htanks/Game.hs

{-# LANGUAGE GeneralizedNewtypeDeriving #-}

module Game ( Tank(..)
            , Shoot(..)
            , GameState(..)
            , Game
            , runGame
            ) where

import Level
import Texture

import Control.Monad
import Control.Monad.State
import Data.Fixed
import qualified Data.Map as M


data Tank = Tank
          { posx  :: !Micro
          , posy  :: !Micro
          , dir   :: !Micro
          , aim   :: !Micro
          , speed :: !Micro
          , turnspeed :: !Micro
          , moving :: !Bool
          , tankShootSpeed :: !Micro
          , tankShootBounces :: !Int
          } deriving Show

data Shoot = Shoot
    { shootX   :: !Micro
    , shootY   :: !Micro
    , shootDir :: !Micro
    , shootSpeed :: !Micro
    , bouncesLeft :: !Int
    } deriving Show

data GameState = GameState
    { level    :: !Level
    , tanks    :: ![Tank]
    , shoots   :: ![Shoot]
    , textures :: !(M.Map Texture TextureObject)
    } deriving (Show)

newtype Game a = Game (StateT GameState IO a)
    deriving (Monad, MonadIO, MonadState GameState)

runGame :: GameState -> Game a -> IO (a, GameState)
runGame st (Game a) = runStateT a st