Add /center commmand

src/main/java/com/sk89q/worldedit/regions/AbstractRegion.java

@@ -35,6 +35,11 @@ public abstract class AbstractRegion implements Region {
         this.world = world;
     }
 
+    @Override
+    public Vector getCenter() {
+        return getMinimumPoint().add(getMaximumPoint()).divide(2);
+    }
+
     /**
      * Get the iterator.
      *

src/main/java/com/sk89q/worldedit/regions/CylinderRegion.java

@@ -87,6 +87,7 @@ public class CylinderRegion extends AbstractRegion implements FlatRegion {
      *
      * @return
      */
+    @Override
     public Vector getCenter() {
         return center.toVector((maxY + minY) / 2);
     }

src/main/java/com/sk89q/worldedit/regions/EllipsoidRegion.java

@@ -175,6 +175,7 @@ public class EllipsoidRegion extends AbstractRegion {
      *
      * @return center
      */
+    @Override
     public Vector getCenter() {
         return center;
     }

src/main/java/com/sk89q/worldedit/regions/Region.java

@@ -44,6 +44,15 @@ public interface Region extends Iterable<BlockVector>, Cloneable {
      */
     public Vector getMaximumPoint();
 
+    /**
+     * Get the center point of a region.
+     * Note: Coordinates will not be integers
+     * if the corresponding lengths are even.
+     *
+     * @return center point
+     */
+    public Vector getCenter();
+
     /**
      * Get the number of blocks in the region.
      *