Graphics.FreeGame.Simple

The essentials of using free-game

Basic type

type Game = Free GameAction

Game is a Monad that abstracts user interfaces.

Run the game

defaultGameParam :: GameParam

640*480(windowed), 60fps

runSimple

Arguments

:: GameParam

-> world

An initial world

-> (world -> Game world)

A computation yielding new world

-> IO ()

Run a Game by the given initial state and updating function.

In the Game monad

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

Draw a Picture.

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.

quitGame :: MonadFree GameAction m => m a

Break the current computation.

tick :: MonadFree GameAction m => m ()

Finalize the current frame and refresh the screen.

untickGame :: Game a -> Game (Game a)

Run a Game as one frame.

About Picture

data Picture

A 2D Picture.

Constructors

BitmapPicture Bitmap

A Bitmap as a Picture.

Pictures [Picture]

A picture consist of some Pictures.

IOPicture (IO Picture)

A picture that may have side effects(rarely needed).

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.

loadBitmapFromFile :: FilePath -> IO Bitmap

Create a Bitmap from the given file.

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)

Drawing texts

data Font

Font object

loadFont :: FilePath -> IO Font

Create a Font from the given file.

text :: Font -> Float -> String -> Picture

Render a text by the specified Font.

Utilities

randomness :: (Random r, MonadFree GameAction m) => (r, r) -> m r

Get a given range of value.

Reexports

module Graphics.FreeGame.Input

module Graphics.FreeGame.Data.Color