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authorGriffin Smith <root@gws.fyi>2019-09-10T00·54-0400
committerGriffin Smith <root@gws.fyi>2019-09-10T00·54-0400
commit9ebdc6fbb446fea5e505172a6b3dd459beaf3552 (patch)
treea1403026afb597e12c25e84ef8991f062655e5b8 /src/Xanthous/Data
parente01cf9b0565eaa9c09e19f66331a2010aea908cb (diff)
Convert generated levels to walls
Add support for converting generated levels to walls, and merge one into
the entity map at the beginning of the game.

There's nothing here that guarantees the character ends up *inside* the
level though (they almost always don't) so that'll have to be slotted
into the level generation process.
Diffstat (limited to 'src/Xanthous/Data')
-rw-r--r--src/Xanthous/Data/EntityMap.hs13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/Xanthous/Data/EntityMap.hs b/src/Xanthous/Data/EntityMap.hs
index e3ceb6f65182..401e395547e1 100644
--- a/src/Xanthous/Data/EntityMap.hs
+++ b/src/Xanthous/Data/EntityMap.hs
@@ -15,6 +15,7 @@ module Xanthous.Data.EntityMap
   , lookup
   , lookupWithPosition
   -- , positionedEntities
+  , neighbors
   ) where
 
 import Data.Monoid (Endo(..))
@@ -22,7 +23,14 @@ import Test.QuickCheck (Arbitrary(..))
 import Test.QuickCheck.Checkers (EqProp)
 
 import Xanthous.Prelude hiding (lookup)
-import Xanthous.Data (Position, Positioned(..), positioned, position)
+import Xanthous.Data
+  ( Position
+  , Positioned(..)
+  , positioned
+  , position
+  , Neighbors(..)
+  , neighborPositions
+  )
 import Xanthous.Orphans ()
 import Xanthous.Util (EqEqProp(..))
 
@@ -139,3 +147,6 @@ lookup eid = fmap (view positioned) . lookupWithPosition eid
 -- unlawful :(
 -- positionedEntities :: IndexedTraversal EntityID (EntityMap a) (EntityMap b) (Positioned a) (Positioned b)
 -- positionedEntities = byID . itraversed
+
+neighbors :: Position -> EntityMap a -> Neighbors (Vector a)
+neighbors pos em = (\p -> view (atPosition p) em) <$> neighborPositions pos