ブロック崩しの当たり判定について

export class Boxes{
    constructor(x,y,width,height){
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
        this.isHit = false;
    }
    ball_judge(player_ball){
        if(this.isHit) return false;
        if(
            this.x - player_ball.radius <= player_ball.x && player_ball.x <= this.x + this.width + player_ball.radius &&
            this.y - player_ball.radius <= player_ball.y && player_ball.y <= this.y + this.height + player_ball.radius
        ){
            let reflected = false;
            
            if (player_ball.prevX < this.x - player_ball.radius){
                player_ball.vx = -Math.abs(player_ball.vx);
                player_ball.x = this.x - player_ball.radius;
                reflected = true;
            }else if(player_ball.prevX > this.x +this.width + player_ball.radius){
                player_ball.vx = -Math.abs(player_ball.vx);
                player_ball.x = this.x + this.width + player_ball.radius;
            }

            if(player_ball.prevY < this.y - player_ball.radius){
                player_ball.vy = -Math.abs(player_ball.vy);
                player_ball.y = this.y - player_ball.radius;
                reflected = true;
            }else if(player_ball.prevY > this.y + this.height + player_ball.radius){
                player_ball.vy = -Math.abs(player_ball.vy);
                player_ball.y = this.y + this.height + player_ball.radius;
                reflected = true;
            }
            this.isHit = true;

            player_ball.prevX = player_ball.x;
            player_ball.prevY = player_ball.y;
            return reflected;
        }
        player_ball.prevX = player_ball.x;
        player_ball.prevY = player_ball.y;
        return false;

    }
    show(){
        if (this.isHit) return;
        ctx.fillStyle = "blue";
        ctx.fillRect(this.x,this.y,this.width,this.height);
    }
}