GameWorld.js

function GameWorld(){

    this.balls = CONSTANTS.ballsParams.map(params => new Ball(...params));

    this.whiteBall = this.balls.find(ball => ball.color === COLOR.WHITE);

    this.stick = new Stick(
        this.whiteBall.position.copy(), 
        this.whiteBall.shoot.bind(this.whiteBall)
    );

    this.table = {
        TopY: 57,
        RightX: 1443,
        BottomY: 768,
        LeftX: 57
    }

}

GameWorld.prototype.handleCollisions = function(){

    for(let i = 0 ; i < this.balls.length ; i++ ){

        this.balls[i].handleBallInPocket();
        this.balls[i].collideWithTable(this.table);

        for(let j = i + 1 ; j < this.balls.length ; j++ ){
            const firstBall = this.balls[i];
            const secondBall = this.balls[j];
            firstBall.collideWithBall(secondBall);
        }
    }
}

GameWorld.prototype.update = function(){

    this.handleCollisions();

    this.stick.update();
    
    for(let i = 0 ; i < this.balls.length ; i++){
        this.balls[i].update(CONSTANTS.delta);
    }

    if(!this.ballsMoving() && this.stick.shot){
        this.stick.reposition(this.whiteBall.position);
    }

}

GameWorld.prototype.draw = function(){
    
    Canvas.drawImage(sprites.background, new Vector2());

    for(let i = 0 ; i < this.balls.length ; i++){
        this.balls[i].draw();
    }

    this.stick.draw();
}

GameWorld.prototype.ballsMoving = function(){

    let ballsMoving = false;

    for( let i = 0 ; i < this.balls.length ; i++ ){
        if(this.balls[i].moving){
            ballsMoving = true;
            break;
        }
    }

    return ballsMoving;
}