phaser/Tests/sprites/dynamic texture 1.js

/// <reference path="../../Phaser/Game.ts" />
(function () {
    var myGame = new Phaser.Game(this, 'game', 800, 600, init, create, update);
    function init() {
        myGame.loader.addImageFile('ball', 'assets/sprites/shinyball.png');
        myGame.loader.load();
    }
    var wobblyBall;
    function create() {
        //  Create our DynamicTexture
        wobblyBall = myGame.createDynamicTexture(32, 64);
        //  And apply it to 100 randomly positioned sprites
        for(var i = 0; i < 100; i++) {
            var temp = myGame.createSprite(myGame.world.randomX, myGame.world.randomY);
            temp.width = 32;
            temp.height = 64;
            temp.loadDynamicTexture(wobblyBall);
        }
        //  Populate the wave with some data
        waveData = myGame.math.sinCosGenerator(32, 8, 8, 2);
    }
    function update() {
        wobblyBall.clear();
        updateWobblyBall();
    }
    //  This creates a simple sine-wave effect running through our DynamicTexture.
    //  This is then duplicated across all sprites using it, meaning we only have to calculate it once.
    var waveSize = 8;
    var wavePixelChunk = 2;
    var waveData;
    var waveDataCounter;
    function updateWobblyBall() {
        var s = 0;
        var copyRect = {
            x: 0,
            y: 0,
            w: wavePixelChunk,
            h: 32
        };
        var copyPoint = {
            x: 0,
            y: 0
        };
        for(var x = 0; x < 32; x += wavePixelChunk) {
            copyPoint.x = x;
            copyPoint.y = waveSize + (waveSize / 2) + waveData[s];
            wobblyBall.context.drawImage(myGame.cache.getImage('ball'), copyRect.x, copyRect.y, copyRect.w, copyRect.h, copyPoint.x, copyPoint.y, copyRect.w, copyRect.h);
            copyRect.x += wavePixelChunk;
            s++;
        }
        //	Cycle through the wave data - this is what causes the image to "undulate"
        var t = waveData.shift();
        waveData.push(t);
        waveDataCounter++;
        if(waveDataCounter == waveData.length) {
            waveDataCounter = 0;
        }
    }
})();