ld40.js

   1         var game = new Phaser.Game(800, 600, Phaser.AUTO, '', { preload: function() { this.state.add('GamePlay', GamePlay, true); } });
   2         var cursors;
   3         var player;
   4         var walls;
   5         var determinations;             // I know it's grammatically incorrect. :P
   6         var monsters;
   7         var nexttime_monsterspawn;
   8         var nexttime_determination;
   9
  10         const WAIT_KEY                  =    200;
  11         const WAIT_SHOOT                =    200;
  12         const WAIT_INVINCIBILITY        =    800;
  13         const WAIT_SOULMODE             =  10000;
  14         const WAIT_MONSTERSHOOT         =    500;
  15         const WAIT_MONSTERSPAWN         =  20000;
  16         const WAIT_DETERMINATION        =   4000;
  17         const WALL_THICKNESS            =     16;
  18         const WALL_BORDER               =      8;
  19         const WALL_BORDERBOTTOM         =     48;
  20         const HB_THICKNESS              =     20;
  21         const MAX_HEALTH                =     20;
  22         const MONSTER_HEALTH            =     20;
  23         const MODE_DETERMINATION        =      0;
  24         const MODE_JUSTICE              =      1;
  25         const SPEED_PLAYER              =    150;
  26         const SPEED_PPROJECTILE         =    500;
  27         const SPEED_MPROJECTILE         =    200;
  28
  29         window.addEventListener("keydown", function(e) {
  30             // Prevent default browser action for arrows and spacebar
  31             if([32, 37, 38, 39, 40].indexOf(e.keyCode) > -1) {
  32             e.preventDefault();
  33             }
  34         }, false);
  35
  36         function sign(n) {
  37             if (n >= 0) { return 1 } else { return -1 };
  38         }
  39
  40         class Player extends Phaser.Text {
  41             constructor(x, y) {
  42                 super(game, x, y, "♥️", { align: 'center', fill: 'red', font: 'Ubuntu Mono', fontSize: 32, fontWeight: 'bold' });
  43                 this.anchor.setTo(0.5, 0.5);
  44                 this.maxHealth = MAX_HEALTH;
  45                 this.health = this.maxHealth;
  46                 this.love = 1;
  47                 this.lastmovetime = 0;
  48                 this.lasttime_shoot = 0;
  49                 this.lasttime_mode = 0;
  50                 this.lasttime_damage = 0;
  51                 this.speed = SPEED_PLAYER;
  52                 this.switchmode(MODE_DETERMINATION);
  53                 this.weapon = new JusticeBlaster(game, this);
  54                 this.weapon.bulletSpeed = SPEED_PPROJECTILE;
  55                 this.healthBar = new HealthBar(60, game.world.height - (WALL_BORDERBOTTOM / 2));
  56             }
  57
  58             enablePhysics() {
  59                 game.physics.arcade.enable(this);
  60                 this.body.bounce.y = 0.2;
  61                 this.body.bounce.x = 0.2;
  62                 this.body.collideWorldBounds = true;
  63             }
  64
  65             overlap_determination(determination) {
  66                 determination.kill();
  67                 this.heal(2);
  68                 this.speed += 50;
  69                 this.switchmode(MODE_JUSTICE);
  70             }
  71
  72             damage(amount) {
  73                 if ((game.time.now - this.lasttime_damage) > WAIT_INVINCIBILITY)
  74                 {
  75                     super.damage(amount);
  76                     this.lasttime_damage = game.time.now;
  77                 }
  78             }
  79
  80             kill() {
  81                 this.health = 0;
  82                 this.healthBar.update(this.love, this.maxHealth, this.health);
  83                 super.kill();
  84                 this.game.state.start('GameOver');
  85             }
  86
  87             loveUp() {
  88                 this.love++
  89                 this.maxHealth += this.love;
  90                 this.heal(this.love);
  91             }
  92
  93             control() {
  94                 if (this.alive)
  95                 {
  96                     if (cursors.left.isDown)
  97                     {
  98                         player.body.velocity.x = -player.speed;
  99                         player.lastmovetime = game.time.now;
 100                     }
 101                     else if (cursors.right.isDown)
 102                     {
 103                         player.body.velocity.x = player.speed;
 104                         player.lastmovetime = game.time.now;
 105                     }
 106                     if (cursors.up.isDown)
 107                     {
 108                         player.body.velocity.y = -player.speed;
 109                         player.lastmovetime = game.time.now;
 110                     }
 111                     else if (cursors.down.isDown)
 112                     {
 113                         player.body.velocity.y = player.speed;
 114                         player.lastmovetime = game.time.now;
 115                     }
 116                     if ((this.mode == MODE_JUSTICE) && game.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR) && ((game.time.now - this.lasttime_shoot) > WAIT_SHOOT))
