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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Thirteen Potions</title>
<meta
name="description"
content="Get all the potions as fast as you can!"
/>
<meta property="og:image" content="./og.png" />
<link rel="icon" href="./knight/right.png" />
<script src="./phaser.min.js"></script>
<style type="text/css">
html,
body,
#game-container {
margin: 0;
padding: 0;
background: #3b2731;
}
#game-container {
width: 100vw;
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}
</style>
<script type="text/javascript">
let config = {
type: Phaser.AUTO,
width: 720,
height: 480,
parent: "game-container",
pixelArt: true,
scene: {
preload: preload,
create: create,
update: update,
},
physics: {
default: "arcade",
arcade: {
gravity: { y: 0 }, // Top down game, so no gravity
},
},
};
let game = new Phaser.Game(config);
let controls;
let cursors;
let player;
let playerStartedMoving = false;
let speed = 100;
let PotionLayer;
let potions;
let potionScore = 0;
let EnemyLayer;
let enemies;
let text;
let time;
let timerText;
let finalTime = -1;
// Runs once, loads up assets like images and audio
function preload() {
this.load.image("tiles", "./tilemap_packed.png");
this.load.image("potion", "./potion.png");
this.load.image("enemy", "./enemy.png");
this.load.tilemapTiledJSON("map", "./map/map.json");
this.load.spritesheet("knight", "./knight/knight_packed.png", {
frameWidth: 16,
frameHeight: 16,
});
}
// Runs once, after all assets in preload
function create() {
const map = this.make.tilemap({
key: "map",
tileWidth: 16,
tileHeight: 16,
});
const tileset = map.addTilesetImage("thirteen-potions", "tiles");
// Parameters: layer name (or index) from Tiled, tileset, x, y
const groundLayer = map.createLayer("Ground", tileset, 0, 0);
const wallLayer = map.createLayer("Walls", tileset, 0, 0);
wallLayer.setCollisionByExclusion([-1]);
PotionLayer = map.getObjectLayer("Things")["objects"].slice(1);
EnemyLayer = map.getObjectLayer("Enemies")["objects"];
// Adding potions
potions = this.physics.add.staticGroup();
PotionLayer.forEach((object) => {
let obj = potions.create(object.x, object.y - 16, "potion");
obj.setScale(object.width / 16, object.height / 16);
obj.setOrigin(0);
obj.body.width = object.width;
obj.body.height = object.height;
});
// Adding enemies
enemies = this.physics.add.group();
EnemyLayer.forEach((object) => {
let obj = enemies.create(object.x, object.y - 16, "enemy");
obj.setScale(object.width / 16, object.height / 16);
obj.setOrigin(0);
obj.body.width = object.width;
obj.body.height = object.height;
});
// Adding player to the screen
const spawnPoint = map.findObject(
"Things",
(obj) => obj.name === "Spawn"
);
player = this.physics.add
.sprite(spawnPoint.x, spawnPoint.y, "knight")
.setInteractive(this.input.makePixelPerfect(0));
this.physics.add.collider(player, wallLayer);
player.setCollideWorldBounds(true);
this.anims.create({
key: "right",
frames: this.anims.generateFrameNumbers("knight", {
start: 0,
end: 1,
}),
frameRate: 10,
repeat: -1,
});
this.anims.create({
key: "left",
frames: this.anims.generateFrameNumbers("knight", {
start: 2,
end: 3,
}),
frameRate: 10,
repeat: -1,
});
this.anims.create({
key: "up-right",
frames: this.anims.generateFrameNumbers("knight", {
start: 4,
end: 5,
}),
frameRate: 10,
repeat: -1,
});
this.anims.create({
key: "up-left",
frames: this.anims.generateFrameNumbers("knight", {
start: 6,
end: 7,
}),
frameRate: 10,
repeat: -1,
});
this.physics.add.overlap(player, potions, collectPotion, null, this);
this.physics.add.overlap(player, enemies, zappy, null, this);
// Phaser default camera
let camera = this.cameras.main;
camera.zoom = 4;
camera.setBounds(0, 0, 720, 480);
camera.startFollow(player);
cursors = this.input.keyboard.createCursorKeys();
text = this.add.text(270, 180, `Potions left: ${13 - potionScore}`, {
font: "8px",
fill: "#ffffff",
backgroundColor: "#3B2731",
padding: { x: 2, y: 2 },
});
text.setScrollFactor(0);
// Timer Text
timerText = this.add.text(270, 287, "Time: 0", {
font: "9px",
fill: "#ffffff",
backgroundColor: "#3B2731",
padding: { x: 2, y: 2 },
});
timerText.setScrollFactor(0);
this.time.addEvent({
delay: 1000,
callback: function () {
if (playerStartedMoving && finalTime === -1) {
timerText.setText(
"Time: " + Math.ceil((this.time.now - this.startTime) / 1000)
);
}
},
callbackScope: this,
loop: true,
});
}
function collectPotion(player, potion) {
potion.destroy(potion.x, potion.y); // remove the tile
potionScore++;
text.setText(`Potions left: ${13 - potionScore}`);
return false;
}
function zappy() {
speed = 50;
player.alpha = 0.6;
player.tint = 0xff0000;
setTimeout(() => {
speed = 100;
player.alpha = 1;
player.clearTint();
}, 2000);
return false;
}
// Runs once per frame for the duration of the scene
function update(time, delta) {
const prevVelocity = player.body.velocity.clone();
player.body.setVelocity(0);
if (potionScore === 13 && finalTime === -1) {
finalTime = Math.ceil((this.time.now - this.startTime) / 1000);
timerText.setText(`Final Time: ${finalTime} seconds!`);
}
if (
!playerStartedMoving &&
prevVelocity.x !== 0 &&
prevVelocity.y !== 0
) {
playerStartedMoving = true;
this.startTime = this.time.now;
}
// Move the enemy around randomly each update
enemies.children.iterate(function (enemy) {
enemy.body.setVelocity(
Phaser.Math.Between(-16, 16),
Phaser.Math.Between(-16, 16)
);
});
// Horizontal movement
if (cursors.left.isDown) {
player.body.setVelocityX(speed * -1);
} else if (cursors.right.isDown) {
player.body.setVelocityX(speed);
}
// Vertical movement
if (cursors.up.isDown) {
player.body.setVelocityY(speed * -1);
} else if (cursors.down.isDown) {
player.body.setVelocityY(speed);
}
// Normalize and scale the velocity so that player can't move faster along a diagonal
player.body.velocity.normalize().scale(speed);
if (cursors.up.isDown && cursors.right.isDown) {
player.anims.play("up-right", true);
} else if (cursors.up.isDown && cursors.left.isDown) {
player.anims.play("up-left", true);
} else if (cursors.left.isDown) {
player.anims.play("left", true);
} else if (cursors.right.isDown) {
player.anims.play("right", true);
} else if (cursors.up.isDown) {
player.anims.play("up-right", true);
} else if (cursors.down.isDown) {
player.anims.play("right", true);
} else {
player.anims.stop();
// If we were moving, pick and idle frame to use
if (prevVelocity.x < 0) player.setTexture("knight", 2); // look left
else if (prevVelocity.x > 0)
player.setTexture("knight", 0); // look right
else if (prevVelocity.y < 0)
player.setTexture("knight", 4); // look up
else if (prevVelocity.y > 0) player.setTexture("knight", 0); // look down
}
}
</script>
</head>
<body>
<div id="game-container"></div>
</body>
</html>