mirror of
https://github.com/photonstorm/phaser
synced 2024-12-04 02:20:23 +00:00
109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
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var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });
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var ufo;
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var leftBtn;
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var rightBtn;
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var speed = 4;
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function preload() {
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game.world.setBounds(0, 0, 1280, 600);
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game.load.image('ground', 'assets/tests/ground-2x.png');
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game.load.image('river', 'assets/tests/river-2x.png');
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game.load.image('sky', 'assets/tests/sky-2x.png');
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game.load.image('cloud0', 'assets/tests/cloud-big-2x.png');
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game.load.image('cloud1', 'assets/tests/cloud-narrow-2x.png');
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game.load.image('cloud2', 'assets/tests/cloud-small-2x.png');
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game.load.spritesheet('button', 'assets/buttons/arrow-button.png', 112, 95);
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game.load.image('spacebar', 'assets/buttons/spacebar.png');
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game.load.image('ufo', 'assets/sprites/ufo.png');
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}
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function create() {
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// background images
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game.add.sprite(0, 0, 'sky');
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game.add.sprite(0, 360, 'ground');
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game.add.sprite(0, 400, 'river');
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game.add.sprite(200, 120, 'cloud0');
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game.add.sprite(-60, 120, 'cloud1');
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game.add.sprite(900, 170, 'cloud2');
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// Create a ufo sprite as a player.
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ufo = game.add.sprite(320, 240, 'ufo');
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ufo.anchor.setTo(0.5, 0.5);
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// Make the camera follow the ufo.
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game.camera.follow(ufo);
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// Add 2 sprite to display hold direction.
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leftBtn = game.add.sprite(160 - 112, 200, 'button', 0);
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leftBtn.alpha = 0;
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rightBtn = game.add.sprite(640 - 112, 200, 'button', 1);
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rightBtn.alpha = 0;
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// Add a sprite to display spacebar press.
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spaceBtn = game.add.sprite(400 - 112, 100, 'spacebar');
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spaceBtn.alpha = 0;
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// Prevent directions and space key events bubbling up to browser,
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// since these keys will make web page scroll which is not
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// expected.
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game.input.keyboard.addKeyCapture([
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Phaser.Keyboard.LEFT,
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Phaser.Keyboard.RIGHT,
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Phaser.Keyboard.UP,
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Phaser.Keyboard.DOWN,
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Phaser.Keyboard.SPACEBAR
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]);
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}
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function update() {
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// Check key states every frame.
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// Move ONLY one of the left and right key is hold.
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if (game.input.keyboard.isDown(Phaser.Keyboard.LEFT))
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{
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ufo.x -= speed;
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ufo.angle = -15;
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leftBtn.alpha = 0.6;
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}
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else if (game.input.keyboard.isDown(Phaser.Keyboard.RIGHT))
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{
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ufo.x += speed;
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ufo.angle = 15;
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rightBtn.alpha = 0.6;
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}
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else
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{
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ufo.rotation = 0;
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leftBtn.alpha = rightBtn.alpha = 0;
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}
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// 50 as a second parameter is a good choice if you are running 60FPS.
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if (game.input.keyboard.justPressed(Phaser.Keyboard.SPACEBAR, 50))
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{
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console.log('space bar pressed');
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spaceBtn.alpha = 1;
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}
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if (spaceBtn.alpha > 0)
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{
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spaceBtn.alpha -= 0.03;
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}
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}
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function render() {
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game.debug.renderText('Hold left/right to move the ufo.', 16, 32);
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game.debug.renderText('Direction and Space key events are stopped by Phaser now,', 16, 48);
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game.debug.renderText('so they will no longer be sent to the browser', 16, 64);
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game.debug.renderText('Now you can press UP/DOWN or SPACE to see what happened.', 16, 80);
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}
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