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diff --git a/src/org/jogamp/vecmath/Vector4d.java b/src/org/jogamp/vecmath/Vector4d.java
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+/*
+ * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package org.jogamp.vecmath;
+
+
+/**
+ * A 4-element vector represented by double-precision floating point
+ * x,y,z,w coordinates.
+ *
+ */
+public class Vector4d extends Tuple4d implements java.io.Serializable {
+
+    // Compatible with 1.1
+    static final long serialVersionUID = 3938123424117448700L;
+
+    /**
+     * Constructs and initializes a Vector4d from the specified xyzw coordinates.
+     * @param x the x coordinate
+     * @param y the y coordinate
+     * @param z the z coordinate
+     * @param w the w coordinate
+     */
+    public Vector4d(double x, double y, double z, double w)
+    {
+        super(x,y,z,w);
+    }
+
+    /**
+     * Constructs and initializes a Vector4d from the coordinates contained
+     * in the array.
+     * @param v the array of length 4 containing xyzw in order
+     */
+    public Vector4d(double[] v)
+    {
+        super(v);
+    }
+
+    /**
+     * Constructs and initializes a Vector4d from the specified Vector4d.
+     * @param v1 the Vector4d containing the initialization x y z w data
+     */
+    public Vector4d(Vector4d v1)
+    {
+         super(v1);
+    }
+
+    /**
+     * Constructs and initializes a Vector4d from the specified Vector4f.
+     * @param v1 the Vector4f containing the initialization x y z w data
+     */
+    public Vector4d(Vector4f v1)
+    {
+       super(v1);
+    }
+
+    /**
+     * Constructs and initializes a Vector4d from the specified Tuple4f.
+     * @param t1 the Tuple4f containing the initialization x y z w data
+     */
+    public Vector4d(Tuple4f t1)
+    {
+       super(t1);
+    }
+
+    /**
+     * Constructs and initializes a Vector4d from the specified Tuple4d.
+     * @param t1 the Tuple4d containing the initialization x y z w data
+     */
+    public Vector4d(Tuple4d t1)
+    {
+       super(t1);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector4d from the specified Tuple3d.
+     * The x,y,z components of this vector are set to the corresponding
+     * components of tuple t1.  The w component of this vector
+     * is set to 0.
+     * @param t1 the tuple to be copied
+     *
+     * @since vecmath 1.2
+     */
+    public Vector4d(Tuple3d t1) {
+	super(t1.x, t1.y, t1.z, 0.0);
+    }
+
+
+    /**
+     * Constructs and initializes a Vector4d to (0,0,0,0).
+     */
+    public Vector4d()
+    {
+       super();
+    }
+
+
+    /**
+     * Sets the x,y,z components of this vector to the corresponding
+     * components of tuple t1.  The w component of this vector
+     * is set to 0.
+     * @param t1 the tuple to be copied
+     *
+     * @since vecmath 1.2
+     */
+    public final void set(Tuple3d t1) {
+	this.x = t1.x;
+	this.y = t1.y;
+	this.z = t1.z;
+	this.w = 0.0;
+    }
+
+
+    /**
+     * Returns the length of this vector.
+     * @return the length of this vector
+     */
+    public final double length()
+    {
+        return Math.sqrt(this.x*this.x + this.y*this.y +
+                              this.z*this.z + this.w*this.w);
+    }
+
+
+    /**
+     * Returns the squared length of this vector.
+     * @return the squared length of this vector
+     */
+    public final double lengthSquared()
+    {
+        return (this.x*this.x + this.y*this.y +
+                this.z*this.z + this.w*this.w);
+    }
+
+
+  /**
+   * Returns the dot product of this vector and vector v1.
+   * @param v1 the other vector
+   * @return the dot product of this vector and vector v1
+   */
+    public final double dot(Vector4d v1)
+    {
+      return (this.x*v1.x + this.y*v1.y + this.z*v1.z + this.w*v1.w);
+    }
+
+
+   /**
+     * Sets the value of this vector to the normalization of vector v1.
+     * @param v1 the un-normalized vector
+     */
+    public final void normalize(Vector4d v1)
+    {
+        double norm;
+
+        norm = 1.0/Math.sqrt(v1.x*v1.x + v1.y*v1.y + v1.z*v1.z + v1.w*v1.w);
+        this.x = v1.x*norm;
+        this.y = v1.y*norm;
+        this.z = v1.z*norm;
+        this.w = v1.w*norm;
+    }
+
+
+    /**
+     * Normalizes this vector in place.
+     */
+    public final void normalize()
+    {
+        double norm;
+
+        norm = 1.0/Math.sqrt(this.x*this.x + this.y*this.y +
+                              this.z*this.z + this.w*this.w);
+        this.x *= norm;
+        this.y *= norm;
+        this.z *= norm;
+        this.w *= norm;
+    }
+
+
+  /**
+    *   Returns the (4-space) angle in radians between this vector and
+    *   the vector parameter; the return value is constrained to the
+    *   range [0,PI].
+    *   @param v1    the other vector
+    *   @return   the angle in radians in the range [0,PI]
+    */
+   public final double angle(Vector4d v1)
+   {
+      double vDot = this.dot(v1) / ( this.length()*v1.length() );
+      if( vDot < -1.0) vDot = -1.0;
+      if( vDot >  1.0) vDot =  1.0;
+      return((double) (Math.acos( vDot )));
+   }
+
+}