1 Star 5 Fork 1

Roderick Xiang/贪吃蛇

加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
AFL-3.0

一切先从核心玩法开始

首先贪吃蛇的运动是发生在一个规范的矩阵中,而矩阵中的每一方格就是蛇的身子,而蛇的运动就是一次一次更新正方形的位置,然后通过panel绘制上去
所以我们使用两个数组来储存贪吃蛇的位置,snakeX用来储存横坐标,而snakeY用来储存纵坐标的位置

//贪吃蛇初始的位置(一个头,两个身子)
public Snake() {
        snakeX[0] = 400;
        snakeY[0] = 400;
        snakeX[1] = 380;
        snakeY[1] = 400;
        snakeX[2] = 360;
        snakeY[2] = 400;
    }

如何运动

我们只要更新蛇的位置就能让它动起来了,所以我们定义两个速度"speedX"和"speedY"用来控制头的位置
只动了头并没有用,还有身子,我们只需要用从尾巴开始使用循环继承上一个身体的位置,知道继承头部位置

    public void move() {
        //身体跟着头走
        for (int i = length - 1; i > 0; i--) {
            snakeX[i] = snakeX[i - 1];
            snakeY[i] = snakeY[i - 1];
        }
        snakeX[0] += speedX;
        snakeY[0] += speedY;
        isTmpMove = true;
        checkBoundaries();
        System.out.format("%d %d\n", snakeX[0], snakeY[0]);
    }

控制蛇头的方向

为了跟好的控制小蛇,直接控制蛇头来的最为直接。但是这里有一个会产生BUG的点,蛇头不能做反方向运动,所以我们还要给蛇头添加一个方向"direction"属性,只有当按键按下和方向条件满足时才能改变蛇头的运动方向

public void changeDirection(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_UP && !direction.equals("down")) {
        direction = "up";
        speedX = 0;
        speedY = -20;
    } else if (e.getKeyCode() == KeyEvent.VK_DOWN && !direction.equals("UP")) {
        direction = "down";
        speedX = 0;
        speedY = 20;
    } else if (e.getKeyCode() == KeyEvent.VK_RIGHT && !direction.equals("left")) {
        direction = "right";
        speedX = 20;
        speedY = 0;
    } else if (e.getKeyCode() == KeyEvent.VK_LEFT && !direction.equals("right")) {
        direction = "left";
        speedX = -20;
        speedY = 0;
    }
    isTmpMove = false;
}

游戏界面

游戏界面我们使用Jframe来实现(我好方便实现关闭功能)
写一个类类继承Jframe,在里面添加面板并且进行初始化设置

public class MyFrame extends JFrame {
    public void init() {
        JFrame frame = new JFrame();
        setTitle("贪吃蛇");
        setResizable(false);
        setBounds(300,100,865,830); //840 *780 (界面的大小一定要设置正确)
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //添加Panel
        GamePanel panel = new GamePanel();
        add(panel);
        setVisible(true);
    }
}

绘制游戏内容

已经添加了JPanal(GamePanel),所以到Jpanal中添加游戏中需要绘制的内容
在Jpanal中重写paintComponent就能在实例化Jpanal时使用画笔绘制图像(方法自行被调用),这个类也是作为游戏的主类

class MyPaint extends JPanel {}
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);    //清屏
        g.setColor(Color.BLACK);
        g.fillRect(100,100,100,100);
        //绘制所有的功能,省略不写......
    }
}

所以有这个就能画小蛇了!

让一切都动起来

为了有运动的效果,我们使用循环实现,这里我们使用ActionListener(函数式接口)用作定时器,我们实现一下接口里面的actionPerformed方法在方法里写需要定时执行的事件。定时器使用timer.start()开启

//执行定时操作
@Override
public void actionPerformed(ActionEvent e) {
    snake.move();
    snake.checkEatFood(food);
    food.changeFoodPosition();  //更改食物的位置
    snake.checkCollide();   //碰撞检测
    repaint();  //重新绘制图像
}

获取键盘事件

实现KeyListener接口来进行事件监听
使用之间还要设置监听

JPanal.setFocusable(true); //设置监听焦点
Jpanal.addKeyListener(this);   //添加键盘监听事件
接口中有三个抽象方法<br>
public void keyPressed(KeyEvent e) {
    int keycode = e.getKeyCode();
    if (keycode == KeyEvent.VK_SPACE) {
        isStart = !isStart;
        if (isStart) {
            timer.start();
        }
    } else if (snake.isTmpMove) {   //判断小蛇是否移动,避免蛇头折回
        snake.changeDirection(e);
    }
    repaint();
}

游戏功能实现

穿墙效果

public void checkBoundaries() {
    if (snakeX[0] > 840) {
        snakeX[0] = 0;
    } else if (snakeX[0] < 0) {
        snakeX[0] = 840;
    } else if (snakeY[0] > 780) {
        snakeY[0] = 0;
    } else if (snakeY[0] < 0) {
        snakeY[0] = 780;
    }
}

蛇的身子变长(重点)

