bofa doesn't crawl back anymore, yielding a saner movement pattern

bofa/Makefile

@@ -0,0 +1,3 @@
+bot.zip: src/main/scala/bot/*.scala
+	cd src/main/scala/bot && sed -i 's/Boolean = true/Boolean = false/' DebugUtil.scala
+	cd src/main/scala && zip -r bot bot && mv bot.zip $(CURDIR)

bofa/src/main/scala/bot/Cortex.scala

@@ -15,11 +15,22 @@ final case object Right extends { val label = "right"; val deltaX = 1; val delta
 final case object Up extends { val label = "up"; val deltaX = 0; val deltaY = -1 } with Direction
 final case object Down extends { val label = "down"; val deltaX = 0; val deltaY = 1 } with Direction
 
+object Scribble {
+  var lastFieldWeight = 0
+  var lastBofaField: Field = Field.empty
+}
+
 class Cortex {
   def move(state: State, time: Int): Direction = {
     val directions: Seq[Direction] = possibleDirections(state.bofaField, state)
+    
     val weightBoard = weightCodes(1000, decr, state)  
+    preventFallBack(weightBoard, state)
+    
     val dir = getMaxDir(state.bofaField, directions, weightBoard, state)
+      
+    Scribble.lastBofaField = state.bofaField
+    
     weightBoard(state.bofaField.x)(state.bofaField.y) = -999
     printBoard(weightBoard)
  
@@ -27,13 +38,19 @@ class Cortex {
   }
   
   def decr(dist: Int, start: Int) = {
-    (start/math.pow(2, (dist+1))).intValue()
+    val d = (start/math.pow(2.5, (dist+1))).intValue()
+    if (d < 5) 5 else d
   }
   
   def getMaxField(weightBoard: Array[Array[Int]], state: State): Field = {
     var maxField = (0,0)
     for (x <- 0 until S.width; y <- 0 until S.height) {
+      // generally, the highest is best
       if (weightBoard(x)(y) > weightBoard(maxField _1)(maxField _2)) maxField = (x,y) 
+      // if equal prefer to go down, right b/c up/left is evil first but
+      if (weightBoard(x)(y) == weightBoard(maxField _1)(maxField _2)){
+        if (x > (maxField _1) || y > (maxField _2)) maxField = (x, y)
+      }
     }
     
     state.board(maxField _1)(maxField _2)
@@ -54,11 +71,14 @@ class Cortex {
       var (maxX, maxY) = (mod (field.x+maxDir.deltaX) (S.width), mod (field.y+maxDir.deltaY) (S.width))
       
       if (weightBoard(x)(y) > weightBoard(maxX)(maxY)) maxDir = d
+
     }
     
     maxDir
   }
 
+  def manhattan(x: Int, y: Int)(a: Int, b: Int): Int = math.abs(x-a) + math.abs(y-b)
+  
   def possibleDirections(field: Field, state: State): Seq[Direction] = {
     val pd = new mutable.ListBuffer[Direction]
     val board = state.board
@@ -79,6 +99,22 @@ class Cortex {
     pd
   }
   
+  def preventFallBack(weightBoard: Array[Array[Int]], state: State): Unit = {
+    val lastBofaField = Scribble.lastBofaField
+    
+    if (lastBofaField != Field.empty){
+      // if something changed allow fallback
+      log(s"lastFieldWeight=${Scribble.lastFieldWeight}")
+      if (Scribble.lastFieldWeight == weightBoard(lastBofaField.x)(lastBofaField.y)){
+        Scribble.lastFieldWeight = weightBoard(state.bofaField.x)(state.bofaField.y)
+        val x: Int = weightBoard(lastBofaField.x)(lastBofaField.y)
+        weightBoard(lastBofaField.x)(lastBofaField.y) = (x - (0.1 * x)).intValue()
+      } else{
+          Scribble.lastFieldWeight = weightBoard(state.bofaField.x)(state.bofaField.y)
+      }
+    }
+  }
+  
   def weightCodes(start: Int, drop: (Int, Int) => Int, state: State): Array[Array[Int]] = {
     val board = state.board
     val codes = state.codes

bofa/src/main/scala/bot/DebugUtil.scala

@@ -2,9 +2,9 @@ package bot
 
 object DebugUtil {
   var state: Option[State] = None // we need this to get access to the current game round
-  val Dbg: Boolean = true
+  val Dbg: Boolean = false
-  val Log: Boolean = true
+  val Log: Boolean = false
-  val Time: Boolean = true
+  val Time: Boolean = false
   
   def dbg(msg: String) = if(Dbg) Console.err.println(s"$round $msg")
   def log(msg: String) = if(Log) Console.err.println(s"$round $msg")