From 877d2d97bc02e835910e10eb55cbfead3ce8e8c4 Mon Sep 17 00:00:00 2001
From: lorinczandrea <lorincz.andrea@strusoft.hu>
Date: Thu, 3 Oct 2024 21:54:47 +0200
Subject: [PATCH] :construction: icons and override ToString()

#802
---
 FemDesign.Core/Bars/Bar.cs                    |   5 +-
 FemDesign.Core/Composites/CompositeSection.cs |  35 ++++---
 .../FemDesign.Grasshopper.csproj              |   9 ++
 .../Properties/Resources.Designer.cs          |  90 ++++++++++++++++++
 .../Properties/Resources.resx                 |  27 ++++++
 .../Resources/icons/DeltaBeamProfile.png      | Bin 0 -> 310 bytes
 .../icons/EffectiveCompositeSlab.png          | Bin 0 -> 219 bytes
 .../icons/FilledCruciformProfile.png          | Bin 0 -> 336 bytes
 .../Resources/icons/FilledIProfile.png        | Bin 0 -> 195 bytes
 .../Resources/icons/FilledSteelTube.png       | Bin 0 -> 598 bytes
 .../Resources/icons/HSQProfile.png            | Bin 0 -> 164 bytes
 .../Resources/icons/RHSProfile.png            | Bin 0 -> 303 bytes
 .../Resources/icons/SteelTubeWithIProfile.png | Bin 0 -> 674 bytes
 .../icons/SteelTubeWithSteelCore.png          | Bin 0 -> 701 bytes
 .../Composite/CompositeSectionDefine.cs       |  11 ++-
 .../Sections/Composite/DeltaBeamProfile.cs    |  10 +-
 .../Composite/EffectiveCompositeSlab.cs       |  17 ++--
 .../Composite/FilledCruciformProfile.cs       |   6 +-
 .../Sections/Composite/FilledIProfile.cs      |   7 +-
 .../Sections/Composite/FilledSteelTube.cs     |   6 +-
 .../Sections/Composite/HSQProfile.cs          |   6 +-
 .../Sections/Composite/RHSProfile.cs          |   7 +-
 .../Composite/SteelTubeWithIProfile.cs        |   8 +-
 .../Composite/SteelTubeWithSteelCore.cs       |   7 +-
 24 files changed, 181 insertions(+), 70 deletions(-)
 create mode 100644 FemDesign.Grasshopper/Resources/icons/DeltaBeamProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/EffectiveCompositeSlab.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/FilledCruciformProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/FilledIProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/FilledSteelTube.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/HSQProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/RHSProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/SteelTubeWithIProfile.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/SteelTubeWithSteelCore.png

diff --git a/FemDesign.Core/Bars/Bar.cs b/FemDesign.Core/Bars/Bar.cs
index 5e54c7df..557f58a2 100644
--- a/FemDesign.Core/Bars/Bar.cs
+++ b/FemDesign.Core/Bars/Bar.cs
@@ -507,7 +507,10 @@ public override string ToString()
             {
                 if (this.BarPart.HasComplexCompositeRef)
                 {
-                    return $"{this.Type} Start: {this.BarPart.Edge.Points.First()}, End: {this.BarPart.Edge.Points.Last()}, Length: {this.BarPart.Edge.Length} m, Sections: Composite section type, Material: Composite";
+                    var compositeSection = this.BarPart.ComplexCompositeObj.CompositeSections[0];
+                    List<string> compositeMaterials = compositeSection.Materials.Select(m => m.Name).ToList();
+
+                    return $"{this.Type} Start: {this.BarPart.Edge.Points.First()}, End: {this.BarPart.Edge.Points.Last()}, Length: {this.BarPart.Edge.Length} m, Section: Composite - {compositeSection.Type}, Materials: {string.Join(", ", compositeMaterials)}";
                 }
                 if (this.BarPart.HasDeltaBeamComplexSectionRef)
                 {
diff --git a/FemDesign.Core/Composites/CompositeSection.cs b/FemDesign.Core/Composites/CompositeSection.cs
index 0b4d2700..ca93989f 100644
--- a/FemDesign.Core/Composites/CompositeSection.cs
+++ b/FemDesign.Core/Composites/CompositeSection.cs
@@ -147,17 +147,17 @@ internal CompositeSection(CompositeSectionType type, List<Material> materials, L
         }
 
