phaser/Tests/groups/get first 2.js

/// <reference path="../../Phaser/Game.ts" />
(function () {
    var game = new Phaser.Game(this, 'game', 800, 600, init, create, update, render);

    var timer, cycle;

    function init() {
        game.load.spritesheet('item', 'assets/buttons/number-buttons-90x90.png', 90, 90);
        game.load.image('reviveBtn', 'assets/buttons/revive-button.png');
        game.load.start();
    }
    function create() {
        // Add some items.
        var item;
        for (var i = 0; i < 3; i++) {
            // Give the items a different alpha increase speed.
            item = game.add.sprite(290, 98 * (i + 1), 'item', i);
            // An item besides the left one.
            item = game.add.sprite(388, 98 * (i + 1), 'item', i + 3);
        }

        // Set a timer so we can perform an action after a delay.
        timer = 0;
        cycle = 1000;
    }
    function update() {
        // Update timer.
        timer += game.time.delta;
        if (timer > cycle) {
            timer -= cycle;
            // Get an alive item from the group randomly, so it may not
            // be the first to be killed.
            // Also you can specific a range, only items between that range
            // will be found and return.
            // Set a range of (0, 5), so the first item will not be kill at all.
            var item = game.world.group.getRandom(1, 5);
            if (item) {
                item.kill();
            }
        }
    }
    function render() {
        Phaser.DebugUtils.context.fillStyle = '#fff';
        Phaser.DebugUtils.context.fillText('One item will be killed each second.', 280, 420);
        Phaser.DebugUtils.context.fillText('Yet the first one will NEVER be killed since we use a range from 1 to 5 for selection.', 140, 432);
        // Get living and dead number of a group.
        Phaser.DebugUtils.context.fillText('Living: ' + game.world.group.countLiving() + ', Dead: ' + game.world.group.countDead(), 330, 460);
    }
})();