Adding a hole primitive

MatterControlLib/DesignTools/Primitives/CubeObject3D.cs

@@ -159,4 +159,22 @@ namespace MatterHackers.MatterControl.DesignTools
 			change.SetRowVisible(nameof(Radius), () => Round);
 		}
 	}
+
+    public class CubeHoleObject3D : CubeObject3D
+    {
+        public override string ThumbnailName => "CubeHole";
+
+        public CubeHoleObject3D()
+        {
+			OutputType = PrintOutputTypes.Hole;
+        }
+
+		public static async Task<CubeHoleObject3D> Create()
+		{
+			var item = new CubeHoleObject3D();
+			await item.Rebuild();
+			return item;
+		}
+
+	}
 }

MatterControlLib/Library/Providers/MatterControl/PrimitivesContainer.cs

@@ -63,6 +63,10 @@ namespace MatterHackers.MatterControl.Library
 					"Cube".Localize(),
 					async () => await CubeObject3D.Create())
 					{ DateCreated = new DateTime(index++) },
+				new GeneratorItem(
+					"Hole".Localize(),
+					async () => await CubeHoleObject3D.Create())
+					{ DateCreated = new DateTime(index++) },
 				new GeneratorItem(
 					"Pyramid".Localize(),
 					async () => await PyramidObject3D.Create())

Submodules/agg-sharp

@@ -1 +1 @@
-Subproject commit 6750bc4daa8c0188b61ebf61bbdeb3ae57b8a998
+Subproject commit ef5fad208c4bf4361ef0de61de013c8b79b2d977