/// <summary>
/// Draws the background screen.
/// </summary>
public override void Draw(GameTime gameTime)
{
if (starfield != null)
{
// update the parallax movement
movement += gameTime.ElapsedGameTime.TotalSeconds;
Vector2 position = Vector2.Multiply(new Vector2(
(float)Math.Cos(movement / starsParallaxPeriod),
(float)Math.Sin(movement / starsParallaxPeriod)),
starsParallaxAmplitude);
// draw the stars
starfield.Draw(position);
}
// draw the title texture
if (titleTexture != null)
{
Vector2 titlePosition = new Vector2(
ScreenManager.TitleSafeArea.X +
(ScreenManager.TitleSafeArea.Width - titleTexture.Width) / 2f,
ScreenManager.TitleSafeArea.Y +
ScreenManager.TitleSafeArea.Height * 0.05f);
titlePosition.Y -= (float)Math.Pow(TransitionPosition, 2) *
titlePosition.Y;
ScreenManager.SpriteBatch.Begin();
ScreenManager.SpriteBatch.Draw(titleTexture, titlePosition,
new Color(255, 255, 255, TransitionAlpha));
ScreenManager.SpriteBatch.End();
}
}
/// <summary>
/// Draws the gameplay screen.
/// </summary>
public override void Draw(GameTime gameTime)
{
float elapsedTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (networkSession != null)
{
// make sure we know what the local ship is
if ((localShip == null) && (networkSession.LocalGamers.Count > 0))
{
PlayerData playerData = networkSession.LocalGamers[0].Tag
as PlayerData;
if (playerData.Ship != null)
{
localShip = playerData.Ship;
starfield.Reset(localShip.Position);
}
}
if (bloomComponent != null)
{
bloomComponent.BeginDraw();
}
// draw the world
if ((world != null) && (localShip != null) && !IsExiting)
{
Vector2 center = new Vector2(
localShip.Position.X + ScreenManager.GraphicsDevice.Viewport.X -
ScreenManager.GraphicsDevice.Viewport.Width / 2,
localShip.Position.Y + ScreenManager.GraphicsDevice.Viewport.Y -
ScreenManager.GraphicsDevice.Viewport.Height / 2);
starfield.Draw(center);
world.Draw(elapsedTime, center);
if (bloomComponent != null)
{
bloomComponent.Draw(gameTime);
}
}
// draw the user-interface elements of the game (scores, etc.)
DrawHud((float)gameTime.TotalGameTime.TotalSeconds);
}
// If the game is transitioning on or off, fade it out to black.
if (ScreenState == ScreenState.TransitionOn && (TransitionPosition > 0))
{
ScreenManager.FadeBackBufferToBlack(255 - TransitionAlpha);
}
}