Emanuele Feronato

let game;
let gameOptions = {
    platformWidth: 300,
    platformVerticalPositions: 5,
    platformVerticalGap: 50,
    platformSpeed: 150,
    playerSize: 50
}
window.onload = function() {
    let gameConfig = {
        type: Phaser.AUTO,
        backgroundColor:0x67aeeb,
        scale: {
            mode: Phaser.Scale.FIT,
            autoCenter: Phaser.Scale.CENTER_BOTH,
            parent: "thegame",
            width: 750,
            height: 500
        },
        physics: {
            default: "arcade"
        },
        scene: playGame
    }
    game = new Phaser.Game(gameConfig);
    window.focus();
}
class playGame extends Phaser.Scene{
    constructor(){
        super("PlayGame");
    }
    preload(){
        this.load.image("tile", "tile.png");
    }
    create(){
        this.platformGroup = this.physics.add.group();
        this.platformArray = [];
        this.leftmostPlatform = 0;
        this.moveablePlatform = 1;
        this.collidingPlatform = 2;
        let platformsInGame = Math.ceil(game.config.width / gameOptions.platformWidth) * 2;
        for(let i = 0; i < platformsInGame; i ++){
            let posX = gameOptions.platformWidth * i;
            let platformTopY = game.config.height / 2 - (gameOptions.platformVerticalPositions * gameOptions.platformVerticalGap) / 2;
            let posY = platformTopY + Phaser.Math.Between(0, gameOptions.platformVerticalPositions) * gameOptions.platformVerticalGap;
            let platform = this.platformGroup.create(posX, posY, "tile");
            platform.setOrigin(0, 0);
            platform.displayWidth = gameOptions.platformWidth;
            platform.displayHeight = game.config.height;
            if(i == 1){
                platform.alpha = 0.5;
                platform.y = this.platformArray[0].y
            }
            this.platformArray.push(platform);
        }
        this.platformGroup.setVelocityX(-gameOptions.platformSpeed);
        this.player = this.add.sprite(this.platformArray[this.leftmostPlatform].getBounds().right + gameOptions.playerSize, this.platformArray[this.leftmostPlatform].getBounds().top, "tile");
        this.player.setOrigin(1, 1);
        this.player.displayWidth = gameOptions.playerSize;
        this.player.displayHeight = gameOptions.playerSize;
        this.input.on("pointerup", this.endSwipe, this);
    }
    endSwipe(e) {
        let swipeTime = e.upTime - e.downTime;
        let swipe = new Phaser.Geom.Point(e.upX - e.downX, e.upY - e.downY);
        let swipeMagnitude = Phaser.Geom.Point.GetMagnitude(swipe);
        let swipeNormal = new Phaser.Geom.Point(swipe.x / swipeMagnitude, swipe.y / swipeMagnitude);
        if(swipeMagnitude > 20 && swipeTime < 1000 && (Math.abs(swipeNormal.y) > 0.8 || Math.abs(swipeNormal.x) > 0.8)) {
            if(swipeNormal.y > 0.8) {
                this.platformArray[this.moveablePlatform].y += gameOptions.platformVerticalGap;
                this.player.y += gameOptions.platformVerticalGap;
            }
            if(swipeNormal.y < -0.8) {
                this.platformArray[this.moveablePlatform].y -= gameOptions.platformVerticalGap;
                this.player.y -= gameOptions.platformVerticalGap;
            }
        }
    }
    update(){
        if(this.platformArray[this.leftmostPlatform].getBounds().right < 0){
            let rightmostPlatform = Phaser.Math.Wrap(this.leftmostPlatform - 1, 0, this.platformArray.length);
            let platformTopY = game.config.height / 2 - (gameOptions.platformVerticalPositions * gameOptions.platformVerticalGap) / 2;
            let posY = platformTopY + Phaser.Math.Between(0, gameOptions.platformVerticalPositions) * gameOptions.platformVerticalGap;
            this.platformArray[this.leftmostPlatform].y = posY;
            this.platformArray[this.leftmostPlatform].x = this.platformArray[rightmostPlatform].getBounds().right;
            this.platformArray[this.moveablePlatform].alpha = 1;
            this.leftmostPlatform = Phaser.Math.Wrap(this.leftmostPlatform + 1, 0, this.platformArray.length);
            this.moveablePlatform = Phaser.Math.Wrap(this.leftmostPlatform + 1, 0, this.platformArray.length);
            this.collidingPlatform = Phaser.Math.Wrap(this.moveablePlatform + 1, 0, this.platformArray.length);
            this.platformArray[this.moveablePlatform].alpha = 0.5;
        }
        if(this.platformArray[this.collidingPlatform].getBounds().left < this.player.getBounds().right){
            if(this.platformArray[this.collidingPlatform].y != this.platformArray[this.moveablePlatform].y){
                this.scene.start("PlayGame");
            }
        }
    }
}