64 lines
2.3 KiB
Haskell
64 lines
2.3 KiB
Haskell
module Dodge.Base.Coordinate (
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cartePosToScreen,
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worldPosToScreen,
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screenToWorldPos,
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mouseWorldPos,
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) where
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import Control.Lens
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import Dodge.Data.Camera
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import Dodge.Data.HUD
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import Dodge.Data.Input
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import Geometry
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---- | Transform coordinates from world position to screen coordinates.
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--worldPosToScreenNorm :: Config -> World -> Point2 -> Point2
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--worldPosToScreenNorm cfig w = doWindowScale cfig . doRotate . doZoom . doTranslate
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-- where
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-- doTranslate p = p -.- (w ^. cWorld . lWorld . wCam . cwcCenter)
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-- doZoom p = (w ^. cWorld . lWorld . wCam . cwcZoom) *.* p
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-- doRotate p = rotateV (negate (w ^. cWorld . lWorld . wCam . cwcRot)) p
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{- | Transform world coordinates to scaled screen coordinates.
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- These have to be scaled according to the size of the window to get actual screen positions.
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- This allows for line thicknesses etc to correspond to pixel sizes.
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- I believe the resulting point is the number of pixels from the center of
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- the screen, I am not sure how rounding affects this though.
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-}
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worldPosToScreen :: Camera -> Point2 -> Point2
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worldPosToScreen cam =
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rotateV (negate $ cam ^. camRot)
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. ((cam ^. camZoom) *.*)
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. (-.- (cam ^. camCenter))
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{- | Transform coordinates from the map position to screen
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coordinates.
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-}
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cartePosToScreen :: HUD -> Point2 -> Point2
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cartePosToScreen thehud = doRotate . doZoom . doTranslate
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where
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doTranslate p = p - (thehud ^. carteCenter) -- _carteCenter (_hud (_cWorld w))
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doZoom p = (thehud ^. carteZoom) *.* p
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doRotate p = rotateV (negate $ thehud ^. carteRot) p
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--crToMousePosOffset :: Creature -> World -> (Point2, Float)
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--crToMousePosOffset cr w = (mouseWorldPos w -.- _crPos cr, 0)
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-- | The mouse position in world coordinates.
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mouseWorldPos :: Input -> Camera -> Point2
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mouseWorldPos inp cam = screenToWorldPos cam (inp ^. mousePos)
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screenToWorldPos :: Camera -> Point2 -> Point2
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screenToWorldPos cam p =
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(cam ^. camCenter)
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+ (1 / (cam ^. camZoom)) *.* rotateV (cam ^. camRot) p
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---- | The mouse position in map coordinates
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--mouseCartePos :: World -> Point2
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--mouseCartePos w = (thehud ^. carteCenter)
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-- +.+
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-- (1 / (thehud ^. carteZoom))
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-- *.* rotateV (thehud ^. carteRot) (_mousePos w)
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-- where
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-- thehud = w ^. cWorld . lWorld . hud
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