-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindex.html
845 lines (726 loc) · 32 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
<!DOCTYPE html>
<html>
<head>
<meta name="Space Blitz" content="A 2D-scroller game built with Phaser.io for Fullstack Academy's Stackathon project" />
<meta charset="utf-8">
<title>SPACE BLITZ</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/phaser/2.0.5/phaser.min.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
window.onload = function() {
var game = new Phaser.Game(950, 625, Phaser.AUTO, '', {
preload: preload,
create: create,
update: update
});
var player,
starfield,
cursors,
angle,
emitter,
bullets,
fireButton,
greenEnemies,
blueEnemies,
explosions,
shields,
enemyBullets,
greenEnemyLaunchTimer,
blueEnemyLaunchTimer,
playerDeath,
greenEnemySpacing = 1000,
blueEnemyLaunched = false,
blueEnemySpacing = 2500,
bossLaunchTimer,
bossLaunched = false,
bossSpacing = 20000,
bossBulletTimer = 0,
bossYDirection = -1,
gameOver,
bulletUpgrade,
score = 0,
scoreText,
music,
bulletTimer = 0;
// constants
const ACCELERATION = 700
const DRAG = 400
const MAXSPEED = 500
function preload() {
game.load.audio('boden', ['bodenstaendig_2000_in_rock_4bit.mp3', 'bodenstaendig_2000_in_rock_4bit.ogg']);
game.load.image('starfield', 'space2.jpg');
game.load.image('fire1', 'fire1.png');
game.load.image('fire2', 'fire2.png');
game.load.image('fire3', 'fire3.png');
game.load.image('smoke', 'smoke-puff.png');
game.load.image('player', 'player.png');
game.load.image('bullet', 'bullet.png');
game.load.image('enemy-green', 'enemy-green.png');
game.load.image('enemy-blue', 'enemy-blue.png');
game.load.image('blueEnemyBullet', 'enemy-blue-bullet.png');
game.load.spritesheet('explosion', 'explode.png', 128, 128);
game.load.bitmapFont('spacefont', 'spacefont.png', 'spacefont.xml');
game.load.image('boss', 'boss.png');
game.load.image('deathRay', 'death-ray.png');
game.load.image('logo', 'phaser.png');
}
function create() {
// create music
game.input.touch.preventDefault = false;
music = game.add.audio('boden');
music.play();
game.input.onDown.add(changeVolume, this);
// create 'start' screen
var startLogo = game.add.tileSprite(game.world.centerX, game.world.centerY, 'logo');
startLogo.anchor.setTo(0.5, 0.5);
startLogo.alpha = 0;
game.add.tween(startLogo).to({
alpha: 1
}, 2000, Phaser.Easing.Linear.None, true, 0, 1000, true);
// create background
starfield = game.add.tileSprite(0, 0, game.width, game.height, 'starfield');
// create bullets
bullets = game.add.group();
bullets.enableBody = true;
bullets.physicsBodyType = Phaser.Physics.ARCADE;
bullets.createMultiple(30, 'bullet');
bullets.setAll('anchor.x', 0.5);
bullets.setAll('anchor.y', 1);
bullets.setAll('outOfBoundsKill', true);
bullets.setAll('checkWorldBounds', true);
// create player
player = game.add.sprite(450, 525, 'player');
player.health = 200;
player.anchor.setTo(0.5, 0.5);
player.width = 70;
player.height = 80;
// init player physics
