Optimize ArrowStopper

FightSystem_Main/src/de/steamwar/fightsystem/listener/ArrowStopper.java

@@ -61,18 +61,23 @@ public class ArrowStopper {
 
     private boolean checkBlocks(Block start, Block end) {
         Block cursor = start;
+        BlockFace from = BlockFace.SELF;
 
         while (!cursor.getLocation().equals(end.getLocation())) {
             BlockFace nearest = BlockFace.SELF;
-            double nearestDistance = cursor.getLocation().distance(end.getLocation());
+            double nearestDistance = getSquareDistance(cursor.getLocation(), end.getLocation());
             for (BlockFace face : BLOCK_FACES) {
+                if(face == from) {
+                    continue;
+                }
                 Block relative = cursor.getRelative(face);
-                double distance = relative.getLocation().distance(end.getLocation());
+                double distance = getSquareDistance(relative.getLocation(), end.getLocation());
                 if(distance < nearestDistance) {
                     nearestDistance = distance;
                     nearest = face;
                 }
             }
+            from = nearest;
             cursor = cursor.getRelative(nearest);
             if(checkBlock(cursor))
                 return true;
@@ -81,6 +86,10 @@ public class ArrowStopper {
         return false;
     }
 
+    private double getSquareDistance(Location loc1, Location loc2) {
+        return loc1.getX() * loc2.getX() + loc1.getY() * loc2.getY() + loc1.getZ() * loc2.getZ();
+    }
+
     private boolean checkBlock(Block block) {
         return Config.HiddenBlocks.contains(block.getType().name().toLowerCase());
     }