24 lines
691 B
Haskell
24 lines
691 B
Haskell
module Dodge.PosEvent (updatePosEvent) where
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import Control.Monad.State
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import Dodge.Data.World
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import Dodge.Spark
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import Geometry.Data
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import LensHelp
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import RandomHelp
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updatePosEvent :: World -> PosEvent -> (World, Maybe PosEvent)
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updatePosEvent w pv
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| _pvTimer pv < 1 = (w, Nothing)
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| otherwise = (posEventEffect pv w, Just $ pv & pvTimer -~ 1)
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posEventEffect :: PosEvent -> World -> World
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posEventEffect pv = case _pvType pv of
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SparkSpawner -> spawnElectricalSparks (_pvPos pv)
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spawnElectricalSparks :: Point2 -> World -> World
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spawnElectricalSparks = randSpark ElectricSpark rspeed rdir
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where
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rspeed = state (randomR (3, 6))
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rdir = state $ randomR (0, 2 * pi)
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