/* Copyright (C) 2011 Garrett Fleenor
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3.0 of the License, or (at
your option) any later version.
This library 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 Lesser General Public
License (COPYING.txt) for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
This is a port of libnoise ( http://libnoise.sourceforge.net/index.html ). Original implementation by Jason Bevins
*/
package com.bioxx.libnoise.module.modifier;
import com.bioxx.libnoise.exception.NoModuleException;
import com.bioxx.libnoise.module.Module;
public class Exponent extends Module {
public static final double DEFAULT_EXPONENT = 1.0;
protected double exponent = DEFAULT_EXPONENT;
public Exponent() {
super(1);
}
public double getExponent() {
return exponent;
}
public void setExponent(double exponent) {
this.exponent = exponent;
}
@Override
public int GetSourceModuleCount() {
return 1;
}
@Override
public double GetValue(double x, double y, double z) {
if (SourceModule[0] == null)
throw new NoModuleException();
double value = SourceModule[0].GetValue(x, y, z);
return (Math.pow(Math.abs((value + 1.0) / 2.0), exponent) * 2.0 - 1.0);
}
}