Fix for an issue where Rotating/Translating an object, then using Scale would yield the wrong Position() value.

OSCADSharp/OSCADSharp.ConsoleTests/Program.cs

@@ -13,7 +13,8 @@ namespace OSCADSharp.ConsoleTests
     {
         static void Main(string[] args)
         {
-            var obj = new Cube() + new Sphere() + new Sphere().Translate(2, 2, 2) - new Cylinder(2, 5) + new Text3D("Hey hey!");
+            var obj = new Cube(5, 5, 20)
+                .Translate(30, 0, 0).Rotate(0, 90, 0).Scale(2, 2, 2);
 
             var pos = obj.Position();
             var cyl1 = new Cylinder(1, 100, true).Translate(pos);

OSCADSharp/OSCADSharp.UnitTests/OSCADSharp.UnitTests.csproj

@@ -65,6 +65,7 @@
     <Compile Include="Booleans\DifferenceTests.cs" />
     <Compile Include="Booleans\IntersectionTests.cs" />
     <Compile Include="Transforms\MinkowskiTests.cs" />
+    <Compile Include="Transforms\ScaleTests.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OSCADSharp\OSCADSharp.csproj">

OSCADSharp/OSCADSharp.UnitTests/Transforms/ScaleTests.cs

@@ -0,0 +1,23 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using OSCADSharp.Solids;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OSCADSharp.UnitTests.Transforms
+{
+    [TestClass]
+    public class ScaleTests
+    {
+        [TestMethod]
+        public void Scale_TranslateRotateScaleStillYieldsCorrectPosition()
+        {
+            var obj = new Cube(5, 5, 20)
+                   .Translate(30, 0, 0).Rotate(0, 90, 0).Scale(2, 2, 2);
+            
+            Assert.AreEqual(new Vector3(20, 5, -65), obj.Position());
+        }
+    }
+}

OSCADSharp/OSCADSharp/Transforms/ScaledObject.cs

@@ -51,7 +51,7 @@ namespace OSCADSharp.Transforms
 
         public override Vector3 Position()
         {
-            return obj.Position();
+            return obj.Position() * this.ScaleFactor;
         }
     }
 }