Phaser: Toss the Turtle prototype

phaser-toss-the-turtle-demo.js

class Example extends Phaser.Scene
{
    preload() {
        this.load.image('backdrop', 'assets/pics/platformer-backdrop.png');
        this.load.image('cannon_head', 'assets/tests/timer/cannon_head.png');
        this.load.image('cannon_body', 'assets/tests/timer/cannon_body.png');
        this.load.spritesheet('chick', 'assets/sprites/chick.png', { frameWidth: 16, frameHeight: 18 });
    }

    create() {
        this.anims.create({ key: 'fly', frames: this.anims.generateFrameNumbers('chick', [ 0, 1, 2, 3 ]), frameRate: 5, repeat: -1 });

        // this.add.image(320, 256, 'backdrop').setScale(2);
        const backdrop = this.add.tileSprite(0, 0, game.config.width, game.config.height, 'backdrop')
            .setScale(2);
            // .setScrollFactor(0);
        this.backdrop = backdrop;

        const cannonHead = this.add.image(130, 416, 'cannon_head').setDepth(1);
        const cannon = this.add.image(130, 464, 'cannon_body').setDepth(1);
        const chick = this.physics.add.sprite(cannon.x, cannon.y - 50, 'chick')
            .setScale(2)
            .setDrag(20);
        this.chick = chick;
        const graphics = this.add.graphics({ lineStyle: { width: 10, color: 0xffdd00, alpha: 0.5 } });
        const line = new Phaser.Geom.Line();

        chick.setCollideWorldBounds(true, 0, 0.5);
        this.physics.world.checkCollision.up = false;
        this.physics.world.checkCollision.left = false;
        this.physics.world.checkCollision.right = false;

        let angle = 0;

        this.input.on('pointermove', (pointer) => {
            angle = Phaser.Math.Angle.BetweenPoints(cannon, pointer);
            cannonHead.rotation = angle;
            Phaser.Geom.Line.SetToAngle(line, cannon.x, cannon.y - 50, angle, 128);
            graphics.clear().strokeLineShape(line);
        });

        this.input.on('pointerup', () => {
            chick.enableBody(true, cannon.x, cannon.y - 50, true, true);
            chick.play('fly');
            this.physics.velocityFromRotation(angle, 600, chick.body.velocity);
            this.cameras.main.startFollow(chick, false, 1, 1);
            // this.cameras.main.setBounds(0, 0, undefined, this.game.config.height);
            // this.cameras.main.setDeadzone(0, 0);
            // this.cameras.main.setFollowOffset(0, 100);
        });
    }

    update() {
        if (this.chick.y > this.game.config.height) {
            this.backdrop.tilePositionY = this.chick.y;
        }
        this.backdrop.tilePositionX = this.chick.x;
        // this.backdrop.tilePositionY = this.cameras.main.y;
    }
}

const config = {
    type: Phaser.AUTO,
    width: 640,
    height: 512,
    parent: 'phaser-example',
    pixelArt: true,
    physics: {
        default: 'arcade',
        arcade: {
            gravity: { y: 300 }
        }
    },
    scene: Example
};

const game = new Phaser.Game(config);