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diff --git a/src/libnoiseforjava/module/Exponent.java b/src/libnoiseforjava/module/Exponent.java
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+++ b/src/libnoiseforjava/module/Exponent.java
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+/*
+ * Copyright (C) 2003, 2004 Jason Bevins (original libnoise code)
+ * Copyright  2010 Thomas J. Hodge (java port of libnoise)
+ * 
+ * This file is part of libnoiseforjava.
+ * 
+ * libnoiseforjava is a Java port of the C++ library libnoise, which may be found at 
+ * http://libnoise.sourceforge.net/.  libnoise was developed by Jason Bevins, who may be 
+ * contacted at [email protected] (for great email, take off every 'zig').
+ * Porting to Java was done by Thomas Hodge, who may be contacted at
+ * [email protected] (remove every 'zag').
+ * 
+ * libnoiseforjava 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.
+ * 
+ * libnoiseforjava 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
+ * libnoiseforjava.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+package libnoiseforjava.module;
+
+import libnoiseforjava.exception.ExceptionInvalidParam;
+
+public class Exponent extends ModuleBase
+{
+   /// Noise module that maps the output value from a source module onto an
+   /// exponential curve.
+   ///
+   /// Because most noise modules will output values that range from -1.0 to
+   /// +1.0, this noise module first normalizes this output value (the range
+   /// becomes 0.0 to 1.0), maps that value onto an exponential curve, then
+   /// rescales that value back to the original range.
+   ///
+   /// This noise module requires one source module.
+
+   /// Default exponent for the Exponent noise module.
+   static final double DEFAULT_EXPONENT = 1.0;
+
+
+   /// Exponent to apply to the output value from the source module.
+   double exponent;
+
+   public Exponent (ModuleBase sourceModule) throws ExceptionInvalidParam
+   {
+      super(1);
+      setSourceModule(0, sourceModule);
+      exponent = DEFAULT_EXPONENT;
+
+   }
+
+   public double getValue (double x, double y, double z)
+   {
+      assert (sourceModules[0] != null);
+
+      double value = sourceModules[0].getValue (x, y, z);
+      return (Math.pow (Math.abs ((value + 1.0) / 2.0), exponent) * 2.0 - 1.0);
+   }
+
+   /// Returns the exponent value to apply to the output value from the
+   /// source module.
+   ///
+   /// @returns The exponent value.
+   public double getExponent ()
+   {
+      return exponent;
+   }
+
+   public void setExponent(double exponent)
+   {
+      this.exponent = exponent;
+   }
+
+}