-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | Animation for sprites
--   
--   Prototypical sprite animation with type-safety.
@package animate
@version 0.0.0

module Data.Animate

-- | Avoided newtype wrapper for convenience (tentative)
type Seconds = Float

-- | Type aliased seconds (tentative)
type DeltaSeconds = Seconds
data Frame loc
Frame :: loc -> Seconds -> Frame loc

-- | Type safe animation set. Use an sum type with an <a>Enum</a> and
--   <a>Bounded</a> instance for the animation <tt>a</tt>.
data Animations a loc

-- | Generate animations given each constructor
animations :: (Enum a, Bounded a) => (a -> [Frame loc]) -> Animations a loc

-- | Lookup the frames of an animation
framesByAnimation :: Enum a => Animations a loc -> a -> Vector (Frame loc)
data Loop

-- | Never stop looping. Animation can never be completed.
LoopForever :: Loop

-- | Count down loops to below zero. 0 = no loop. 1 = one loop. 2 = two
--   loops. etc.
LoopCount :: Int -> Loop

-- | State for progression through an animation
data Position a
Position :: a -> Int -> Seconds -> Loop -> Position a

-- | You can ignore. An intermediate type for <a>stepAnimation</a> to judge
--   how to increment the current frame.
data FrameStep

-- | New counter to compare against the frame's delay.
FrameStepCounter :: Seconds -> FrameStep

-- | How much delta to carry over into the next frame.
FrameStepDelta :: DeltaSeconds -> FrameStep

-- | Intermediate function for how a frame should be step through.
stepFrame :: Frame loc -> Position a -> DeltaSeconds -> FrameStep

-- | Step through the animation resulting in a new position.
stepAnimation :: Enum a => Animations a loc -> Position a -> DeltaSeconds -> Position a

-- | The animation has finished all its frames. Useful for signalling into
--   switching to another animation. With a LoopForever, the animation will
--   never be completed.
isAnimationComplete :: Enum a => Animations a loc -> Position a -> Bool

-- | Simple function diff'ing the position for loop change (tentative)
positionHasLooped :: Position a -> Position a -> Bool
instance GHC.Classes.Eq Data.Animate.FrameStep
instance GHC.Show.Show Data.Animate.FrameStep
instance GHC.Classes.Eq a => GHC.Classes.Eq (Data.Animate.Position a)
instance GHC.Show.Show a => GHC.Show.Show (Data.Animate.Position a)
instance GHC.Classes.Eq Data.Animate.Loop
instance GHC.Show.Show Data.Animate.Loop
instance GHC.Classes.Eq loc => GHC.Classes.Eq (Data.Animate.Animations a loc)
instance GHC.Show.Show loc => GHC.Show.Show (Data.Animate.Animations a loc)
instance GHC.Classes.Eq loc => GHC.Classes.Eq (Data.Animate.Frame loc)
instance GHC.Show.Show loc => GHC.Show.Show (Data.Animate.Frame loc)