game.physics.enable(player, Phaser.Physics.ARCADE);
player.body.maxVelocity.setTo(MAXSPEED, MAXSPEED);
player.body.drag.setTo(DRAG, DRAG);
player.weaponLevel = 1;
player.events.onKilled.add(function() {
emitter.kill();
});
player.events.onRevived.add(function() {
emitter.start(false, 3000, 5);
});
// init game controls
cursors = game.input.keyboard.createCursorKeys();
fireButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
// create fire
emitter = game.add.emitter(game.world.centerX, game.world.centerY, 400);
emitter.makeParticles(['fire1', 'fire2', 'fire3', 'smoke']);
emitter.gravity = 200;
emitter.setAlpha(1, 0, 300);
emitter.setScale(0.8, 0, 0.8, 0, 3000);
emitter.start(false, 3000, 5);
player.animations.add('pulse');
player.play('pulse', 30, true);
// create green enemies
greenEnemies = game.add.group();
greenEnemies.enableBody = true;
greenEnemies.physicsBodyType = Phaser.Physics.ARCADE;
greenEnemies.createMultiple(20, 'enemy-green');
greenEnemies.setAll('anchor.x', 0.5);
greenEnemies.setAll('anchor.y', 0.5);
greenEnemies.setAll('scale.x', 0.6);
greenEnemies.setAll('scale.y', 0.6);
greenEnemies.setAll('angle', 180);
greenEnemies.forEach(function(enemy) {
addEnemyEmitterTrail(enemy);
enemy.body.setSize(enemy.width * 3 / 4, enemy.height * 3 / 4);
enemy.damageAmount = 20;
enemy.events.onKilled.add(function() {
enemy.trail.kill();
});
});
game.time.events.add(1000, launchGreenEnemy);
// create blue enemies
blueEnemies = game.add.group();
blueEnemies.enableBody = true;
blueEnemies.physicsBodyType = Phaser.Physics.ARCADE;
blueEnemies.createMultiple(30, 'enemy-blue');
blueEnemies.setAll('anchor.x', 0.5);
blueEnemies.setAll('anchor.y', 0.5);
blueEnemies.setAll('scale.x', 0.5);
blueEnemies.setAll('scale.y', 0.5);
blueEnemies.setAll('angle', 180);
// blueEnemies.width = 40;
// blueEnemies.height = 50;
blueEnemies.forEach(function(enemy) {
enemy.damageAmount = 40;
});
// create blue enemies bullets
blueEnemyBullets = game.add.group();
blueEnemyBullets.enableBody = true;
blueEnemyBullets.physicsBodyType = Phaser.Physics.ARCADE;
blueEnemyBullets.createMultiple(30, 'blueEnemyBullet');
blueEnemyBullets.callAll('crop', null, {
x: 90,
y: 0,
width: 90,
height: 70
});
blueEnemyBullets.setAll('alpha', 0.9);
blueEnemyBullets.setAll('anchor.x', 0.5);
blueEnemyBullets.setAll('anchor.y', 0.5);
blueEnemyBullets.setAll('outOfBoundsKill', true);
blueEnemyBullets.setAll('checkWorldBounds', true);
blueEnemyBullets.forEach(function(enemy) {
enemy.body.setSize(20, 20);
});
// create "The Boss"
boss = game.add.sprite(0, 0, 'boss');
boss.exists = false;
boss.alive = false;
boss.anchor.setTo(0.5, 0.5);
boss.damageAmount = 50;
boss.angle = 180;
boss.scale.x = 0.7;
boss.scale.y = 0.7;
game.physics.enable(boss, Phaser.Physics.ARCADE);
boss.body.maxVelocity.setTo(100, 80);
boss.dying = false;
boss.finishOff = function() {
if (!boss.dying) {
boss.dying = true;
bossDeath.x = boss.x;
bossDeath.y = boss.y;
bossDeath.start(false, 1000, 50, 20);
