GravityChooser.GravityChooserGameplayScreen Class Reference

This screen implements the actual game logic for the gravity chooser. More...

Inheritance diagram for GravityChooser.GravityChooserGameplayScreen:

List of all members.

Public Member Functions
	GravityChooserGameplayScreen ()
	Constructor of the screen.
override void	LoadContent ()
	Load graphics content for the game.
override void	UnloadContent ()
	Unload graphics content used by the game.
override void	Update (GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen)
	Updates the state of the game. This method checks the GameScreen.IsActive property, so the game will stop updating when the pause menu is active, or if you tab away to a different application.
override void	HandleInput (InputState input)
	Lets the game respond to player input. Unlike the Update method, this will only be called when the gameplay screen is active.
override void	Draw (GameTime gameTime)
	Draws the gameplay screen.

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Detailed Description

This screen implements the actual game logic for the gravity chooser.

Definition at line 23 of file GravityChooserGameplayScreen.cs.

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Constructor & Destructor Documentation

GravityChooser.GravityChooserGameplayScreen.GravityChooserGameplayScreen

(

)

Constructor of the screen.

Definition at line 69 of file GravityChooserGameplayScreen.cs.

        {
            TransitionOnTime = TimeSpan.FromSeconds(1.5);
            TransitionOffTime = TimeSpan.FromSeconds(0.5);
        }

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Member Function Documentation

override void GravityChooser.GravityChooserGameplayScreen.Draw

(

GameTime

gameTime

)

[virtual]

Draws the gameplay screen.

Reimplemented from NewGamePhysics.StateManager.GameScreen.

Definition at line 237 of file GravityChooserGameplayScreen.cs.

        {
            // Match transition to selector size
            gravitySelector.DisplaySize = 1.0f - TransitionPosition;

            // Draw gravity selector
            gravitySelector.Draw(gameTime);

            // If the game is transitioning on or off, fade it out to black.
            if (TransitionPosition > 0)
            {
                ScreenManager.FadeBackBufferToBlack(255 - TransitionAlpha);
            }
        }

override void GravityChooser.GravityChooserGameplayScreen.HandleInput

(

InputState

input

)

[virtual]

Lets the game respond to player input. Unlike the Update method, this will only be called when the gameplay screen is active.

Reimplemented from NewGamePhysics.StateManager.GameScreen.

Definition at line 137 of file GravityChooserGameplayScreen.cs.

        {
            if (input == null)
            {
                throw new ArgumentNullException("input");
            }

            // Look up inputs for the active player profile.
            PlayerIndex playerIndex;
            if (ControllingPlayer != null)
            {
                playerIndex = ControllingPlayer.Value;
            }
            else
            {
                playerIndex = 0;
            }

            KeyboardState keyboardState = input.CurrentKeyboardStates[(int)playerIndex];
            GamePadState gamePadState = input.CurrentGamePadStates[(int)playerIndex];

            // The game pauses either if the user presses the pause button, or if
            // they unplug the active gamepad. This requires us to keep track of
            // whether a gamepad was ever plugged in, because we don't want to pause
            // on PC if they are playing with a keyboard and have no gamepad at all!
            bool gamePadDisconnected = !gamePadState.IsConnected &&
                                       input.GamePadWasConnected[(int)playerIndex];

            if (input.IsInputCancel(ControllingPlayer) || gamePadDisconnected)
            {
                ScreenManager.AddScreen(new GravityChooserPauseMenuScreen(), ControllingPlayer);
            }
            else
            {
                if (input.IsInputSelect(ControllingPlayer))
                {
                    // Capture selected value
                    GravityChooser.state.CurrentGravity = gravitySelector.Gravity;

                    // Quit to main menu
                    GravityChooserLoadingScreen.Load(
                        ScreenManager, 
                        false, 
                        null, 
                        new GravityChooserBackgroundScreen(),
                        new GravityChooserMainMenuScreen());
                }

                // Keyboard speed adjustment
                if (input.IsInputLeft(null))
                {
                    longitudeSpeed += speedStep;
                }
                else if (input.IsInputRight(null))

                {
                    longitudeSpeed -= speedStep;
                }

                if (input.IsInputUp(null))
                {
                    latitudeSpeed += speedStep;
                }
                else if (input.IsInputDown(null))
                {
                    latitudeSpeed -= speedStep;
                }

                // Speed limiter
                if (longitudeSpeed < -speedMax)
                {
                    longitudeSpeed = -speedMax;
                }
                else if (longitudeSpeed > speedMax)
                {
                    longitudeSpeed = speedMax;
                }

                if (latitudeSpeed < -speedMax)
                {
                    latitudeSpeed = -speedMax;
                }
                else if (latitudeSpeed > speedMax)
                {
                    latitudeSpeed = speedMax;
                }

                // Update rotation
                gravitySelector.Longitude += longitudeSpeed;
                gravitySelector.Latitude += latitudeSpeed;

                // Drag speed
                longitudeSpeed *= speedDragFactor;
                latitudeSpeed *= speedDragFactor;
            }
        }

override void GravityChooser.GravityChooserGameplayScreen.LoadContent

(

)

[virtual]

Load graphics content for the game.

Reimplemented from NewGamePhysics.StateManager.GameScreen.

Definition at line 78 of file GravityChooserGameplayScreen.cs.

        {
            if (this.contentManager == null)
            {
                this.contentManager = new ContentManager(ScreenManager.Game.Services, "Content");
            }

            // Create physical element(s)
            GravityCalculator gravityCalculator = 
                new GravityCalculator(GravityChooser.state.CurrentCelestialObject);
            if (GravityChooser.state.CurrentCelestialObject == CelestialObject.Earth)
            {
                gravityCalculator.EarthGravityModel = GravityChooser.state.CurrentEarthGravityModel;
            }

            this.gravitySelector = new GravitySelector(
                ScreenManager, 
                GravityChooser.state.CurrentCelestialObject,
                gravityCalculator);

            // Reset game time
            ScreenManager.Game.ResetElapsedTime();
        }

override void GravityChooser.GravityChooserGameplayScreen.UnloadContent

(

)

[virtual]

Unload graphics content used by the game.

Reimplemented from NewGamePhysics.StateManager.GameScreen.

Definition at line 106 of file GravityChooserGameplayScreen.cs.

        {
            this.contentManager.Unload();
        }

override void GravityChooser.GravityChooserGameplayScreen.Update	(	GameTime	gameTime,
		bool	otherScreenHasFocus,
		bool	coveredByOtherScreen
	)			[virtual]

Updates the state of the game. This method checks the GameScreen.IsActive property, so the game will stop updating when the pause menu is active, or if you tab away to a different application.

Reimplemented from NewGamePhysics.StateManager.GameScreen.

Definition at line 120 of file GravityChooserGameplayScreen.cs.

        {
            base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);

            if (IsActive)
            {
                // Animate gravity selector
                gravitySelector.Update(gameTime);
            }
        }

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The documentation for this class was generated from the following file:

• C:/Users/Andreas Schiffler/Desktop/SVN/NewGamePhysics/GravityChooser/Screens/GravityChooserGameplayScreen.cs