Boss.java

/*
* Authors: Jerry Li & Victor Jiang
* Date: June 13, 2025
* Description: This class manages basic functions and properties for the generic boss class from which specific bosses extend
*/

import java.awt.*;
import java.awt.image.BufferedImage;

public abstract class Boss extends Enemy {
    // Keeps track if boss has spawned its beautiful boss effects
    private boolean spawnedEffects = false;

    // Constructor
    public Boss(int x, int y, int width, int height, int hp, float speed,
            BufferedImage[] sprites, GamePanel gp) {
        super(x, y, width, height, hp, speed, sprites, gp);
    }

    // Moves the boss around each frame
    @Override
    public void move(float dt, Player player) {
        // Track how long boss update takes
        if (!spawnedEffects) {
            playSpawnEffects();
            spawnedEffects = true;
        }

        // Don't let a stunned boss move and countdown timer
        if (stunTimer > 0f) {
            stunTimer -= dt;
            if (stunTimer < 0f)
                stunTimer = 0f;
            x_velocity = 0f;
            y_velocity = 0f;
            return;
        }
        // Boss movement
        moveBoss(dt, player);

        // Sprite animation
        spriteTimer += dt;
        if (spriteTimer >= SPRITE_UPDATE_INTERVAL) {
            currentSpriteIndex = (currentSpriteIndex + 1) % sprites.length;
            spriteTimer -= SPRITE_UPDATE_INTERVAL;
        }

        // Stop tracking boss update time
    }

    // Effects when boss spawns
    protected void playSpawnEffects() {
        if (gamePanel != null) {
            gamePanel.startScreenShake(4f, 100f);
        }
    }

    // Handles how boss moves
    protected abstract void moveBoss(float dt, Player player);

    // Draws boss health bar on screen
    protected void drawBossHealthBar(Graphics2D g) {
        int barW = 0;
        int barH = 0;
        int bx = 0;
        int by = 0;
        float frac = 0f;
        barW = 300;
        barH = 12;
        bx = (int) (getCenterX() - barW / 2);
        by = (int) (getCenterY() + height / 2 + 10);
        frac = Math.max(0f, Math.min(1f, getHp() / (float) getMaxHp()));
        g.setColor(Color.DARK_GRAY);
        g.fillRect(bx, by, barW, barH);
        g.setColor(new Color(180, 70, 255));
        g.fillRect(bx, by, (int) (barW * frac), barH);
        g.setColor(Color.WHITE);
        g.drawRect(bx, by, barW, barH);
    }

    // Draws damage numbers on screen
    protected void drawDamageNumbers(Graphics2D g) {
        int i = 0;
        DamageNumber dn = null;
        for (i = 0; i < damageNumbers.size(); i++) {
            dn = damageNumbers.get(i);
            dn.draw(g);
        }
    }

    // Check if boss is boss!
    @Override
    public boolean isBoss() {
        return true;
    }
}