phaser/Tests/scrollzones/blasteroids.js

/// <reference path="../../Phaser/Game.ts" />
/// <reference path="../../Phaser/gameobjects/ScrollZone.ts" />
(function () {
    var myGame = new Phaser.Game(this, 'game', 800, 600, init, create, update);
    function init() {
        myGame.loader.addImageFile('nashwan', 'assets/sprites/xenon2_ship.png');
        myGame.loader.addImageFile('starfield', 'assets/misc/starfield.jpg');
        myGame.loader.addImageFile('jet', 'assets/sprites/particle1.png');
        myGame.loader.addImageFile('bullet', 'assets/misc/bullet1.png');
        myGame.loader.load();
    }
    var scroller;
    var emitter;
    var ship;
    var bullets;
    var speed = 0;
    var fireRate = 0;
    var shipMotion;
    function create() {
        scroller = myGame.createScrollZone('starfield', 0, 0, 1024, 1024);
        emitter = myGame.createEmitter(myGame.stage.centerX + 16, myGame.stage.centerY + 12);
        emitter.makeParticles('jet', 250, 0, false, 0);
        emitter.setRotation(0, 0);
        bullets = myGame.createGroup(50);
        //  Create our bullet pool
        for(var i = 0; i < 50; i++) {
            var tempBullet = new Phaser.Sprite(myGame, myGame.stage.centerX, myGame.stage.centerY, 'bullet');
            tempBullet.exists = false;
            tempBullet.rotationOffset = 90;
            tempBullet.setBounds(-100, -100, 900, 700);
            tempBullet.outOfBoundsAction = Phaser.GameObject.OUT_OF_BOUNDS_KILL;
            bullets.add(tempBullet);
        }
        ship = myGame.createSprite(myGame.stage.centerX, myGame.stage.centerY, 'nashwan');
        //  We do this because the ship was drawn facing up, but 0 degrees is pointing to the right
        ship.rotationOffset = 90;
    }
    function update() {
        ship.angularVelocity = 0;
        if(myGame.input.keyboard.isDown(Phaser.Keyboard.LEFT)) {
            ship.angularVelocity = -200;
        } else if(myGame.input.keyboard.isDown(Phaser.Keyboard.RIGHT)) {
            ship.angularVelocity = 200;
        }
        if(myGame.input.keyboard.isDown(Phaser.Keyboard.UP)) {
            speed += 0.1;
            if(speed > 10) {
                speed = 10;
            }
        } else {
            speed -= 0.1;
            if(speed < 0) {
                speed = 0;
            }
        }
        shipMotion = myGame.motion.velocityFromAngle(ship.angle, speed);
        scroller.setSpeed(shipMotion.x, shipMotion.y);
        //  emit particles
        if(speed > 2) {
            //  We use the opposite of the motion because the jets emit out the back of the ship
            //  The 20 and 30 values just keep them nice and fast
            emitter.setXSpeed(-(shipMotion.x * 20), -(shipMotion.x * 30));
            emitter.setYSpeed(-(shipMotion.y * 20), -(shipMotion.y * 30));
            emitter.emitParticle();
        }
        if(myGame.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR)) {
            fire();
        }
    }
    function recycleBullet(bullet) {
        if(bullet.exists && bullet.x < -40 || bullet.x > 840 || bullet.y < -40 || bullet.y > 640) {
            bullet.exists = false;
        }
    }
    function fire() {
        if(myGame.time.now > fireRate) {
            var b = bullets.getFirstAvailable();
            b.x = ship.x;
            b.y = ship.y - 26;
            var bulletMotion = myGame.motion.velocityFromAngle(ship.angle, 400);
            b.revive();
            b.angle = ship.angle;
            b.velocity.setTo(bulletMotion.x, bulletMotion.y);
            fireRate = myGame.time.now + 100;
        }
    }
})();