         /// <summary>
-        /// Create a EffectiveCompositeSlab type CompositeSection object.
+        /// Create an EffectiveCompositeSlab type CompositeSection object.
         /// </summary>
         /// <param name="steel">Steel part material.</param>
         /// <param name="concrete">Concrete part material.</param>
         /// <param name="steelProfile">Steel section from database. Can be a KKR, VKR or I-profile section type.</param>
         /// <param name="name">Composite section name.</param>
-        /// <param name="t">Slab thickness.</param>
-        /// <param name="bEff">Concrete slab effective width.</param>
-        /// <param name="th">Hunch thickness.</param>
-        /// <param name="bt">Hunch width at the top.</param>
-        /// <param name="bb">Hunch width at the bottom.</param>
+        /// <param name="t">Slab thickness [mm].</param>
+        /// <param name="bEff">Concrete slab effective width [mm].</param>
+        /// <param name="th">Hunch thickness [mm].</param>
+        /// <param name="bt">Hunch width at the top [mm].</param>
+        /// <param name="bb">Hunch width at the bottom [mm].</param>
         /// <param name="filled">True if steel section is filled with concrete, false if not.</param>
         /// <returns></returns>
         public static CompositeSection EffectiveCompositeSlab(string name, Material steel, Material concrete, Section steelProfile, double t, double bEff, double th, double bt, double bb, bool filled = false)
@@ -188,11 +188,11 @@ public static CompositeSection EffectiveCompositeSlab(string name, Material stee
         /// Create a parametric section for EffectiveCompositeSlab type CompositeSection object.
         /// </summary>
         /// <param name="steelProfile">Steel section from database. Can be a KKR, VKR or I-profile section type.</param>
-        /// <param name="t">Slab thickness.</param>
-        /// <param name="bEff">Concrete slab effective width.</param>
-        /// <param name="th">Hunch thickness.</param>
-        /// <param name="bt">Hunch width at the top.</param>
-        /// <param name="bb">Hunch width at the bottom.</param>
+        /// <param name="t">Slab thickness [mm].</param>
+        /// <param name="bEff">Concrete slab effective width [mm].</param>
+        /// <param name="th">Hunch thickness [mm].</param>
+        /// <param name="bt">Hunch width at the top [mm].</param>
+        /// <param name="bb">Hunch width at the bottom [mm].</param>
         /// <param name="filled">True if steel section is filled with concrete, false if not.</param>
         /// <returns></returns>
         internal static List<Sections.Section> CreateEffectiveCompositeSlabSection(Section steelProfile, double t, double bEff, double th, double bt, double bb, bool filled = false)
@@ -445,7 +445,6 @@ public static CompositeSection FilledHSQProfile(string name, Material steel, Mat
         /// <returns></returns>
         public static CompositeSection FilledDeltaBeamProfile(string name, Material steel, Material concrete, Section deltaBeamProfile)
         {
-            NotImplemented();
             CheckMaterialFamily(new List<Material> { steel }, concrete);
 
             // check input data
@@ -501,7 +500,7 @@ private static List<Edge> GetDeltaBeamSideEdges(List<Region> deltaBeamSteelRegio
                 throw new ArgumentException("Invalid input section! The input section must be a Deltabeam profile and the number of regions must be 4!");
 
             topPtsY = 0;
-            List<Edge> sideEdges = null;
+            List<Edge> sideEdges = new List<Edge>();
 
             foreach (var region in deltaBeamSteelRegions)
             {
@@ -515,7 +514,7 @@ private static List<Edge> GetDeltaBeamSideEdges(List<Region> deltaBeamSteelRegio
                 {
                     topPtsY = points.Select(p => p.Y).Min();
                 }
-                else if (topPts.Count != points.Count && topPts != null)
+                else if (topPts.Count != points.Count && topPts.Count != 0)
                 {
                     var edges = region.Contours[0].Edges;
                     var interiorEdg = edges.OrderBy(e => ((Vector3d)e.GetIntermediatePoint(0.5)).Length()).First();
@@ -524,7 +523,7 @@ private static List<Edge> GetDeltaBeamSideEdges(List<Region> deltaBeamSteelRegio
                 }
             }
 
