Camera position refactor

src/Dodge/Data/CamPos.hs

@@ -0,0 +1,28 @@
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TemplateHaskell #-}
+module Dodge.Data.CamPos where
+
+import Control.Lens
+import Data.Aeson
+import Data.Aeson.TH
+import Geometry.Data
+
+data CamPos = CamPos
+    { _camCenter :: Point2
+    , _camRot :: Float
+    , _camZoom :: Float -- smaller values zoom out
+    , _camItemZoom :: Float
+    , _camDefaultZoom :: Float
+    , _camViewFrom :: Point2
+    , _camViewDistance :: Float
+    , _camBoundBox :: [Point2]
+    , _camBoundDist :: (Float, Float, Float, Float) -- NSEW, S and W negative
+    }
+
+makeLenses ''CamPos
+concat
+    <$> mapM
+        (deriveJSON defaultOptions)
+        [ ''CamPos ]