package eu.fbk.shell.mdfsa.data.structures;
   
   import java.io.Serializable;
   
   public class FuzzyMembership implements Serializable {
   
     private static final long serialVersionUID = 1L;
     
     private double a;
    private double b;
    private double c;
    private double d;
    
    public FuzzyMembership(double a, double b, double c, double d) {
      this.a = a;
      this.b = b;
      this.c = c;
      this.d = d;
    }
  
    
    public double getA() {
      return a;
    }
  
    public void setA(double a) {
      this.a = a;
    }
  
    public double getB() {
      return b;
    }
  
    public void setB(double b) {
      this.b = b;
    }
  
    public double getC() {
      return c;
    }
  
    public void setC(double c) {
      this.c = c;
    }
  
    public double getD() {
      return d;
    }
  
    public void setD(double d) {
      this.d = d;
    }
    
    public double getCentroid(double oldFlag) {
      double centroid = (this.b + this.c) / 2.0;
      //if(this.b < 0 && this.c > 0) {
      //  centroid = 0.0;
      //}
      return centroid;
    }
    
    public double getCentroid() {
      double centroid = 0.0;
      
      if(this.b == this.d) {
        centroid = this.b;
      } else if(this.a == this.c) {
        centroid = this.a;
      } else {
        double xCoeffR1 = 1 / (this.b - this.d);
        double yCoeffR1 = 1.0;
        double cCoeffR1 = (this.d / (this.b - this.d)) * -1;
        double xCoeffR2 = 1 / (this.c - this.a);
        double yCoeffR2 = 1.0;
        double cCoeffR2 = (this.a / (this.c - this.a)) * -1;
        double x = (cCoeffR1 - cCoeffR2) / (xCoeffR1 - xCoeffR2);
        centroid = x;
      }
      
      return centroid;
    }
    
    
    
    public double getCentroidXAxis() {
      double centroid = 0.0;
      
      double num = (c * c) + (d * d) + (c * d) - (a * a) - (b * b) - (a * b);
      double den = 3 * (c + d - a - b);
      centroid = num / den;
      
      return centroid;
    }
    
  }