-            if (sideEdges is null || topPtsY == 0)
+            if (sideEdges?.Count == 0 || topPtsY == 0)
                 throw new Exception("Invalid section geometry! Deltabeam section origin must be (0,0,0)!");
 
             return sideEdges;
@@ -1205,5 +1204,11 @@ internal void CheckCompositeSectionPartList(CompositeSectionType type, List<Comp
 
             return sections;
         }
+
+        public override string ToString()
+        {
+            List<string> parameters = ParameterDictionary.Select(d => d.Key + " = " + d.Value).ToList();
+            return $"{Type}, Materials: {string.Join(", ", this.Materials.Select(m => m.Name).ToList())}, Parameters: {string.Join(", ", parameters)}";
+        }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj b/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
index 00d58c12..e70ee2a9 100644
--- a/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
+++ b/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
@@ -939,16 +939,22 @@
     <Content Include="Resources\icons\CombDefine2.png" />
     <Content Include="Resources\icons\CombDefine3.png" />
     <None Include="Resources\icons\Config.png" />
+    <None Include="Resources\icons\DeltaBeamProfile.png" />
     <Content Include="Resources\icons\Diaphragm.bmp" />
     <Content Include="Resources\icons\DiaphragmDeconstruct.bmp" />
+    <None Include="Resources\icons\EffectiveCompositeSlab.png" />
     <Content Include="Resources\icons\ExcitationForceSettings.png" />
     <Content Include="Resources\icons\Fd_TabIcon_24_24.png" />
+    <None Include="Resources\icons\FilledCruciformProfile.png" />
+    <None Include="Resources\icons\FilledIProfile.png" />
+    <None Include="Resources\icons\FilledSteelTube.png" />
     <Content Include="Resources\icons\FootfallDefine2.png" />
     <Content Include="Resources\icons\FootfallDefine3.png" />
     <Content Include="Resources\icons\FreqDefine2.png" />
     <Content Include="Resources\icons\FreqDefine3.png" />
     <Content Include="Resources\icons\GroundAccelerationDefine2.png" />
     <Content Include="Resources\icons\GroundAccelerationDefine3.png" />
+    <None Include="Resources\icons\HSQProfile.png" />
     <Content Include="Resources\icons\ImperfectionDefine2.png" />
     <Content Include="Resources\icons\ImperfectionDefine3.png" />
     <Content Include="Resources\icons\LabelledSection.png" />
@@ -957,10 +963,13 @@
     <Content Include="Resources\icons\PeriodicExcitationDefine2.png" />
     <Content Include="Resources\icons\PeriodicExcitationDefine3.png" />
     <None Include="Resources\icons\PeriodicExcitationLoad.png" />
+    <None Include="Resources\icons\RHSProfile.png" />
     <Content Include="Resources\icons\StabilityDefine2.png" />
     <Content Include="Resources\icons\StabilityDefine3.png" />
     <Content Include="Resources\icons\StageDefine2.png" />
     <Content Include="Resources\icons\StageDefine3.png" />
+    <None Include="Resources\icons\SteelTubeWithIProfile.png" />
+    <None Include="Resources\icons\SteelTubeWithSteelCore.png" />
     <Content Include="Resources\icons\StiffnessMatrix4Type.bmp" />
     <None Include="Resources\icons\ExcitationForceDiagram.png" />
     <None Include="Resources\icons\ExcitationForceCombination.png" />
diff --git a/FemDesign.Grasshopper/Properties/Resources.Designer.cs b/FemDesign.Grasshopper/Properties/Resources.Designer.cs
index 779e1152..08d54725 100644
--- a/FemDesign.Grasshopper/Properties/Resources.Designer.cs
+++ b/FemDesign.Grasshopper/Properties/Resources.Designer.cs
@@ -370,6 +370,16 @@ internal static System.Drawing.Bitmap Deconstruct_icon {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap DeltaBeamProfile {
+            get {
+                object obj = ResourceManager.GetObject("DeltaBeamProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -500,6 +510,16 @@ internal static System.Drawing.Bitmap EdgeConnectionRigid {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap EffectiveCompositeSlab {
+            get {
+                object obj = ResourceManager.GetObject("EffectiveCompositeSlab", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -730,6 +750,36 @@ internal static System.Drawing.Bitmap FictShellDeconstruct {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap FilledCruciformProfile {
+            get {
+                object obj = ResourceManager.GetObject("FilledCruciformProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap FilledIProfile {
+            get {
+                object obj = ResourceManager.GetObject("FilledIProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap FilledSteelTube {
+            get {
+                object obj = ResourceManager.GetObject("FilledSteelTube", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -870,6 +920,16 @@ internal static System.Drawing.Bitmap Help {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap HSQProfile {
+            get {
