From 4532e7b20d41a4e6c17ef9a0dfaa1f172c21b90f Mon Sep 17 00:00:00 2001
From: Michael L Smith <michael.lee.smith@live.com>
Date: Tue, 23 Feb 2016 19:14:50 -0800
Subject: [PATCH] Added Variables class, Settings class, settings/header output
 in OSCADObject.ToFile

---
 OSCADSharp/OSCADSharp.ConsoleTests/Program.cs |  1 +
 OSCADSharp/OSCADSharp/OSCADObject.cs          |  7 +-
 OSCADSharp/OSCADSharp/OSCADSharp.csproj       |  2 +
 OSCADSharp/OSCADSharp/Scripting/Variables.cs  | 67 +++++++++++++++++++
 OSCADSharp/OSCADSharp/Settings.cs             | 27 ++++++++
 5 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 OSCADSharp/OSCADSharp/Scripting/Variables.cs
 create mode 100644 OSCADSharp/OSCADSharp/Settings.cs

diff --git a/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs b/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
index b6a77fa..c1b74b7 100644
--- a/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
+++ b/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
@@ -14,6 +14,7 @@ namespace OSCADSharp.ConsoleTests
         static void Main(string[] args)
         {
 
+            Settings.Globals["$fn"] = 100;
             var obj = new Sphere(30);
 
             var pos = obj.Position();
diff --git a/OSCADSharp/OSCADSharp/OSCADObject.cs b/OSCADSharp/OSCADSharp/OSCADObject.cs
index 5201a46..67d2ab6 100644
--- a/OSCADSharp/OSCADSharp/OSCADObject.cs
+++ b/OSCADSharp/OSCADSharp/OSCADObject.cs
@@ -329,7 +329,12 @@ namespace OSCADSharp
                 path += ".scad";
             }
 
-            File.WriteAllLines(path, new string[] { this.ToString() });
+            File.WriteAllLines(path, new string[] 
+            {
+                Settings.OSCADSharpHeader,
+                Settings.Globals.ToString(),
+                this.ToString()
+            });
         }
         #endregion
 
diff --git a/OSCADSharp/OSCADSharp/OSCADSharp.csproj b/OSCADSharp/OSCADSharp/OSCADSharp.csproj
index 6a7f166..ae770d1 100644
--- a/OSCADSharp/OSCADSharp/OSCADSharp.csproj
+++ b/OSCADSharp/OSCADSharp/OSCADSharp.csproj
@@ -44,6 +44,7 @@
   <ItemGroup>
     <Compile Include="Ids.cs" />
     <Compile Include="Scripting\StatementBuilder.cs" />
+    <Compile Include="Settings.cs" />
     <Compile Include="Sizes.cs" />
     <Compile Include="Spatial\Bounds.cs" />
     <Compile Include="Spatial\Matrix.cs" />
@@ -68,6 +69,7 @@
     <Compile Include="Transforms\ScaledObject.cs" />
     <Compile Include="Transforms\TranslatedObject.cs" />
     <Compile Include="Spatial\Vector3.cs" />
+    <Compile Include="Scripting\Variables.cs" />
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
diff --git a/OSCADSharp/OSCADSharp/Scripting/Variables.cs b/OSCADSharp/OSCADSharp/Scripting/Variables.cs
new file mode 100644
index 0000000..1a47561
--- /dev/null
+++ b/OSCADSharp/OSCADSharp/Scripting/Variables.cs
@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OSCADSharp.Scripting
+{
+    /// <summary>
+    /// A collection of names/values for variables
+    /// </summary>
+    public sealed class Variables
+    {
+        private Dictionary<string, object> variables = new Dictionary<string, object>();
+
+        /// <summary>
+        /// Assigns or gets a variable's value
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public object this[string name]   // long is a 64-bit integer
+        {
+            get
+            {
+                if (variables.ContainsKey(name))
+                {
+                    return variables[name];
+                }
+                else
+                {
+                    return null;
+                }
+            }
+            set
+            {
+                variables[name] = value;
+            }
+        }
+
+        /// <summary>
+        /// This class is intended for use in other externally-exposed classes,
+        /// as such its constructor is not public.
+        /// </summary>
+        internal Variables()
+        {
+        }
+
+        /// <summary>
+        /// Gets the string representation for all variables
+        /// </summary>
+        /// <returns></returns>
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder();
+            foreach (var kvp in this.variables)
+            {
+                sb.Append(kvp.Key);
+                sb.Append(" = ");
+                sb.Append(kvp.Value);
+                sb.Append(";");
+                sb.Append(Environment.NewLine);
+            }
+
+            return sb.ToString();
+        }
+    }
+}
diff --git a/OSCADSharp/OSCADSharp/Settings.cs b/OSCADSharp/OSCADSharp/Settings.cs
new file mode 100644
index 0000000..3886f99
--- /dev/null
+++ b/OSCADSharp/OSCADSharp/Settings.cs
@@ -0,0 +1,27 @@
+using OSCADSharp.Scripting;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OSCADSharp
+{
+    /// <summary>
+    /// Settings for OpenSCAD scripts
+    /// </summary>
+    public static class Settings
+    {
+        /// <summary>
+        /// Code-gen header
+        /// </summary>
+        public static readonly string OSCADSharpHeader = String.Format("/*Code Generated using OSCADSharp on {0}. {1}{2}For more information, please visit https://github.com/Exolun/OSCADSharp */{3}", 
+            DateTime.Now.ToString(), Environment.NewLine, Environment.NewLine, Environment.NewLine);
+
+        /// <summary>
+        /// Global variables that can be assigned for output at the 
+        /// top of OpenSCAD scripts
+        /// </summary>
+        public static Variables Globals = new Variables();
+    }
+}