// $Id: LineObstruction.java,v 1.7.4.4 2003/09/10 03:41:52 mdwelsh Exp $

/**
 * line (wall) obstruction for use by the ObstructRadioModelPlugin class
 *
 * @author Jeff Rupp
 */


package net.tinyos.sim.plugins;

import java.util.*;

public class LineObstruction implements ObstructionIF
{
    private double m_x1 = 0.0;
    private double m_y1 = 0.0;
    private double m_x2 = 0.0;
    private double m_y2 = 0.0;
    private double m_atten = 0.0;
    private java.awt.geom.Line2D.Double m_asLine2d=null;
    private java.awt.geom.Line2D.Double m_pixelLine2d=null;
    protected net.tinyos.sim.CoordinateTransformer m_coordTx;


    /**
     * ctor used when loading from file, expect a comma separated list of appropriate
     *   values, where the first value is this class name
     */
    public LineObstruction(String params, net.tinyos.sim.CoordinateTransformer cT)
    {
        m_coordTx = cT;
        System.out.println("constructing a LineObstruction with params: " + params);
        // parse out the params, and construct ourselves
        StringTokenizer tok = new StringTokenizer(params, ",");
        // skip first string, since it is our class name
        String nextToken = tok.nextToken();
        try
        {
            m_x1 = Double.parseDouble(tok.nextToken());
            m_y1 = Double.parseDouble(tok.nextToken());
            m_x2 = Double.parseDouble(tok.nextToken());
            m_y2 = Double.parseDouble(tok.nextToken());
            m_atten = Double.parseDouble(tok.nextToken());
            m_asLine2d = new java.awt.geom.Line2D.Double(m_x1,m_y1,m_x2,m_y2);
            m_pixelLine2d = new java.awt.geom.Line2D.Double(m_coordTx.simXToGUIX(m_x1),
                                                            m_coordTx.simXToGUIX(m_y1),
                                                            m_coordTx.simXToGUIX(m_x2),
                                                            m_coordTx.simXToGUIX(m_y2));
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
            System.out.println("x1: "+m_x1+"  y1: "+m_y1+"  x2: "+m_x2+"  y2: "+m_y2+
                               "   atten: "+m_atten);
        }

    }

    public LineObstruction(double x1,double y1,double x2,double y2, double atten,
                           net.tinyos.sim.CoordinateTransformer cT)
    {
        m_x1 = x1;
        m_y1 = y1;
        m_x2 = x2;
        m_y2 = y2;
        m_atten = atten;
        m_asLine2d = new java.awt.geom.Line2D.Double(x1,y1,x2,y2);
        m_coordTx = cT;
    }

    /**
     * returns true if the given line intersects this object
     */
    public boolean Intersects(double x1,double y1,double x2,double y2)
    {
        if(m_asLine2d != null)
        {
            /*  no more accurate than as mote coordinates
            return m_pixelLine2d.intersectsLine(m_coordTx.simXToGUIX(x1),
                                                m_coordTx.simXToGUIX(y1),
                                                m_coordTx.simXToGUIX(x2),
                                                m_coordTx.simXToGUIX(y2));
            */
            return m_asLine2d.intersectsLine(x1,y1,x2,y2);
        }
        return false;
    }

    /**
     * draws this object to the provided context
     */
    public void draw(java.awt.Graphics g)
    {
        java.awt.Color origClr = g.getColor();
        g.setColor(java.awt.Color.black);
        g.drawLine((int)m_coordTx.simXToGUIX(m_x1),(int)m_coordTx.simXToGUIX(m_y1),
                   (int)m_coordTx.simXToGUIX(m_x2),(int)m_coordTx.simXToGUIX(m_y2));
        g.setColor(origClr);
    }


    /**
     * returns the amount of attenuation in dB associated with the obstruction
     */
    public double GetAttenuation()
    {
        return m_atten;
    }


}