// Do game processing and update the display
public override void Update(float fTimeSinceLastUpdateInSeconds, Graphics cBackBuffer)
{
// Do actions based on which state the Pong game is in
switch (mePongState)
{
default:
case EPongGameStates.Play:
UpdateGameObjects(fTimeSinceLastUpdateInSeconds, cBackBuffer);
DrawGame(fTimeSinceLastUpdateInSeconds, cBackBuffer);
break;
case EPongGameStates.Pause:
DrawGame(fTimeSinceLastUpdateInSeconds, cBackBuffer);
DisplayPause(fTimeSinceLastUpdateInSeconds, cBackBuffer);
break;
case EPongGameStates.WaitForNextBall:
// Calculate how long we have waited so far
mfNextBallWaitTime += fTimeSinceLastUpdateInSeconds;
// If we have waited one second
if (mfNextBallWaitTime > 1.0f)
{
// Start Playing the game again
mePongState = EPongGameStates.Play;
}
break;
}
}
// Reset class variables to their default values
public void Reset()
{
// Record that we are playing Pong
meGame = EGames.Spong;
// Set the games initial State
mePongState = EPongGameStates.Pause;
// Record that the game hasn't started yet
mbGameStarted = false;
// Set the Paddles initial position
mrPaddle = new Rectangle(80, 250, 20, 100);
// Set the Balls initial position, direction, and speed
mrBall = new Rectangle(150, 250, 20, 20);
mcBallDirection = new Vector2(1.0f, 0.0f);
mcBallDirection.Normalize();
mcBallDirection.Scale(miBALL_START_SPEED); // Initial speed
ResetBall();
// Start the player with no Score and 3 Lives
miScore = 0;
miLives = 3;
// Set the initial Pitch Meter Indicators position
mcPitchMeter.UpdatePitchIndicatorsPosition(0.5f);
}
// Handle key presses
public override EGames KeyDown(KeyEventArgs e)
{
// If the Pause button was pressed
if (e.KeyCode == Keys.Space)
{
// If the Game is currently Paused
if (mePongState == EPongGameStates.Pause)
{
// Switch to Playing the game
mePongState = EPongGameStates.Play;
// If the Game hasn't been started yet
if (!mbGameStarted)
{
// Record that the Game has been started
mbGameStarted = true;
// Reset the Score to zero
miScore = 0;
}
}
// Else the Game is not Paused
else
{
// So Pause the Game
mePongState = EPongGameStates.Pause;
}
}
// If Restart was pressed
if (e.KeyCode == Keys.R)
{
Reset();
}
// If the Mouse toggle button was pressed
if (e.KeyCode == Keys.M)
{
// Toggle the Mouse use on/off
mbMouseEnabled = !mbMouseEnabled;
}
return(meGame);
}
// Update the Ball and Paddle
private void UpdateGameObjects(float fTimeSinceLastUpdateInSeconds, Graphics cBackBuffer)
{
// Temp local variables
int iBallXDistanceTravelled = 0; // How far the Ball has moved in the X direction
int iBallYDistanceTravelled = 0; // How far the Ball has moved in the Y direction
Rectangle rBallOldPosition = mrBall; // Rectangle used to test Ball against collisions
Rectangle rBallCollisionRect; // Rectangle used to test Ball against collisions
// Move the Pitch Meter according to any Input Pitch
mcPitchMeter.AutoDetectPitchAndUpdateMeter();
// If some Pitch Input was received
if (CSoundInput.Instance().bInputReceived)
{
// Calculate what Percent of force should be used to move the Paddle
float fPercentToMove = mcPitchMeter.mfPitchIndicatorUnitPosition - 0.5f;
fPercentToMove *= 2.0f;
// Calculate how many pixels to move the Paddle
float fAmountToMove = fPercentToMove * (-miPADDLE_MAX_SPEED_PER_SECOND * fTimeSinceLastUpdateInSeconds);
// Move the Paddle
mrPaddle.Y += (int)fAmountToMove;
}
// Calculate how far the Ball should move
iBallXDistanceTravelled = (int)(mcBallDirection.X * fTimeSinceLastUpdateInSeconds);
iBallYDistanceTravelled = (int)(mcBallDirection.Y * fTimeSinceLastUpdateInSeconds);
// Move the Ball
mrBall.X += iBallXDistanceTravelled;
mrBall.Y += iBallYDistanceTravelled;
// Test for collision between the Ball and the Walls
// Rectangle to use to test collisions against the Ball
rBallCollisionRect = mrBall;
// If the Ball has travelled further than it's width or height in the last frame
if (Math.Abs(iBallXDistanceTravelled) >= mrBall.Width ||
Math.Abs(iBallYDistanceTravelled) >= mrBall.Height)
