cga/Graphics/Diagram/Gif.hs

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{-# OPTIONS_HADDOCK ignore-exports #-}
module Graphics.Diagram.Gif where
import Algebra.Vector(PT)
import Algorithms.GrahamScan
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import Codec.Picture.Gif
import qualified Data.ByteString.Char8 as B
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import Data.Monoid
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import Diagrams.Backend.Cairo
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import Diagrams.Prelude hiding ((<>))
import Graphics.Diagram.AlgoDiags
import Graphics.Diagram.Core
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import Graphics.Diagram.Plotter
import Parser.Meshparser
-- |Return a list of tuples used by 'gifMain' to generate an animated gif.
gifDiag :: DiagProp -> [PT] -> [(Diagram Cairo R2, GifDelay)]
gifDiag p xs =
fmap ((\x -> (x, 50)) . (<> nonChDiag))
(upperHullList
<> fmap (<> last upperHullList) lowerHullList
<> [mkDiag (mconcat [convexHPText, convexHP, convexHLs])
p{ showCoordText = True } [xs]])
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where
upperHullList = mkGifDiag convexHStepsLs p purple grahamUHSteps xs
lowerHullList = mkGifDiag convexHStepsLs p orange grahamLHSteps xs
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-- add the x-axis and the other default stuff
nonChDiag =
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mconcat
. fmap (\x -> mkDiag x p [xs])
$ [coordPoints, plotterBG]
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-- |Same as gifDiag, except that it takes a string containing the
-- mesh file content instead of the the points.
gifDiagS :: DiagProp -> B.ByteString -> [(Diagram Cairo R2, GifDelay)]
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gifDiagS p = gifDiag p . filterValidPT p . meshVertices