clearing robot afterimages in a scheduled block update, which should be a bit more stable... should. minecraft. whatever; catching error in analyzer if node has no address; added setting to allow robots to ignore cobwebs, the most stupid invention ever (hardness of four without tools? seriously?), defaults to on; fixed threading issue with setBlockBoundsBasedOnState, hopefully resolving robot suicides

li/cil/oc/Settings.scala

@@ -48,6 +48,7 @@ class Settings(config: Config) {
   val allowActivateBlocks = config.getBoolean("robot.allowActivateBlocks")
   val allowUseItemsWithDuration = config.getBoolean("robot.allowUseItemsWithDuration")
   val canAttackPlayers = config.getBoolean("robot.canAttackPlayers")
+  val screwCobwebs = config.getBoolean("robot.notAfraidOfSpiders")
   val swingRange = config.getDouble("robot.swingRange")
   val useAndPlaceRange = config.getDouble("robot.useAndPlaceRange")
   val itemDamageRate = config.getDouble("robot.itemDamageRate") max 0 min 1

li/cil/oc/common/block/Delegator.scala

@@ -154,7 +154,13 @@ class Delegator[Child <: Delegate](id: Int) extends Block(id, Material.iron) {
 
   override def setBlockBoundsBasedOnState(world: IBlockAccess, x: Int, y: Int, z: Int) =
     subBlock(world, x, y, z) match {
-      case Some(subBlock) => subBlock.updateBounds(world, x, y, z)
+      // This function can mess things up badly in single player if not
+      // synchronized because it sets fields in an instance stored in the
+      // static block list... which is used by both server and client thread.
+      // The other place where this is locked is in collisionRayTrace below,
+      // which seems to be the only built-in function that *logically* depends
+      // on the state bounds (rest is rendering which is unimportant).
+      case Some(subBlock) => subBlock.synchronized(subBlock.updateBounds(world, x, y, z))
       case _ =>
     }
 
@@ -166,7 +172,8 @@ class Delegator[Child <: Delegate](id: Int) extends Block(id, Material.iron) {
 
   override def collisionRayTrace(world: World, x: Int, y: Int, z: Int, origin: Vec3, direction: Vec3) =
     subBlock(world, x, y, z) match {
-      case Some(subBlock) => subBlock.intersect(world, x, y, z, origin, direction)
+      // See setBlockBoundsBasedOnState for info on the lock.
+      case Some(subBlock) => subBlock.synchronized(subBlock.intersect(world, x, y, z, origin, direction))
       case _ => super.collisionRayTrace(world, x, y, z, origin, direction)
     }
 

li/cil/oc/common/block/RobotAfterimage.scala

@@ -50,6 +50,13 @@ class RobotAfterimage(val parent: SpecialDelegator) extends SpecialDelegate {
 
   // ----------------------------------------------------------------------- //
 
+  override def update(world: World, x: Int, y: Int, z: Int) {
+    parent.subBlock(world, x, y, z) match {
+      case Some(_: RobotAfterimage) => world.setBlockToAir(x, y, z)
+      case _ =>
+    }
+  }
+
   override def removedByEntity(world: World, x: Int, y: Int, z: Int, player: EntityPlayer) = {
     super.removedFromWorld(world, x, y, z, blockId)
     findMovingRobot(world, x, y, z) match {

li/cil/oc/common/item/Analyzer.scala

@@ -52,7 +52,9 @@ class Analyzer(val parent: Delegator) extends Delegate {
       case _ =>
     }
     val address = node.address()
-    stats.setString(Settings.namespace + "gui.Analyzer.Address", address)
+    if (address != null && !address.isEmpty) {
+      stats.setString(Settings.namespace + "gui.Analyzer.Address", address)
+    }
     PacketSender.sendAnalyze(stats, address, player.asInstanceOf[Player])
   }
 

