content: // ===============================================================================
  // Authors: AFRL/RQQD
  // Organization: Air Force Research Laboratory, Aerospace Systems Directorate, Power and Control Division
  // 
  // Copyright (c) 2017 Government of the United State of America, as represented by
  // the Secretary of the Air Force.  No copyright is claimed in the United States under
  // Title 17, U.S. Code.  All Other Rights Reserved.
  // ===============================================================================
  
  /*
   * GRAL: GRAphing Library for Java(R)
   *
   * (C) Copyright 2009-2013 Erich Seifert <dev[at]erichseifert.de>,
   * Michael Seifert <mseifert[at]error-reports.org>
   *
   * This file is part of GRAL.
   *
   * GRAL 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 of the License, or
   * (at your option) any later version.
   *
   * GRAL 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 for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with GRAL.  If not, see <http://www.gnu.org/licenses/>.
   */
  package de.erichseifert.gral.plots.colors;
  
  import java.awt.Color;
  import java.awt.Paint;
  
  import de.erichseifert.gral.util.MathUtils;
  
  /**
   * Class that generates the colors of a rainbow.
   */
  public class RainbowColors extends ScaledContinuousColorMapper {
  	/** Version id for serialization. */
  	private static final long serialVersionUID = 6096507341747323265L;
  
  	/**
  	 * Returns the Paint according to the specified value.
  	 * @param value Value of color.
  	 * @return Paint.
  	 */
  	@Override
  	public Paint get(double value) {
  		Double v = scale(value);
  		v = applyMode(v, 0.0, 1.0);
  		if (!MathUtils.isCalculatable(v)) {
  			return null;
  		}
  
  		float hue = v.floatValue();
  		return Color.getHSBColor(hue, 1f, 1f);
  	}
  
  	@Override
  	public void setMode(Mode mode) {
  		super.setMode(mode);
  	}
  }
  