Added bullet/tank collision; reduced tick count

src/CPUPlayer.hs

@@ -16,4 +16,4 @@ data CPUPlayer = CPUPlayer Micro
                  deriving (Typeable, Show)
 
 instance Player CPUPlayer where
-    playerUpdate (CPUPlayer angle) _ = (CPUPlayer (if (angle+0.1) > 180 then angle-359.08 else angle+0.02), Just angle, True, Just (-angle), False)
+    playerUpdate (CPUPlayer angle) _ = (CPUPlayer (if (angle+0.2) > 180 then angle-359.8 else angle+0.2), Just angle, True, Just (-angle), False)

src/Collision.hs

@@ -1,5 +1,6 @@
 module Collision ( collisionTankBorder
                  , collisionBulletBullet
+                 , collisionBulletTank
                  ) where
 
 import Tank
@@ -49,3 +50,23 @@ collisionBulletBullet :: (Bullet, Bullet) -> (Bullet, Bullet) -> Bool
 collisionBulletBullet (b1, b1') (b2, b2') = distancesq < (bulletDiameter^2)
     where
       distancesq = (bulletX b1' - bulletX b2')^2 + (bulletY b1' - bulletY b2')^2
+
+collisionBulletTank :: (Bullet, Bullet) -> (Tank, Tank) -> Bool
+collisionBulletTank (b, b') (tank, tank') = (not ((between bx minx maxx) && (between by miny maxy))) && ((between bx' minx maxx) && (between by' miny maxy))
+    where
+      between x a b = x >= a && x <= b
+      
+      dir t = (fromRational . toRational . tankDir $ t)*pi/180
+      cosd t = fromRational (round ((cos $ dir t)*1000000)%1000000)
+      sind t = fromRational (round ((sin $ dir t)*1000000)%1000000)
+      
+      rotp t (x, y) = ((cosd t)*x + (sind t)*y, -(sind t)*x + (cosd t)*y)
+      transp t (x, y) = (x - tankX t, y - tankY t)
+      
+      (bx, by) = (rotp tank) . (transp tank) $ (bulletX b, bulletY b)
+      (bx', by') = (rotp tank') . (transp tank') $ (bulletX b', bulletY b')
+      
+      minx = -tankLength/2
+      maxx = tankLength/2
+      miny = -tankWidth/2
+      maxy = tankWidth/2

src/Game.hs

@@ -23,7 +23,7 @@ data Bullet = Bullet
     , bulletSpeed  :: !Micro
     , bulletBouncesLeft :: !Int
     , bulletTank   :: !Int
-    } deriving Show
+    } deriving (Eq, Show)
 
 data GameState = GameState
     { level    :: !Level

src/HTanks.hs

@@ -61,11 +61,11 @@ mainLoop = do
        liftIO $ threadDelay $ truncate $ 1e6*(minFrameTime - drender)
   
   currenttime <- liftIO getCurrentTime
-  let d = round $ 1e3*(diffUTCTime currenttime t)
+  let d = round $ 1e2*(diffUTCTime currenttime t)
   
   replicateM_ d simulationStep
   
-  let newtime = addUTCTime ((1e-3)*(fromIntegral d)) t
+  let newtime = addUTCTime ((1e-2)*(fromIntegral d)) t
   
   modify $ \state -> state {time = newtime}
   

src/Simulation.hs

@@ -10,6 +10,7 @@ import Tank
 
 import Control.Monad.State
 import Data.Fixed
+import Data.List
 import Data.Maybe
 import Data.Ratio
 
@@ -17,7 +18,7 @@ import Data.Ratio
 updateAngle :: Micro -> State Tank ()
 updateAngle angle = do
   oldangle <- gets tankDir
-  tspeed <- gets tankTurnspeed >>= return . (/1000)
+  tspeed <- liftM (/100) $ gets tankTurnspeed
   
   let diff = angle - oldangle
   let diff360 = if (diff > 180)
@@ -65,8 +66,8 @@ updateTank game angle move aangle = do
     
     when (isNothing angle || (isJust angle && (tdir == fromJust angle)) || moved) $ do
                    let anglej = (fromRational . toRational $ tdir)*pi/180
-                       dx = tspeed * fromRational (round ((cos anglej)*1000)%1000000)
+                       dx = tspeed * fromRational (round ((cos anglej)*1000)%100000)
-                       dy = tspeed * fromRational (round ((sin anglej)*1000)%1000000)
+                       dy = tspeed * fromRational (round ((sin anglej)*1000)%100000)
                    
                    put tank {tankX = dx + tankX tank, tankY = dy + tankY tank, tankMoving = True}
   
@@ -83,8 +84,8 @@ updateBullet game = do
   bullet <- get
   let angle = (fromRational . toRational . bulletDir $ bullet)*pi/180
       speed = bulletSpeed bullet
-      dx = speed * fromRational (round ((cos angle)*1000)%1000000)
+      dx = speed * fromRational (round ((cos angle)*1000)%100000)
-      dy = speed * fromRational (round ((sin angle)*1000)%1000000)
+      dy = speed * fromRational (round ((sin angle)*1000)%100000)
       x = dx + bulletX bullet
       y = dy + bulletY bullet
       lw = fromIntegral . levelWidth . level $ game
@@ -123,8 +124,12 @@ simulationStep = do
   lift $ modify $ \state ->
       let thebullets = map (runState $ updateBullet state) $ bullets state
           leftbullets = collideBullets $ zipWith (\(left, bullet') bullet -> (left, bullet, bullet')) thebullets $ bullets state
-          thetanks = map (\(tank, n) -> tank {tankBulletsLeft = (tankBulletsLeft tank) + (countLostTankBullets n leftbullets)}) $ zip newtanks [0..]
+          bt = hitBullets $ liftM2 (\(b, (_, b')) (t, t') -> (b, b', t, t')) (zip (bullets state) leftbullets) (zip (tanks state) newtanks)
-      in state {tanks = thetanks, bullets = newbullets ++ (map snd . filter fst $ leftbullets)}
+          leftbullets2 = map (\(left, bullet) -> (left && (all (\(c, b, _) -> (b /= bullet) || (not c)) bt), bullet)) leftbullets
+          
+          thetanks = map (\(tank, n) -> tank {tankBulletsLeft = (tankBulletsLeft tank) + (countLostTankBullets n leftbullets2)}) $ zip newtanks [0..]
+          
+      in state {tanks = thetanks, bullets = newbullets ++ (map snd . filter fst $ leftbullets2)}
   
     where
       collideBullets [] = []
@@ -135,6 +140,10 @@ simulationStep = do
                                             left = map (\(left, c, b, b') -> (left && not c, b, b')) $ cs
                                         in (collided, left)
       
+      hitBullets :: [(Bullet, Bullet, Tank, Tank)] -> [(Bool, Bullet, Tank)]
+      hitBullets [] = []
+      hitBullets ((b, b', t, t'):xs) = (collisionBulletTank (b, b') (t, t'), b', t'):(hitBullets xs)
+      
       updateTank' game (player, tank) = let (p, angle, move, aangle, shoot) = playerUpdate player tank
                                             t = execState (updateTank game angle move aangle) tank
                                         in (p, t, shoot)