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diff --git a/src/gleem/ManipPartGroup.java b/src/gleem/ManipPartGroup.java
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+/*
+ * gleem -- OpenGL Extremely Easy-To-Use Manipulators.
+ * Copyright (C) 1998-2003 Kenneth B. Russell ([email protected])
+ *
+ * Copying, distribution and use of this software in source and binary
+ * forms, with or without modification, is permitted provided that the
+ * following conditions are met:
+ *
+ * Distributions of source code must reproduce the copyright notice,
+ * this list of conditions and the following disclaimer in the source
+ * code header files; and Distributions of binary code must reproduce
+ * the copyright notice, this list of conditions and the following
+ * disclaimer in the documentation, Read me file, license file and/or
+ * other materials provided with the software distribution.
+ *
+ * The names of Sun Microsystems, Inc. ("Sun") and/or the copyright
+ * holder may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS," WITHOUT A WARRANTY OF ANY
+ * KIND. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, NON-INTERFERENCE, ACCURACY OF
+ * INFORMATIONAL CONTENT OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. THE
+ * COPYRIGHT HOLDER, SUN AND SUN'S LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL THE
+ * COPYRIGHT HOLDER, SUN OR SUN'S LICENSORS BE LIABLE FOR ANY LOST
+ * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
+ * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
+ * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
+ * INABILITY TO USE THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGES. YOU ACKNOWLEDGE THAT THIS SOFTWARE IS NOT
+ * DESIGNED, LICENSED OR INTENDED FOR USE IN THE DESIGN, CONSTRUCTION,
+ * OPERATION OR MAINTENANCE OF ANY NUCLEAR FACILITY. THE COPYRIGHT
+ * HOLDER, SUN AND SUN'S LICENSORS DISCLAIM ANY EXPRESS OR IMPLIED
+ * WARRANTY OF FITNESS FOR SUCH USES.
+ */
+
+package gleem;
+
+import java.util.*;
+
+import gleem.linalg.*;
+import net.java.games.jogl.*;
+
+/** This class groups a set of ManipParts. Makes a set of ManipParts
+    look like one. */
+
+public class ManipPartGroup extends ManipPart {
+  private boolean pickable = true;
+  private boolean visible = true;
+  private List children = new ArrayList();
+
+  public void addChild(ManipPart child) {
+    children.add(child);
+  }
+
+  public void removeChild(ManipPart child) {
+    children.remove(child);
+  }
+
+  public int getNumChildren() {
+    return children.size();
+  }
+
+  public ManipPart getChild(int index) {
+    return (ManipPart) children.get(index);
+  }
+
+  public void intersectRay(Vec3f rayStart,
+                           Vec3f rayDirection,
+                           List results,
+                           Manip caller) {
+    if (!pickable) {
+      return;
+    }
+
+    int topIdx = results.size();
+    for (int i = 0; i < getNumChildren(); i++) {
+      getChild(i).intersectRay(rayStart, rayDirection, results, caller);
+    }
+
+    // Fix up all HitPoints so we appear to be the manipulator part
+    // which caused the intersection
+    for (int i = topIdx; i < results.size(); i++) {
+      ((HitPoint) results.get(i)).manipPart = this;
+    }
+  }
+
+  public void setTransform(Mat4f xform) {
+    for (int i = 0; i < getNumChildren(); i++) {
+      getChild(i).setTransform(xform);
+    }
+  }
+
+  public void highlight() {
+    for (int i = 0; i < getNumChildren(); i++) {
+      getChild(i).highlight();
+    }
+  }
+
+  public void clearHighlight() {
+    for (int i = 0; i < getNumChildren(); i++) {
+      getChild(i).clearHighlight();
+    }
+  }
+
+  public void setPickable(boolean pickable) {
+    this.pickable = pickable;
+  }
+
+  public boolean getPickable() {
+    return pickable;
+  }
+
+  public void setVisible(boolean visible) {
+    this.visible = visible;
+    for (Iterator iter = children.iterator(); iter.hasNext(); ) {
+      ((ManipPart) iter.next()).setVisible(visible);
+    }
+  }
+
+  public boolean getVisible() {
+    return visible;
+  }
+
+  public void render(GL gl) {
+    for (Iterator iter = children.iterator(); iter.hasNext(); ) {
+      ((ManipPart) iter.next()).render(gl);
+    }
+  }
+}