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Make argument of scale Double

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This commit is contained in:
Simon Bruder 2022-12-27 20:02:13 +01:00
parent b9c0851beb
commit 872954f492
Signed by: simon
GPG key ID: 8D3C82F9F309F8EC
1 changed files with 5 additions and 5 deletions
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10
genstar/Main.hs
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@ -21,8 +21,8 @@ instance Arbitrary Vertex where
fromAngle angle = Point (sin angle, cos angle)
-- | 'scale' @s@ @p@ scales the vector to @p@ by the factor @s@.
scale :: Integer -> Vertex -> Vertex
scale s (Point (x, y)) = Point (fromInteger s * x, fromInteger s * y)
scale :: Double -> Vertex -> Vertex
scale s (Point (x, y)) = Point (s * x, s * y)
-- | 'move' @p1@ @p2@ adds the coordinates of @p1@ and @p2@,
-- effectively moving @p1@ by @p2@ (or vice-versa).
@ -43,14 +43,14 @@ instance Show PolygonPath where
-- with the center at @pos@
-- that is modified in the sense that it takes @rf@,
-- which is used to set the radius for each individual point.
regularPolygonMod :: Integer -> (Integer -> Integer) -> Vertex -> PolygonPath
regularPolygonMod :: Integer -> (Integer -> Double) -> Vertex -> PolygonPath
regularPolygonMod n rf pos = PolygonPath (map (\step -> move pos $ scale (rf step) $ fromAngle (fromInteger step * 2 * pi / fromInteger n)) [0 .. (n - 1)])
-- | 'regularPolygon' @n@ @r@ @pos@
-- creates a regular polygon
-- with the radius @r@
-- and the center at @pos@.
regularPolygon :: Integer -> Integer -> Vertex -> PolygonPath
regularPolygon :: Integer -> Double -> Vertex -> PolygonPath
regularPolygon n r = regularPolygonMod n (const r)
-- | 'star' @n@ @r1@ @r2@ @pos@
@ -59,7 +59,7 @@ regularPolygon n r = regularPolygonMod n (const r)
-- the inner radius @r1@,
-- the outer radius @r2@
-- and the center @pos@.
star :: Integer -> Integer -> Integer -> Vertex -> PolygonPath
star :: Integer -> Double -> Double -> Vertex -> PolygonPath
star n r1 r2 = regularPolygonMod (n * 2) ((take (fromInteger n * 2) (cycle [r1, r2]) !!) . fromInteger)
main :: IO ()