public bool DecreaseShips()
{
this._pausedClock = PausedTimeLong;
//any ship left?
if (--this.Context.ShipsLeft > 0)
{
//resume game
this._pauseStage = PauseStage.ShipsLeft;
return(true);
}
else
{
//no more ships: the game is over
this._pauseStage = PauseStage.GameOver;
return(false);
}
}
private void RestartLevel()
{
//init barriers
for (int i = 0; i < BarriersCount; i++)
{
this.Barriers[i].BricksAlive = Barrier.AllBricks;
}
//init aliens
this._aliveAliensCount = AliensPerRow + AliensPerRow;
for (int i = 0; i < AliensPerRow; i++)
{
AlienBase alien = this.LargeAliens[i];
alien.IsAlive = true;
alien.Status = AlienStatus.Walk1;
alien.XCenter = 4 + i * 5;
alien.YCenter = 5;
alien = this.SmallAliens[i];
alien.IsAlive = true;
alien.Status = AlienStatus.Walk1;
alien.XCenter = 4 + i * 5;
alien.YCenter = 2;
}
//reset aliens' speed to the slowest
this._clockMask = 0x0F;
//do init the remaining parameters
this.ResumeLevel();
//shows the current level
this._pausedClock = PausedTimeLong;
this._pauseStage = PauseStage.ShowLevel;
}
public void StateChanged(PauseStage state, Int32 inSpeed, Int32 outSpeed)
{
}
public void StateChanged(PauseStage state, Int32 inSpeed, Int32 outSpeed)
{
}
public void ShowSaucerWorth()
{
this._pausedClock = PausedTimeShort;
this._pauseStage = PauseStage.SaucerHit;
}
public override GameStageBase OnCompose(CompositionTargetBase target)
{
GameStageBase result = null;
if (this._pausedClock == 0)
{
//here is the normal flow during the playable game
this.ShiftAliens = (this.Context.Clock & this._clockMask) == 0;
//update objects
this.Ship.Update(this);
this.Missile.Update(this);
this.Saucer.Update(this);
for (int i = 0; i < AliensPerRow; i++)
{
this.SmallAliens[i].Update(this);
this.LargeAliens[i].Update(this);
}
for (int i = 0; i < BombsCount; i++)
{
this.Bombs[i].Update(this);
}
//check collisions
if (this.Ship.DetectCollision(this))
{
}
if (this.Saucer.DetectCollision(this))
{
}
for (int i = 0; i < AliensPerRow; i++)
{
if (this.SmallAliens[i].DetectCollision(this))
{
break;
}
if (this.LargeAliens[i].DetectCollision(this))
{
break;
}
}
for (int i = 0; i < BarriersCount; i++)
{
if (this.Barriers[i].DetectCollision(this))
{
break;
}
}
//update context for next frame
this.CurrentAlienDir = this.NextAlienDir;
if (this.CurrentAlienDir == AlienDirection.GroundReached)
{
//aliens grounded: the game is over!
this._pausedClock = PausedTimeLong;
this._pauseStage = PauseStage.GameOver;
}
}
//this happens when some event has paused the game
else if (--this._pausedClock == 0)
{
//finalize the paused stage
switch (this._pauseStage)
{
case PauseStage.ShipsLeft:
//resume the game where was broken
this.ResumeLevel();
break;
case PauseStage.GameOver:
//back to the intro stage
result = new GameStageIntro(this.Context);
this.Context.Status = GameStatus.Registering;
break;
}
this._pauseStage = PauseStage.None;
}
//render the renderables
for (int i = 0; i < RenderableCount; i++)
{
this._renderables[i].OnRender(target);
}
//when paused, compose the required stage
if (this._pauseStage != PauseStage.None)
{
this._pauseStageHandlers[(int)this._pauseStage](target);
}
return(result);
}
