true, bool border = false, float thickness = 5)
{
var hex = ColorCache(color);
if (border)
{
await Surface.SetLineWidthAsync(thickness < 1f? 1f : thickness);
await Surface.SetStrokeStyleAsync(ColorCache(RGBA.Black));
}
else
{
await Surface.SetStrokeStyleAsync(hex);
}
await Surface.BeginPathAsync();
{
await Surface.MoveToAsync(points[0].X, points[0].Y);
for (int i = 1; i < points.Length; i++)
{
await Surface.LineToAsync(points[i].X, points[i].Y);
}
await Surface.LineToAsync(points[0].X, points[0].Y);
if (fill)
{
await Surface.SetFillStyleAsync(hex);
await Surface.FillAsync();
}
else
{
await Surface.StrokeAsync();
}
}
await Surface.ClosePathAsync();
}
