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{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedLabels #-}
{-# LANGUAGE PatternSynonyms #-}
module MeshSketch where
import Control.Monad
import qualified Data.Aeson as JSON
import qualified Data.ByteString as SB
import Data.Coerce
import Data.Functor
import Data.IORef
import Foreign.C.Types
import GI.Gdk
import GI.GObject.Functions
import GI.Gtk hiding (IsWindow,windowFullscreen,windowUnfullscreen)
import Numeric.LinearAlgebra
import LambdaCube.GL as LC
import LambdaCube.IR
import System.IO.Error
import LambdaCube.Gtk
import CubeMap
data MeshMaker = MeshMaker
{ mmWidget :: GLArea
, mmRealized :: IORef (Maybe State)
}
data Camera = Camera
{ camHeightAngle :: Float
, camTarget :: Vector Float
, camDirection :: Vector Float
, camDistance :: Float
, camWidth :: Float
, camHeight :: Float
, camWorldToScreen :: Maybe (Matrix Float)
, camScreenToWorld :: Maybe (Matrix Float)
}
data State = State
{ stCamera :: IORef Camera
, stSkyboxes :: Skyboxes
, stSkybox :: IORef Int
, stFullscreen :: IO ()
, stPipeline :: Pipeline
, stSchema :: PipelineSchema
, stStorage :: GLStorage
, stRenderer :: GLRenderer
}
initCamera :: Camera
initCamera = Camera
{ camHeightAngle = pi/6
, camTarget = fromList [0,0,0]
, camDirection = fromList [0,0,-1]
, camDistance = 10
, camWidth = 0
, camHeight = 0
, camWorldToScreen = Nothing
, camScreenToWorld = Nothing
}
new :: IO GLArea
new = do
w <- gLAreaNew
ref <- newIORef Nothing
let mm = MeshMaker w ref
-- _ <- on w #createContext $ onCreateContext mm
_ <- on w #realize $ onRealize mm
_ <- on w #unrealize $ onUnrealize mm
-- _ <- on w #destroy $ onDestroy mm
return w
loadPipeline :: IO (Either String (PipelineSchema,Pipeline))
loadPipeline = do
pipelineDesc <- do
maybe (Left "Unable to parse meshsketch.json") Right . JSON.decodeStrict <$> SB.readFile "meshsketch.json"
`catchIOError` \e -> return $ Left (show e)
-- setup render data
let inputSchema = makeSchema $ do
defObjectArray "skypoints" Points $ do
"position" @: Attribute_V3F
return $ (,) inputSchema <$> pipelineDesc
onRealize :: MeshMaker -> IO ()
onRealize mm@(MeshMaker w ref) = do
putStrLn "realize!"
readIORef ref >>= \case
Just st -> onUnrealize mm -- Shouldn't happen.
Nothing -> return ()
set w [ #canFocus := True ] -- For keyboard events.
widgetAddEvents w
[ EventMaskPointerMotionMask
, EventMaskButtonPressMask
, EventMaskButtonReleaseMask
, EventMaskTouchMask
, EventMaskScrollMask
, EventMaskKeyPressMask -- , EventMaskKeyReleaseMask
]
Right (schema,pipeline) <- loadPipeline
gLAreaMakeCurrent w
storage <- allocStorage schema
-- upload state
renderer <- allocRenderer pipeline
compat <- setStorage renderer storage -- check schema compatibility
cam <- newIORef initCamera
skyboxes <- loadSkyboxes
skybox <- newIORef 0
Just pwidget <- get w #parent
Just parent <- get pwidget #window
toggle <- mkFullscreenToggle parent
let st = State
{ stCamera = cam
, stSkyboxes = skyboxes
, stSkybox = skybox
, stFullscreen = toggle
, stPipeline = pipeline
, stSchema = schema
, stStorage = storage
, stRenderer = renderer
}
_ <- on w #event $ onEvent w st
_ <- on w #render $ onRender w st
writeIORef ref $ Just st
onUnrealize :: MeshMaker -> IO ()
onUnrealize (MeshMaker w ref) = do
putStrLn "unrealize!"
readIORef ref >>= \case
Just st -> do
-- signalHandlerDisconnect w (sigRender st)
-- signalHandlerDisconnect w (sigEvent st)
return ()
Nothing -> return () -- Shouldn't happen.
writeIORef ref Nothing
onRender :: w -> State -> GLContext -> IO Bool
onRender w st gl = do
putStrLn "render"
r <- fixupRenderTarget (stRenderer st)
-- lcSetUniforms lc gl s x
LC.renderFrame r
return True
onEvent :: w -> State -> Event -> IO Bool
onEvent w st ev = do
msrc <- eventGetSourceDevice ev
inputSource <- forM msrc $ \src -> do
src <- get src #inputSource
return src
etype <- get ev #type
-- putStrLn $ "onEvent! " ++ show (etype,inputSource)
let put x = putStrLn (show inputSource ++ " " ++ show x)
case etype of
EventTypeMotionNotify -> do
mev <- get ev #motion
x <- get mev #x
y <- get mev #y
put (x,y)
return ()
EventTypeScroll -> do
sev <- get ev #scroll
d <- get sev #direction
put d
return ()
EventTypeKeyPress -> do
kev <- get ev #key
val <- get kev #keyval <&> \k -> if k > 0x5A then k - 0x20 else k
case val of
KEY_N -> do
modifyIORef' (stSkybox st) $ \n -> (n + 1) `mod` (skyboxCount $ stSkyboxes st)
idx <- readIORef (stSkybox st)
put (skyboxNames (stSkyboxes st) !! idx)
return ()
KEY_F -> do
put 'F'
stFullscreen st
_ -> return ()
e -> return ()
return False
mkFullscreenToggle :: IsWindow a => a -> IO (IO ())
mkFullscreenToggle w = do
full <- newIORef False
return $ do
b <- atomicModifyIORef' full $ \b -> (not b, not b)
if b then windowFullscreen w
else windowUnfullscreen w
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