/* MRV.java - Maneuvering Reentry Vehicle. */

/* 
 * Copyright (C) 1996 Mark Boyns <boyns@sdsu.edu>
 *
 * Missile Commando II
 * <URL:http://www.sdsu.edu/~boyns/java/mcii/>
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import java.awt.Graphics;
import java.awt.Color;
import java.awt.Image;

class MRV extends GameObject
{
    final int mrvWidth = 12;
    final int mrvHeight = 6;
    final int jump = 10;
    
    int x, y, endy, speed;
    Image mrvImage;
    MissileCommando parent;
    
    MRV (int startx, int starty, int endy, int speed, Image mrvImage, MissileCommando parent)
    {
	this.x = startx;
	this.y = starty;
	this.endy = endy;
	this.speed = speed;
	this.mrvImage = mrvImage;
	this.parent = parent;
    }

    void erase (Graphics g)
    {
	g.setColor (skyColor);
	g.fillOval (x - mrvWidth/2, y - mrvHeight/2, mrvWidth, mrvHeight);
	//g.fillRect (x - mrvWidth/2, y - mrvHeight/2, mrvWidth, mrvHeight);
    }

    void paint (Graphics g)
    {
	erase (g);
	
	if (!alive)
	{
	    return;
	}
	else if (explode)
	{
	    alive = false;
	    explode = false;
	    return;
	}

	double chance = Math.random ();
	if (chance < 0.25)
	{
	    x -= jump;
	}
	else if (chance > 0.75)
	{
	    x += jump;
	}
	
	y += speed;

	if (y > endy)
	{
	    alive = false;
	}
	
	if (alive)
	{
	    g.setColor (Color.orange);
	    g.fillOval (x - mrvWidth/2, y - mrvHeight/2, mrvWidth, mrvHeight);
	    //g.drawImage (mrvImage, x - mrvWidth/2, y - mrvHeight/2, mrvWidth, mrvHeight, parent);
	}
    }

    boolean collision (int x2, int y2, int range)
    {
	if (!alive || explode)
	{
	    return false;
	}
	
	int distance = (int) Math.sqrt (((x2 - x) * (x2 - x))
					+ ((y2 - y) * (y2 - y)));
	range += mrvWidth/2;
	return distance <= range;
    }

    boolean collision (int x2, int y2, int w, int h)
    {
	if (!alive || explode)
	{
	    return false;
	}
	
	return x >= x2 && x <= (x2 + w) && y >= y2 && y <= (y2 + h);
    }
}