YampaSDL2.InputOutput

Input

data AppInput

Data type which stores all user inputs at the current time. You should not interact with this type directly, but use signal functions like anyKeyActive to get events.

Input Signals

mouseLeftActive :: SF AppInput (Event (V2 Double))

mouseLeftPress :: SF AppInput (Event (V2 Double))

mouseRightActive :: SF AppInput (Event (V2 Double))

mouseRightPress :: SF AppInput (Event (V2 Double))

anyKeyActive :: SF AppInput (Event [Scancode])

anyKeyPress :: SF AppInput (Event [Scancode])

quit :: SF AppInput (Event ())

Output

data AppOutput

The Main signal function needs to return an AppOutput which tells SDL what to do.

Use output to create an AppOutput

Constructors

AppOutput

Fields

• scene :: Scene

  Sets what will be drawn

• sound :: [Sound]

  Sadly not working yet

• shouldExit :: Bool

  Set if the app should exit

output :: Scene -> [Sound] -> Bool -> AppOutput

Scene

data Scene

Properties of the scene

Constructors

Scene

Fields

• cam :: Camera

  Sets the viewpoint

• objects :: [RenderObject]

  All objects that are drawn

render :: Camera -> [RenderObject] -> Scene

Camera

data Camera

Constructors

Camera

Fields

• cPos :: V2 Double

  Moves the viewpoint

• cSize :: V2 Double

  Set the size of the viewpoint, for example to zoom.

camera :: V2 Double -> V2 Double -> Camera

RenderObject

type Center = V2 Double

type Bounds = V4 Double

type Cache = MVar [(String, Dynamic)]

data RenderObject

Constructors

RO

Fields

• center :: Center

  center

• bounds :: Bounds

  rectangular bounds used for optimizations

• zIndex :: Int

  RenderObject with higher zIndex will be rendered atop ones with lower zIndex

• draw :: Cache -> Center -> Renderer -> IO ()

translate :: (Center -> Center) -> RenderObject -> RenderObject

Move a RenderObject

data ShapeColour

Used to set the colour of shapes like rectangle or circle and whether they are filled or not. This library uses Data.Colour to create colours.

Constructors

Filled (AlphaColour Double)

Unfilled (AlphaColour Double)

Instances

Eq ShapeColour

Methods

(==) :: ShapeColour -> ShapeColour -> Bool

(/=) :: ShapeColour -> ShapeColour -> Bool

Show ShapeColour

Methods

showsPrec :: Int -> ShapeColour -> ShowS

show :: ShapeColour -> String

showList :: [ShapeColour] -> ShowS

Sound

data Sound

Not implemented yet

Constructors

NotImplementedYet