+                object obj = ResourceManager.GetObject("HSQProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -2080,6 +2140,16 @@ internal static System.Drawing.Bitmap ResultType {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap RHSProfile {
+            get {
+                object obj = ResourceManager.GetObject("RHSProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -2400,6 +2470,26 @@ internal static System.Drawing.Bitmap StagesDeconstruct {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap SteelTubeWithIProfile {
+            get {
+                object obj = ResourceManager.GetObject("SteelTubeWithIProfile", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap SteelTubeWithSteelCore {
+            get {
+                object obj = ResourceManager.GetObject("SteelTubeWithSteelCore", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
diff --git a/FemDesign.Grasshopper/Properties/Resources.resx b/FemDesign.Grasshopper/Properties/Resources.resx
index b3038895..945cd5b6 100644
--- a/FemDesign.Grasshopper/Properties/Resources.resx
+++ b/FemDesign.Grasshopper/Properties/Resources.resx
@@ -7389,4 +7389,31 @@
   <data name="PeriodicExcitationLoad" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\icons\PeriodicExcitationLoad.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="DeltaBeamProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\DeltaBeamProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="EffectiveCompositeSlab" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\EffectiveCompositeSlab.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="FilledCruciformProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\FilledCruciformProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="FilledIProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\FilledIProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="FilledSteelTube" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\FilledSteelTube.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="HSQProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\HSQProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="RHSProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\RHSProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="SteelTubeWithIProfile" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\SteelTubeWithIProfile.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="SteelTubeWithSteelCore" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\SteelTubeWithSteelCore.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Resources/icons/DeltaBeamProfile.png b/FemDesign.Grasshopper/Resources/icons/DeltaBeamProfile.png
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diff --git a/FemDesign.Grasshopper/Resources/icons/FilledCruciformProfile.png b/FemDesign.Grasshopper/Resources/icons/FilledCruciformProfile.png
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diff --git a/FemDesign.Grasshopper/Resources/icons/FilledIProfile.png b/FemDesign.Grasshopper/Resources/icons/FilledIProfile.png
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diff --git a/FemDesign.Grasshopper/Resources/icons/FilledSteelTube.png b/FemDesign.Grasshopper/Resources/icons/FilledSteelTube.png
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diff --git a/FemDesign.Grasshopper/Resources/icons/HSQProfile.png b/FemDesign.Grasshopper/Resources/icons/HSQProfile.png
new file mode 100644
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/FemDesign.Grasshopper/Resources/icons/RHSProfile.png b/FemDesign.Grasshopper/Resources/icons/RHSProfile.png
new file mode 100644
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GIT binary patch
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literal 0
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diff --git a/FemDesign.Grasshopper/Resources/icons/SteelTubeWithIProfile.png b/FemDesign.Grasshopper/Resources/icons/SteelTubeWithIProfile.png
new file mode 100644
index 0000000000000000000000000000000000000000..5fc1c2ed269ec58063043fb50e165a96995da593
GIT binary patch
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diff --git a/FemDesign.Grasshopper/Resources/icons/SteelTubeWithSteelCore.png b/FemDesign.Grasshopper/Resources/icons/SteelTubeWithSteelCore.png
new file mode 100644
index 0000000000000000000000000000000000000000..3cde4e2c1448b1f96e5eeea298b728b8774904ce
GIT binary patch
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literal 0
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diff --git a/FemDesign.Grasshopper/Sections/Composite/CompositeSectionDefine.cs b/FemDesign.Grasshopper/Sections/Composite/CompositeSectionDefine.cs
index 9a4efcf6..783a7143 100644
--- a/FemDesign.Grasshopper/Sections/Composite/CompositeSectionDefine.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/CompositeSectionDefine.cs
@@ -14,21 +14,21 @@
 using FemDesign.Grasshopper.Extension.ComponentExtension;
 using FemDesign.Loads;
 using Grasshopper.Kernel.Special;
+using Eto.Drawing;
 