}
// kill boss after explosions
game.time.events.add(1000, function() {
var explosion = explosions.getFirstExists(false);
var beforeScaleX = explosions.scale.x;
var beforeScaleY = explosions.scale.y;
var beforeAlpha = explosions.alpha;
explosion.reset(boss.body.x + boss.body.halfWidth, boss.body.y + boss.body.halfHeight);
explosion.alpha = 0.4;
explosion.scale.x = 3;
explosion.scale.y = 3;
var animation = explosion.play('explosion', 30, true, true);
animation.onComplete.addOnce(function() {
explosion.scale.x = beforeScaleX;
explosion.scale.y = beforeScaleY;
explosion.alpha = beforeAlpha;
});
boss.kill();
booster.kill();
bossDeath.on = false;
// prepare next boss
bossLaunchTimer = game.time.events.add(game.rnd.integerInRange(bossSpacing, bossSpacing + 5000), launchBoss);
});
// reset timing for green/blue enemies
blueEnemySpacing = 2500;
greenEnemySpacing = 1000;
// add bonus health
player.health = Math.min(100, player.health + 40);
shields.render();
}
// Boss death ray
function addRay(leftRight) {
var ray = game.add.sprite(leftRight * boss.width * 0.75, 0, 'deathRay');
ray.alive = false;
ray.visible = false;
boss.addChild(ray);
ray.crop({
x: 0,
y: 0,
width: 40,
height: 40
});
ray.anchor.x = 0.5;
ray.anchor.y = 0.5;
ray.scale.x = 2.5;
ray.damageAmount = boss.damageAmount;
game.physics.enable(ray, Phaser.Physics.ARCADE);
ray.body.setSize(ray.width / 5, ray.height / 4);
ray.update = function() {
this.alpha = game.rnd.realInRange(0.6, 1);
};
boss['ray' + (leftRight > 0 ? 'Right' : 'Left')] = ray;
}
addRay(1);
addRay(-1);
// need to add the ship texture to the group so it renders over the rays
var ship = game.add.sprite(0, 0, 'boss');
ship.anchor = {
x: 0.5,
y: 0.5
};
boss.addChild(ship);
boss.fire = function() {
if (game.time.now > bossBulletTimer) {
var raySpacing = 3000;
var chargeTime = 1500;
var rayTime = 1500;
function chargeAndShoot(side) {
ray = boss['ray' + side];
ray.name = side
ray.revive();
ray.y = 80;
ray.alpha = 0;
ray.scale.y = 13;
game.add.tween(ray).to({
alpha: 1
}, chargeTime, Phaser.Easing.Linear.In, true).onComplete.add(function(ray) {
ray.scale.y = 150;
game.add.tween(ray).to({
y: -1500
}, rayTime, Phaser.Easing.Linear.In, true).onComplete.add(function(ray) {
ray.kill();
});
});
}
chargeAndShoot('Right');
chargeAndShoot('Left');
bossBulletTimer = game.time.now + raySpacing;
}
};
boss.update = function() {
if (!boss.alive) return;
boss.rayLeft.update();
boss.rayRight.update();
if (boss.y > 140) {
boss.body.acceleration.y = -50;
}
if (boss.y < 140) {
boss.body.acceleration.y = 50;
}
if (boss.x > player.x + 50) {
boss.body.acceleration.x = -50;
} else if (boss.x < player.x - 50) {
boss.body.acceleration.x = 50;
} else {
boss.body.acceleration.x = 0;
}
// Squish and rotate boss for illusion of "banking"
var bank = boss.body.velocity.x / MAXSPEED;
boss.scale.x = 0.6 - Math.abs(bank) / 3;
boss.angle = 180 - bank * 20;
booster.x = boss.x + -5 * bank;
booster.y = boss.y + 10 * Math.abs(bank) - boss.height / 2;