 117                     {
 118                         this.shoot();
 119                     }
 120                 }
 121             }
 122
 123             switchmode(soulmode) {
 124                 switch(soulmode)
 125                 {
 126                     case MODE_DETERMINATION:
 127                         this.addColor('red', 0);
 128                         break;
 129                     case MODE_JUSTICE:
 130                         this.addColor('yellow', 0);
 131                         this.lasttime_mode = game.time.now;
 132                         break;
 133                 }
 134                 this.mode = soulmode;
 135             }
 136
 137             shoot() {
 138                 this.weapon.fire(this, 0, this.y);
 139                 this.weapon.fire(this, this.x, 0);
 140                 this.weapon.fire(this, this.x, game.world.height);
 141                 this.weapon.fire(this, game.world.width, this.y);
 142                 this.lasttime_shoot = game.time.now;
 143             }
 144
 145             update() {
 146                 super.update();
 147                 this.control();
 148                 this.healthBar.update(this.love, this.maxHealth, this.health);
 149                 game.physics.arcade.overlap(monsters, this.weapon.bullets, function(m,b) { b.overlap_monster(m); });
 150                 if ((game.time.now - this.lasttime_mode) > WAIT_SOULMODE) { this.switchmode(MODE_DETERMINATION); }
 151             }
 152         }
 153
 154         class Monster extends Phaser.Sprite {
 155             constructor(x, y) {
 156                 super(game, x, y, 'monster');
 157                 this.anchor.setTo(0.5, 0.5);
 158                 this.health = MONSTER_HEALTH;
 159                 this.nexttime_shoot = game.time.now;
 160                 this.weapon = new JusticeBlaster(game, this);
 161                 this.weapon.bulletSpeed = SPEED_MPROJECTILE;
 162                 this.weapon.trackSprite(this);
 163                 this.shaketween = game.add.tween(this).to({ x: this.x + (sign(Math.random() - 0.5)) * 5 }, 10, Phaser.Easing.Sinusoidal.InOut, false, 0, 8, true);
 164             }
 165
 166             enablePhysics() {
 167                 game.physics.arcade.enable(this);
 168             }
 169
 170             damage(amount) {
 171                 super.damage(amount);
 172                 if (this.alive) { this.shaketween.start(); }
 173             }
 174
 175             kill() {
 176                 super.kill();
 177                 player.loveUp();
 178             }
 179
 180             overlap_player(player) {
 181                 player.damage(10);
 182                 player.switchmode(MODE_DETERMINATION);
 183             }
 184
 185             update() {
 186                 super.update();
 187                 if (this.alive && player.alive && (game.time.now > this.nexttime_shoot))
 188                 {
 189                     this.weapon.fireAtSprite(player);
 190                     this.nexttime_shoot = game.time.now + (WAIT_MONSTERSHOOT / 2) + (Math.random() * WAIT_MONSTERSHOOT);
 191                 }
 192                 game.physics.arcade.overlap(player, this.weapon.bullets, function(p,b) { b.overlap_player(p); });
 193             }
 194         }
 195
 196         class Determination extends Phaser.Sprite {
 197             constructor(x, y) {
 198                 super(game, x, y, 'determination');
 199                 this.anchor.setTo(0.5, 0.5);
 200             }
 201
 202             enablePhysics() {
 203                 game.physics.arcade.enable(this);
 204             }
 205         }
 206
 207         class Justice extends Phaser.Bullet {
 208             constructor(game, x, y, key, frame) {
 209                 super(game, x, y, 'projectile');
 210                 this.anchor.setTo(0.5, 0.5);
 211             }
 212
 213             overlap_monster(entity) {
 214                 entity.damage(player.love);
 215                 this.kill();
 216             }
 217
 218             overlap_player(player) {
 219                 player.damage(player.love);
 220                 this.kill();
 221             }
 222         }
 223
 224         class JusticeBlaster extends Phaser.Weapon {
 225             constructor(game, parent) {
 226                 super(game, parent);
 227                 this.bulletClass = Justice;
 228                 this.multiFire = true;
 229                 this.createBullets(100, null);
 230             }
 231         }
 232
 233         class HealthBar {
 234             constructor(x, y) {
 235                 this.mhealth = game.add.tileSprite(x + 10, y, 0, HB_THICKNESS, 'wall');
 236                 this.ahealth = game.add.tileSprite(x + 10, y, 0, HB_THICKNESS, 'wall');
 237                 this.mhealth.anchor.setTo(0, 0.5);
 238                 this.ahealth.anchor.setTo(0, 0.5);
 239                 this.mhealth.tint = '0xff0000';
 240                 this.ahealth.tint = '0xffff00';
 241                 this.text_love = new Phaser.Text(game, x - 50, y + 2, null, { align: 'center', fill: 'white', font: 'Ubuntu Mono', fontSize: 16, fontWeight: 'bold' });
 242                 this.text_love.anchor.setTo(0, 0.5);
