class ball {
    constructor(x, y, r, velocityX, velocityY) {
        this.x = x;
        this.y = y;
        this.r = r;
        this.isColided = false;
        this.velocityX = velocityX;
        this.velocityY = velocityY;
    }
    intersects(other) {
        var changeX = this.x - other.x;
        var changeY = this.y - other.y;
        if (Math.sqrt(Math.pow(changeX, 2) + Math.pow(changeY, 2)) <= this.r + other.r) {
            return true;
        }
        return false;
    }
}