new example

It's a rectangle following the mouse
This commit is contained in:
nek0 2016-12-11 12:11:58 +01:00
parent 15fdea6949
commit 40d88c4fd2
2 changed files with 153 additions and 0 deletions

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@ -94,3 +94,20 @@ executable example01
, mtl
else
buildable: False
executable example02
hs-source-dirs: examples
main-is: example02.hs
ghc-options: -threaded -Wall
default-language: Haskell2010
default-extensions: OverloadedStrings
if flag(examples)
build-depends: base
, affection
, sdl2
, gegl
, babl
, containers
, mtl
else
buildable: False

136
examples/example02.hs Normal file
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@ -0,0 +1,136 @@
{-# LANGUAGE RecordWildCards #-}
import Affection
import qualified SDL
import qualified SDL.Raw as Raw
import qualified GEGL as G
import qualified BABL as B
import qualified Data.Map.Strict as M
import Foreign.Ptr (castPtr)
import Foreign.Storable (peek)
import Foreign.C.Types
import Debug.Trace
main :: IO ()
main = do
conf <- return $ AffectionConfig
{ initComponents = All
, windowTitle = "Affection: example00"
, windowConfig = SDL.defaultWindow
, drawLoop = draw
, updateLoop = update
, loadState = load
, cleanUp = clean
}
withAffection conf
data UserData = UserData
{ nodeGraph :: M.Map String G.GeglNode
, foreground :: G.GeglBuffer
, coordinates :: Maybe (Int, Int)
}
data Particle = Particle
{ particleCoords :: (Int, Int)
, particleTTL :: Double
, particleVel :: (Int, Int)
}
load :: SDL.Surface -> IO UserData
load surface = do
traceM "loading"
root <- G.gegl_node_new
traceM "new root node"
checkerboard <- G.gegl_node_new_child root $ G.checkerboardOperation
[ G.Property "color1" $ G.PropertyColor $ G.RGBA 0.4 0.4 0.4 1
, G.Property "color2" $ G.PropertyColor $ G.RGBA 0.6 0.6 0.6 1
]
traceM "checkerboard"
let SDL.Surface rawSurfacePtr _ = surface
-- display <- G.gegl_node_new_child root $ G.Operation "dodo:sdl-surface" $
-- [ G.Property "surface" $ G.PropertyPointer $ castPtr rawSurfacePtr ]
over <- G.gegl_node_new_child root G.defaultOverOperation
traceM "over"
buffer <- G.gegl_buffer_new (G.GeglRectangle 0 0 800 600) =<<
B.babl_format (B.PixelFormat B.RGBA B.CFfloat)
bufsrc <- G.gegl_node_new_child root $ G.bufferSourceOperation
[ G.Property "buffer" $ G.PropertyBuffer buffer
]
traceM "buffer-source"
G.gegl_node_link_many [checkerboard, over]
G.gegl_node_connect_to bufsrc "output" over "aux"
traceM "connections made"
myMap <- return $ M.fromList
[ ("root" , root)
, ("over" , over)
-- , ("display" , display)
, ("background" , checkerboard)
, ("foreground" , bufsrc)
]
let roi = G.GeglRectangle 0 0 20 20
traceM "loading complete"
return $ UserData
{ nodeGraph = myMap
, foreground = buffer
, coordinates = Nothing
}
draw :: Affection UserData ()
draw = do
traceM "drawing"
AffectionData{..} <- get
let UserData{..} = userState
liftIO $ SDL.lockSurface drawSurface
pixels <- liftIO $ SDL.surfacePixels drawSurface
let SDL.Surface rawSurfacePtr _ = drawSurface
rawSurface <- liftIO $ peek rawSurfacePtr
pixelFormat <- liftIO $ peek $ Raw.surfaceFormat rawSurface
format <- liftIO $ (B.babl_format $ B.PixelFormat B.RGBA B.CFu8)
SDL.V2 (CInt rw) (CInt rh) <- SDL.surfaceDimensions drawSurface
let (w, h) = (fromIntegral rw, fromIntegral rh)
maybe (return ()) (\(x, y) -> do
liftIO $ drawRect foreground (G.RGB 1 0 0) (Line 2) (G.GeglRectangle (x - 10) (y - 10) 20 20)
) coordinates
-- liftIO $ G.gegl_node_process $ nodeGraph M.! "display"
liftIO $ G.gegl_node_blit
(nodeGraph M.! "over" :: G.GeglNode)
1
(G.GeglRectangle 0 0 w h)
format
pixels
(fromIntegral (Raw.pixelFormatBytesPerPixel pixelFormat) * w)
[G.GeglBlitDefault]
liftIO $ SDL.unlockSurface drawSurface
liftIO $ SDL.updateWindowSurface drawWindow
liftIO $ clearArea foreground (GeglRectangle 0 0 w h)
update :: Double -> AffectionState (AffectionData UserData) IO ()
update sec = do
traceM "updating"
-- liftIO $ delaySec 5
ad@AffectionData{..} <- get
let ud@UserData{..} = userState
traceM $ (show $ 1 / sec) ++ " FPS"
ev <- liftIO $ SDL.pollEvent
maybe (return ()) (\e ->
case SDL.eventPayload e of
SDL.MouseMotionEvent dat -> do
let (SDL.P (SDL.V2 x y)) = SDL.mouseMotionEventPos dat
put $ ad
{ userState = ud
{ coordinates = Just (fromIntegral x, fromIntegral y)
}
}
SDL.WindowClosedEvent _ -> do
traceM "seeya!"
put $ ad
{ quitEvent = True
}
_ ->
return ()
) ev
clean :: UserData -> IO ()
clean _ = return ()