我们让小蛇的尾部变长而不是头部,所以要参考蛇身最后的参数,并且获取速度
速度使用前坐标减后左边产生的差值得到
增加的位置通过蛇尾减速度得到

public void getLonger(Food food) {
    if (food.isEat) {
        Point.getNormalFoodPoint();
        snakeX[length] = snakeX[length - 1] - (snakeX[length - 2] - snakeX[length - 1]);
        snakeY[length] = snakeY[length - 1] - (snakeY[length - 2] - snakeY[length - 1]);
        length++;
    } else if (food.isBonusEat) {
        Point.getBonusFoodPoint();
        snakeX[length] = snakeX[length - 1] - (snakeX[length - 2] - snakeX[length - 1]);
        snakeY[length] = snakeY[length - 1] - (snakeY[length - 2] - snakeY[length - 1]);
        length++;
        food.isBonusEat = false;
    }
}

碰撞检测

遍历除了蛇头以外的位置,当坐标有相同的时候停止游戏

public void checkCollide() {
    for (int i = 1; i < length; i++) {
        if (snakeX[i] == snakeX[0] && snakeY[i] == snakeY[0]) {
            GamePanel.isDead = true;
            System.out.format("%d %d %d %d\n", snakeX[i], snakeY[i], snakeX[0], snakeY[0]);
            break;
        }
    }
}

检测吃食物

判断头部位置是否与食物重叠就行
特殊食物还需要判断下是否存在

public void checkEatFood(Food food) {
    if (snakeX[0] == food.normalX && snakeY[0] == food.normalY) {
        food.isEat = true;
        getLonger(food);
    } else if (snakeX[0] == food.bonusX && snakeY[0] == food.bonusY && food.hasBonus) {
        food.isBonusEat = true;
        food.hasBonus = false;
        getLonger(food);
    }
}

