private void generatePlanet()
{
// Random radius
float r = GameMath.Clamp(10, 80, (float)GlobalRandom.NormalDouble(45, 10));
// y-coordinate
float y = 0;
do
{
y = (float)GlobalRandom.NextDouble(-360 + r, 360 - r);
} while (!this.checkPosition(y, r));
this.environment.AddPlanet(this.selectFactory(), new Vector2(640 + SideBuffer + r + this.environment.Offset, y), r);
}