41 lines
1.2 KiB
Haskell
41 lines
1.2 KiB
Haskell
module Collision ( collisionTankBorder
|
|
) where
|
|
|
|
import Game
|
|
|
|
import Data.Fixed
|
|
import Data.Ratio
|
|
|
|
tankWidth :: Micro
|
|
tankWidth = 0.95
|
|
|
|
tankLength :: Micro
|
|
tankLength = 0.95
|
|
|
|
collisionTankBorder :: Micro -> Micro -> Tank -> Tank
|
|
collisionTankBorder lw lh tank = tank {tankX = newx, tankY = newy}
|
|
where
|
|
dir = (fromRational . toRational . tankDir $ tank)*pi/180
|
|
cosd = fromRational (round ((cos dir)*1000000)%1000000)
|
|
sind = fromRational (round ((sin dir)*1000000)%1000000)
|
|
|
|
points = [ (tankLength/2, tankWidth/2)
|
|
, (-tankLength/2, tankWidth/2)
|
|
, (-tankLength/2, -tankWidth/2)
|
|
, (tankLength/2, -tankWidth/2)
|
|
]
|
|
|
|
rotp (x, y) = (cosd*x - sind*y, sind*x + cosd*y)
|
|
transp (x, y) = (x + tankX tank, y + tankY tank)
|
|
|
|
pointst = map (transp . rotp) points
|
|
minx = minimum $ map fst pointst
|
|
maxx = maximum $ map fst pointst
|
|
miny = minimum $ map snd pointst
|
|
maxy = maximum $ map snd pointst
|
|
|
|
dx = if minx < 0 then (-minx) else if maxx > lw then (-maxx+lw) else 0
|
|
dy = if miny < 0 then (-miny) else if maxy > lh then (-maxy+lh) else 0
|
|
|
|
newx = (tankX tank) + dx
|
|
newy = (tankY tank) + dy
|