/*
 * Point.java
 *
 * Created on July 5, 2002, 4:46 PM
 */

package uk.ac.leeds.ccg.projects.MedAction.FuzzyInference;

/**
 *
 * a fuzzy point is simply a double x, y value point which is the value in fuzzy variable definition,
 * but with a Color member as
 * the attribute for being painted in FuzzyPanel. when a point is being selected
 * it will be set by another color for showing being selected in fuzzy panel, fuzzy panel's
 * custamized paintComponent() method will take every point's color and use it to paint them.
 * please be aware that the point x, y value is not the position in a fuzzy panel, but the 
 * position value in a theriotical fuzzy variable value space. fuzzy panel will get the x, y value
 * and calculate the screen position in fuzzy panel.
 *
 * @author  jianhui jin
 */
import java.awt.Color;
import java.awt.geom.Point2D;
public class FuzzyPoint extends java.awt.geom.Point2D.Double implements java.io.Serializable {
    // color for this point to be painted in a fuzzyPanel,
    private Color color = Color.black;
    
    /** Creates a new instance of Point */
    public FuzzyPoint(){
        super();
    }
    /**
     * create a fuzzy point with double value x, y, fuzzy point
     * the value is not the screen position, is the value in fuzzy variable definition.
     * @param x
     * @param y
     */    
    public FuzzyPoint( double x, double y ) {
        super( x, y );
    }
    /**
     * set the point location in a fuzzy variable
     * @param x
     * @param y
     */    
    public void setLocation( double x, double y ) {
        super.setLocation( x, y );
    }
    
    /**
     * calculate the distance between two fuzzy points in fuzzy variable space.
     * @param p1
     * @param p2
     * @return a double value
     */    
    public static double distance( Point2D p1, Point2D p2 ) {
        return Math.sqrt( ( p1.getX() - p2.getX() ) * ( p1.getX() - p2.getX() ) + ( p1.getY() - p2.getY() ) * ( p1.getY() - p2.getY() ) );
    }
    
    /**
     * get double value x
     * @return
     */    
    public double getX() { return super.getX(); }
    /**
     * get double value y
     * @return
     */    
    public double getY() { return super.getY();}
 
    /**
     * set double value x
     * @param x
     */    
    public void setX( double x ) {
        super.setLocation( x, getY() );
    }
    /**
     * set double value y
     * @param y
     */    
    public void setY( double y ) {
        super.setLocation( getX(), y );   
    }
    
    /**
     * get the color of this point
     * @return an Color Object
     */    
    public Color getColor() {
        return color;
    }
    
    /**
     * set the color of this point
     * @param color
     */    
    public void setColor( Color color ) {
        this.color = color;
    }
    
}