From 1a0f618a829ec356e29176c77ea90a8a5a0157b4 Mon Sep 17 00:00:00 2001
From: Griffin Smith <root@gws.fyi>
Date: Sat, 28 Sep 2019 13:20:57 -0400
Subject: Implement the start of creature AI

Add a Brain class, which determines for an entity the set of moves it
makes every step of the game, and begin to implement that for gormlaks.
The idea here is that every step of the game, a gormlak will move
towards the furthest-away wall it can see.
---
 src/Xanthous/Entities/Item.hs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'src/Xanthous/Entities/Item.hs')

diff --git a/src/Xanthous/Entities/Item.hs b/src/Xanthous/Entities/Item.hs
index 6b50f50ad83c..832f0d4d62b3 100644
--- a/src/Xanthous/Entities/Item.hs
+++ b/src/Xanthous/Entities/Item.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE StandaloneDeriving #-}
 --------------------------------------------------------------------------------
 module Xanthous.Entities.Item
   ( Item(..)
@@ -13,7 +14,14 @@ import           Data.Aeson.Generic.DerivingVia
 --------------------------------------------------------------------------------
 import           Xanthous.Entities.RawTypes hiding (Item, description)
 import qualified Xanthous.Entities.RawTypes as Raw
-import           Xanthous.Entities (Draw(..), Entity(..), DrawRawChar(..))
+import           Xanthous.Entities
+                 ( Draw(..)
+                 , Entity(..)
+                 , DrawRawChar(..)
+                 , Brain(..)
+                 , Brainless(..)
+                 , brainVia
+                 )
 --------------------------------------------------------------------------------
 
 data Item = Item
@@ -27,6 +35,9 @@ data Item = Item
                        Item
 makeLenses ''Item
 
+-- deriving via (Brainless Item) instance Brain Item
+instance Brain Item where step = brainVia Brainless
+
 instance Arbitrary Item where
   arbitrary = Item <$> arbitrary
 
-- 
cgit 1.4.1