Dyna.Gloss.Run

Run the game application.

App execution

data Run a

Monad that drives the application

Instances

Monad Run

Defined in Dyna.Gloss.Types

Methods

(>>=) :: Run a -> (a -> Run b) -> Run b

(>>) :: Run a -> Run b -> Run b

return :: a -> Run a

Functor Run

Defined in Dyna.Gloss.Types

Methods

fmap :: (a -> b) -> Run a -> Run b

(<$) :: a -> Run b -> Run a

Applicative Run

Defined in Dyna.Gloss.Types

Methods

pure :: a -> Run a

(<*>) :: Run (a -> b) -> Run a -> Run b

liftA2 :: (a -> b -> c) -> Run a -> Run b -> Run c

(*>) :: Run a -> Run b -> Run b

(<*) :: Run a -> Run b -> Run a

MonadIO Run

Defined in Dyna.Gloss.Types

Methods

liftIO :: IO a -> Run a

MonadRandom Run

Defined in Dyna.Gloss.Types

Methods

getRandomR :: Random a => (a, a) -> Run a

getRandom :: Random a => Run a

getRandomRs :: Random a => (a, a) -> Run [a]

getRandoms :: Random a => Run [a]

Frp Run

Defined in Dyna.Gloss.Types

Associated Types

type Ref Run :: Type -> Type

MonadBase IO Run

Defined in Dyna.Gloss.Types

Methods

liftBase :: IO α -> Run α

MonadBaseControl IO Run

Defined in Dyna.Gloss.Types

Associated Types

type StM Run a

Methods

liftBaseWith :: (RunInBase Run IO -> IO a) -> Run a

restoreM :: StM Run a -> Run a

type Ref Run

Defined in Dyna.Gloss.Types

type Ref Run = IORef

type StM Run a

Defined in Dyna.Gloss.Types

type StM Run a

data Spec

Initial parameters for the Game.

Constructors

Spec

Fields

• spec'display :: Display

  display settings

• spec'background :: Color

  background color to clear each frame

• spec'steps :: Int

  number of steps for simulation

defSpec :: Spec

Default settings. Runs in ullscreen mode.

runApp :: Spec -> Run (Dyn Picture) -> IO ()

Run the aplication. It accepts initial settings and the dynamic value of pictures wrapped in the Run monad.

Note that to work properly we need to compile to executable with options -O2 and -threaded. The function does not work in ghci or with runhaskell because it requires support for multiple threads.

Define the application with the Main module. Then compie it:

stack exec -- ghc -O2 -threaded dyna-gloss/examples/Ball.hs

And run the result:

	./dyna-gloss/examples/Ball

How it works? It runs the dynamic process at the background thread and every time the gloss function requests new frame it takes a snapshot of the current value of the main dynamic process which produces pictures. It's exactly what gloss simulation function needs to render it on the screen.

IO interface

mouse :: Dyn Vec

Read mouse positions. It produces dynamic of vectors. (0, 0) is a center of the screen.

mouseV :: Dyn Vec

Mouse velocity or displacement

isDrag :: MouseButton -> Dyn Bool

drag :: MouseButton -> Dyn Vec

Position of the mouse during drag, if no drag it becomes zero

dragV :: MouseButton -> Dyn Vec

Displacement on drag, if no drag it becomes zero

mouseA :: Dyn Vec

Mouse accelartion or speed of displacement

mouseRight :: Evt Vec

Event stream of clicks of the mouse right button

mouseLeft :: Evt Vec

Event stream of clicks of the mouse left button

mouseWheel :: Evt Float

Mouse wheel displacement. If positive then it goes up, if negative then it goes down.

data Click

All sorts of clicks

Constructors

Click Key KeyState Modifiers Vec

getClicks :: Evt Click

Reads generic click events

getFrames :: Evt Float

Reads frame updates. Value of the event is a time that has passed since the previous frame.

Note that if we want to use the sort of event stream as a timeline for the game or simulation we can also use time utilities from the FRP library: clock, pulse, ticks, timer.

getResize :: Evt (Int, Int)

