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diff --git a/o3d/samples/home-configurators/pantool.js b/o3d/samples/home-configurators/pantool.js
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/**
+ * The Pan tool allows the user to pan around the view by clicking and dragging.
+ */
+function PanTool(camera) {
+  this.camera = camera;
+  this.dragging = false;
+  this.lastOffset = null;
+}
+
+PanTool.prototype.handleMouseDown = function(e) {
+  var offset = { x: e.x, y: e.y };
+  this.lastOffset = offset;
+  this.dragging = true;
+};
+
+PanTool.prototype.handleMouseMove = function(e) {
+  if (this.dragging && e.x !== undefined) {
+    var offset = { x: e.x, y: e.y };
+
+    dY = (offset.y - this.lastOffset.y);
+    dX = -(offset.x - this.lastOffset.x);
+    this.lastOffset = offset;
+
+    this.camera.target.x -= (dY * Math.cos(this.camera.eye.rotZ) +
+        dX * Math.sin(this.camera.eye.rotZ)) /
+        (700 / this.camera.eye.distanceFromTarget);
+    this.camera.target.y += (-dY * Math.sin(this.camera.eye.rotZ) +
+        dX * Math.cos(this.camera.eye.rotZ)) /
+        (700 / this.camera.eye.distanceFromTarget);
+
+    this.camera.update();
+  }
+};
+
+PanTool.prototype.handleMouseUp = function(e) {
+  this.dragging = false;
+};
+
+PanTool.prototype.handleKeyDown = function(e) {
+  return false;
+};
+
+PanTool.prototype.handleKeyUp = function(e) {
+  return false;
+};