missile.java

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package org.MyTank;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.List;

public class Missile {
    private int x, y;
    Direction dir;

    private TankWarGUI tw;
    private boolean good;
    private boolean live = true;

    public static final double XSPEED = 10.0;
    public static final double YSPEED = 10.0;

    public static final int WIDTH = 10;
    public static final int HEIGHT = 10;

    public Missile(int x, int y, Direction dir) {
	this.x = x;
	this.y = y;
	this.dir = dir;
    }

    public Missile(int x, int y, boolean good, Direction dir, TankWarGUI tw) {
	this(x, y, dir);
	this.good = good;
	this.tw = tw;
    }

    public void draw(Graphics g) {
	if (!this.live) {
	    tw.missiles.remove(this);
	    return;
	}
	Color c = g.getColor();
	if (!good) {
	    g.setColor(Color.BLACK);
	} else
	    g.setColor(Color.BLUE);
	g.fillOval(x, y, 10, 10);
	g.setColor(c);

	move();
    }

    private void move() {
	switch (dir) {
	case L:
	    x -= XSPEED;
	    break;
	case LU:
	    x -= XSPEED;
	    y -= YSPEED;
	    break;
	case U:
	    y -= YSPEED;
	    break;
	case RU:
	    x += XSPEED;
	    y -= YSPEED;
	    break;
	case R:
	    x += XSPEED;
	    break;
	case RD:
	    x += XSPEED;
	    y += YSPEED;
	    break;
	case D:
	    y += YSPEED;
	    break;
	case LD:
	    x -= XSPEED;
	    y += YSPEED;
	    break;
	}
	if (x < 0 || y < 0 || x > TankWarGUI.GAME_WIDTH
		|| y > TankWarGUI.GAME_HEIGHT) {
	    live = false;
	}
    }

    private Rectangle getRec() {
	return new Rectangle(x, y, WIDTH, HEIGHT);
    }

    private Explode getExp(Tank t) {
	int x, y;
	x = t.getRec().x;
	y = t.getRec().y;
	return new Explode(x, y, tw);
    }

    public boolean hitTank(Tank t) {
	if (this.live && this.getRec().intersects(t.getRec()) && t.isLive()
		&& this.good != t.isGood() && t.isLive()) {
	    if (t.isGood()){
		t.setLife(t.getLife() - 20);
		if(t.getLife() <= 0) t.setLive(false);
	    }else t.setLive(false);
		this.live = false;
		tw.explodes.add(this.getExp(t));
		return true;
	    }
	    
	return false;
    }

    public boolean hitWall(Wall w) {
	if (this.live && this.getRec().intersects(w.getRec())) {
	    this.live = false;
	    return true;
	}
	return false;
    }

    public boolean hitTanks(List<Tank> t) {
	for (int i = 0; i < t.size(); i++) {
	    if (hitTank(t.get(i)))
		return true;
	}
	return false;
    }
}