组与组之间的处理

原文地址:http://www.phaser.io/examples/v2/arcade-physics/group-vs-group。

效果

源代码

window.onload = function () {
    var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser_container', { preload: preload, create: create, update: update });

    function preload() {

        game.load.image('phaser', 'images/phaser/phaser-dude.png');
        game.load.image('bullet', 'images/phaser/bullet0.png');
        game.load.spritesheet('veggies', 'images/phaser/fruitnveg32wh37.png', 32, 32);

    }

    var sprite;
    var bullets;
    var veggies;
    var cursors;

    var bulletTime = 0;
    var bullet;

    function create() {

        game.stage.backgroundColor = '#2d2d2d';

        //  检测组(子弹)与组(蔬菜)之间的碰撞 (bullets vs. veggies!)
        veggies = game.add.group();
        veggies.enableBody = true;
        veggies.physicsBodyType = Phaser.Physics.ARCADE;

        for (var i = 0; i < 50; i++) {
            var c = veggies.create(game.world.randomX, Math.random() * 500, 'veggies', game.rnd.integerInRange(0, 36));
            c.name = 'veg' + i;
            c.body.immovable = true;
        }

        bullets = game.add.group();
        bullets.enableBody = true;
        bullets.physicsBodyType = Phaser.Physics.ARCADE;

        for (var i = 0; i < 20; i++) {
            var b = bullets.create(0, 0, 'bullet');
            b.name = 'bullet' + i;
            b.exists = false;
            b.visible = false;
            b.checkWorldBounds = true;
            b.events.onOutOfBounds.add(resetBullet, this);
        }

        sprite = game.add.sprite(400, 550, 'phaser');
        game.physics.enable(sprite, Phaser.Physics.ARCADE);

        cursors = game.input.keyboard.createCursorKeys();
        game.input.keyboard.addKeyCapture([Phaser.Keyboard.SPACEBAR]);

    }

    function update() {

        //  本例只检测相交,而无需进行碰撞处理
        game.physics.arcade.overlap(bullets, veggies, collisionHandler, null, this);

        sprite.body.velocity.x = 0;
        sprite.body.velocity.y = 0;

        if (cursors.left.isDown) {
            sprite.body.velocity.x = -300;
        }
        else if (cursors.right.isDown) {
            sprite.body.velocity.x = 300;
        }

        // 按空格键发射子弹
        if (game.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR)) {
            fireBullet();
        }

    }

    function fireBullet() {

        if (game.time.now > bulletTime) {
            bullet = bullets.getFirstExists(false);

            if (bullet) {
                bullet.reset(sprite.x + 6, sprite.y - 8);
                bullet.body.velocity.y = -300;
                bulletTime = game.time.now + 150;
            }
        }

    }

    //  销毁飞出屏幕的子弹
    function resetBullet(bullet) {

        bullet.kill();

    }

    //  若子弹打中蔬菜,则销毁两者
    function collisionHandler(bullet, veg) {

        bullet.kill();
        veg.kill();

    }
}

发布时间:2016/11/19 21:46:46  阅读次数:4105

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