1. Mohammad Shaker
mohammadshaker.com
@ZGTRShaker
2011, 2012, 2013, 2014
XNA Game Development
L06 – Input, Audio and Video Playback

2. Input
Keyboard, Mouse, Touch, Joystick, Sensors, etc.

3. Keyboard Input

4. Keyboard Input
• Why static?
KeyboardState state = Keyboard.GetState();

5. Keyboard Input
• Using Keyboard states
KeyboardState state = Keyboard.GetState();
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

6. Keyboard Input
• Using Keyboard states
bool leftArrowKeyDown = state.IsKeyDown(Keys.Left);
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

7. Keyboard Input
• Using Keyboard states
KeyboardState state = Keyboard.GetState();
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

8. Keyboard Input
• Using Keyboard states
KeyboardState state = Keyboard.GetState();
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

9. Keyboard Input - Checking for Key Presses
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

10. Keyboard Input - Checking for Key Presses
if(state.IsKeyDown(Keys.Left))
{
// do something here
}

11. Keyboard Input - Checking for Key Presses
Keys[] pressedKeys = state.GetPressedKeys();

12. Keyboard Input - Key Modifiers
if(
(
state.IsKeyDown(Keys.LeftControl)|| state.IsKeyDown(Keys.RightControl)
)
&& state.IsKeyDown(Keys.C)
)
{
// Do something here when Ctrl-C is pressed
}

13. Mouse Input

14. Mouse Input - Showing the Mouse
this.IsMouseVisible = true;

15. Mouse Input - Mouse Input?
MouseState mouseState = Mouse.GetState();
if(mouseState.LeftButton == ButtonState.Pressed)
{
// Do whatever you want here
}

16. Mouse Input - Mouse Input?
• Mouse built-in methods
– LeftMouseButton
– MiddleMouseButton
– RightMouseButton
– XButton1
– XButton2
– X
– Y
– ScrollWheelValue

17. Mouse Input - Location
• Getting Location
int x = mouseState.X;
int y = mouseState.Y;
Mouse.SetPosition(xLocation, yLocation);
• Setting Location

18. Xbox(Or Other!) Controller Input

19. Controller Input

20. Controller Input
• GamePadState gamePadState = GamePad.GetState(PlayerIndex.One);
if(gamePadState.IsConnected)
{
// then it is connected, and we can do stuff here
}
if(gamePadState.Buttons.X == ButtonState.Pressed)
{
// do something
}

21. Controller Input
float maxSpeed = 0.1f;
float changeInAngle = gamePadState.Thumbsticks.Left.X * maxSpeed;
// this variable is defined elsewhere
angle += changeInAngle;

22. Controller Input – Vibration effect!

23. Controller Input – Vibration Cool effect!
GamePad.SetVibration(PlayerIndex.One, 1.0f, 1.0f);

24. Audio

25. Audio
• Audio in XNA
• Audio Suggestions for Games
• A Simple Way to Play Sound Effects in XNA
• A Simple Way to Play Background Music in XNA
• Using XACT
• Using XACT Projects in an XNA Game
• XACT Sound Loops
• 3D Audio Effects: Location
• 3D Audio Effects: Attenuation based on Distance

26. Audio in XNA
• The Concept

27. Audio Suggestions For Games
• Audio Suggestions For Games
– royalty free music in google.com
– http://www.incompetech.com/m/c/royalty-free/
– http://www.flashkit.com/
• Use sound in your game. It adds a lot to the game. Don't just ignore it. ( Not in
our uni :( )

28. Playing Sound Effects
• Adding Sound Effects to your Game
– Managing Content!

29. Playing Sound Effects
• WAV Audio File (.wav extension)
private SoundEffect effect;
effect = Content.Load<SoundEffect>("SoundFX/ExtraLife");

30. Playing Sound Effects
• WAV Audio File (.wav extension)
private SoundEffect effect;
effect = Content.Load<SoundEffect>("SoundFX/ExtraLife");
effect.Play();
float volume = 1.0f;
effect.Play(volume);
float volume = 1.0f;
float pitch = -1.0f;
float pan = -1.0f;
bool loop = true;
effect.Play(volume, pitch, pan, loop);

31. Playing Sound Effects
• SoundEffectInstances class
SoundEffectInstance effectInstance = effect1.Play();
effectInstance.Stop();

32. Playing Sound Effects
• SoundEffectInstances class
SoundEffectInstance effectInstance = effect1.Play();
effectInstance.Stop();

33. Playing Background Music
• Using the Song and MediaPlayer Classes to Play Audio
Song song = Content.Load<Song>("song_title");
// Put the name of your song here instead of "song_title"
MediaPlayer.Play(song);
MediaPlayer.IsRepeating = true;

34. Using XACT
• Cross-platform Audio Creation Tool
• The concept
• Using XACT
– Using XACT
– Using XACT Projects in an XNA Game
– XACT Sound Loops
– 3D Audio Effects: Location
– 3D Audio Effects: Attenuation based on Distance

35. Using XACT
• Small Tutorials
– http://rbwhitaker.wikidot.com/audio-tutorials
• http://rbwhitaker.wikidot.com/using-xact
• http://rbwhitaker.wikidot.com/playing-sound
• http://rbwhitaker.wikidot.com/xact-sound-loops
• http://rbwhitaker.wikidot.com/3d-audio-effects-location
– Books
• Microsoft Book
• Aaron Reed (O’Reilly)

36. Video Playback

37. Video Playback
• Loading the Video in XNA, Game1 Global Scope
Video video;
VideoPlayer player;

38. Video Playback
• Loading the Video in XNA, Game1 Global Scope
• LoadContent()
Video video;
VideoPlayer player;
video = Content.Load<Video>("AVideoToPlayback");
player = new VideoPlayer();

39. Video Playback
• Starting the Video
player.Play(video);

40. Video Playback
• Starting the Video
• Update()
player.Play(video);
if (player.State == MediaState.Stopped)
{
player.IsLooped = true;
player.Play(video);
}

41. Video Playback
• Looping
player.IsLooped = true;

42. Video Playback
• Drawing the Video, Draw()
Texture2D videoTexture = null;
if (player.State!= MediaState.Stopped)
videoTexture = player.GetTexture();

43. Video Playback
• Drawing the Video, Draw()
Texture2D videoTexture = null;
if (player.State!= MediaState.Stopped)
videoTexture = player.GetTexture();

44. Video Playback
• Drawing the Video, Draw()
Texture2D videoTexture = null;
if (player.State!= MediaState.Stopped)
videoTexture = player.GetTexture();

45. Video Playback
• Drawing the Video, Draw()
Texture2D videoTexture = null;
if (player.State!= MediaState.Stopped)
videoTexture = player.GetTexture();

46. Video Playback
• Drawing the Video, Draw()
Texture2D videoTexture = null;
if (player.State!= MediaState.Stopped)
videoTexture = player.GetTexture();
if (videoTexture!= null)
{
spriteBatch.Begin();
spriteBatch.Draw(videoTexture, new Rectangle(0, 0, 400, 300), Color.White);
spriteBatch.End();
}