// fire if player is in target
var angleToPlayer = game.math.radToDeg(game.physics.arcade.angleBetween(boss, player)) - 90;
var anglePointing = 180 - Math.abs(boss.angle);
if (anglePointing - angleToPlayer < 18) {
boss.fire();
}
}
// boss's boosters
booster = game.add.emitter(boss.body.x, boss.body.y - boss.height / 2);
booster.width = 0;
booster.makeParticles('blueEnemyBullet');
booster.forEach(function(p) {
p.crop({
x: 120,
y: 0,
width: 45,
height: 50
});
// clever way of making 2 exhaust trails by shifing particles randomly left or right
p.anchor.x = game.rnd.pick([1, -1]) * 0.95 + 0.5;
p.anchor.y = 0.75;
});
booster.setXSpeed(0, 0);
booster.setRotation(0, 0);
booster.setYSpeed(-30, -50);
booster.gravity = 0;
booster.setAlpha(1, 0.1, 400);
booster.setScale(0.3, 0, 0.7, 0, 5000, Phaser.Easing.Quadratic.Out);
boss.bringToTop();
// create explosion pool
explosions = game.add.group();
explosions.enableBody = true;
explosions.physicsBodyType = Phaser.Physics.ARCADE;
explosions.createMultiple(30, 'explosion');
explosions.setAll('anchor.x', 0.5);
explosions.setAll('anchor.y', 0.5);
explosions.forEach(function(explosion) {
explosion.animations.add('explosion');
});
// accentuate player death explosion
playerDeath = game.add.emitter(player.x, player.y);
playerDeath.width = 50;
playerDeath.height = 50;
playerDeath.makeParticles('explosion', [0, 1, 2, 3, 4, 5, 6, 7], 10);
playerDeath.setAlpha(0.9, 0, 800);
playerDeath.setScale(0.1, 0.6, 0.1, 0.6, 1000, Phaser.Easing.Quintic.Out);
// Big explosion for boss
bossDeath = game.add.emitter(boss.x, boss.y);
bossDeath.width = boss.width / 2;
bossDeath.height = boss.height / 2;
bossDeath.makeParticles('explosion', [0, 1, 2, 3, 4, 5, 6, 7], 20);
bossDeath.setAlpha(0.9, 0, 900);
bossDeath.setScale(0.3, 1.0, 0.3, 1.0, 1000, Phaser.Easing.Quintic.Out);
// shields stats
shields = game.add.bitmapText(game.world.width - 260, 10, 'spacefont', '' + player.health + '%', 50);
shields.render = function() {
shields.text = 'Shields: ' + Math.max(player.health, 0) + '%';
};
shields.render();
// score
scoreText = game.add.bitmapText(10, 10, 'spacefont', '', 50);
scoreText.render = function() {
scoreText.text = 'Score: ' + score;
};
scoreText.render();
if (score > 1000 && player.weaponLevel < 2) {
player.weaponLevel = 2;
bulletUpgrade.visible = true;
}
// game over text
gameOver = game.add.bitmapText(game.world.centerX, game.world.centerY, 'spacefont', 'GAME OVER!', 110);
gameOver.x = gameOver.x - gameOver.textWidth / 2;
gameOver.y = gameOver.y - gameOver.textHeight / 3;
gameOver.visible = false;
}
function update() {
// background scrolling
starfield.tilePosition.y += 2;
// reset player, check for movement keys
player.body.acceleration.x = 0;
// fire bullets
if (player.alive && (fireButton.isDown || game.input.activePointer.isDown)) {
fireBullet();
}
// create ship angle illusion
angle = player.body.velocity.x / MAXSPEED;
player.angle = angle * 30;
// avoid flying off screen edges!