计分系统

使用BufferReader和BufferWriter读写记录,获取最高分

public static void writeResult() throws IOException {
    BufferedWriter bw = new BufferedWriter(new FileWriter("记录.txt", true));
    bw.write("player" + "\t" + point);
    bw.newLine();
    bw.close();
}
public static void readBestResult() throws IOException {
    BufferedReader br = new BufferedReader(new FileReader("记录.txt"));
    String line;
    int score;
    while ((line = br.readLine()) != null) {
        String[] tmp = line.split("\t");
        score = Integer.parseInt(tmp[1]);
        if (score > bestScore) {
            bestScore = score;
        }
    }
}
Academic Free License (“AFL”) v. 3.0 This Academic Free License (the "License") applies to any original work of authorship (the "Original Work") whose owner (the "Licensor") has placed the following licensing notice adjacent to the copyright notice for the Original Work: Licensed under the Academic Free License version 3.0 1) Grant of Copyright License. Licensor grants You a worldwide, royalty-free, non-exclusive, sublicensable license, for the duration of the copyright, to do the following: a) to reproduce the Original Work in copies, either alone or as part of a collective work; b) to translate, adapt, alter, transform, modify, or arrange the Original Work, thereby creating derivative works ("Derivative Works") based upon the Original Work; c) to distribute or communicate copies of the Original Work and Derivative Works to the public, under any license of your choice that does not contradict the terms and conditions, including Licensor’s reserved rights and remedies, in this Academic Free License; d) to perform the Original Work publicly; and e) to display the Original Work publicly. 2) Grant of Patent License. Licensor grants You a worldwide, royalty-free, non-exclusive, sublicensable license, under patent claims owned or controlled by the Licensor that are embodied in the Original Work as furnished by the Licensor, for the duration of the patents, to make, use, sell, offer for sale, have made, and import the Original Work and Derivative Works. 3) Grant of Source Code License. The term "Source Code" means the preferred form of the Original Work for making modifications to it and all available documentation describing how to modify the Original Work. Licensor agrees to provide a machine-readable copy of the Source Code of the Original Work along with each copy of the Original Work that Licensor distributes. Licensor reserves the right to satisfy this obligation by placing a machine-readable copy of the Source Code in an information repository reasonably calculated to permit inexpensive and convenient access by You for as long as Licensor continues to distribute the Original Work. 4) Exclusions From License Grant. Neither the names of Licensor, nor the names of any contributors to the Original Work, nor any of their trademarks or service marks, may be used to endorse or promote products derived from this Original Work without express prior permission of the Licensor. Except as expressly stated herein, nothing in this License grants any license to Licensor’s trademarks, copyrights, patents, trade secrets or any other intellectual property. No patent license is granted to make, use, sell, offer for sale, have made, or import embodiments of any patent claims other than the licensed claims defined in Section 2. No license is granted to the trademarks of Licensor even if such marks are included in the Original Work. Nothing in this License shall be interpreted to prohibit Licensor from licensing under terms different from this License any Original Work that Licensor otherwise would have a right to license. 5) External Deployment. The term "External Deployment" means the use, distribution, or communication of the Original Work or Derivative Works in any way such that the Original Work or Derivative Works may be used by anyone other than You, whether those works are distributed or communicated to those persons or made available as an application intended for use over a network. As an express condition for the grants of license hereunder, You must treat any External Deployment by You of the Original Work or a Derivative Work as a distribution under section 1(c). 6) Attribution Rights. You must retain, in the Source Code of any Derivative Works that You create, all copyright, patent, or trademark notices from the Source Code of the Original Work, as well as any notices of licensing and any descriptive text identified therein as an "Attribution Notice." You must cause the Source Code for any Derivative Works that You create to carry a prominent Attribution Notice reasonably calculated to inform recipients that You have modified the Original Work. 7) Warranty of Provenance and Disclaimer of Warranty. Licensor warrants that the copyright in and to the Original Work and the patent rights granted herein by Licensor are owned by the Licensor or are sublicensed to You under the terms of this License with the permission of the contributor(s) of those copyrights and patent rights. Except as expressly stated in the immediately preceding sentence, the Original Work is provided under this License on an "AS IS" BASIS and WITHOUT WARRANTY, either express or implied, including, without limitation, the warranties of non-infringement, merchantability or fitness for a particular purpose. THE ENTIRE RISK AS TO THE QUALITY OF THE ORIGINAL WORK IS WITH YOU. This DISCLAIMER OF WARRANTY constitutes an essential part of this License. No license to the Original Work is granted by this License except under this disclaimer. 8) Limitation of Liability. Under no circumstances and under no legal theory, whether in tort (including negligence), contract, or otherwise, shall the Licensor be liable to anyone for any indirect, special, incidental, or consequential damages of any character arising as a result of this License or the use of the Original Work including, without limitation, damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses. This limitation of liability shall not apply to the extent applicable law prohibits such limitation. 9) Acceptance and Termination. If, at any time, You expressly assented to this License, that assent indicates your clear and irrevocable acceptance of this License and all of its terms and conditions. If You distribute or communicate copies of the Original Work or a Derivative Work, You must make a reasonable effort under the circumstances to obtain the express assent of recipients to the terms of this License. This License conditions your rights to undertake the activities listed in Section 1, including your right to create Derivative Works based upon the Original Work, and doing so without honoring these terms and conditions is prohibited by copyright law and international treaty. Nothing in this License is intended to affect copyright exceptions and limitations (including “fair use” or “fair dealing”). This License shall terminate immediately and You may no longer exercise any of the rights granted to You by this License upon your failure to honor the conditions in Section 1(c). 10) Termination for Patent Action. This License shall terminate automatically and You may no longer exercise any of the rights granted to You by this License as of the date You commence an action, including a cross-claim or counterclaim, against Licensor or any licensee alleging that the Original Work infringes a patent. This termination provision shall not apply for an action alleging patent infringement by combinations of the Original Work with other software or hardware. 11) Jurisdiction, Venue and Governing Law. Any action or suit relating to this License may be brought only in the courts of a jurisdiction wherein the Licensor resides or in which Licensor conducts its primary business, and under the laws of that jurisdiction excluding its conflict-of-law provisions. The application of the United Nations Convention on Contracts for the International Sale of Goods is expressly excluded. Any use of the Original Work outside the scope of this License or after its termination shall be subject to the requirements and penalties of copyright or patent law in the appropriate jurisdiction. This section shall survive the termination of this License. 12) Attorneys’ Fees. In any action to enforce the terms of this License or seeking damages relating thereto, the prevailing party shall be entitled to recover its costs and expenses, including, without limitation, reasonable attorneys' fees and costs incurred in connection with such action, including any appeal of such action. This section shall survive the termination of this License. 13) Miscellaneous. If any provision of this License is held to be unenforceable, such provision shall be reformed only to the extent necessary to make it enforceable. 14) Definition of "You" in This License. "You" throughout this License, whether in upper or lower case, means an individual or a legal entity exercising rights under, and complying with all of the terms of, this License. For legal entities, "You" includes any entity that controls, is controlled by, or is under common control with you. For purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. 15) Right to Use. You may use the Original Work in all ways not otherwise restricted or conditioned by this License or by law, and Licensor promises not to interfere with or be responsible for such uses by You. 16) Modification of This License. This License is Copyright © 2005 Lawrence Rosen. Permission is granted to copy, distribute, or communicate this License without modification. Nothing in this License permits You to modify this License as applied to the Original Work or to Derivative Works. However, You may modify the text of this License and copy, distribute or communicate your modified version (the "Modified License") and apply it to other original works of authorship subject to the following conditions: (i) You may not indicate in any way that your Modified License is the "Academic Free License" or "AFL" and you may not use those names in the name of your Modified License; (ii) You must replace the notice specified in the first paragraph above with the notice "Licensed under <insert your license name here>" or with a notice of your own that is not confusingly similar to the notice in this License; and (iii) You may not claim that your original works are open source software unless your Modified License has been approved by Open Source Initiative (OSI) and You comply with its license review and certification process.

简介

Java开发,超级简陋的用Jframe写的贪吃蛇,有详细的开发文档 展开 收起
Java
AFL-3.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

不能加载更多了
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
Java
1
https://gitee.com/RoderickXiang/snake.git
git@gitee.com:RoderickXiang/snake.git
RoderickXiang
snake
贪吃蛇
master

搜索帮助