Finish day 18

2 files changed, 34 insertions, 0 deletions

diff --git a/aoc-2022-dotnet/Common/Common.fsproj b/aoc-2022-dotnet/Common/Common.fsproj
index 32057cf..510a1ea 100644
--- a/aoc-2022-dotnet/Common/Common.fsproj
+++ b/aoc-2022-dotnet/Common/Common.fsproj
@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <Compile Include="Vec3.fs" />
     <Compile Include="Vec2.fs" />
     <Compile Include="Util.fs" />
   </ItemGroup>
diff --git a/aoc-2022-dotnet/Common/Vec3.fs b/aoc-2022-dotnet/Common/Vec3.fs
new file mode 100644
index 0000000..3a05315
--- /dev/null
+++ b/aoc-2022-dotnet/Common/Vec3.fs
@@ -0,0 +1,33 @@
+namespace Common
+
+type Vec3 =
+    | Vec3 of int * int * int
+
+    static member x(Vec3 (x, _, _)) = x
+    static member y(Vec3 (_, y, _)) = y
+    static member z(Vec3 (_, _, z)) = z
+
+    static member ones = Vec3(1, 1, 1)
+
+    static member directions6 =
+        [ Vec3(-1, 0, 0)
+          Vec3(1, 0, 0)
+          Vec3(0, -1, 0)
+          Vec3(0, 1, 0)
+          Vec3(0, 0, -1)
+          Vec3(0, 0, 1) ]
+
+    static member combine fn (Vec3 (x1, y1, z1)) (Vec3 (x2, y2, z2)) = Vec3(fn x1 x2, fn y1 y2, fn z1 z2)
+
+    static member inline (+)(v1, v2) = Vec3.combine (+) v1 v2
+    static member inline (-)(v1, v2) = Vec3.combine (-) v1 v2
+
+    static member neighbours6 v = List.map ((+) v) Vec3.directions6
+
+    static member boundedBy minBound maxBound (Vec3 (x, y, z)) =
+        x >= Vec3.x minBound
+        && x <= Vec3.x maxBound
+        && y >= Vec3.y minBound
+        && y <= Vec3.y maxBound
+        && z >= Vec3.z minBound
+        && z <= Vec3.z maxBound