Graphics.FreeGame.Base

Abstract structures that represents user interfaces

Types

type Game = Free GameAction

Game is a Monad that abstracts user interfaces.

data GameAction a

A base for Game monad.

Constructors

Tick a

EmbedIO (IO a)

Bracket (Game a)

DrawPicture Picture a

GetButtonState Button (Bool -> a)

GetMousePosition (Vec2 -> a)

GetMouseWheel (Int -> a)

GetGameParam (GameParam -> a)

QuitGame

Instances

Functor GameAction

MonadIO Game

Basic operations

tick :: MonadFree GameAction m => m ()

Finalize the current frame and refresh the screen.

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.

quitGame :: MonadFree GameAction m => m Void

Break the current computation.

Pictures

data Vec2

Constructors

Vec2 !Float !Float

Instances

Read Vec2

Show Vec2

Storable Vec2

Random Vec2

AbelianGroup Vec2

Vector Vec2

DotProd Vec2

Pointwise Vec2

Dimension Vec2

LeftModule Mat2 Vec2

RightModule Vec2 Mat2

UnitVector Vec2 Normal2

HasCoordinates Vec2 Float

HasCoordinates Mat2 Vec2

Extend Vec2 Vec3

Extend Vec2 Vec4

Diagonal Vec2 Mat2

Tensor Mat2 Vec2

Projective Vec2 Mat2 Ortho2 Mat3 Proj3

Determinant (Vec2, Vec2)

data Color

A color that has red, green, blue, alpha as its component.

Constructors

Color Float Float Float Float

Instances

Eq Color

Ord Color

Show Color

IsString Color

data Picture

A 2D Picture.

Constructors

Bitmap Bitmap

A Bitmap as a Picture.

BitmapPicture Bitmap

Deprecated: use Bitmap instead

Deprecated synonym for Bitmap.

Pictures [Picture]

A picture consist of some Pictures.

PictureWithFinalizer (FinalizerT IO Picture)

A picture that may have side effects(for internal use).

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.

Colored Color Picture

Colored picture.

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

Lift a picture transformation into transformation of GameAction

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

Draw a Picture.

Inputs

getButtonState :: MonadFree GameAction m => Button -> m Bool

Is the specified Button is pressed?

getMousePosition :: MonadFree GameAction m => m Vec2

getMouseWheel :: MonadFree GameAction m => m Int

Settings

data GameParam

Parameters of the application.

Constructors

GameParam

Fields

framePerSecond :: Int

windowSize :: (Int, Int)

windowTitle :: String

windowed :: Bool

cursorVisible :: Bool

clearColor :: Color

windowOrigin :: Vec2

Instances

Show GameParam

defaultGameParam :: GameParam

640*480(windowed), 60fps

getCurrentGameParam :: MonadFree GameAction m => m GameParam

Get the game params that apply to the currently running game.

Deprecated

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

Deprecated: use getButtonState instead.

Deprecated synonym for getButtonState.

getMouseState :: MonadFree GameAction m => m MouseState

Deprecated: use getMousePosition and getMouseWheel instead.

Yields the mouse's state.