if (player.x > game.width - 50) {
player.x = game.width - 50;
player.body.acceleration.x = 0;
}
if (player.x < 50) {
player.x = 50;
player.body.acceleration.x = 0;
}
if (player.y > game.height - 50) {
player.y = game.height - 50;
player.body.acceleration.y = 0;
}
if (player.y < 50) {
player.y = 50;
player.body.acceleration.y = 0;
}
// player speed
if (cursors.left.isDown) {
player.body.acceleration.x = -ACCELERATION;
} else if (cursors.right.isDown) {
player.body.acceleration.x = ACCELERATION;
} else if (cursors.up.isDown) {
player.body.acceleration.y = -50;
} else if (cursors.down.isDown) {
player.body.acceleration.y = 400;
}
// add fire and smoke particles to ship engine
var px = player.body.velocity.x;
var py = player.body.velocity.y;
px *= -1;
py *= -1;
emitter.minParticleSpeed.set(px, py);
emitter.maxParticleSpeed.set(px, py);
emitter.emitX = player.x;
emitter.emitY = player.y + 80;
game.world.wrap(player, 64);
// check for collisions
game.physics.arcade.overlap(player, greenEnemies, shipCollide, null, this);
game.physics.arcade.overlap(greenEnemies, bullets, hitEnemy, null, this);
game.physics.arcade.overlap(player, blueEnemies, shipCollide, null, this);
game.physics.arcade.overlap(blueEnemies, bullets, hitEnemy, null, this);
game.physics.arcade.overlap(blueEnemyBullets, player, enemyHitsPlayer, null, this);
game.physics.arcade.overlap(boss, bullets, hitEnemy, bossHitTest, this);
game.physics.arcade.overlap(player, boss.rayLeft, enemyHitsPlayer, null, this);
game.physics.arcade.overlap(player, boss.rayRight, enemyHitsPlayer, null, this);
// Game over
if (!player.alive && gameOver.visible === false) {
gameOver.visible = true;
gameOver.alpha = 0;
var fadeInGameOver = game.add.tween(gameOver);
fadeInGameOver.to({
alpha: 1
}, 1000, Phaser.Easing.Quintic.Out);
fadeInGameOver.onComplete.add(setResetHandlers);
fadeInGameOver.start();
// 'click to restart' handler
function setResetHandlers() {
tapRestart = game.input.onTap.addOnce(_restart, this);
spaceRestart = fireButton.onDown.addOnce(_restart, this);
function _restart() {
tapRestart.detach();
spaceRestart.detach();
restart();
}
}
}
// bullet upgrade
if (player.alive && player.weaponLevel === 2 && bulletUpgrade.visible === false) {
bulletUpgrade.visible = true;
bulletUpgrade.alpha = 0;
bulletUpgrade = game.add.bitmapText(game.world.centerX, game.world.centerY, 'spacefont', 'Bullet Upgrade!', 110);
bulletUpgrade.x = bulletUpgrade.x - bulletUpgrade.textWidth / 2;
bulletUpgrade.y = bulletUpgrade.y - bulletUpgrade.textHeight / 3;
var fadeInBulletUpgrade = game.add.tween(bulletUpgrade);
fadeInBulletUpgrade.to({
alpha: 1
}, 1000, Phaser.Easing.Quintic.Out);
//fadeInBulletUpgrade.onComplete.add(setResetHandlers);
fadeInBulletUpgrade.start();
}
}
// UTILITY FUNCTIONS
// for debugging
function render() {
for (var i = 0; i < greenEnemies.length; i++) {
game.debug.body(greenEnemies.children[i]);
}
game.debug.body(player);
}
function fireBullet() {
switch (player.weaponLevel) {
case 1:
// time limit to avoid bullet being fired too fast
if (game.time.now > bulletTimer) {
var bullet_speed = 400;
var bullet_spacing = 100;
var bullet = bullets.getFirstExists(false);
if (bullet) {
var bulletOffset = 20 * Math.sin(game.math.degToRad(player.angle));
bullet.reset(player.x + bulletOffset, player.y);
bullet.angle = player.angle;
game.physics.arcade.velocityFromAngle(bullet.angle - 90, bullet_speed, bullet.body.velocity);