 namespace FemDesign.Grasshopper
 {
     public class CompositeSectionDefine : GH_SwitcherComponent
     {
         private List<SubComponent> _subcomponents = new List<SubComponent>();
-        public override string UnitMenuName => "CompositeSection.Define";
-        protected override string DefaultEvaluationUnit => _subcomponents[2].name();
+        public override string UnitMenuName => "Section";
+        protected override string DefaultEvaluationUnit => _subcomponents[1].name();
         public override Guid ComponentGuid => new Guid("{A6B804EA-F254-4ABE-BEC5-FA69E92069AA}");
         public override GH_Exposure Exposure => GH_Exposure.tertiary;
-
-        protected override Bitmap Icon => null;
+        protected override System.Drawing.Bitmap Icon => Properties.Resources.HSQProfile;
 
         public CompositeSectionDefine()
-            : base("CompositeSection.Define", "Define",
+            : base("Composite.Define", "Define",
               "Define a new composite section.",
               CategoryName.Name(), SubCategoryName.Cat4b())
         {
@@ -77,6 +77,7 @@ protected override void SolveInstance(IGH_DataAccess DA, EvaluationUnit unit)
             {
                 return;
             }
+            
             foreach (SubComponent item in _subcomponents)
             {
                 if (unit.Name.Equals(item.name()))
diff --git a/FemDesign.Grasshopper/Sections/Composite/DeltaBeamProfile.cs b/FemDesign.Grasshopper/Sections/Composite/DeltaBeamProfile.cs
index 5d6f7cfb..03ba1b37 100644
--- a/FemDesign.Grasshopper/Sections/Composite/DeltaBeamProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/DeltaBeamProfile.cs
@@ -1,33 +1,31 @@
 using System;
+using System.Collections.Generic;
 using Grasshopper.Kernel;
 using Grasshopper.Kernel.Parameters;
 using Grasshopper.Kernel.Types;
 using FemDesign.Grasshopper.Components.UIWidgets;
-
+using System.Linq;
 
 namespace FemDesign.Grasshopper
 {
     public class DeltaBeamProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.DeltaBeamProfile;
         public override string name() => "DeltaBeamProfile";
         public override string display_name() => "DeltaBeamProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for Deltabeam sections. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for Deltabeam sections. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "DeltaBeamProfile", "DeltaBeamProfile", "Steel DeltaBeam profile. Can be 'D' or 'DR' section family types.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
         }
 
