package com.trilogy.fs.raptor.clustering; 
 
/** 
 * @author <A HREF="mailto:razvan.surdulescu@trilogy.com">Razvan Surdulescu</A>, (C) Trilogy 2003 
 */ 
public class Dot { 
    private int m_x, m_y; 
 
    public Dot(int x, int y) { 
        m_x = x; 
        m_y = y; 
    } 
 
    public int getX() { 
        return m_x; 
    } 
 
    public int getY() { 
        return m_y; 
    } 
 
    public double getWeight(Dot other, double spatialRadius, double spatialDelta) { 
        double deltaX = getX() - other.getX(); 
        double deltaY = getY() - other.getY(); 
        double distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY); 
        if (distance < spatialRadius) { 
            return Math.exp(-1 * distance / spatialDelta); 
        } else { 
            return 0; 
        } 
    } 
 
    public String toString() { 
        StringBuffer result = new StringBuffer(); 
        result.append("x=").append(m_x).append(",y=").append(m_y); 
        return result.toString(); 
    } 
}