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diff --git a/src/libnoiseforjava/module/ScaleBias.java b/src/libnoiseforjava/module/ScaleBias.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 ScaleBias extends ModuleBase
+{
+
+   /// Noise module that applies a scaling factor and a bias to the output
+   /// value from a source module.
+   ///
+   /// The getValue() method retrieves the output value from the source
+   /// module, multiplies it with a scaling factor, adds a bias to it, then
+   /// outputs the value.
+   ///
+   /// This noise module requires one source module.
+
+   /// Default bias for the ScaleBias noise module.
+   static final double DEFAULT_BIAS = 0.0;
+
+   /// Default scale for the ScaleBias noise module.
+   static final double DEFAULT_SCALE = 1.0;
+
+   /// Bias to apply to the scaled output value from the source module.
+   double bias;
+
+   /// Scaling factor to apply to the output value from the source
+   /// module.
+   double scale;
+
+   
+   public ScaleBias (ModuleBase sourceModule) throws ExceptionInvalidParam
+   {
+      super(1);
+      setSourceModule(0, sourceModule);
+      bias = DEFAULT_BIAS;
+      scale = DEFAULT_SCALE;
+   }
+
+   public double getValue (double x, double y, double z)
+   {
+      assert (sourceModules[0] != null);
+
+      return sourceModules[0].getValue (x, y, z) * scale + bias;
+   }
+
+   /// Returns the bias to apply to the scaled output value from the
+   /// source module.
+   ///
+   /// @returns The bias to apply.
+   ///
+   /// The getValue() method retrieves the output value from the source
+   /// module, multiplies it with the scaling factor, adds the bias to
+   /// it, then outputs the value.
+   public double getBias ()
+   {
+      return bias;
+   }
+
+   /// Returns the scaling factor to apply to the output value from the
+   /// source module.
+   ///
+   /// @returns The scaling factor to apply.
+   ///
+   /// The getValue() method retrieves the output value from the source
+   /// module, multiplies it with the scaling factor, adds the bias to
+   /// it, then outputs the value.
+   public double getScale ()
+   {
+      return scale;
+   }
+
+
+   /// Sets the bias to apply to the scaled output value from the source
+   /// module.
+   ///
+   /// @param bias The bias to apply.
+   ///
+   /// The getValue() method retrieves the output value from the source
+   /// module, multiplies it with the scaling factor, adds the bias to
+   /// it, then outputs the value.
+   public void setBias (double bias)
+   {
+      this.bias = bias;
+   }
+
+   /// Sets the scaling factor to apply to the output value from the
+   /// source module.
+   ///
+   /// @param scale The scaling factor to apply.
+   ///
+   /// The getValue() method retrieves the output value from the source
+   /// module, multiplies it with the scaling factor, adds the bias to
+   /// it, then outputs the value.
+   public void setScale (double scale)
+   {
+      this.scale = scale;
+   }
+
+}