splitbullet.java

仿雷电游戏. 设有三关,三个BOSS 采用多重继承. 代码模块化.

package org.game.simple;
/**
 * 
 * Copyright 2008 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 *
 * @project org.game.simple
 * @author xieting  
 * @version 0.1
 */
public class SplitBullet extends EnemyShot {
	private float x_ziki;

	private float y_ziki;

	private float x_enemy;

	private float y_enemy;

	private float distance;

	private float speed;

	private Battle ziki;

	private int counter;

	public SplitBullet(float x, float y, Battle ziki) {
		super(x, y, GamePanel.splitBulletImage);
		speed = 3F;
		x_ziki = ziki.x;
		y_ziki = ziki.y;
		x_enemy = x;
		y_enemy = y;
		distance = (float) Math.sqrt((x_ziki - x_enemy) * (x_ziki - x_enemy)
				+ (y_ziki - y_enemy) * (y_ziki - y_enemy));
		if (distance != 0.0F) {
			vx = ((x_ziki - x_enemy) / distance) * speed;
			vy = ((y_ziki - y_enemy) / distance) * speed;
		} else {
			vx = 0.0F;
			vy = speed;
		}
		counter = 0;
	}

	public void move() {
		x += vx;
		y += vy;
		if (counter == 50) {
			GamePanel.addList(new NBullets(x, y, (int) ((double) vx / 2D),
					(int) ((double) vy / 2D), ziki));
			dead();
		}
		if (x + WIDTH < 0.0F || x > (float) app.getWidth() || y + HEIGHT < 0.0F
				|| y > (float) app.getHeight())
			dead();
		counter++;
	}

}