From 258bdc11b09de24f0d5a945f561a2109fa043a1e Mon Sep 17 00:00:00 2001
From: TomyLobo <tomylobo@nurfuerspam.de>
Date: Mon, 5 Dec 2011 23:21:51 +0100
Subject: [PATCH] Fixed //stack -s only shifting by 1 block, regardless of the
 selection size.

---
 .../com/sk89q/worldedit/commands/RegionCommands.java     | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java b/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
index b49ad4a60..61915c97b 100644
--- a/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
+++ b/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
@@ -290,9 +290,12 @@ public class RegionCommands {
 
         if (args.hasFlag('s')) {
             try {
-                Region region = session.getSelection(player.getWorld());
-                region.expand(dir.multiply(count));
-                region.contract(dir.multiply(count));
+                final Region region = session.getSelection(player.getWorld());
+                final Vector size = region.getMaximumPoint().subtract(region.getMinimumPoint());
+
+                final Vector shiftVector = dir.multiply(count * Math.abs(size.dot(size)));
+                region.expand(shiftVector);
+                region.contract(shiftVector);
 
                 session.getRegionSelector().learnChanges();
                 session.getRegionSelector().explainRegionAdjust(player, session);