ad-hoc braille dot rendering, Haskell

ad-hoc braille dot rendering

import Data.Bits (bit)
main = putStr (render logo (55, 31))

logo  xy     = disc xy && not (cross xy)
disc  (x, y) = x*x + y*y < 1
cross (x, y) = within 0.25 x (-0.4) || within 0.1 y (-0.3)
within e a b = abs (a - b) < e

render f (w, h) = unlines (map row [0..h-1]) where
  row  y   = map (dots y) [0..w-1]
  pos  y x = f (x*2/w-1, -y*2/h+1)
  dots y x = blanks . toEnum . (+0x2800) . sum . map dot $ braille 
    where dot (b, dx, dy) = if pos (y+dy) (x+dx) then b else 0
  blanks c = case c of '\x2800' -> '\x2820'; c -> c
  braille  = zipWith (\i (x,y) -> (bit i, x/3, y/5)) [0..]
      [(0,0),(0,1),(0,2),(1,0),(1,1),(1,2),(0,3),(1,3)]

{-
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣶⣶⣶⣶⣶⣶⣶⣶⣤⣤⣀⡀⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣦⣀⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣄⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⣠⣾⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⣾⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⣠⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡀⠠⠠⠠⠠
⠠⠠⠠⠠⣰⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠠⠠⠠
⠠⠠⠠⣰⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠠⠠
⠠⠠⢠⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠
⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠠
⠠⣼⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄
⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷
⢰⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿
⠠⠿⠿⠿⠿⠿⠿⠿⠿⠿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⢿⣿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠠⠠
⠠⠠⠠⠠⢿⣿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠠⠠⠠
⠠⠠⠠⠠⠠⢿⣿⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠙⣿⣿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠈⢿⣿⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠈⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠛⠁⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠟⠋⠁⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠⠠
-}


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