38 lines
1015 B
Haskell
38 lines
1015 B
Haskell
module Dodge.SmoothScroll where
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import Control.Lens
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import Dodge.Data.Input
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-- this is fairly arbitrary, translated across from smooth scrolling on scopes
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calcSmoothScroll :: Int -> Int -> Int
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calcSmoothScroll y
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| y >= 3 = max 0 . (+ 100)
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| y >= 2 = max 0 . (+ 10)
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| y >= 1 = max 0 . (+ 1)
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| y >= 0 = id
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| y >= (-1) = min 0 . subtract 1
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| y >= (-2) = min 0 . subtract 10
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| otherwise = min 0 . subtract 100
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getSmoothScrollValue :: Input -> Int
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getSmoothScrollValue theinput = case theinput ^. smoothScrollAmount of
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x
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| x > 10 -> 3
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| x > 5 -> 2
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| x > 0 -> 1
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| x == 0 -> 0
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| x >= (-5) -> -1
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| x >= (-10) -> -2
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| otherwise -> -3
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-- this is fairly arbitrary, translated across from smooth scrolling on scopes
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advanceSmoothScroll :: (Ord a, Num a) => a -> a
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advanceSmoothScroll y
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| y >= 20 = y - 3
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| y >= 10 = y - 2
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| y > 0 = y - 1
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| y == 0 = 0
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| y > (-10) = y + 1
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| y > (-20) = y+2
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| otherwise = y+3
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