beta2d.java

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/**    
  * Copyright (C) 2006, Laboratorio di Valutazione delle Prestazioni - Politecnico di Milano

  * This program 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 2 of the License, or
  * (at your option) any later version.

  * This program 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 this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
  
package jmt.engine.jaba;

import Jama.Matrix;

import java.util.Vector;

/**
 * Created by IntelliJ IDEA.
 * User: PoliMi
 * Date: 25-lug-2005
 * Time: 10.48.18
 * To change this template use File | Settings | File Templates.
 */
public class Beta2D {

    double EPSYLON = 0.0001;        //costante per le approssimazioni

    /**
     * Dati due punti p1 e p2 il metodo ritorna le beta del settore di saturazione
     * attraverso la soluzione di un sistema lineare.
     * @param p1
     * @param p2
     * @return un settore Sector2D con le coordinate nello spazio delle Beta e i Service
     * Demands associati.
     */
    public Sector2D BetaCalc2D(newPoint p1,newPoint p2)
    {
        double[][] arraya =
        {
            {1,1,0,0},
            {0,0,1,1},
            {-p2.getX(),0,p1.getX(),0},
            {0,p2.getY(),0,-p1.getY()}
        };
        double[][] arrayb = {{1},{1},{0},{0}};
        Matrix A = new Matrix(arraya);
        Matrix b = new Matrix(arrayb);
        Matrix x = A.solve(b);
        // Creo un nuovo settore con le soluzioni e i punti associati
        Sector2D out = new Sector2D(x.get(0,0),x.get(1,0),x.get(2,0),x.get(3,0),p1,p2);
        return out;
    }

    /**
     * Dato un vettore di vertici ritorna un vettore di double[] che rappresentano
     * le beta e i punti del settore a cui