如何实现一个简单的跑酷游戏？（代码详解）-

采用的物理引擎是：Phaser.js

官网地址：http://phaser.io/

在这里对此引擎不做过多介绍（因为我也是小白，嘿嘿）

效果展示：

源码（详细源码图片资源访问：https://github.com/ProsperLee）

1.创建游戏舞台

 var cOnfig= {
    type: Phaser.AUTO,
    width: 800,
    height: 400,
    physics: {
        default: &＃39;arcade&＃39;,
        arcade: {
            gravity: {
                y: 300
            },
            debug: false
        }
    },
    scene: {
        preload: preload,
        create: create,
        update: update
    }
};

var game = new Phaser.Game(config); // 创建游戏

2.载入资源

function preload() {
    this.load.image(&＃39;sky&＃39;, &＃39;assets/sky.png&＃39;);
    this.load.image(&＃39;ground&＃39;, &＃39;assets/platform.png&＃39;);
     5      6     this.load.spritesheet(&＃39;dude&＃39;, &＃39;assets/dude.png&＃39;, {
        frameWidth: 32,
        frameHeight: 48
    });
}

3.将资源创建到舞台上

 var distanceText; // 路程文本
var distance = 0; // 路程
var platforms; // 地面
var player; // 玩家
var enemy; // 敌人
var enemys; // 敌人们
var enemyTimer; // 敌人计时器
var distanceTimer; // 路程计时器

function create() {
    // 添加画布背景
    this.add.image(400, 200, &＃39;sky&＃39;);
    // 添加分数文本
    distanceText = this.add.text(16, 16, &＃39;Distance: 0m&＃39;, {
        fontSize: &＃39;20px&＃39;,
        fill: &＃39;#000&＃39;
    });
    // 添加地面
    platforms = this.physics.add.staticGroup();
    platforms.create(400, 400, &＃39;ground&＃39;).setScale(3).refreshBody();
    // 添加玩家（精灵）
    player = this.physics.add.sprite(100, 300, &＃39;dude&＃39;);
    player.setBounce(0); // 设置阻力
    player.setCollideWorldBounds(true); // 禁止玩家走出世界

    // 敌人
    enemys = this.physics.add.group();
    enemys.children.iterate(function (child) {
        child.setCollideWorldBounds(false);
    });
    // 动态创建敌人
    enemyTimer = setInterval(function () {
        enemy = enemys.create(1000, 300, &＃39;dude&＃39;);
        enemy.setTint(getColor());
        enemy.anims.play(&＃39;left&＃39;, true);
        enemy.setVelocityX(Phaser.Math.Between(-300, -100));
    }, Phaser.Math.Between(4000, 8000))

    distanceTimer = setInterval(function () {
        distance += 1;
        distanceText.setText(&＃39;Distance: &＃39; + distance + &＃39;m&＃39;);
    }, 1000)

    this.physics.add.collider(player, platforms); //玩家在地面上
    this.physics.add.collider(enemys, platforms); //敌人在地面上
    this.physics.add.collider(player, enemys, hitBomb, null, this);
}

4.在创建场景过程中写键盘监听事件

var cursors; // 按键
    // 事件
    this.anims.create({
        key: &＃39;left&＃39;,
        frames: this.anims.generateFrameNumbers(&＃39;dude&＃39;, {
            start: 0,
            end: 3
        }),
        frameRate: 10,
        repeat: -1
    });

    this.anims.create({
        key: &＃39;right&＃39;,
        frames: this.anims.generateFrameNumbers(&＃39;dude&＃39;, {
            start: 5,
            end: 8
        }),
        frameRate: 10,
        repeat: -1
    });

    this.anims.create({
        key: &＃39;turn&＃39;,
        frames: [{
            key: &＃39;dude&＃39;,
            frame: 4
        }],
        frameRate: 20
    });

    cursors = this.input.keyboard.createCursorKeys();

5.写碰撞函数（当玩家与敌人碰撞的结果）

var gameOver = false; // 游戏结束
function hitBomb(player, enemys) {
    this.physics.pause();
    clearInterval(enemyTimer);
    clearInterval(distanceTimer);
    player.setTint(0xff0000);
    gameOver = true;
    alert(&＃39;游戏结束,您跑了&＃39; + distance + &＃39;m&＃39;);
}

6.在update函数中写时间的执行（须注意的是此函数每一帧都在执行，1帧≠1秒）

 function update() {
    if (cursors.up.isDown && player.body.touching.down) {
        player.setVelocityY(-220);
    } else {
        player.anims.play(&＃39;right&＃39;, true);
    }
    if (gameOver) {
        player.setVelocityX(0);
        player.anims.play(&＃39;turn&＃39;);
        return;
    }
}

