92 lines
2.2 KiB
Haskell
92 lines
2.2 KiB
Haskell
{-# LANGUAGE PatternGuards, GeneralizedNewtypeDeriving #-}
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import Game
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import Level
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import Render
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import Tank
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import GLDriver
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import GLX
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import Control.Concurrent (threadDelay)
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import Control.Monad.State
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import Data.Maybe
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import Data.Time.Clock
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data MainState = MainState
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{ driver :: !SomeDriver
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, time :: !UTCTime
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}
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newtype MainT m a = MainT (StateT MainState m a)
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deriving (Monad, MonadState MainState, MonadIO, MonadTrans)
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type Main = MainT Game
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runMain :: MainState -> Main a -> Game (a, MainState)
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runMain st (MainT a) = runStateT a st
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main :: IO ()
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main = do
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gl <- initGL glxDriver
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when (initialized gl) $ do
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currentTime <- getCurrentTime
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let mainState = MainState {driver = SomeDriver gl, time = currentTime}
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gameState = GameState {level = testLevel, tanks = [Tank 0.0 0.0 0]}
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setup 800 600
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runGame gameState $ runMain mainState $ mainLoop
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deinitGL gl
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minFrameTime :: NominalDiffTime
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minFrameTime = 0.01
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mainLoop :: Main ()
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mainLoop = do
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gl <- gets driver
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t <- gets time
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run <- liftIO $ handleEvents gl
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lift render
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liftIO $ swapBuffers gl
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rtime <- liftIO getCurrentTime
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let drender = diffUTCTime rtime t
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when (drender < minFrameTime) $
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liftIO $ threadDelay $ truncate $ 1e6*(minFrameTime - drender)
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currenttime <- liftIO getCurrentTime
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let d = round $ 1e3*(diffUTCTime currenttime t)
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lift $ modify $ \state -> state {tanks = (Tank ((posx . head . tanks $ state)+(0.0001* fromIntegral d)) 0.0 0):(tail . tanks $ state)}
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liftIO $ print $ d
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let newtime = addUTCTime ((1e-3)*(fromIntegral d)) t
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modify $ \state -> state {time = newtime}
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when run $ mainLoop
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handleEvents :: Driver a => a -> IO Bool
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handleEvents gl = do
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event <- nextEvent gl
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if (isJust event)
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then
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handleEvent $ fromJust event
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else
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return True
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handleEvent :: SomeEvent -> IO Bool
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handleEvent ev
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| Just (ResizeEvent w h) <- fromEvent ev = do
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resize w h
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return True
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| Just QuitEvent <- fromEvent ev = return False
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| otherwise = return True
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