Add project files.

Examples/Nodify.Playground/Converters/FlowToConnectorPositionConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows.Controls;
+using System.Windows.Data;
+
+namespace Nodify.Playground
+{
+    public class FlowToConnectorPositionConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is ConnectionViewModel connection)
+            {
+                var connector = parameter is "Input" ? connection.Input : connection.Output;
+
+                if (connector.Node is KnotNodeViewModel)
+                {
+                    var otherConnector = connection.Input == connector ? connection.Output : connection.Input;
+
+                    if (otherConnector.Node is KnotNodeViewModel)
+                    {
+                        return ToPosition(connector == connection.Input ? ConnectorFlow.Input : ConnectorFlow.Output, connector.Node.Orientation);
+                    }
+
+                    return ToPosition(otherConnector.Flow == ConnectorFlow.Output ? ConnectorFlow.Input : ConnectorFlow.Output, connector.Node.Orientation);
+                }
+
+                return ToPosition(connector.Flow, connector.Node.Orientation);
+            }
+
+            return value;
+        }
+
+        private ConnectorPosition ToPosition(ConnectorFlow flow, Orientation orientation)
+        {
+            if (orientation == Orientation.Horizontal)
+            {
+                return flow == ConnectorFlow.Output
+                    ? ConnectorPosition.Right
+                    : ConnectorPosition.Left;
+            }
+
+            return flow == ConnectorFlow.Output
+                ? ConnectorPosition.Bottom
+                : ConnectorPosition.Top;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

Examples/Nodify.Playground/Converters/FlowToDirectionConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Nodify.Playground
+{
+    public class FlowToDirectionConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is ConnectorFlow flow)
+            {
+                return flow == ConnectorFlow.Output ? ConnectionDirection.Forward : ConnectionDirection.Backward;
+            }
+
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is ConnectionDirection dir)
+            {
+                return dir == ConnectionDirection.Forward ? ConnectorFlow.Output : ConnectorFlow.Input;
+            }
+
+            return value;
+        }
+    }
+}

Examples/Nodify.Playground/Converters/UIntToRectConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Markup;
+
+namespace Nodify.Playground
+{
+    public class UIntToRectConverter : MarkupExtension, IValueConverter
+    {
+        public uint Multiplier { get; set; } = 1;
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            uint size = System.Convert.ToUInt32(value) * Multiplier;
+            return new Rect(0d, 0d, size, size);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+            => this;
+    }
+}