bullet.body.velocity.x += player.body.velocity.x;
bulletTimer = game.time.now + bullet_spacing;
}
}
break;
case 2:
if (game.time.now > bulletTimer) {
var bullet_speed = 400;
var bullet_spacing = 50;
for (var i = 0; i < 3; i++) {
var bullet = bullets.getFirstExists(false);
if (bullet) {
// angle bullets
var bulletOffset = 20 * Math.sin(game.math.degToRad(player.angle));
bullet.reset(player.x + bulletOffset, player.y);
var spreadAngle;
if (i === 0) spreadAngle = -20;
if (i === 1) spreadAngle = 0;
if (i === 2) spreadAngle = 20;
bullet.angle = player.angle + spreadAngle;
game.physics.arcade.velocityFromAngle(spreadAngle - 90, bullet_speed, bullet.body.velocity);
bullet.body.velocity.x += player.body.velocity.x;
}
bulletTimer = game.time.now + bullet_spacing;
}
}
}
}
function launchGreenEnemy() {
var enemy_speed = 400;
var enemy = greenEnemies.getFirstExists(false);
if (enemy) {
enemy.reset(game.rnd.integerInRange(0, game.width), -20);
enemy.body.velocity.x = game.rnd.integerInRange(-300, 300);
enemy.body.velocity.y = enemy_speed;
enemy.body.drag.x = 100;
enemy.trail.start(false, 800, 1);
// rotate enemy ship
enemy.update = function() {
enemy.angle = 190 - game.math.radToDeg(Math.atan2(enemy.body.velocity.x, enemy.body.velocity.y));
enemy.trail.x = enemy.x;
enemy.trail.y = enemy.y - 10;
// kill enemies if they go offscreen
if (enemy.y > game.height + 200) {
enemy.kill();
enemy.y = -20;
}
};
}
// send another enemy shortly
greenEnemyLaunchTimer = game.time.events.add(game.rnd.integerInRange(greenEnemySpacing, greenEnemySpacing + 1000), launchGreenEnemy);
}
function launchBlueEnemy() {
var startingX = game.rnd.integerInRange(100, game.width - 100);
var verticalSpeed = 180;
var spread = 60;
var frequency = 70;
var verticalSpacing = 70;
var numEnemiesInWave = 5;
// launch wave
for (var i = 0; i < numEnemiesInWave; i++) {
var enemy = blueEnemies.getFirstExists(false);
if (enemy) {
enemy.startingX = startingX;
enemy.reset(game.width / 2, -verticalSpacing * i);
enemy.body.velocity.y = verticalSpeed;
// set up firing
var bulletSpeed = 400;
var firingDelay = 2000;
enemy.bullets = -1;
enemy.lastShot = 0;
// for each enemy, update function
enemy.update = function() {
// wave movement
this.body.x = this.startingX + Math.sin((this.y) / frequency) * spread;
// give ship illusion of angle
angle = Math.cos((this.y + 60) / frequency);
// this.scale.x = 0.5 * Math.abs(angle) / 8;
this.angle = 180 - angle * 2;
// fire
enemyBullet = blueEnemyBullets.getFirstExists(false);
if (enemyBullet && this.alive && this.bullets && this.y > game.width / 8 && game.time.now > firingDelay + this.lastShot) {
this.lastShot = game.time.now;
this.bullets--;
enemyBullet.reset(this.x, this.y + this.height / 2);
enemyBullet.damageAmount = this.damageAmount;
var angle = game.physics.arcade.moveToObject(enemyBullet, player, bulletSpeed);
}
// kill enemies when they go off-screen
if (this.y > game.height + 200) {
this.kill();
}
};
}
}
// send another wave shortly
blueEnemyLaunchTimer = game.time.events.add(game.rnd.integerInRange(blueEnemySpacing, blueEnemySpacing + 4000), launchBlueEnemy);
}
function addEnemyEmitterTrail(enemy) {
var enemyTrail = game.add.emitter(enemy.x, player.y - 10, 100);
enemyTrail.width = 10;
enemyTrail.makeParticles('explosion', [1, 2, 3, 4, 5]);
enemyTrail.setXSpeed(20, -20);
enemyTrail.setRotation(50, -50);
