/// <summary>
/// Moves the UFO sideways.
/// </summary>
public void UfoMoveSideways()
{
if (!this.IsSideMovingUfoDisplayed())
{
// 10% chance that a sidemoving UFO will appear
if (this.r.Next(1, 100) > 90)
{
// 50% chance of moving left or right.
if (this.r.Next(1, 100) > 50)
{
Ufo sideMovingUFO = new Ufo(20, 25, 100);
this.ufoMovingRight = true;
this.Model.Ufos.Add(sideMovingUFO);
}
else
{
Ufo sideMovingUFO = new Ufo((int)(Settings.WindowWidth - 20), 25, 100);
this.ufoMovingRight = false;
this.Model.Ufos.Add(sideMovingUFO);
}
}
}
else
{
// There is already a moving UFO. Loops through all the UFO's and moves the one with 100 points sideways.
for (int i = 0; i < this.Model.Ufos.Count(); i++)
{
Ufo actualUFO = this.Model.Ufos[i];
if (actualUFO.Points == 100 && this.ufoMovingRight == true)
{
actualUFO.MoveSideWays(Settings.UfoSideStepSize);
}
else if (actualUFO.Points == 100 && this.ufoMovingRight == false)
{
actualUFO.MoveSideWays(-Settings.UfoSideStepSize);
}
if (actualUFO.X < 0 || actualUFO.X > Settings.WindowWidth)
{
this.Model.Ufos.Remove(actualUFO);
}
}
}
}