li/cil/oc/common/tileentity/Robot.scala

@@ -138,8 +138,10 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
         Blocks.robotAfterimage.setBlock(world, ox, oy, oz, 1)
         assert(Delegator.subBlock(world, ox, oy, oz).exists(_ == Blocks.robotAfterimage))
         // Here instead of Lua callback so that it gets called on client, too.
-        animateMove(ox, oy, oz, Settings.get.moveDelay)
+        val moveTicks = (Settings.get.moveDelay * 20).toInt max 1
+        setAnimateMove(ox, oy, oz, moveTicks)
         if (isServer) {
+          world.scheduleBlockUpdate(ox, oy, oz, Blocks.robotAfterimage.parent.blockID, moveTicks - 1)
           ServerPacketSender.sendRobotMove(this, ox, oy, oz, direction)
           checkRedstoneInputChanged()
         }
@@ -190,9 +192,6 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
 
   def isAnimatingTurn = animationTicksLeft > 0 && turnAxis != 0
 
-  def animateMove(fromX: Int, fromY: Int, fromZ: Int, duration: Double) =
-    setAnimateMove(fromX, fromY, fromZ, (duration * 20).toInt)
-
   def animateSwing(duration: Double) = {
     setAnimateSwing((duration * 20).toInt)
     ServerPacketSender.sendRobotAnimateSwing(this)
@@ -248,12 +247,11 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
     if (animationTicksLeft > 0) {
       animationTicksLeft -= 1
       if (animationTicksLeft == 0) {
-        if (Blocks.blockSpecial.subBlock(world, moveFromX, moveFromY, moveFromZ).exists(_ == Blocks.robotAfterimage)) {
-          world.setBlock(moveFromX, moveFromY, moveFromZ, 0, 0, 1)
-        }
-        moveFromX = x
-        moveFromY = y
-        moveFromZ = z
+        moveFromX = Int.MaxValue
+        moveFromY = Int.MaxValue
+        moveFromZ = Int.MaxValue
+        swingingTool = false
+        turnAxis = 0
       }
     }
     super.updateEntity()

li/cil/oc/server/component/robot/Player.scala

@@ -222,7 +222,9 @@ class Player(val robot: Robot) extends EntityPlayer(robot.world, Settings.get.na
       return 0
     }
 
-    if (!ForgeHooks.canHarvestBlock(block, this, metadata)) {
+    val cobwebOverride = block == Block.web && Settings.get.screwCobwebs
+
+    if (!ForgeHooks.canHarvestBlock(block, this, metadata) && !cobwebOverride) {
       return 0
     }
 
@@ -235,7 +237,9 @@ class Player(val robot: Robot) extends EntityPlayer(robot.world, Settings.get.na
 
     val hardness = block.getBlockHardness(world, x, y, z)
     val strength = getCurrentPlayerStrVsBlock(block, false, metadata)
-    val breakTime = hardness * 1.5 / strength
+    val breakTime =
+      if (cobwebOverride) Settings.get.swingDelay
+      else hardness * 1.5 / strength
 
     if (stack != null) {
       val oldDamage = stack.getItemDamage

reference.conf

@@ -149,6 +149,16 @@ opencomputers {
       # in the game.
       canAttackPlayers: false
 
+      # Determines whether robots are a pretty cool guy. Ususally cobwebs are
+      # the bane of anything using a tool other than a sword or shears. This is
+      # an utter pain in the part you sit on, because it makes robots meant to
+      # dig holes utterly useless: the poor things couldn't break cobwebs in
+      # mining shafts with their golden pick axes. So, if this setting is true,
+      # we check for cobweb and allow robots to break 'em anyway, no matter
+      # their current tool. After all, the hardness value of cobweb can only
+      # rationally explained by Steve's fear of spiders, anyway.
+      notAfraidOfSpiders: true
+
       # The 'range' of robots when swinging an equipped tool (left click). This
       # is the distance to the center of block the robot swings the tool in to
       # the side the tool is swung towards. I.e. for the collision check, which