         public override void SolveInstance(IGH_DataAccess DA, out string msg, out GH_RuntimeMessageLevel level)
diff --git a/FemDesign.Grasshopper/Sections/Composite/EffectiveCompositeSlab.cs b/FemDesign.Grasshopper/Sections/Composite/EffectiveCompositeSlab.cs
index d2fbeb51..717d5553 100644
--- a/FemDesign.Grasshopper/Sections/Composite/EffectiveCompositeSlab.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/EffectiveCompositeSlab.cs
@@ -9,39 +9,36 @@ namespace FemDesign.Grasshopper
 {
     public class EffectiveCompositeSlab : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.EffectiveCompositeSlab;
         public override string name() => "EffectiveCompositeSlab";
         public override string display_name() => "EffectiveCompositeSlab";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for bars based on the effective width of a composite slab. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for bars based on the effective width of a composite slab. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "SteelProfile", "SteelProfile", "Steel profile.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
-            evaluationUnit.RegisterInputParam(new Param_Number(), "t", "t", "Slab thickness.", GH_ParamAccess.item, new GH_Number(150));
+            evaluationUnit.RegisterInputParam(new Param_Number(), "t", "t", "Slab thickness [mm].", GH_ParamAccess.item, new GH_Number(150));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
-            evaluationUnit.RegisterInputParam(new Param_Number(), "bEff", "bEff", "Concrete slab effective width.", GH_ParamAccess.item, new GH_Number(800));
+            evaluationUnit.RegisterInputParam(new Param_Number(), "bEff", "bEff", "Concrete slab effective width [mm].", GH_ParamAccess.item, new GH_Number(800));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
-            evaluationUnit.RegisterInputParam(new Param_Number(), "th", "th", "Hunch thickness.", GH_ParamAccess.item, new GH_Number(60));
+            evaluationUnit.RegisterInputParam(new Param_Number(), "th", "th", "Hunch thickness [mm].", GH_ParamAccess.item, new GH_Number(60));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
-            evaluationUnit.RegisterInputParam(new Param_Number(), "bt", "bt", "Hunch width at the top.", GH_ParamAccess.item, new GH_Number(400));
+            evaluationUnit.RegisterInputParam(new Param_Number(), "bt", "bt", "Hunch width at the top [mm].", GH_ParamAccess.item, new GH_Number(400));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
-            evaluationUnit.RegisterInputParam(new Param_Number(), "bb", "bb", "Hunch width at the bottom.", GH_ParamAccess.item, new GH_Number(200));
+            evaluationUnit.RegisterInputParam(new Param_Number(), "bb", "bb", "Hunch width at the bottom [mm].", GH_ParamAccess.item, new GH_Number(200));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Boolean(), "Filled", "Filled", "True if the steel section part is filled with concrete, false if not. The quality of the filling material is the same as the concrete of the slab.", GH_ParamAccess.item, new GH_Boolean(false));
diff --git a/FemDesign.Grasshopper/Sections/Composite/FilledCruciformProfile.cs b/FemDesign.Grasshopper/Sections/Composite/FilledCruciformProfile.cs
index eae38881..3f2e9af5 100644
--- a/FemDesign.Grasshopper/Sections/Composite/FilledCruciformProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/FilledCruciformProfile.cs
@@ -9,22 +9,20 @@ namespace FemDesign.Grasshopper
 {
     public class FilledCruciformProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.FilledCruciformProfile;
         public override string name() => "FilledCruciformProfile";
         public override string display_name() => "FilledCruciformProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for cruciform profiled cross-sections. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for cruciform profiled cross-sections. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "bc", "bc", "Cross-section width [mm].", GH_ParamAccess.item, new GH_Number(600));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
diff --git a/FemDesign.Grasshopper/Sections/Composite/FilledIProfile.cs b/FemDesign.Grasshopper/Sections/Composite/FilledIProfile.cs
index 704c230f..54ac86fd 100644
--- a/FemDesign.Grasshopper/Sections/Composite/FilledIProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/FilledIProfile.cs
@@ -10,25 +10,22 @@ namespace FemDesign.Grasshopper
 {
     public class FilledIProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.FilledIProfile;
         public override string name() => "FilledIProfile";
         public override string display_name() => "FilledIProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for an 'I' profiled steel section with filled with concrete. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for an 'I' profiled steel section with filled with concrete. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel profile material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "IProfile", "IProfile", "'I' profile steel section.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "cy", "cy", "Concrete cover in Y direction [mm].", GH_ParamAccess.item, new GH_Number(80));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
diff --git a/FemDesign.Grasshopper/Sections/Composite/FilledSteelTube.cs b/FemDesign.Grasshopper/Sections/Composite/FilledSteelTube.cs
index ee3d7488..d631487d 100644
--- a/FemDesign.Grasshopper/Sections/Composite/FilledSteelTube.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/FilledSteelTube.cs
@@ -9,22 +9,20 @@ namespace FemDesign.Grasshopper
 {
     public class FilledSteelTube : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.FilledSteelTube;
         public override string name() => "FilledSteelTube";
         public override string display_name() => "FilledSteelTube";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "d", "d", "Diameter of steel tube [mm].", GH_ParamAccess.item, new GH_Number(400));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
diff --git a/FemDesign.Grasshopper/Sections/Composite/HSQProfile.cs b/FemDesign.Grasshopper/Sections/Composite/HSQProfile.cs
index dab6eb34..bf6e3e8c 100644
--- a/FemDesign.Grasshopper/Sections/Composite/HSQProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/HSQProfile.cs
@@ -9,22 +9,20 @@ namespace FemDesign.Grasshopper
 {
     public class HSQProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.HSQProfile;
         public override string name() => "HSQProfile";
         public override string display_name() => "HSQProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for HSQ cross-sections. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for HSQ cross-sections. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "b", "b", "Intermediate width of the bottom flange [mm].", GH_ParamAccess.item, new GH_Number(200));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
diff --git a/FemDesign.Grasshopper/Sections/Composite/RHSProfile.cs b/FemDesign.Grasshopper/Sections/Composite/RHSProfile.cs
index 0774076d..b7601419 100644
--- a/FemDesign.Grasshopper/Sections/Composite/RHSProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/RHSProfile.cs
@@ -9,25 +9,22 @@ namespace FemDesign.Grasshopper
 {
     public class RHSProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.RHSProfile;
         public override string name() => "RHSProfile";
         public override string display_name() => "RHSProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for rectangular hollow sections. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a composite section for rectangular hollow sections. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Steel", "Steel", "Steel material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "RHSProfile", "RHSProfile", "Steel RHS profile.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
         }
 
