Fix bee targeting fail across wrap world edge
Previously, the bee always aimed for the light area, no matter where you actually put the target. It also got confused whenever it flew across the wrap world edge.
How the bee works now:
1) The placed bee target is *not* recalculated when it was placed in the "gray" part of the wrap world edge. This allows for more fine-tuning.
1a) Place target in light area: bee aims for target light area
1b) Place target in gray area: bee aims for target, but flies to gray area first
2) Bee target is recalculated whenever bee passes the wrap world edge.
{-
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\-}
{-# LANGUAGE BangPatterns, GeneralizedNewtypeDeriving #-}
module Store(
ElemIndex(),
MStore(),
IStore(),
newStore,
addElem,
removeElem,
readElem,
writeElem,
modifyElem,
elemExists,
firstIndex,
indicesM,
withIStore,
withIStore2,
(!),
indices
) where
import qualified Data.IntSet as IntSet
import qualified Data.Vector as V
import qualified Data.Vector.Mutable as MV
import Data.IORef
import Control.Monad
import Control.DeepSeq
newtype ElemIndex = ElemIndex Int
deriving (Eq, Show, Read, Ord, NFData)
newtype MStore e = MStore (IORef (IntSet.IntSet, IntSet.IntSet, MV.IOVector e))
newtype IStore e = IStore (IntSet.IntSet, V.Vector e)
firstIndex :: ElemIndex
firstIndex = ElemIndex 0
-- MStore code
initialSize :: Int
initialSize = 16
growFunc :: Int -> Int
growFunc a = a * 3 `div` 2
truncFunc :: Int -> Int
truncFunc a | a > growFunc initialSize = (a `div` 2)
| otherwise = a
newStore :: IO (MStore e)
newStore = do
newar <- MV.new initialSize
new <- newIORef (IntSet.empty, IntSet.fromAscList [0..initialSize - 1], newar)
return (MStore new)
growStore :: MStore e -> IO ()
growStore (MStore ref) = do
(busyElems, freeElems, arr) <- readIORef ref
let oldSize = MV.length arr
let newSize = growFunc oldSize
newArr <- MV.grow arr (newSize - oldSize)
writeIORef ref (busyElems, freeElems `IntSet.union` IntSet.fromAscList [oldSize .. newSize-1], newArr)
growIfNeeded :: MStore e -> IO ()
growIfNeeded m@(MStore ref) = do
(_, freeElems, _) <- readIORef ref
when (IntSet.null freeElems) $ growStore m
truncateIfNeeded :: MStore e -> IO ()
truncateIfNeeded (MStore ref) = do
(busyElems, _, arr) <- readIORef ref
let oldSize = MV.length arr
let newSize = truncFunc oldSize
when (newSize < oldSize && (not $ IntSet.null busyElems) && IntSet.findMax busyElems < newSize) $ do
writeIORef ref (busyElems, IntSet.fromAscList [0..newSize - 1] `IntSet.difference` busyElems, MV.take newSize arr)
addElem :: MStore e -> e -> IO ElemIndex
addElem m@(MStore ref) element = do
growIfNeeded m
(busyElems, freeElems, arr) <- readIORef ref
let (!n, freeElems') = IntSet.deleteFindMin freeElems
MV.write arr n element
writeIORef ref (IntSet.insert n busyElems, freeElems', arr)
return $ ElemIndex n
removeElem :: MStore e -> ElemIndex -> IO ()
removeElem m@(MStore ref) (ElemIndex n) = do
(busyElems, freeElems, arr) <- readIORef ref
MV.write arr n (error $ "Store: no element " ++ show n)
writeIORef ref (IntSet.delete n busyElems, IntSet.insert n freeElems, arr)
truncateIfNeeded m
readElem :: MStore e -> ElemIndex -> IO e
readElem (MStore ref) (ElemIndex n) = readIORef ref >>= \(_, _, arr) -> MV.read arr n
writeElem :: MStore e -> ElemIndex -> e -> IO ()
writeElem (MStore ref) (ElemIndex n) el = readIORef ref >>= \(_, _, arr) -> MV.write arr n el
modifyElem :: MStore e -> (e -> e) -> ElemIndex -> IO ()
modifyElem (MStore ref) f (ElemIndex n) = do
(_, _, arr) <- readIORef ref
MV.read arr n >>= MV.write arr n . f
elemExists :: MStore e -> ElemIndex -> IO Bool
elemExists (MStore ref) (ElemIndex n) = do
(_, !free, _) <- readIORef ref
return $ n `IntSet.notMember` free
indicesM :: MStore e -> IO [ElemIndex]
indicesM (MStore ref) = do
(!busy, _, _) <- readIORef ref
return $ map ElemIndex $ IntSet.toList busy
-- A way to see MStore elements in pure code via IStore
m2i :: MStore e -> IO (IStore e)
m2i (MStore ref) = do
(a, _, c') <- readIORef ref
c <- V.unsafeFreeze c'
return $ IStore (a, c)
i2m :: MStore e -> IStore e -> IO ()
i2m (MStore ref) (IStore (_, arr)) = do
(b, e, _) <- readIORef ref
a <- V.unsafeThaw arr
writeIORef ref (b, e, a)
withIStore :: MStore e -> (IStore e -> a) -> IO a
withIStore m f = do
i <- m2i m
let res = f i
res `seq` i2m m i
return res
withIStore2 :: MStore e1 -> MStore e2 -> (IStore e1 -> IStore e2 -> a) -> IO a
withIStore2 m1 m2 f = do
i1 <- m2i m1
i2 <- m2i m2
let res = f i1 i2
res `seq` i2m m1 i1
i2m m2 i2
return res
-- IStore code
(!) :: IStore e -> ElemIndex -> e
(!) (IStore (_, arr)) (ElemIndex i) = (V.!) arr i
indices :: IStore e -> [ElemIndex]
indices (IStore (busy, _)) = map ElemIndex $ IntSet.toList busy