affection/examples/example03.hs

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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE BangPatterns #-}
import Affection
import qualified SDL
import qualified GEGL as G
import qualified BABL as B
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import qualified Data.Map.Strict as M
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import Control.Monad (when)
import Foreign.C.Types
import System.Random (randomRIO)
import Debug.Trace
main :: IO ()
main = do
conf <- return $ AffectionConfig
{ initComponents = All
, windowTitle = "Affection: example00"
, windowConfig = SDL.defaultWindow
, preLoop = drawInit
, eventLoop = handle
, updateLoop = update
, drawLoop = draw
, loadState = load
, cleanUp = clean
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, canvasSize = Nothing
}
withAffection conf
data UserData = UserData
{ nodeGraph :: M.Map String G.GeglNode
, foreground :: G.GeglBuffer
, partsys :: ParticleSystem
}
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load :: IO UserData
load = do
traceM "loading"
root <- G.gegl_node_new
traceM "new root node"
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rect <- G.gegl_node_new_child root $ G.Operation "gegl:rectangle" $
props $ do
prop "x" (0 :: Double)
prop "y" (0 :: Double)
prop "width" (800 :: Double)
prop "height" (600 :: Double)
prop "color" $ G.RGB 0 0 0
traceM "rect"
traceM "checkerboard"
over <- G.gegl_node_new_child root G.defaultOverOperation
traceM "over"
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buffer <- G.gegl_buffer_new (Just $ G.GeglRectangle 0 0 800 600) =<<
B.babl_format (B.PixelFormat B.RGBA B.CFfloat)
sink <- G.gegl_node_new_child root $ G.Operation "gegl:copy-buffer"
[G.Property "buffer" $ G.PropertyBuffer buffer
]
traceM "buffer-sink"
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nop <- G.gegl_node_new_child root $ G.Operation "gegl:nop" []
traceM "nop"
crop <- G.gegl_node_new_child root $ G.Operation "gegl:crop"
[ G.Property "width" $ G.PropertyDouble 800
, G.Property "height" $ G.PropertyDouble 600
]
traceM "crop"
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G.gegl_node_link_many [rect, over, crop, sink]
G.gegl_node_connect_to nop "output" over "aux"
traceM "connections made"
myMap <- return $ M.fromList
[ ("root" , root)
, ("over" , over)
, ("sink" , sink)
, ("nop" , nop)
, ("crop" , crop)
]
traceM "loading complete"
return $ UserData
{ nodeGraph = myMap
, foreground = buffer
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, partsys = ParticleSystem (ParticleStorage Nothing []) nop buffer
}
drawInit :: Affection UserData ()
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drawInit = return ()
-- drawInit = do
-- UserData{..} <- getAffection
-- present (GeglRectangle 0 0 800 600) foreground True
draw :: Affection UserData ()
draw = do
traceM "drawing"
UserData{..} <- getAffection
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drawParticleSystem partsys partDraw
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process $ nodeGraph M.! "sink"
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present
(G.GeglRectangle 0 0 800 600)
foreground
True
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render Nothing Nothing
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update :: Double -> Affection UserData ()
update dt = do
traceM "updating"
ad <- get
ud <- getAffection
delta <- getDelta
traceM $ (show $ 1 / delta) ++ " FPS"
ud2 <- getAffection
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!nps <- updateParticleSystem (partsys ud2) delta partUpd
putAffection $ ud2 { partsys = nps }
handle (SDL.MouseMotionEvent dat) =
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when (SDL.ButtonLeft `elem` SDL.mouseMotionEventState dat)
$ do
ad <- get
ud <- getAffection
let (SDL.P (SDL.V2 x y)) = SDL.mouseMotionEventPos dat
vx <- liftIO $ randomRIO (-20, 20)
vy <- liftIO $ randomRIO (-20, 20)
life <- liftIO $ randomRIO (1, 5)
r <- liftIO $ randomRIO (0,1)
g <- liftIO $ randomRIO (0,1)
b <- liftIO $ randomRIO (0,1)
tempRoot <- liftIO $ G.gegl_node_new
tempOver <- liftIO $ G.gegl_node_new_child tempRoot
G.defaultOverOperation
tempRect <- liftIO $ G.gegl_node_new_child tempRoot $ G.Operation
"gegl:rectangle"
[ G.Property "x" $ G.PropertyDouble $ fromIntegral x - 10
, G.Property "y" $ G.PropertyDouble $ fromIntegral y - 10
, G.Property "width" $ G.PropertyDouble 20
, G.Property "height" $ G.PropertyDouble 20
, G.Property "color" $ G.PropertyColor $ (G.RGBA r g b 0.5)
]
liftIO $ G.gegl_node_connect_to tempRect "output" tempOver "aux"
-- traceM $ "position is: " ++ show x ++ " " ++ show y
-- traceM $ "velocity is: " ++ show vx ++ " " ++ show vy
ips <- insertParticle (partsys ud) $
Particle
{ particleTimeToLive = life
, particleCreation = elapsedTime ad
, particlePosition = (fromIntegral x, fromIntegral y)
, particleRotation = Rad 0
, particleVelocity = (vx, vy)
, particlePitchRate = Rad 0
, particleRootNode = tempRoot
, particleNodeGraph = M.fromList
[ ("root", tempRoot)
, ("over", tempOver)
, ("rect", tempRect)
]
, particleStackCont = tempOver
, particleDrawFlange = tempOver
}
putAffection $ ud
{ partsys = ips
}
-- when (not $ null $ psParts $ partsys ud) $
-- liftIO $ G.gegl_node_link
-- tempOver
-- (particleStackCont $ head $ psParts $ partsys ud)
handle (SDL.WindowClosedEvent _) = do
traceM "seeya!"
quit
handle _ =
return ()
clean :: UserData -> IO ()
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clean ud = do
G.gegl_node_drop (nodeGraph ud M.! "root")
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partUpd :: Double -> Particle -> Affection UserData Particle
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partUpd sec p = do
let !newX = (fst $ particlePosition p) + sec * (fromIntegral $ fst $ particleVelocity p)
!newY = (snd $ particlePosition p) + sec * (fromIntegral $ snd $ particleVelocity p)
liftIO $ G.gegl_node_set (particleNodeGraph p M.! "rect") $ G.Operation "gegl:rectangle"
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[ G.Property "x" $ G.PropertyDouble $ newX - 10
, G.Property "y" $ G.PropertyDouble $ newY - 10
]
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let !np = p {particlePosition = (newX, newY)}
return np
partDraw :: G.GeglBuffer -> G.GeglNode -> Particle -> Affection UserData ()
partDraw _ _ _ = return ()
-- partDraw buf node Particle{..} = do
-- present
-- (G.GeglRectangle (floor $ fst particlePosition - 10) (floor $ snd particlePosition - 10) 20 20)
-- buf
-- False
-- -- ud <- getAffection
-- -- drawRect'
-- -- particleDrawFlange
-- -- (G.RGBA 1 0 0 0.5)
-- -- (Fill)
-- -- (G.GeglRectangle ((floor $ fst particlePosition) - 10) ((floor $ snd particlePosition) -10) 20 20)
-- -- buf