Added basic undo/redo functionality with a history size of 15.

src/com/sk89q/worldedit/Point.java

@@ -0,0 +1,75 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit;
+
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+
+/**
+ *
+ * @author Albert
+ */
+public final class Point {
+    private final double x, y, z;
+
+    public Point(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    /**
+     * @return the x
+     */
+    public double getX() {
+        return x;
+    }
+
+
+    /**
+     * @return the y
+     */
+    public double getY() {
+        return y;
+    }
+
+    /**
+     * @return the z
+     */
+    public double getZ() {
+        return z;
+    }
+
+    public boolean equals(Object obj) {
+        if (!(obj instanceof Point)) {
+            return false;
+        }
+        Point other = (Point)obj;
+        return other.x == x && other.y == y && other.z == z;
+    }
+
+    public int hashCode() {
+        return new HashCodeBuilder(451, 41).
+            append(x).
+            append(y).
+            append(z).
+            toHashCode();
+    }
+
+}