danbarber/invaders
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Code Issues Releases Wiki Activity

Add bombs!

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This commit is contained in:
Dan Barber 2014-05-10 12:13:28 +01:00
parent c763d1427b
commit 70c415857c
1 changed files with 50 additions and 10 deletions
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60
javascripts/game.js
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@ -1,10 +1,10 @@
var game = new Phaser.Game(1024, 576, Phaser.AUTO, 'game', { preload: preload, create: create, update: update }); var game = new Phaser.Game(1024, 576, Phaser.AUTO, 'game', { preload: preload, create: create, update: update });
function preload () { function preload () {
game.load.image('ship', '/images/ship.png'); game.load.image('ship', 'images/ship.png');
game.load.image('bullet', '/images/bullet.png'); game.load.image('bullet', 'images/bullet.png');
game.load.image('alien', '/images/alien.png'); game.load.image('alien', 'images/alien.png');
game.load.image('bomb', '/images/bomb.png'); game.load.image('bomb', 'images/bomb.png');
} }
var bulletTime = 0; var bulletTime = 0;
@ -37,6 +37,16 @@ function create () {
createAliens(); createAliens();
// Initialize bombs
bombs = game.add.group();
bombs.enableBody = true;
bombs.physicsBodyType = Phaser.Physics.ARCADE;
bombs.createMultiple(10, 'bomb');
bombs.setAll('anchor.x', 0.5);
bombs.setAll('anchor.y', 0.5);
bombs.setAll('checkWorldBounds', true);
bombs.setAll('outOfBoundsKill', true);
// Setup controls // Setup controls
cursors = game.input.keyboard.createCursorKeys(); cursors = game.input.keyboard.createCursorKeys();
fireButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR); fireButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
@ -45,12 +55,16 @@ function create () {
function update () { function update () {
playerMovement(); playerMovement();
// Firing? // Firing?
if (fireButton.isDown) { if (fireButton.isDown && player.alive) {
fireBullet(); fireBullet();
} }
// Handle aliens dropping bombs
handleBombs();
game.physics.arcade.overlap(bullets, aliens, bulletHitsAlien, null, this); game.physics.arcade.overlap(bullets, aliens, bulletHitsAlien, null, this);
game.physics.arcade.overlap(bombs, player, bombHitsPlayer, null, this);
} }
function playerMovement () { function playerMovement () {
@ -80,7 +94,7 @@ function fireBullet () {
bullet = bullets.getFirstExists(false); bullet = bullets.getFirstExists(false);
if (bullet) { if (bullet) {
// And fire it // And fire it
bullet.reset(player.x, player.y - 16); bullet.reset(player.x, player.y - 16);
bullet.body.velocity.y = -400; bullet.body.velocity.y = -400;
bullet.body.velocity.x = player.body.velocity.x / 4 bullet.body.velocity.x = player.body.velocity.x / 4
@ -94,6 +108,11 @@ function bulletHitsAlien (bullet, alien) {
alien.kill(); alien.kill();
} }
function bombHitsPlayer (bomb, player) {
bomb.kill();
player.kill();
}
function createAliens () { function createAliens () {
for (var y = 0; y < 4; y++) { for (var y = 0; y < 4; y++) {
for (var x = 0; x < 10; x++) { for (var x = 0; x < 10; x++) {
@ -106,11 +125,32 @@ function createAliens () {
aliens.x = 64; aliens.x = 64;
aliens.y = 50; aliens.y = 50;
// All this does is basically start the invaders moving. Notice we're moving the Group they belong to, rather than the invaders directly. // All this does is basically start the invaders moving. Notice we're moving the Group they belong to, rather than the invaders directly.
var tween = game.add.tween(aliens).to( { x: 284 }, 2500, Phaser.Easing.Sinusoidal.InOut, true, 0, 1000, true); var tween = game.add.tween(aliens).to( { x: 284 }, 2500, Phaser.Easing.Sinusoidal.InOut, true, 0, 1000, true);
// When the tween loops it calls descend // When the tween loops it calls descend
tween.onLoop.add(descend, this); tween.onLoop.add(descend, this);
} }
function descend () { aliens.y += 10; } function handleBombs () {
aliens.forEachAlive(function (alien) {
chanceOfDroppingBomb = game.rnd.integerInRange(0, 1000);
if (chanceOfDroppingBomb == 0) {
dropBomb(alien);
}
}, this)
}
function dropBomb (alien) {
bomb = bombs.getFirstExists(false);
if (bomb) {
// And drop it
bomb.reset(alien.x + aliens.x, alien.y + aliens.y + 16);
bomb.body.velocity.y = +100;
bomb.body.gravity.y = 250
}
}
function descend () { aliens.y += 8; }