Updates

README.md

@@ -9,3 +9,6 @@ Codingame Challenge using the excellent Codingame-Scala-Kit : https://github.com
   * Symlinks `build.sbt`, `src/main/scala/com` and `project` should be referring the appropriate paths in `codingame-scala-kit-forked`
   * Running `./enhanceCoK` should continuously build a file `target/CoK.scala` that you can sync with Codingame using a web-browser plugin.
 
+# TODO
+
+  * Monkey Patch / extend / update `com.truelaurel.math.geometry.Pos` with local changes (see backup)

src/main/scala/cok/math/geometry/Pos.scala

@@ -0,0 +1,20 @@
+package cok.math.geometry
+import com.truelaurel.math.geometry.{Direction, N, S, W, E}
+
+// TODO Add those changes to truelaurel code.
+
+case class Pos(x: Int, y:Int) {
+  def neighborsIn(direction: Direction): Iterator[Pos] = direction match {
+    case N ⇒ (y - 1).to(0).iterator.map(y2 ⇒ Pos(x, y2))
+    case S ⇒ (y + 1).to(500).iterator.map(y2 ⇒ Pos(x, y2))
+    case W ⇒ (x - 1).to(0).iterator.map(x2 ⇒ Pos(x2, y))
+    case E ⇒ (x + 1).to(500).iterator.map(x2 ⇒ Pos(x2, y))
+  }
+
+  def distanceManhattan(pos: Pos): Int =
+    Math.abs(x - pos.x) + Math.abs(y - pos.y)
+}
+
+object Direction {
+  val cardinals = Seq(N, W, S, E)
+}