Haskell - mã chất lượng thấp
Tôi đã vô cùng mệt mỏi khi tôi viết điều này.
Tôi có thể đã đi quá xa với ý tưởng dự đoán, dù sao, đây là dự đoán mà chương trình sử dụng. Về cơ bản giống như chiếu trái đất lên một khối lập phương và sau đó mở ra nó. Bên cạnh đó, trong phép chiếu này, bóng được tạo thành từ các đường thẳng.
Chương trình sử dụng ngày / giờ hiện tại và xuất ra tệp PPM trên thiết bị xuất chuẩn.
import Data.Time.Clock
import Data.Time.Calendar
import Control.Applicative
import Data.Fixed
import Data.Maybe
earth :: [[Int]]
earth = [[256],[256],[256],[256],[64,1,1,2,1,5,14,16,152],[56,19,3,27,1,6,50,1,2,1,90],[53,6,1,11,2,36,26,1,2,1,16,2,1,1,2,1,24,4,66],[47,2,5,14,4,35,22,7,54,2,1,3,60],[38,1,2,2,3,1,6,1,2,1,2,7,6,1,1,33,24,3,3,1,56,2,60],[34,2,1,4,2,1,3,1,1,3,3,2,15,3,3,29,57,5,19,1,2,11,17,1,1,1,34],[40,3,10,2,1,8,16,27,54,3,18,19,18,1,36],[33,6,5,3,2,3,1,3,2,2,1,5,16,21,1,2,53,2,10,1,6,19,1,7,4,3,9,2,33],[32,4,1,7,1,2,3,2,1,1,3,11,14,23,53,2,10,3,1,4,2,33,7,7,29],[8,5,25,10,5,3,2,14,10,2,1,18,1,2,31,6,18,1,7,4,1,60,22],[5,18,2,12,3,5,1,3,2,2,1,3,4,2,3,8,11,18,30,13,9,2,7,3,2,72,1,6,8],[4,36,2,1,1,4,3,7,1,4,3,9,8,15,34,18,2,2,2,17,1,78,4],[4,1,1,27,3,1,1,24,6,3,1,1,1,3,6,13,13,1,20,15,1,4,1,104,1],[3,31,1,24,1,2,4,8,10,9,12,6,18,7,3,7,1,1,2,99,3,2,2],[7,50,2,2,2,1,2,1,3,2,1,2,10,7,15,1,20,7,2,111,7,1],[4,35,1,15,9,1,1,3,4,1,12,5,34,8,3,110,10],[4,9,1,2,1,37,12,6,16,3,34,8,3,96,5,6,13],[6,6,1,1,8,32,12,6,3,1,49,9,4,2,1,86,1,3,4,2,19],[9,2,1,1,11,31,11,11,40,1,8,1,2,4,5,83,12,3,20],[8,1,16,33,9,11,39,2,8,1,2,3,3,83,13,5,19],[28,33,5,12,40,2,7,3,6,62,1,19,13,5,20],[27,36,2,15,34,3,2,2,6,71,1,22,11,2,22],[30,21,1,11,2,16,33,3,1,4,2,72,1,24,1,1,9,1,23],[31,21,1,26,39,4,1,98,1,1,33],[31,42,7,1,40,100,1,1,33],[33,25,2,15,4,4,35,102,36],[33,23,2,1,2,14,8,1,36,27,1,9,1,61,3,1,33],[33,26,5,14,42,10,1,11,2,2,2,7,3,5,1,9,1,44,38],[33,26,1,2,1,9,2,1,45,7,1,2,2,9,8,6,2,6,1,53,4,2,33],[33,26,1,4,1,6,44,8,6,2,3,7,9,5,3,56,1,1,4,3,33],[33,37,45,8,7,2,3,6,2,4,3,6,4,53,43],[33,36,46,6,6,1,4,1,2,2,3,16,3,47,1,5,8,2,34],[34,34,46,7,11,1,3,2,2,16,3,45,6,2,8,1,35],[34,33,48,5,11,1,4,1,4,16,2,49,3,2,6,2,35],[35,32,54,8,17,60,5,2,4,4,35],[36,30,50,12,18,60,8,2,1,1,38],[38,27,50,15,16,61,6,2,41],[38,25,51,18,3,4,6,62,6,1,42],[39,1,1,17,2,3,51,93,49],[40,1,1,11,9,2,49,31,1,10,2,50,49],[40,1,2,9,10,2,48,33,1,10,2,49,49],[41,1,2,8,11,1,47,34,2,10,5,44,50],[42,1,2,7,58,36,1,11,2,1,8,36,51],[46,6,58,36,2,15,7,34,2,1,49],[46,6,12,2,43,38,2,14,7,2,1,12,1,15,55],[46,6,5,2,7,2,41,38,2,14,10,10,4,10,59],[47,6,3,3,10,3,38,37,3,12,11,8,6,9,2,1,57],[49,10,51,38,3,9,13,7,8,9,9,2,48],[51,7,51,40,2,7,15,6,9,1,1,8,8,2,48],[55,7,47,41,1,6,17,4,12,8,8,1,49],[57,5,47,42,1,2,20,4,13,8,9,1,47],[59,3,8,1,38,43,22,4,13,1,2,4,10,2,46],[60,2,6,5,38,41,1,4,18,3,17,3,10,2,46],[61,2,1,1,2,3,1,7,34,45,18,2,18,1,60],[63,1,2,13,33,44,22,1,12,1,16,3,45],[66,14,33,43,22,1,13,1,14,1,1,1,46],[66,18,30,4,1,1,5,30,34,1,2,2,9,3,50],[66,19,43,27,34,2,2,1,7,3,52],[65,20,43,26,36,2,1,2,5,5,51],[65,21,42,24,39,3,4,7,2,1,1,1,1,1,44],[56,1,7,23,41,16,1,6,41,2,4,6,7,1,44],[64,25,39,16,1,5,42,3,4,5,