/*
 * Copyright (c) 2006, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: RandomPositioner.java,v 1.2 2009/02/18 12:07:19 fros4943 Exp $
 */

package se.sics.cooja.positioners;
import java.util.Random;

import se.sics.cooja.*;

/**
 * Generates positions randomly distributed in a given interval.
 *
 * @author Fredrik Osterlind
 */
@ClassDescription("Random positioning")
public class RandomPositioner extends Positioner {
  double startX, endX, startY, endY, startZ, endZ;

  private Random random = new Random(); /* Do not use main random generator for setup */

  /**
   * Creates a random positioner.
   * @param totalNumberOfMotes Total number of motes
   * @param startX X interval start
   * @param endX X interval end
   * @param startY Y interval start
   * @param endY Y interval end
   * @param startZ Z interval start
   * @param endZ Z interval end
   */
  public RandomPositioner(int totalNumberOfMotes,
			  double startX, double endX,
			  double startY, double endY,
			  double startZ, double endZ) {
    this.startX = startX;
    this.endX = endX;
    this.startY = startY;
    this.endY = endY;
    this.startZ = startZ;
    this.endZ = endZ;
  }

  public double[] getNextPosition() {
    return new double[] {
        startX + random.nextDouble()*(endX - startX),
        startY + random.nextDouble()*(endY - startY),
        startZ + random.nextDouble()*(endZ - startZ)
    };
  }

}