 243                 game.add.existing(this.text_love);
 244             }
 245
 246             update(love, mhealth, ahealth) {
 247                 this.mhealth.width = mhealth;
 248                 this.ahealth.width = ahealth;
 249                 this.text_love.text = "LV " + love;
 250             }
 251         }
 252
 253
 254         class GamePlay extends Phaser.State {
 255
 256             constructor() {
 257
 258                 super();
 259                 game.state.add('GameOver', GameOver, false);
 260
 261             }
 262
 263             preload() {
 264
 265                 game.load.image('wall', 'wall.png');
 266                 game.load.image('player', 'player.png');
 267                 game.load.image('monster', 'monster.png');
 268                 game.load.image('determination', 'determination.png');
 269                 game.load.image('projectile', 'projectile.png');
 270
 271             }
 272
 273             create() {
 274
 275                 game.world.setBounds(0, 0, 800, 600);
 276                 game.stage.backgroundColor = '#000000';
 277                 game.physics.startSystem(Phaser.Physics.ARCADE);
 278
 279                 walls = game.add.group();
 280                 walls.classType = Phaser.TileSprite;
 281                 walls.enableBody = true;
 282
 283                 walls.add(game.add.tileSprite(WALL_BORDER, WALL_BORDER, game.world.width - (WALL_BORDER * 2), WALL_THICKNESS, 'wall'));
 284                 walls.add(game.add.tileSprite(WALL_BORDER, game.world.height - WALL_THICKNESS - WALL_BORDERBOTTOM, game.world.width - (WALL_BORDER * 2), WALL_THICKNESS, 'wall'));
 285                 walls.add(game.add.tileSprite(WALL_BORDER, WALL_BORDER, WALL_THICKNESS, game.world.height - WALL_BORDER - WALL_BORDERBOTTOM, 'wall'));
 286                 walls.add(game.add.tileSprite(game.world.width - WALL_THICKNESS - WALL_BORDER, WALL_BORDER, WALL_THICKNESS, game.world.height - WALL_BORDER - WALL_BORDERBOTTOM, 'wall'));
 287                 walls.children.forEach(function(wall) { wall.body.immovable = true; });
 288
 289                 determinations = game.add.group();
 290                 nexttime_determination = Math.random() * WAIT_DETERMINATION;
 291
 292                 monsters = game.add.group();
 293                 nexttime_monsterspawn = WAIT_MONSTERSPAWN / 4;
 294
 295                 player = new Player(game.world.width / 2, game.world.height / 2);
 296                 player.enablePhysics();
 297                 game.add.existing(player);
 298                 game.camera.follow(player);
 299                 cursors = game.input.keyboard.createCursorKeys();
 300
 301             }
 302
 303             update() {
 304
 305                 game.physics.arcade.collide(player, walls);
 306                 game.physics.arcade.overlap(player, determinations, function(p,d) { p.overlap_determination(d); });
 307                 game.physics.arcade.overlap(player, monsters, function(p,m) { m.overlap_player(p); });
 308
 309                 if (game.time.now > nexttime_determination)
 310                 {
 311                     var determination = new Determination((Math.random() * (game.world.width - ((WALL_THICKNESS + WALL_BORDER) * 4))) + ((WALL_THICKNESS + WALL_BORDER) * 2), (Math.random() * (game.world.height - ((WALL_THICKNESS + WALL_BORDER) * 4) - WALL_BORDERBOTTOM)) + ((WALL_THICKNESS + WALL_BORDER) * 2));
 312                     determination.enablePhysics();
 313                     determinations.add(determination);
 314                     nexttime_determination = game.time.now + (WAIT_DETERMINATION / 2) + (Math.random() * WAIT_DETERMINATION);
 315                 }
 316
 317                 if (game.time.now > nexttime_monsterspawn)
 318                 {
 319                     var monster = new Monster(Math.random() * game.world.width, Math.random() * game.world.height);
 320                     monster.enablePhysics();
 321                     monsters.add(monster);
 322                     var waittime = WAIT_MONSTERSPAWN - ((Math.random() * 2000) * player.love);
 323                     nexttime_monsterspawn = game.time.now + waittime;
 324                     console.log('Next monster in ' + waittime);
 325                 }
 326
 327                 if ((game.time.now - player.lastmovetime) > WAIT_KEY) player.body.velocity.x = player.body.velocity.y = 0;
 328
 329             }
 330         }
 331
 332         class GameOver extends Phaser.State {
 333
 334             create() {
 335
 336                 this.game.add.text(this.game.world.width / 2, 0, "GAME\nOVER", { align: 'center', fill: 'white', font: 'Ubuntu Mono', fontSize: 160, fontWeight: 'bold' }).anchor.setTo(0.5, 0);
 337                 this.game.add.text(this.game.world.width / 2, this.game.world.height * 0.75, "Stay determined...", { align: 'center', fill: 'white', font: 'Ubuntu Mono', fontSize: 24, fontWeight: 'bold' }).anchor.setTo(0.5, 0);
 338
 339             }
 340
 341             update() {
 342
 343                 if (this.game.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR))
 344                 {
 345                     this.game.state.start('GamePlay');
 346                 }
 347
 348             }
 349
 350         }