{
// If the Ball is moving right
if (iBallXDistanceTravelled > 0)
{
// If the Ball is moving down
if (iBallYDistanceTravelled > 0)
{
rBallCollisionRect.Location = rBallOldPosition.Location;
rBallCollisionRect.Width = mrBall.Right - rBallOldPosition.Left;
rBallCollisionRect.Height = mrBall.Bottom - rBallOldPosition.Top;
}
// Else the Ball is moving up
else
{
rBallCollisionRect.X = rBallOldPosition.X;
rBallCollisionRect.Y = mrBall.Top;
rBallCollisionRect.Width = mrBall.Right - rBallOldPosition.Left;
rBallCollisionRect.Height = rBallOldPosition.Bottom - mrBall.Top;
}
}
// Else the Ball is moving left
else
{
// If the Ball is moving down
if (iBallYDistanceTravelled > 0)
{
rBallCollisionRect.X = mrBall.Left;
rBallCollisionRect.Y = rBallOldPosition.Top;
rBallCollisionRect.Width = rBallOldPosition.Right - mrBall.Left;
rBallCollisionRect.Height = mrBall.Bottom - rBallOldPosition.Top;
}
// Else the Ball is moving up
else
{
rBallCollisionRect.Location = mrBall.Location;
rBallCollisionRect.Width = rBallOldPosition.Right - mrBall.Left;
rBallCollisionRect.Height = rBallOldPosition.Bottom - mrBall.Top;
}
}
}
// If the Ball hit the Top Wall
if (rBallCollisionRect.IntersectsWith(mrTopWall))
{
// Reverse it's Y direction
mcBallDirection.Y = -mcBallDirection.Y;
// Place it to be hitting the Wall (not in the Wall)
mrBall.Y = mrTopWall.Bottom;
// Play Sound
CFMOD.PlaySound(msSoundBallBounce, false);
}
// If the Ball hit the Bottom Wall
else if (rBallCollisionRect.IntersectsWith(mrBottomWall))
{
// Reverse it's Y direction
mcBallDirection.Y = -mcBallDirection.Y;
// Place it to be hitting the Wall (not in the Wall)
mrBall.Y = mrBottomWall.Top - mrBall.Height;
// Play Sound
CFMOD.PlaySound(msSoundBallBounce, false);
}
// If the Ball hit the Right wall
if (rBallCollisionRect.IntersectsWith(mrRightWall))
{
// Reverse it's X direction
mcBallDirection.X = -mcBallDirection.X;
// Place it to be hitting the Wall (not in the Wall)
mrBall.X = mrRightWall.Left - mrBall.Width;
// Play Sound
CFMOD.PlaySound(msSoundBallBounce, false);
}
// Test for collision between the Ball and the Paddle
// NOTE: Test for collision between Paddle before left wall incase ball is
// travelling too fast and would pass through both
if (rBallCollisionRect.IntersectsWith(mrPaddle))
{
// Increase the Balls speed slightly
float fSpeed = mcBallDirection.Length();
fSpeed += miBALL_SPEED_INCREMENT;
// Make sure Ball does not go too fast
if (fSpeed > miBALL_MAX_SPEED)
{
fSpeed = miBALL_MAX_SPEED;
}
// Reverse the Balls X direction
mcBallDirection.X = -mcBallDirection.X;
// Add some randomness to the Balls Y direction
float fRandomness = mcRandom.Next(-25, 25);
fRandomness /= 100.0f;
mcBallDirection.Normalize();
mcBallDirection.Y += fRandomness;
// Set the Balls speed
mcBallDirection.Normalize();
mcBallDirection.Scale(fSpeed);
// Place the Ball on the Paddle (not inside it)
mrBall.X = mrPaddle.Right;
// Play Sound
CFMOD.PlaySound(msSoundBallBounce, false);
}
// Else if the Ball hit the Left wall
else if (rBallCollisionRect.IntersectsWith(mrLeftWall))
{
// Player loses a life
miLives--;
// If the Player is dead
if (miLives == 0)
{
// Save the Players Score
int iScore = miScore;
// Restart the Game
Reset();
// Restore the Players Score
miScore = iScore;
// Play Game Over sound
CFMOD.PlaySound(msSoundGameOver, false);
// Check if the Player has beat their High Score
if (CProfiles.Instance().mcCurrentProfile.iScoreSpong < miScore)
{
// Save the Players new High Score
CProfiles.Instance().mcCurrentProfile.iScoreSpong = miScore;
CProfiles.Instance().SaveProfilesToFile();
}
// Exit this function so the Game restarts now
return;
}
// Play sound of losing a Ball
CFMOD.PlaySound(msSoundBallDied, false);
// Reset the Balls position and direction
ResetBall();
// Reset the Next Ball Wait Timer
mfNextBallWaitTime = 0.0f;
// Enter the Wait For Next Ball state
mePongState = EPongGameStates.WaitForNextBall;
}
// Update the Players Score
miScore += (int)(fTimeSinceLastUpdateInSeconds * 1000.0f);
}