这里我给敌人上了颜色的，随机16进制颜色

function getColor() {
    var color = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"].sort(function(){
        return Math.random() - 0.5
    }).join("").substr(0,6);
    
    return "0x" + color;
}

整个源码奉上（建议去github上自己clone）：

var cOnfig= {
    type: Phaser.AUTO,
    width: 800,
    height: 400,
    physics: {
        default: &＃39;arcade&＃39;,
        arcade: {
            gravity: {
                y: 300
            },
            debug: false
        }
    },
    scene: {
        preload: preload,
        create: create,
        update: update
    }
};

var game = new Phaser.Game(config); // 创建游戏

var distanceText; // 路程文本
var distance = 0; // 路程
var platforms; // 地面
var player; // 玩家
var enemy; // 敌人
var enemys; // 敌人们
var gameOver = false; // 游戏结束
var enemyTimer; // 敌人计时器
var distanceTimer; // 路程计时器

var cursors; // 按键 
// 载入资源
function preload() {
    this.load.image(&＃39;sky&＃39;, &＃39;assets/sky.png&＃39;);
    this.load.image(&＃39;ground&＃39;, &＃39;assets/platform.png&＃39;);
     39      40     this.load.spritesheet(&＃39;dude&＃39;, &＃39;assets/dude.png&＃39;, {
        frameWidth: 32,
        frameHeight: 48
    });
}

// 将资源展示到画布创建资源
function create() {
    // 添加画布背景
    this.add.image(400, 200, &＃39;sky&＃39;);
    // 添加分数文本
    distanceText = this.add.text(16, 16, &＃39;Distance: 0m&＃39;, {
        fontSize: &＃39;20px&＃39;,
        fill: &＃39;#000&＃39;
    });
    // 添加地面
    platforms = this.physics.add.staticGroup();
    platforms.create(400, 400, &＃39;ground&＃39;).setScale(3).refreshBody();
    // 添加玩家（精灵）
    player = this.physics.add.sprite(100, 300, &＃39;dude&＃39;);
    player.setBounce(0); // 设置阻力
    player.setCollideWorldBounds(true); // 禁止玩家走出世界

    // 敌人
    enemys = this.physics.add.group();
    enemys.children.iterate(function (child) {

        child.setCollideWorldBounds(false);
    });

    // 事件
    this.anims.create({
        key: &＃39;left&＃39;,
        frames: this.anims.generateFrameNumbers(&＃39;dude&＃39;, {
            start: 0,
            end: 3
        }),
        frameRate: 10,
        repeat: -1
    });

    this.anims.create({
        key: &＃39;right&＃39;,
        frames: this.anims.generateFrameNumbers(&＃39;dude&＃39;, {
            start: 5,
            end: 8
        }),
        frameRate: 10,
        repeat: -1
    });

    this.anims.create({
        key: &＃39;turn&＃39;,
        frames: [{
            key: &＃39;dude&＃39;,
            frame: 4
        }],
        frameRate: 20
    });

    cursors = this.input.keyboard.createCursorKeys();

    // 动态创建敌人
    enemyTimer = setInterval(function () {
        enemy = enemys.create(1000, 300, &＃39;dude&＃39;);
        enemy.setTint(getColor());
        enemy.anims.play(&＃39;left&＃39;, true);
        enemy.setVelocityX(Phaser.Math.Between(-300, -100));
    }, Phaser.Math.Between(4000, 8000))

    distanceTimer = setInterval(function () {
        distance += 1;
        distanceText.setText(&＃39;Distance: &＃39; + distance + &＃39;m&＃39;);
    }, 1000)



    this.physics.add.collider(player, platforms); //玩家在地面上
    this.physics.add.collider(enemys, platforms);
    this.physics.add.collider(player, enemys, hitBomb, null, this);

}
// 一直执行
function update() {
    if (cursors.up.isDown && player.body.touching.down) {
        player.setVelocityY(-220);
    } else {
        player.anims.play(&＃39;right&＃39;, true);
    }
    if (gameOver) {
        player.setVelocityX(0);
        player.anims.play(&＃39;turn&＃39;);
        return;
    }
}

function hitBomb(player, enemys) {
    this.physics.pause();
    clearInterval(enemyTimer);
    clearInterval(distanceTimer);
    player.setTint(0xff0000);
    gameOver = true;
    alert(&＃39;游戏结束,您跑了&＃39; + distance + &＃39;m&＃39;);
}

function getColor() {
    var color = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"].sort(function(){
        return Math.random() - 0.5
    }).join("").substr(0,6);
    
    return "0x" + color;
}

以上就是如何实现一个简单的跑酷游戏？（代码详解）的详细内容，更多请关注 第一PHP社区 其它相关文章！