I'm trying to create a slow-mo effect in my pong game so that when a player is a button
the paddles and ball will suddenly move at a far slower speed. I believe my understanding of
the concepts of adjusting
the timing in XNA are done, but I'm not sure of how to incorporate it into my design exactly.
The updates for my bats (paddles) are done in my Bat.cs class:
///
Controls the bat moving up
the screen
/// </summary>
public void MoveUp()
{
SetPosition(Position + new Vector2(0, -moveSpeed));
}
/// <summary>
///
Controls the bat moving down
the screen
/// </summary>
public void MoveDown()
{
SetPosition(Position + new Vector2(0, moveSpeed));
}
/// <summary>
/// Updates
the position of
the AI bat, in order to track
the ball
/// </summary>
/// <param name="ball"></param>
public virtual void UpdatePosition(Ball ball)
{
size.X = (int)Position.X;
size.Y = (int)Position.Y;
}
While
the rest of my game updates are done in my GameplayScreen.cs class (I'm using
the XNA game state management sample)
Class GameplayScreen
{
...........
bool slow;
..........
public override void Update(GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen)
base.Update(gameTime, otherScreenHasFocus, false);
if (IsActive)
{
// SlowMo Stuff
Elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (Slowmo) Elapsed *= .8f;
MoveTimer += Elapsed;
double elapsedTime = gameTime.ElapsedGameTime.TotalMilliseconds;
if (Keyboard.GetState().IsKeyDown(Keys.Up))
slow = true;
else if (Keyboard.GetState().IsKeyDown(Keys.Down))
slow = false;
if (slow == true)
elapsedTime *= .1f;
// Updating bat position
leftBat.UpdatePosition(ball);
rightBat.UpdatePosition(ball);
// Updating
the ball position
ball.UpdatePosition();
and finally my fixed time step is declared in
the constructor of my Game1.cs Class:
/// <summary>
///
The main game constructor.
/// </summary>
public Game1()
{
IsFixedTimeStep = slow = false;
}
So my question is:
Where do I place
the MoveTimer or elapsedTime, so that my bat will slow down accordingly?
