Html飞机大战(十八): 模块化+项目开源

好家伙,好久好久没有更新这个系列了

 

为了使文档更方便阅读,使代码更容易维护,来把这个飞机大战模块化

项目已开源:

https://gitee.com/tang-and-han-dynasties/airplane-battle---h.git

项目结构如下:

最大的改动是主启动类进行了修改:

我们将曾经部分的全局方法,和循环计时器封装到类的方法中

main.js文件如下:

class Main {
    //一下全为全局变量或方法 (全局的!!)

    //主启动方法
    maingame() {

        const sky = new Sky(SKY);
        //初始化一个飞机界面加载实例
        const loading = new Loading(LOADING);
        //初始化一个英雄实例 英雄是会变的
        let hero = new Hero(HERO);
        //该变量中有所有的敌机实例
        let enemies = [];
        //该变量中存放所有的奖励实例
        let awards = [];
        //敌机产生的速率
        let ENEMY_CREATE_INTERVAL = 800;
        let ENEMY_LASTTIME = new Date().getTime();

        function stateControl() {
            //为canvas绑定一个点击事件 且他如果是START状态的时候需要修改成STARTING状态
            canvas.addEventListener("click", () => {
                if (state === START) {
                    state = STARTING;
                }
            });
            // 为canvas绑定一个鼠标移动事件 鼠标正好在飞机图片的正中心
            canvas.addEventListener("mousemove", (e) => {
                let x = e.offsetX;
                let y = e.offsetY;
                hero.x = x - hero.width / 2;
                hero.y = y - hero.height / 2;
            });
            // 为canvas绑定一个鼠标离开事件 鼠标离开时 RUNNING -> PAUSE
            canvas.addEventListener("mouseleave", () => {
                if (state === RUNNING) {
                    state = PAUSE;
                }
            });
            // 为canvas绑定一个鼠标进入事件 鼠标进入时 PAUSE => RUNNING
            canvas.addEventListener("mouseenter", () => {
                if (state === PAUSE) {
                    state = RUNNING;
                }
            });
            //为canvas绑定一个屏幕移动触摸点事件 触碰点正好在飞机图片的正中心
            canvas.addEventListener("touchmove", (e) => {
                // let x = e.pageX;
                // let y = e.pageY;
                console.log(e);
                // let x = e.touches[0].clientX;
                // let y = e.touches[0].clinetY;
                let x = e.touches[0].pageX;
                let y = e.touches[0].pageY;
                // let x = e.touches[0].screenX;
                // let y = e.touches[0].screenY;
                let write1 = (document.body.clientWidth - 480) / 2;
                let write2 = (document.body.clientHeight - 650) / 2;
                hero.x = x - write1 - hero.width / 2;
                hero.y = y - write2 - hero.height / 2;

                // hero.x = x - hero.width / 2;
                // hero.y = y - hero.height / 2;
                console.log(x, y);
                console.log(document.body.clientWidth, document.body.clientHeight);
                e.preventDefault(); // 阻止屏幕滚动的默认行为

            })
        }
        stateControl();
        // 碰撞检测函数
        //此处的碰撞检测包括
        //1.子弹与敌机的碰撞
        //2.英雄与敌机的碰撞
        //3.英雄与随机奖励的碰撞
        function checkHit() {
            // 遍历所有的敌机
            for (let i = 0; i < awards.length; i++) {
                //检测英雄是否碰到奖励类
                if (awards[i].hit(hero)) {
                    //当然了,这个随机奖励的样式也要删了
                    awards.splice(i, 1);
                    //清除所有的敌机
                    // for (let i = 0; i < enemies.length; i++) {
                    //   enemies.splice(i, 1);
                    // }
                    enemies.length = 0;

                }
            }
            for (let i = 0; i < enemies.length; i++) {
                //检测英雄是否撞到敌机
                if (enemies[i].hit(hero)) {
                    //将敌机和英雄的destory属性改为true
                    enemies[i].collide();
                    hero.collide();
                }
                for (let j = 0; j < hero.bulletList.length; j++) {
                    enemies[i].hit(hero.bulletList[j]);
                    //检测子弹是否撞到敌机
                    if (enemies[i].hit(hero.bulletList[j])) {
                        //将敌机和子弹的destory属性改为true
                        enemies[i].collide();
                        hero.bulletList[j].collide();
                    }
                }
            }
        }
        // 全局函数 隔一段时间就来初始化一架敌机/奖励
        function createComponent() {
            const currentTime = new Date().getTime();
            if (currentTime - ENEMY_LASTTIME >= ENEMY_CREATE_INTERVAL) {
                let ran = Math.floor(Math.random() * 100);
                if (ran < 55) {
                    enemies.push(new Enemy(E1));
                } else if (ran < 85 && ran > 55) {
                    enemies.push(new Enemy(E2));
                } else if (ran < 95 && ran > 85) {
                    enemies.push(new Enemy(E3));
                } else if (ran > 95) {
                    awards.push(new award(C1));

