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    <p>Regarding the concentric circle case, combining Clemens's solution with a converter allows for precisely sized circles whose width can be changed dynamically and the amount of circles is set to as many will fit in the allowed area.</p> <pre><code>class SizeSpacingToCircleGroupConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (values == null) return values; var input = values.OfType&lt;double&gt;().ToArray(); if (input.Length != 3) return values; var width = input[0]; var height = input[1]; var spacing = input[2]; var halfSpacing = spacing / 2; var diameter = width &gt; height ? height : width; var lineCount = (int)Math.Floor((diameter / (2 * spacing)) - 1); if (lineCount &lt;= 0) return values; var circles = Enumerable.Range(0, lineCount).Select(i =&gt; { var radius = halfSpacing + (i * spacing); return new EllipseGeometry() { RadiusX = radius, RadiusY = radius }; }).ToArray(); var group = new GeometryGroup(); foreach (var circle in circles) group.Children.Add(circle); return group; } public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } } </code></pre> <p>And the XAML:</p> <pre><code>&lt;Rectangle Height="{StaticResource Diameter}" Width="{StaticResource Diameter}"&gt; &lt;Rectangle.Fill&gt; &lt;DrawingBrush Stretch="None"&gt; &lt;DrawingBrush.Drawing&gt; &lt;GeometryDrawing&gt; &lt;GeometryDrawing.Pen&gt; &lt;Pen Brush="{StaticResource ForegroundBrush}" Thickness="{StaticResource SpacingDiv2}"/&gt; &lt;/GeometryDrawing.Pen&gt; &lt;GeometryDrawing.Geometry&gt; &lt;MultiBinding Converter="{StaticResource SizeSpacingToCircleGroupConverter}"&gt; &lt;Binding Source="{StaticResource Diameter}" /&gt; &lt;Binding Source="{StaticResource Diameter}" /&gt; &lt;Binding Source="{StaticResource Spacing}" /&gt; &lt;/MultiBinding&gt; &lt;/GeometryDrawing.Geometry&gt; &lt;/GeometryDrawing&gt; &lt;/DrawingBrush.Drawing&gt; &lt;/DrawingBrush&gt; &lt;/Rectangle.Fill&gt; &lt;/Rectangle&gt; </code></pre> <p>In my case I'm just using doubles defined in my resource dictionary but I could easily use a binding from a view model.</p> <p>I still won't mark anything as the accepted answer however because the question was about a tiled radial sweep which could be useful for other reasons.</p>
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