// Create our sprites
ship = AddSprite<ShipSprite>();
barrier1 = AddSprite<BarrierSprite>();
barrier2 = AddSprite<BarrierSprite>();
barrier3 = AddSprite<BarrierSprite>();
barrier4 = AddSprite<BarrierSprite>();
missile = AddSprite<MissileSprite>();
ufo = AddSprite<UfoSprite>();
//line = AddSprite<LineSprite>();
// Position the barriers
barrier1.X = -60;
barrier2.X = -20;
barrier3.X = 20;
barrier4.X = 60;
// Create our texts
Player1ScoreText = AddText(new Text
{
Alignment = HorizontalAlignments.Left,
VerticalAlign = VerticalAlignments.Top,
Scale = 0.4f,
Position = new Vector2(-100f, 100f),
Color = Color.White,
Value = "Player 1 Score: " + SpaceInvaders.Player1Score
});
Player2ScoreText = AddText(new Text
{
Alignment = HorizontalAlignments.Right,
VerticalAlign = VerticalAlignments.Top,
Scale = 0.4f,
}
PlayScreenModes Mode = PlayScreenModes.Init;
// Sprites on the screen
public ShipSprite ship;
MissileSprite missile;
List<AlienMissileSprite> alienMissiles = new List<AlienMissileSprite>();
UfoSprite ufo;
BarrierSprite barrier1;
BarrierSprite barrier2;
BarrierSprite barrier3;
BarrierSprite barrier4;
//LineSprite line;
List<AlienSprite> aliens = new List<AlienSprite>();
List<LivesSprite> lifesprites = new List<LivesSprite>();
float MoveWaitSeconds;
float AlienMoveXStep = 10;
float AlienMoveYStep = 10;
float AlienHitBottomY = -70;
float MoveWaitPercent = 0.97f;
int level;
int alienMoveSound = 1;
int AlienCount;
public int ActivePlayer;
public int Lives = 3;
AlienDirections alienDirection;
// Text on the screen
Text shipStatusText;
Text DebugText;
/// <summary>
/// Start the play screen
/// </summary>
public override void StartScene()
{
if (Mode == PlayScreenModes.Init)
{
Lives = 3;
lifesprites.Clear();
Sprites.RemoveAll(s => s is LivesSprite);
Costume lifecostume = new Costume();
lifecostume.Load("Ship");
lifecostume.YCenter = VerticalAlignments.Bottom;
float lifeSpacing = 10;
for (int i = 1; i <= Lives; i++)
{
LivesSprite newLifeSprite = AddSprite <LivesSprite>();
newLifeSprite.X = LivesText.Position.X + 21 + ((i - 1) * lifeSpacing);
newLifeSprite.Costume = lifecostume;
lifesprites.Add(newLifeSprite);
}
Score = 0;
Level = 0;
StartLevel();
HighScoreText.Value = "High Score: " + SpaceInvaders.HighScore;
ufo.Reset();
MoveWaitSeconds = 1;
alienDirection = AlienDirections.Right;
ship.Hide();
}
ShowPlayerNumber();
}
/// <summary>
/// Move all of the aliens
/// </summary>
void Move()
{
if (Mode != PlayScreenModes.Playing)
{
return;
}
// Move all of the aliens left or right, and keep track if any touched an edge
bool TouchedEdge = false;
foreach (AlienSprite alien in aliens)
{
if (alien.State == AlienStates.Alive)
{
if (alienDirection == AlienDirections.Right)
{
alien.X += AlienMoveXStep;
if (alien.IsTouchingRight())
{
TouchedEdge = true;
}
}
else
{
alien.X -= AlienMoveXStep;
if (alien.IsTouchingLeft())
{
TouchedEdge = true;
}
}
alien.alienMove();
}
}
// Did any aliens hit an edge
if (TouchedEdge)
{
// We touched an edge, so next time we'll use a different direction
if (alienDirection == AlienDirections.Right)
{
alienDirection = AlienDirections.Left;
}
else
{
alienDirection = AlienDirections.Right;
}
// Schedule the next move to be down
Wait(MoveWaitSeconds, MoveDown);
// The time after next, continue moving across
Wait(MoveWaitSeconds * 2, Move);
}
else
{
// Didn't hit an edge, just schedule the next move
Wait(MoveWaitSeconds, Move);
}
playMoveSound();
}
