void OnShellSectionRendererSizeChanged(object sender, Microsoft.UI.Xaml.SizeChangedEventArgs e)
{
if (Page != null)
{
Page.ContainerArea = new Rectangle(0, 0, e.NewSize.Width, e.NewSize.Height);
}
}
private void OnSizeChanged(object sender, Microsoft.UI.Xaml.SizeChangedEventArgs e)
{
var length = (float)Math.Min(e.NewSize.Width, e.NewSize.Height) * 0.95;
var centerX = (float)e.NewSize.Width / 2;
var centerY = (float)e.NewSize.Height / 2;
var points = new List <Vector2>();
var r = length / 2;
var r2 = r * 1.06;
var r3 = r * 0.951;
int index = 0;
int segments = 100;
for (int i = 0; i < segments; i += 2)
{
var x = r * Math.Cos(i * 2 * Math.PI / segments) + centerX;
var y = r * Math.Sin(i * 2 * Math.PI / segments) + centerY;
points.Add(new Vector2((float)x, (float)y));
var currentR = index++ % 2 == 0 ? r2 : r3;
x = currentR * Math.Cos((i + 1) * 2 * Math.PI / segments) + centerX;
y = currentR * Math.Sin((i + 1) * 2 * Math.PI / segments) + centerY;
points.Add(new Vector2((float)x, (float)y));
}
points.Add(points[0]);
CanvasGeometry result;
using (var builder = new CanvasPathBuilder(null))
{
builder.BeginFigure(points[0]);
for (int i = 0; i < points.Count - 2; i += 2)
{
var currentPoint = points[i];
var centerPoint = points[i + 1];
var nextPoint = points[i + 2];
builder.AddCubicBezier(currentPoint, centerPoint, nextPoint);
}
builder.EndFigure(CanvasFigureLoop.Open);
result = CanvasGeometry.CreatePath(builder);
}
var compositor = Window.Current.Compositor;
var path = new CompositionPath(result);
var line3 = compositor.CreatePathGeometry();
line3.Path = path;
var shape3 = compositor.CreateSpriteShape(line3);
shape3.FillBrush = compositor.CreateColorBrush(Colors.Red);
var visual = compositor.CreateShapeVisual();
visual.Shapes.Add(shape3);
visual.Size = e.NewSize.ToVector2();
ElementCompositionPreview.SetElementChildVisual(this, visual);
}