         public override void SolveInstance(IGH_DataAccess DA, out string msg, out GH_RuntimeMessageLevel level)
diff --git a/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithIProfile.cs b/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithIProfile.cs
index 8cbed20b..66ccd078 100644
--- a/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithIProfile.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithIProfile.cs
@@ -13,28 +13,24 @@ namespace FemDesign.Grasshopper
 {
     public class SteelTubeWithIProfile : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.SteelTubeWithIProfile;
         public override string name() => "SteelTubeWithIProfile";
         public override string display_name() => "SteelTubeWithIProfile";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section with I-profile. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section with I-profile. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "TubeMaterial", "TubeMaterial", "Steel tube material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "IMateral", "IMateral", "I profile material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "IProfile", "IProfile", "Steel section from database. Must be an I-shaped section type.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "d", "d", "Diameter of steel tube [mm].", GH_ParamAccess.item, new GH_Number(600));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
diff --git a/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithSteelCore.cs b/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithSteelCore.cs
index 763649c3..97122969 100644
--- a/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithSteelCore.cs
+++ b/FemDesign.Grasshopper/Sections/Composite/SteelTubeWithSteelCore.cs
@@ -9,25 +9,22 @@ namespace FemDesign.Grasshopper
 {
     public class SteelTubeWithSteelCore : SubComponent
     {
+        public System.Drawing.Bitmap Icon => Properties.Resources.SteelTubeWithSteelCore;
         public override string name() => "SteelTubeWithSteelCore";
         public override string display_name() => "SteelTubeWithSteelCore";
 
         public override void registerEvaluationUnits(EvaluationUnitManager mngr)
         {
-            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section with a steel core. For more information, see FEM-Design GUI.");
+            EvaluationUnit evaluationUnit = new EvaluationUnit(name(), display_name(), "Create a filled steel tube composite section with a steel core. For more information, see FEM-Design GUI.", this.Icon);
             mngr.RegisterUnit(evaluationUnit);
             
             evaluationUnit.RegisterInputParam(new Param_String(), "SectionName", "SectionName", "Composite section name.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
             
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "TubeMaterial", "TubeMaterial", "Steel tube material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "CoreMaterial", "CoreMaterial", "Steel core material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_GenericObject(), "Concrete", "Concrete", "Concrete material.", GH_ParamAccess.item);
-            evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;
 
             evaluationUnit.RegisterInputParam(new Param_Number(), "d1", "d1", "Steel tube exterior diameter [mm].", GH_ParamAccess.item, new GH_Number(300));
             evaluationUnit.Inputs[evaluationUnit.Inputs.Count - 1].Parameter.Optional = true;