Reads window resize events

keyUp :: Key -> Evt Modifiers

Event stream of key up actions

keyDown :: Key -> Evt Modifiers

Event stream of key down actions

charUp :: Char -> Evt Modifiers

Event stream of char press up actions

charDown :: Char -> Evt Modifiers

Event stream of char press down actions

Re-exports

data Key

Constructors

Char Char

SpecialKey SpecialKey

MouseButton MouseButton

Instances

Eq Key

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

(==) :: Key -> Key -> Bool

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

Ord Key

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

compare :: Key -> Key -> Ordering

(<) :: Key -> Key -> Bool

(<=) :: Key -> Key -> Bool

(>) :: Key -> Key -> Bool

(>=) :: Key -> Key -> Bool

max :: Key -> Key -> Key

min :: Key -> Key -> Key

Show Key

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

showsPrec :: Int -> Key -> ShowS

show :: Key -> String

showList :: [Key] -> ShowS

data SpecialKey

Constructors

KeyUnknown

KeySpace

KeyEsc

KeyF1

KeyF2

KeyF3

KeyF4

KeyF5

KeyF6

KeyF7

KeyF8

KeyF9

KeyF10

KeyF11

KeyF12

KeyF13

KeyF14

KeyF15

KeyF16

KeyF17

KeyF18

KeyF19

KeyF20

KeyF21

KeyF22

KeyF23

KeyF24

KeyF25

KeyUp

KeyDown

KeyLeft

KeyRight

KeyTab

KeyEnter

KeyBackspace

KeyInsert

KeyNumLock

KeyBegin

KeyDelete

KeyPageUp

KeyPageDown

KeyHome

KeyEnd

KeyShiftL

KeyShiftR

KeyCtrlL

KeyCtrlR

KeyAltL

KeyAltR

KeyPad0

KeyPad1

KeyPad2

KeyPad3

KeyPad4

KeyPad5

KeyPad6

KeyPad7

KeyPad8

KeyPad9

KeyPadDivide

KeyPadMultiply

KeyPadSubtract

KeyPadAdd

KeyPadDecimal

KeyPadEqual

KeyPadEnter

Instances

Eq SpecialKey

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

(==) :: SpecialKey -> SpecialKey -> Bool

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

Ord SpecialKey

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

compare :: SpecialKey -> SpecialKey -> Ordering

(<) :: SpecialKey -> SpecialKey -> Bool

(<=) :: SpecialKey -> SpecialKey -> Bool

(>) :: SpecialKey -> SpecialKey -> Bool

(>=) :: SpecialKey -> SpecialKey -> Bool

max :: SpecialKey -> SpecialKey -> SpecialKey

min :: SpecialKey -> SpecialKey -> SpecialKey

Show SpecialKey

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

showsPrec :: Int -> SpecialKey -> ShowS

show :: SpecialKey -> String

showList :: [SpecialKey] -> ShowS

data MouseButton

Constructors

LeftButton

MiddleButton

RightButton

WheelUp

WheelDown

AdditionalButton Int

Instances

Eq MouseButton

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

(==) :: MouseButton -> MouseButton -> Bool

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

Ord MouseButton

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

compare :: MouseButton -> MouseButton -> Ordering

(<) :: MouseButton -> MouseButton -> Bool

(<=) :: MouseButton -> MouseButton -> Bool

(>) :: MouseButton -> MouseButton -> Bool

(>=) :: MouseButton -> MouseButton -> Bool

max :: MouseButton -> MouseButton -> MouseButton

min :: MouseButton -> MouseButton -> MouseButton

Show MouseButton

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

showsPrec :: Int -> MouseButton -> ShowS

show :: MouseButton -> String

showList :: [MouseButton] -> ShowS

data KeyState

Constructors

Down

Up

Instances

Eq KeyState

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

(==) :: KeyState -> KeyState -> Bool

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

Ord KeyState

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

compare :: KeyState -> KeyState -> Ordering

(<) :: KeyState -> KeyState -> Bool

(<=) :: KeyState -> KeyState -> Bool

(>) :: KeyState -> KeyState -> Bool

(>=) :: KeyState -> KeyState -> Bool

max :: KeyState -> KeyState -> KeyState

min :: KeyState -> KeyState -> KeyState

Show KeyState

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

showsPrec :: Int -> KeyState -> ShowS

show :: KeyState -> String

showList :: [KeyState] -> ShowS

data Modifiers

Constructors

Modifiers

Fields

• shift :: KeyState
• ctrl :: KeyState
• alt :: KeyState

Instances

Eq Modifiers

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

(==) :: Modifiers -> Modifiers -> Bool

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

Ord Modifiers

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

compare :: Modifiers -> Modifiers -> Ordering

(<) :: Modifiers -> Modifiers -> Bool

(<=) :: Modifiers -> Modifiers -> Bool

(>) :: Modifiers -> Modifiers -> Bool

(>=) :: Modifiers -> Modifiers -> Bool

max :: Modifiers -> Modifiers -> Modifiers

min :: Modifiers -> Modifiers -> Modifiers

Show Modifiers

Defined in Graphics.Gloss.Internals.Interface.Backend.Types

Methods

showsPrec :: Int -> Modifiers -> ShowS

show :: Modifiers -> String

showList :: [Modifiers] -> ShowS