Graphics.FreeGame.Base

Abstract structures that represents user interfaces

Documentation

type Game = Free GameAction

data GameAction cont

A base for Game monad.

Constructors

Tick cont

EmbedIO (IO cont)

Bracket (Game cont)

DrawPicture Picture cont

LoadPicture Bitmap (Picture -> cont)

AskInput Key (Bool -> cont)

GetMouseState (MouseState -> cont)

Instances

Functor GameAction

data GameParam

Parameters of the application.

Constructors

GameParam

Fields

framePerSecond :: Int

windowSize :: (Int, Int)

windowTitle :: String

windowed :: Bool

data Picture

A 2D Picture.

Constructors

Image Unique

An abstract primitive image.

Pictures [Picture]

Combined picture from some pictures.

Rotate Float Picture

Rotated picture by the given angle (in degrees, counterclockwise).

Scale Vec2 Picture

Scaled picture.

Translate Vec2 Picture

A picture translated by the given coordinate.

transPicture :: (Picture -> Picture) -> GameAction cont -> GameAction cont

Lift a picture transformation into transformation of GameAction

defaultGameParam :: GameParam

640*480(windowed), 60fps

tick :: MonadFree GameAction m => m ()

Finalize the current frame and refresh the screen.

drawPicture :: MonadFree GameAction m => Picture -> m ()

Draw a Picture.

loadPicture :: MonadFree GameAction m => Bitmap -> m Picture

Create a Picture from Bitmap.

askInput :: MonadFree GameAction m => Key -> m Bool

Is the specified Key is pressed?

getMouseState :: MonadFree GameAction m => m MouseState

Get the mouse's state.

embedIO :: MonadFree GameAction m => IO a -> m a

Embed arbitrary IO actions into a Game monad.

bracket :: MonadFree GameAction m => Game a -> m a

Run a Game monad in a Game monad. resources (e.g. pictures) will be released when inner computation is done.