enemyTrail.setAlpha(0.4, 0, 800);
enemyTrail.setScale(0.01, 0.1, 0.01, 0.1, 1000, Phaser.Easing.Quintic.Out);
enemy.trail = enemyTrail;
}
function shipCollide(player, enemy) {
enemy.kill();
player.damage(enemy.damageAmount);
shields.render();
if (player.alive) {
var explosion = explosions.getFirstExists(false);
explosion.reset(enemy.body.x + enemy.body.halfWidth, enemy.body.y + enemy.body.halfHeight);
explosion.body.velocity.y = enemy.body.velocity.y;
explosion.alpha = 0.7;
explosion.play('explosion', 30, false, true);
} else {
playerDeath.x = player.x;
playerDeath.y = player.y;
playerDeath.start(false, 1000, 10, 10);
}
}
function hitEnemy(enemy, bullet) {
var explosion = explosions.getFirstExists(false);
explosion.reset(bullet.body.x + bullet.body.halfWidth, bullet.body.y + bullet.body.halfHeight);
explosion.body.velocity.y = enemy.body.velocity.y;
explosion.alpha = 0.7;
// enemy.kill();
// bullet.kill()
explosion.play('explosion', 30, false, true);
if (enemy.finishOff && enemy.health < 5) {
enemy.finishOff();
} else {
enemy.damage(enemy.damageAmount);
}
bullet.kill();
// increase score
score += enemy.damageAmount * 10;
scoreText.render();
// as score increases, enemies come quicker
greenEnemySpacing *= 0.9;
// blue enemies launched when score = 1000
if (!blueEnemyLaunched && score > 1000) {
blueEnemyLaunched = true;
launchBlueEnemy();
// slow green enemies down when blue enemies exist
greenEnemySpacing *= 2;
}
// Launch boss
if (!bossLaunched && score > 2000) {
greenEnemySpacing = 5000;
blueEnemySpacing = 12000;
// dramatic pause before boss
game.time.events.add(2000, function() {
bossLaunched = true;
launchBoss();
});
}
}
function restart() {
// reset enemies
greenEnemies.callAll('kill');
game.time.events.remove(greenEnemyLaunchTimer);
game.time.events.add(1000, launchGreenEnemy);
blueEnemies.callAll('kill');
blueEnemyBullets.callAll('kill');
game.time.events.remove(blueEnemyLaunchTimer);
boss.kill();
booster.kill();
game.time.events.remove(bossLaunchTimer);
blueEnemies.callAll('kill');
game.time.events.remove(blueEnemyLaunchTimer);
// revive player
player.revive();
player.health = 200;
shields.render();
score = 0;
scoreText.render();
// hide text
gameOver.visible = false;
// reset pacing
greenEnemySpacing = 1000;
blueEnemyLaunched = false;
bossLaunched = false;
}
function enemyHitsPlayer(player, bullet) {
bullet.kill();
player.damage(bullet.damageAmount);
shields.render();
if (player.alive) {
var explosion = explosions.getFirstExists(false);
explosion.reset(player.body.x + player.body.halfWidth, player.body.y + player.body.halfHeight);
explosion.alpha = 0.7;
explosion.play('explosion', 30, false, true);
} else {
playerDeath.x = player.x;
playerDeath.y = player.y;
playerDeath.start(false, 1000, 10, 10);
}
}
function launchBoss() {
boss.reset(game.width / 2, -boss.height);
booster.start(false, 1000, 10);
boss.health = 501;
bossBulletTimer = game.time.now + 5000;
}
// Don't count a hit in the lower right and left quarants to aproximate better collisions
function bossHitTest(boss, bullet) {
if ((bullet.x > boss.x + boss.width / 5 &&
bullet.y > boss.y) ||
(bullet.x < boss.x - boss.width / 5 &&
bullet.y > boss.y)) {
return false;
} else {
return true;
}
}
function changeVolume(pointer) {
if (pointer.y < 100) {
music.mute = false;
} else if (pointer.y < 300) {
music.volume += 0.1;
} else {
music.volume -= 0.1;
}
}
};
</script>
</body>
</html>