DYN-6840: add new boundary condition node

src/Libraries/CoreNodes/ProtoGeometryHelper.cs

@@ -0,0 +1,15 @@
+using Autodesk.DesignScript.Geometry;
+using Autodesk.DesignScript.Runtime;
+using System;
+
+namespace DSCore
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public class BoundaryConditionHelper
+    {
+        public static PanelSurfaceBoundaryCondition BoundaryConditionFromString(string val)
+        {
+            return Enum.Parse<PanelSurfaceBoundaryCondition>(val);
+        }
+    }
+}

src/Libraries/GeometryUIWpf/PanelSurfaceBoundaryConditions.cs

@@ -0,0 +1,53 @@
+using Autodesk.DesignScript.Geometry;
+using Autodesk.DesignScript.Runtime;
+using CoreNodeModels;
+using DSCore;
+using Dynamo.Graph.Nodes;
+using ProtoCore.AST.AssociativeAST;
+using System;
+using System.Collections.Generic;
+
+namespace GeometryUIWpf
+{
+    [IsVisibleInDynamoLibrary(true)]
+    [NodeName("PanelSurfaceBoundaryConditions")]
+    [NodeCategory("Geometry.PanelSurface")]
+    [IsDesignScriptCompatible]
+    public class PanelSurfaceBoundaryConditionDropDown : EnumBase<PanelSurfaceBoundaryCondition>
+    {
+        /// <summary>
+        /// Overrides the default behavior to serialize internal enumeration id 
+        /// instead of the name of the enum constant.
+        /// </summary>
+        /// <param name="item">Selected DynamoDropDownItem</param>
+        /// <returns>A string representing the internal enum id.</returns>
+        protected override string GetSelectedStringFromItem(DynamoDropDownItem item)
+        {
+            return item == null ? string.Empty : item.Item.ToString();
+        }
+
+        /// <summary>
+        /// Builds the output AST.
+        /// </summary>
+        public override IEnumerable<AssociativeNode> BuildOutputAst(List<AssociativeNode> inputAstNodes)
+        {
+            //Some of the legacy categories which were not working before will now be out of index.
+            if (SelectedIndex < 0 || SelectedIndex >= Items.Count)
+                return new[] { AstFactory.BuildNullNode() };
+
+            var unitID =
+                AstFactory.BuildStringNode(Items[SelectedIndex].Name);
+
+            var node = AstFactory.BuildFunctionCall(
+             new Func<string, PanelSurfaceBoundaryCondition>(BoundaryConditionHelper.BoundaryConditionFromString),
+             new List<AssociativeNode> { unitID });
+
+            // Assign the selected name to an actual enumeration value
+            var assign = AstFactory.BuildAssignment(GetAstIdentifierForOutputIndex(0), node);
+
+            // Return the enumeration value
+            return new List<AssociativeNode> { assign };
+        }
+    }
+
+}