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diff --git a/src/net/java/joglutils/msg/elements/GLModelMatrixElement.java b/src/net/java/joglutils/msg/elements/GLModelMatrixElement.java
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+++ b/src/net/java/joglutils/msg/elements/GLModelMatrixElement.java
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+/*
+ * Copyright (c) 2007 Sun Microsystems, 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:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution 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 Sun Microsystems, Inc. or the names of
+ * contributors may 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 OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS 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 SUN OR
+ * ITS 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
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ */
+
+package net.java.joglutils.msg.elements;
+
+import java.nio.*;
+import javax.media.opengl.*;
+import javax.media.opengl.glu.*;
+
+import net.java.joglutils.msg.math.*;
+import net.java.joglutils.msg.misc.*;
+
+/** Represents the model matrix, which is the transformation applied
+    to objects in the scene, and causes side-effects in OpenGL. */
+
+public class GLModelMatrixElement extends ModelMatrixElement {
+  // Boilerplate for concrete element subclasses
+  public Element newInstance() {
+    return new GLModelMatrixElement();
+  }
+  public static GLModelMatrixElement getInstance(State state) {
+    return (GLModelMatrixElement) ModelMatrixElement.getInstance(state);
+  }
+  public static void enable(State defaultState) {
+    Element tmp = new GLModelMatrixElement();
+    defaultState.setElement(tmp.getStateIndex(), tmp);
+  }
+
+  // State which we need in order to reset the modelview matrix
+  private State state;
+
+  public void push(State state) {
+    super.push(state);
+    this.state = state;
+
+    // Cause side-effects in OpenGL
+    GL gl = GLU.getCurrentGL();
+    gl.glPushMatrix();
+  }
+
+  public void pop(State state, Element previousTopElement) {
+    super.pop(state, previousTopElement);
+
+    // Cause side-effects in OpenGL
+    GL gl = GLU.getCurrentGL();
+    gl.glPopMatrix();
+  }
+
+  public void makeEltIdent() {
+    super.makeEltIdent();
+    // Cause side-effects in OpenGL
+    // Recompute the complete modelview matrix
+    Mat4f mat = ViewingMatrixElement.getInstance(state).getMatrix();
+    GL gl = GLU.getCurrentGL();
+    gl.glLoadTransposeMatrixf(mat.getRowMajorData(), 0);
+  }
+
+  public void multElt(Mat4f matrix) {
+    super.multElt(matrix);
+    GL gl = GLU.getCurrentGL();
+    gl.glMultTransposeMatrixf(matrix.getRowMajorData(), 0);
+  }
+}