67 lines
No EOL
2.2 KiB
Haskell
67 lines
No EOL
2.2 KiB
Haskell
module Collision ( collisionTankBorder
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, collisionBulletBullet
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, collisionBulletTank
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) where
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import Tank
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import Game
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import Transformable
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import qualified Vector as V
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import Data.VectorSpace
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tankWidth :: Coord
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tankWidth = 0.4
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tankLength :: Coord
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tankLength = 0.95
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bulletDiameter :: Coord
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bulletDiameter = 0.05
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collisionTankBorder :: Coord -> Coord -> Tank -> Tank
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collisionTankBorder lw lh tank = (translate dx dy) >< tank
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where
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corners = [ V.Vector (tankLength/2) (tankWidth/2)
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, V.Vector (-tankLength/2) (tankWidth/2)
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, V.Vector (-tankLength/2) (-tankWidth/2)
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, V.Vector (tankLength/2) (-tankWidth/2)
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]
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rotp v = V.rotateV (tankDir tank) >< v
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transp v = V.translateV v >< tankPos tank
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points = map (transp . rotp) corners
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minx = minimum $ map V.vertexX points
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maxx = maximum $ map V.vertexX points
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miny = minimum $ map V.vertexY points
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maxy = maximum $ map V.vertexY points
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dx = if minx < 0 then (-minx) else if maxx > lw then (-maxx+lw) else 0
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dy = if miny < 0 then (-miny) else if maxy > lh then (-maxy+lh) else 0
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collisionBulletBullet :: (Bullet, Bullet) -> (Bullet, Bullet) -> Bool
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collisionBulletBullet (b1, b1') (b2, b2') = distancesq < (bulletDiameter^2)
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where
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distancesq = (bulletX b1' - bulletX b2')^2 + (bulletY b1' - bulletY b2')^2
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collisionBulletTank :: (Bullet, Bullet) -> (Tank, Tank) -> Bool
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collisionBulletTank (b, b') (tank, tank') = (not ((between bx minx maxx) && (between by miny maxy))) && ((between bx' minx maxx) && (between by' miny maxy))
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where
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between x a b = x >= a && x <= b
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rotp t v = V.rotateV' (tankDir t) >< v
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transp t v = V.diffV (tankPos t) v
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V.Vector bx by = (rotp tank) . (transp tank) $ bulletPos b
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V.Vector bx' by' = (rotp tank') . (transp tank') $ bulletPos b'
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minx = -(tankLength+bulletDiameter)/2
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maxx = (tankLength+bulletDiameter)/2
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miny = -(tankWidth+bulletDiameter)/2
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maxy = (tankWidth+bulletDiameter)/2
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collisionTankTank :: ((Tank, Tank), (Tank, Tank)) -> ((Tank, Tank), (Tank, Tank))
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collisionTankTank ((t1, t1'), (t2, t2')) = ((t1, t1'), (t2, t2'))
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-- where
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