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.

1 files changed, 23 insertions, 6 deletions

diff --git a/src/Xanthous/App.hs b/src/Xanthous/App.hs
index 6cf22135a7a4..af6b5caf6178 100644
--- a/src/Xanthous/App.hs
+++ b/src/Xanthous/App.hs
@@ -1,25 +1,30 @@
 module Xanthous.App (makeApp) where
-
+--------------------------------------------------------------------------------
 import           Xanthous.Prelude
 import           Brick hiding (App, halt, continue, raw)
 import qualified Brick
 import           Graphics.Vty.Attributes (defAttr)
 import           Graphics.Vty.Input.Events (Event(EvKey))
 import           Control.Monad.State (get)
-
+import           Control.Monad.Random (getRandom)
+--------------------------------------------------------------------------------
 import           Xanthous.Command
-import           Xanthous.Data (move, Position(..))
+import           Xanthous.Data (move, Position(..), Dimensions'(Dimensions), Dimensions)
 import qualified Xanthous.Data.EntityMap as EntityMap
+import           Xanthous.Data.EntityMap (EntityMap)
 import           Xanthous.Game
 import           Xanthous.Game.Draw (drawGame)
 import           Xanthous.Monad
 import           Xanthous.Resource (Name)
-
+--------------------------------------------------------------------------------
 import           Xanthous.Entities.Creature (Creature)
 import qualified Xanthous.Entities.Creature as Creature
 import           Xanthous.Entities.RawTypes (EntityRaw(..))
 import           Xanthous.Entities.Raws (raw)
-import           Xanthous.Entities.SomeEntity
+import           Xanthous.Entities
+import           Xanthous.Generators
+import qualified Xanthous.Generators.CaveAutomata as CaveAutomata
+--------------------------------------------------------------------------------
 
 type App = Brick.App GameState () Name
 type AppM a = AppT (EventM Name) a
@@ -43,7 +48,10 @@ testGormlak =
 
 startEvent :: AppM ()
 startEvent = do
-  () <- say ["welcome"]
+  say_ ["welcome"]
+  level <- generateLevel SCaveAutomata CaveAutomata.defaultParams
+          $ Dimensions 120 80
+  entities <>= level
   entities %= EntityMap.insertAt (Position 10 10) (SomeEntity testGormlak)
 
 handleEvent :: BrickEvent Name () -> AppM (Next GameState)
@@ -62,3 +70,12 @@ handleCommand (Move dir) = do
 handleCommand PreviousMessage = do
   messageHistory %= popMessage
   continue
+
+--------------------------------------------------------------------------------
+
+generateLevel :: SGenerator gen -> Params gen -> Dimensions -> AppM (EntityMap SomeEntity)
+generateLevel g ps dims = do
+  gen <- use randomGen
+  let cells = generate g ps dims gen
+  _ <- getRandom @_ @Int -- perturb the generator, so we don't get the same level twice
+  pure $ SomeEntity <$> cellsToWalls cells