cga/Parser/Meshparser.hs
2014-10-10 17:48:22 +02:00

29 lines
781 B
Haskell

{-# OPTIONS_HADDOCK ignore-exports #-}
module Parser.Meshparser (meshToArr) where
import Algebra.VectorTypes
import Control.Applicative
import Diagrams.TwoD.Types
import Parser.Core
-- | Convert a text String with multiple vertices into
-- an array of float tuples.
meshToArr :: String -- ^ the string to convert
-> [PT] -- ^ the resulting vertice table
meshToArr =
fmap p2 .
fmap (\(Just (x, _)) -> x) .
filter (/= Nothing) .
fmap (runParser parseVertice) .
lines
-- | Creates a Parser that accepts a single vertice, such as 'v 1.0 2.0'.
parseVertice :: Parser (Double, Double)
parseVertice =
(,) <$>
(char 'v' *> spaces *> posDouble) <*>
(spaces *> posDouble)