public void AddGeneratedBall()
{
int xCoordSpawn = 0;
int yCoordSpawn = 0;
Random randomGen = new Random();
xCoordSpawn = 30 + randomGen.Next(width - 60);
yCoordSpawn = 30 + randomGen.Next(height - 60);
randomGen = new Random();
double cosGen = randomGen.NextDouble() * 2 - 1;
int sign = Math.Sign(-1 + randomGen.Next(1)) == 0 ? 1 : Math.Sign(-1 + randomGen.Next(1));
double sinGen = sign * Math.Sqrt(1 - cosGen * cosGen);
Ball ball = new Ball(xCoordSpawn, yCoordSpawn, ballsDiametrDefault, ballsColorDefault, Math.Atan2(sinGen, cosGen));
balls.Add(ball);
ball.Id = controller.AddBallRedrawing(ball);
}