1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
module Simulation ( simulationStep
) where
import Game
import Level
import MainLoop
import Player
import Control.Monad.State
import Data.Fixed
import Data.Maybe
import Data.Ratio
updateAngle :: Micro -> State Tank ()
updateAngle angle = do
oldangle <- gets tankDir
tspeed <- gets tankTurnspeed >>= return . (/1000)
let diff = angle - oldangle
let diff360 = if (diff > 180)
then (diff-360)
else if (diff <= -180)
then (diff+360)
else diff
let (diff180, angle180) = if (diff360 > 90)
then (diff360-180, oldangle+180)
else if (diff360 <= -90)
then (diff360+180, oldangle-180)
else (diff360, oldangle)
let turn = if (diff180 > tspeed)
then tspeed
else if (diff180 < -tspeed)
then (-tspeed)
else diff180
let newangle = angle180 + turn
let newangle180 = if (newangle > 180)
then (newangle-360)
else if (newangle <= -180)
then (newangle+360)
else newangle
modify $ \tank -> tank {tankDir = newangle180}
updateTank :: Maybe Micro -> Bool -> Maybe Micro -> State Tank ()
updateTank angle move aangle = do
when (isJust angle) $
updateAngle $ fromJust angle
when (isJust aangle) $
modify $ \tank -> tank {tankAim = fromJust aangle}
when move $ do
tdir <- gets tankDir
tspeed <- gets tankSpeed
moved <- gets tankMoving
when (isNothing angle || (isJust angle && (tdir == fromJust angle)) || moved) $ do
let anglej = (fromRational . toRational $ tdir)*pi/180
x = tspeed * fromRational (round ((cos anglej)*1000)%1000000)
y = tspeed * fromRational (round ((sin anglej)*1000)%1000000)
modify $ \tank -> tank {tankX = x + tankX tank, tankY = y + tankY tank, tankMoving = True}
when (not move) $ do
modify $ \tank -> tank {tankMoving = False}
updateBullet :: GameState -> State Bullet Bool
updateBullet game = do
bullet <- get
let angle = (fromRational . toRational . bulletDir $ bullet)*pi/180
speed = bulletSpeed bullet
dx = speed * fromRational (round ((cos angle)*1000)%1000000)
dy = speed * fromRational (round ((sin angle)*1000)%1000000)
x = dx + bulletX bullet
y = dy + bulletY bullet
lw = fromIntegral . levelWidth . level $ game
lh = fromIntegral . levelHeight . level $ game
dir = bulletDir bullet
bounces = bulletBouncesLeft bullet
(newx, dir2, bounces2) = if x < 0 then (-x, (signum dir)*180 - dir, bounces-1) else if x > lw then (2*lw-x, (signum dir)*180 - dir, bounces-1) else (x, dir, bounces)
(newy, dir3, bounces3) = if y < 0 then (-y, -dir2, bounces2-1) else if y > lh then (2*lh-y, -dir2, bounces2-1) else (y, dir2, bounces2)
put bullet {bulletX = newx, bulletY = newy, bulletDir = dir3, bulletBouncesLeft = bounces3}
return (bounces3 >= 0)
simulationStep :: Main ()
simulationStep = do
oldplayers <- gets players
oldtanks <- lift $ gets tanks
let (p, t, s) = unzip3 $ map updateTank' $ zip oldplayers oldtanks
ts = zip3 t s [0..]
shootingtanks = map (\(tank, _, n) -> (tank, n)) $ filter (\(tank, shoot, _) -> shoot && (tankBulletsLeft tank) > 0) $ ts
newtanks = map (\(tank, shoot, _) -> if (shoot && (tankBulletsLeft tank) > 0) then tank {tankBulletsLeft = (tankBulletsLeft tank) - 1} else tank) $ ts
newbullets = map (\(tank, n) -> Bullet
{ bulletX = tankX tank
, bulletY = tankY tank
, bulletDir = tankAim tank
, bulletSpeed = tankBulletSpeed tank
, bulletBouncesLeft = tankBulletBounces tank
, bulletTank = n
}) shootingtanks
modify $ \state -> state {players = p}
lift $ modify $ \state ->
let thebullets = map (runState $ updateBullet state) $ newbullets ++ bullets state
thetanks = map (\(tank, n) -> tank {tankBulletsLeft = (tankBulletsLeft tank) + (countLostTankBullets n thebullets)}) $ zip newtanks [0..]
in state {tanks = thetanks, bullets = map snd . filter fst $ thebullets}
where
updateTank' (player, tank) = let (p, angle, move, aangle, bullet) = playerUpdate player tank
t = execState (updateTank angle move aangle) tank
in (p, t, bullet)
countLostTankBullets n (x:xs) = (if ((not . fst $ x) && (n == (bulletTank . snd $ x))) then 1 else 0) + (countLostTankBullets n xs)
countLostTankBullets n [] = 0
|
