EnemyBullet.java

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.Rectangle2D;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

public class EnemyBullet {
    private int x, y;
    private int dx, dy;
    private int size = 5;
    private int speed = 8; 
    private GamePanel panel;
    private Image bulletImage;
    private int enemyIndex;
    
    public EnemyBullet(GamePanel panel, int width, int startX, int startY, Car target, int enemyIndex) {
        this.panel = panel;
        this.enemyIndex = enemyIndex;
        this.x = startX + width/2; 
        this.y = startY;

        if (target != null) {
            int targetX = target.getX() + target.getWidth()/2;
            int targetY = target.getY() + target.getHeight()/2;
            int deltaX = targetX - x;
            int deltaY = targetY - y;
            double distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
            if(distance == 0)
                distance = 1;
            this.dx = (int)(speed * deltaX / distance);
            this.dy = (int)(speed * deltaY / distance);
        } else {
            this.dx = 0;
            this.dy = speed;
        }
        
        bulletImage= ImageManager.loadImage("images/enemyBullet.png");
    }

    public void shoot() {
        x += dx;
        y += dy;
    }
    
    public void draw(Graphics2D g2, double cameraX, double cameraY) {
        int drawX = (int)(x - cameraX - size/2);
        int drawY = (int)(y - cameraY - size/2);
        if (bulletImage != null) {
            g2.drawImage(bulletImage, drawX, drawY, size, size, null);
        } else {
            g2.setColor(Color.RED);
            g2.fillOval(drawX, drawY, size, size);
        }
    }
    
    public boolean isOffScreen() {
        TileMap tileMap = panel.getTileMap();
        if (tileMap == null) return false;
        int worldWidth = tileMap.getWidthPixels();
        int worldHeight = tileMap.tilesToPixels(tileMap.getHeight());
        return x < 0 || x > worldWidth || y < 0 || y > worldHeight;
    }
    
    public Rectangle2D.Double getBoundingRectangle() {
        return new Rectangle2D.Double(x - size/2, y - size/2, size, size);
    }
    
    public int getEnemyIndex() {
        return enemyIndex;
    }
}