From 2a7bbaeb974be36b4ca714f2c2c604fda2306d8c Mon Sep 17 00:00:00 2001
From: bdew <blackdew@gmail.com>
Date: Wed, 3 Sep 2014 17:37:00 +0300
Subject: [PATCH] prevent outputs connecting back to the same structure

---
 src/net/bdew/lib/multiblock/tile/TileOutput.scala | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/net/bdew/lib/multiblock/tile/TileOutput.scala b/src/net/bdew/lib/multiblock/tile/TileOutput.scala
index 26482b5..e1d2b69 100644
--- a/src/net/bdew/lib/multiblock/tile/TileOutput.scala
+++ b/src/net/bdew/lib/multiblock/tile/TileOutput.scala
@@ -38,7 +38,11 @@ abstract class TileOutput extends TileModule with MIOutput {
 
   def doRescanFaces() {
     getCore map { core =>
-      val connections = ForgeDirection.VALID_DIRECTIONS.filter(canConnectoToFace).toSet
+      val connections = (
+        ForgeDirection.VALID_DIRECTIONS
+          filterNot { dir => core.modules.contains(mypos.neighbour(dir)) }
+          filter canConnectoToFace
+        ).toSet
       val known = core.outputFaces.filter(_._1.origin == mypos).map(_._1.face).toSet
       val toAdd = connections -- known
       val toRemove = known -- connections