Add menu option for auto camera rotation

src/Dodge/Base.hs

@@ -197,6 +197,7 @@ reflectCircCreatures rad p1 p2 cs
     $ IM.mapMaybe (reflectCircCreature rad p1 p2) cs
   where 
     f (a,_,_) = magV (a -.- p1)
+
 -- | collides a point with forcefields
 -- if found, returns point of collision, deflection if required, and the id
 collidePointFFs :: a
@@ -204,24 +205,10 @@ collidePointFFs = undefined
 collidePointFF  :: a
 collidePointFF  = undefined
 --
---collidePointFFs :: Point2 -> Point2 -> StdGen -> IM.IntMap ForceField 
---                    -> Maybe (Point2,(Maybe (Point2,StdGen),Int))
---collidePointFFs p1 p2 g fs = listToMaybe $ sortBy f $ IM.elems 
---                            $ IM.mapMaybe (collidePointFF p1 p2 g) fs
---    where f (a,_) (b,_) = compare (magV (p1 -.- a)) (magV (p1 -.- b))
---
---collidePointFF :: Point2 -> Point2 -> StdGen -> ForceField 
---                    -> Maybe (Point2,(Maybe (Point2,StdGen),Int))
---collidePointFF p1 p2 g ff = fmap f ip
---    where (p3:p4:_) = _ffLine ff
---          ip  = intersectSegSeg p1 p2 p3 p4
---          ref = (_ffDeflect ff) <*> Just g <*> Just (p2 -.- p1) <*> Just ff
---          f p = (p, (ref, _ffID ff))
-
--- | Looks for first collision of a circle with walls.
+-- | Looks for overlap of a circle with walls.
 -- If found, gives wall
-collideCircWallsReturnWall :: Point2 -> Float -> IM.IntMap Wall -> Maybe Wall
-collideCircWallsReturnWall p rad ws 
+overlapCircWallsReturnWall :: Point2 -> Float -> IM.IntMap Wall -> Maybe Wall
+overlapCircWallsReturnWall p rad ws 
     = L.fold (safeMinimumOnMaybeL (fmap (dist p) . f . _wlLine))
         ws
   where 

src/Dodge/Config/Data.hs

@@ -12,6 +12,7 @@ module Dodge.Config.Data (
     , resolution_factor
     , windowX
     , windowY
+    , rotate_to_wall
     ) where
 
 import Data.Aeson
@@ -27,6 +28,7 @@ data Configuration = Configuration
     , _resolution_factor    :: Int -- ^ Higher values divide screen size, i.e. make the resolution worse
     , _windowX              :: Float
     , _windowY              :: Float
+    , _rotate_to_wall       :: Bool
     }
   deriving (Generic, Show)
 makeLenses ''Configuration
@@ -46,4 +48,5 @@ defaultConfig = Configuration
     , _resolution_factor    = 1
     , _windowX              = 800
     , _windowY              = 600
+    , _rotate_to_wall       = True
     }

src/Dodge/Event/Menu.hs

@@ -1,6 +1,7 @@
 module Dodge.Event.Menu
     ( handlePressedKeyInMenu
-    ) where
+    ) 
+  where
 import Dodge.Data
 import Dodge.Debug.Terminal
 import Dodge.Menu

src/Dodge/Menu.hs

@@ -12,7 +12,6 @@ import Preload.Update
 import Dodge.Base.Window
 import Dodge.SoundLogic
 import Picture
---import Geometry
 
 import Control.Lens
 import Data.Maybe
@@ -25,8 +24,9 @@ optionMenu = OptionScreen
     }
 optionsOptions :: [MenuOption]
 optionsOptions =
-    [ Toggle ScancodeV (pushScreen soundMenu) (const "VOLUME")
+    [ Toggle ScancodeV (pushScreen soundMenu)    (const "VOLUME")
     , Toggle ScancodeG (pushScreen graphicsMenu) (const "GRAPHICS")
+    , Toggle ScancodeP (pushScreen gameplayOptionsMenu) (const "GAMEPLAY")
     ]
 levelMenuOptions :: [MenuOption]
 levelMenuOptions =
@@ -34,6 +34,21 @@ levelMenuOptions =
     ,  InvisibleToggle ScancodeO      (pushScreen optionMenu)
     ,  InvisibleToggle ScancodeC      (pushScreen displayControls)
     ]
+gameplayOptionsMenu :: ScreenLayer
+gameplayOptionsMenu  = OptionScreen
+    { _scTitle = const "OPTIONS:GAMEPLAY"
+    , _scOptions = gameplayMenuOptions
+    , _scDefaultEff = popScreen . writeConfig
+    , _scOptionFlag = NormalOptions
+    }
+gameplayMenuOptions :: [MenuOption]
+gameplayMenuOptions =
+    [ Toggle 
+        ScancodeR 
+        (Just . (config . rotate_to_wall %~ not))
+        (\w -> "ROTATE TO WALL:" ++ show (_rotate_to_wall $ _config w))
+    ]
+
 soundMenu :: ScreenLayer
 soundMenu = OptionScreen
     { _scTitle = const "OPTIONS:VOLUME"

src/Dodge/Update.hs

@@ -8,6 +8,7 @@ module Dodge.Update
 import Dodge.Data
 import Dodge.Menu
 import Dodge.Zone.Data
+import Dodge.Config.Data
 import Dodge.World.Trigger.Data
 --import Dodge.Config.Data
 import Dodge.Base
@@ -60,7 +61,7 @@ functionalUpdate w = case _menuLayers w of
         . ppEvents 
         . updateCamera
         . colCrsWalls
-        . rotateToOverlappingWall
+        . ifConfigWallRotate
         . simpleCrSprings 
         . zoneCreatures 
         . updateWalls
@@ -252,6 +253,11 @@ crCrSpring c1 c2 w
     overlap2 = ((comRad - diff) * _crMass c1 * 0.5 / massT) *.* errorNormalizeV 56 vec
     massT    = _crMass c1 + _crMass c2
 
+ifConfigWallRotate :: World -> World
+ifConfigWallRotate w
+    | _rotate_to_wall $ _config w = rotateToOverlappingWall w
+    | otherwise = w
+
 rotateToOverlappingWall :: World -> World
 rotateToOverlappingWall w = case theWall of
     Nothing -> w
@@ -267,7 +273,7 @@ rotateToOverlappingWall w = case theWall of
         b' = fromIntegral $ (round b :: Int)
     cr = you w
     p = _crPos cr
-    theWall = collideCircWallsReturnWall p (_crRad cr + 5) (wallsNearPoint p w)
+    theWall = overlapCircWallsReturnWall p (_crRad cr + 5) (wallsNearPoint p w)
 
 {-
 Finds the IDs of visible walls from a point to another point.  -}