2,1,8,1,2,1,37],[64,29,35,22,43,3,1,1,2,3,2,1,1,1,2,1,1,2,1,7,6,1,27],[63,31,35,20,45,2,11,1,9,7,4,2,26],[64,32,34,19,67,1,2,6,1,2,28],[65,31,34,12,1,6,48,4,18,6,31],[65,31,34,19,54,2,1,2,2,1,10,2,2,1,30],[66,29,36,14,1,3,57,1,19,2,28],[66,29,36,14,1,4,63,1,42],[67,27,36,15,1,4,63,5,3,2,33],[67,26,37,20,5,2,53,2,1,4,4,2,33],[68,25,37,20,4,3,52,9,3,3,32],[70,23,36,20,3,4,53,11,1,4,31],[71,22,37,17,5,4,51,18,31],[71,22,37,16,7,3,50,20,30],[71,21,39,15,6,3,5,1,42,24,29],[71,20,40,15,6,3,47,26,28],[71,17,43,15,6,3,46,28,27],[71,16,45,13,8,1,48,27,27],[71,16,45,12,58,28,26],[71,16,45,12,58,28,26],[70,16,47,10,59,28,26],[70,15,49,9,60,27,26],[70,14,50,7,62,7,6,13,27],[70,13,51,6,63,6,8,1,1,9,28],[70,10,138,10,28],[69,12,139,7,29],[69,11,141,5,19,3,8],[69,8,167,3,9],[69,8,166,1,1,1,10],[70,5,149,2,16,2,12],[69,6,166,3,12],[68,6,166,2,14],[68,5,166,3,14],[68,6,182],[67,6,183],[68,4,184],[68,4,6,2,176],[69,4,183],[70,5,20,1,160],[256],[256],[256],[256],[256],[256],[78,1,1,1,109,1,65],[75,2,115,1,23,1,39],[72,3,80,1,1,5,20,42,32],[74,1,70,1,4,21,5,52,2,1,25],[67,1,2,2,1,4,64,28,4,62,21],[69,9,34,1,1,1,1,1,1,1,2,48,3,69,15],[50,1,5,1,16,5,34,130,14],[32,1,1,2,4,1,3,1,4,29,32,128,18],[20,1,1,54,32,128,20],[17,49,34,137,19],[9,1,2,54,20,4,6,143,17],[16,51,18,5,10,135,21],[11,1,4,54,25,140,21],[12,66,4,155,19],[12,231,13],[0,6,9,5,2,234],[0,256],[0,256]]
main = do
header
mapM_ line [0..299]
where
header = do
putStrLn "P3"
putStrLn "# Some PPM readers expect a comment here"
putStrLn "400 300"
putStrLn "2"
line y = mapM_ (\x -> pixel x y >>= draw) [0..399]
where
draw (r, g, b) = putStrLn $ (show r) ++ " " ++ (show g) ++ " " ++ (show b)
pixel x y = fromMaybe (return (1, 1, 1)) $
mapRegion (\x y -> (50, -x, y)) (x - 50) (y - 50)
<|> mapRegion (\x y -> (-x, -50, y)) (x - 150) (y - 50)
<|> mapRegion (\x y -> (-x, y, 50)) (x - 150) (y - 150)
<|> mapRegion (\x y -> (-50, y, -x)) (x - 250) (y - 150)
<|> mapRegion (\x y -> (y, 50, -x)) (x - 250) (y - 250)
<|> mapRegion (\x y -> (y, -x, -50)) (x - 350) (y - 250)
where
mapRegion f x y = if x >= -50 && y >= -50 && x < 50 && y < 50 then
Just $ fmap (worldMap . shade) getCurrentTime
else Nothing
where
t (x, y, z) = (atan2 y z) / pi
p (x, y, z) = asin (x / (sqrt $ x*x+y*y+z*z)) / pi * 2
rotate o (x, y, z) = (x, y * cos o + z * sin o, z * cos o - y * sin o)
tilt o (x, y, z) = (x * cos o - y * sin o, x * sin o + y * cos o, z)
shade c = ((t $ rotate yearAngle $ tilt 0.366 $ rotate (dayAngle - yearAngle) $ f x y)) `mod'` 2 > 1
where
dayAngle = fromIntegral (fromEnum $ utctDayTime c) / 43200000000000000 * pi + pi / 2
yearAngle = (fromIntegral $ toModifiedJulianDay $ utctDay c) / 182.624 * pi + 2.5311
worldMap c = case (c, index (t $ f x y) (p $ f x y)) of
(False, False) -> (0, 0, 0)
(False, True) -> (0, 0, 1)
(True, False) -> (2, 1, 0)
(True, True) -> (0, 1, 2)
where
index x y = index' (earth !! (floor $ (y + 1) * 63)) (floor $ (x + 1) * 127) True
where
index' [] _ p = False
index' (x:d) n p
| n < x = p
| otherwise = index' d (n - x) (not p)
Điều đó đúng - where
mã hình tam giác , case
s lồng nhau , sử dụng IO không hợp lệ.