                }

                ENEMY_LASTTIME = currentTime;
            }
        }
        // 全局函数 来判断所有的子弹/敌人组件 "负责移动"
        function judgeComponent() {
            for (let i = 0; i < hero.bulletList.length; i++) {
                hero.bulletList[i].move();
            }
            for (let i = 0; i < enemies.length; i++) {
                enemies[i].move();
            }
            for (let i = 0; i < awards.length; i++) {
                awards[i].move();
            }
        }
        // 全局函数 来绘制所有的子弹/敌人组件 绘制score&life面板
        function paintComponent() {
            for (let i = 0; i < hero.bulletList.length; i++) {
                hero.bulletList[i].paint(context);
            }
            for (let i = 0; i < enemies.length; i++) {
                enemies[i].paint(context);
            }
            for (let i = 0; i < awards.length; i++) {
                awards[i].paint(context);
            }
            context.font = "20px 微软雅黑";
            context.fillStyle = "green";
            context.textAlign = "left";
            context.fillText("score: " + score, 10, 20);
            context.textAlign = "right";
            context.fillText("life: " + life, 480 - 10, 20);
            //重置样式
            context.fillStyle = "black";
            context.textAlign = "left";
        }
        // 全局函数 来销毁所有的子弹/敌人组件 销毁掉英雄
        function deleteComponent() {
            if (hero.destory) {
                life--;
                hero.destory = false;
                if (life === 0) {
                    state = END;
                } else {
                    hero = new Hero(HERO);
                }
            }
            for (let i = 0; i < hero.bulletList.length; i++) {
                if (hero.bulletList[i].outOfBounds() || hero.bulletList[i].destory) {
                    hero.bulletList.splice(i, 1);
                }
            }
            for (let i = 0; i < enemies.length; i++) {
                if (enemies[i].outOfBounds() || enemies[i].destory) {
                    enemies.splice(i, 1);
                }
            }
        }

        //当图片加载完毕时,需要做某些事情
        bg.addEventListener("load", () => {
            setInterval(() => {
                switch (state) {
                    case START:
                        sky.judge();
                        sky.paint(context);
                        let logo_x = (480 - copyright.naturalWidth) / 2;
                        let logo_y = (650 - copyright.naturalHeight) / 2;
                        context.drawImage(copyright, logo_x, logo_y);
                        break;
                    case STARTING:
                        sky.judge();
                        sky.paint(context);
                        loading.judge();
                        loading.paint(context);
                        break;
                    case RUNNING:
                        sky.judge();
                        sky.paint(context);
                        hero.judge();
                        hero.paint(context);
                        hero.shoot();
                        createComponent();
                        judgeComponent();
                        deleteComponent();
                        paintComponent();
                        checkHit();
                        break;
                    case PAUSE:
                        let pause_x = (480 - pause.naturalWidth) / 2;
                        let pause_y = (650 - pause.naturalHeight) / 2;
                        context.drawImage(pause, pause_x, pause_y);
                        break;
                    case END:
                        //给我的画笔设置一个字的样式
                        //后面写出来的字都是这个样式的
                        context.font = "bold 24px 微软雅黑";
                        context.textAlign = "center";
                        context.textBaseline = "middle";
                        context.fillText("GAME_OVER", 480 / 2, 650 / 2);
                        break;
                }
            }, 10);
        });

        //背景切换方法
        // function changebg() {
        //     console.log("changebg方法被触发")
        //     bg.src = "img/background.png"
        // }
    }
}
let main_1 = new Main()
// main_1.stateControl();
main_1.maingame();

并将配置项分开来:

以下配置归到config.js文件中

// 初始化画布对象
const canvas = document.getElementById("canvas");
const context = canvas.getContext("2d");

// 定义游戏的状态
// 开始
const START = 0;
// 开始时
const STARTING = 1;
// 运行时
const RUNNING = 2;
// 暂停时
const PAUSE = 3;
// 结束时
const END = 4;

//state表示游戏的状态 取值必须是以上的五种状态
let state = START;
//score 分数变量 life 变量
let score = 0;
let life = 3;