start filling the state

src/Main.hs

@@ -9,6 +9,8 @@ import Control.Monad.Loops
 import Control.Monad.IO.Class
 import Control.Monad.Trans.Resource
 import Data.Bits
+import qualified Data.Map.Strict as M
+import qualified Data.Vector as V
 import Data.Word
 import qualified SDL hiding (V2)
 import qualified Vulkan as Vk
@@ -22,8 +24,15 @@ import Types
 
 main :: IO ()
 main = do
-  container <- STM.newEmptyTMVarIO
-  runRender (ReadState container) $ do
+  renderablesContainer <- STM.newTMVarIO (V.empty)
+  meshMap <- STM.newTMVarIO (M.empty)
+  materialMap <- STM.newTMVarIO (M.empty)
+  let initState = ReadState
+        { renderables = renderablesContainer
+        , meshLibrary = meshMap
+        , materialLibrary = materialMap
+        }
+  runRender initState $ do
     engineData <- initEngine
 
     SDL.showWindow $ engineWindow engineData

src/Mesh.hs

@@ -5,9 +5,13 @@ module Mesh where
 
 import Codec.Wavefront
 
+import qualified Control.Concurrent.STM as STM
+import qualified Control.Monad as CM (void)
 import Control.Monad.IO.Class
+import Control.Monad.Reader (asks)
 import Control.Monad.Trans.Resource
 
+import qualified Data.Map.Strict as M
 import qualified Data.Vector as V
 
 import Foreign
@@ -23,14 +27,27 @@ import qualified Vulkan.Zero as Vk
 import Types
 
 loadMeshes
-  :: V.Vector Vertex
-loadMeshes =
-  V.fromList
+  :: VMA.Allocator
+  -> Render ()
+loadMeshes allocator = do
+  let triangle = V.fromList
         [ Vertex (V3 0.5 0.5 0)    (V3 0 0 0) (V4 0 1 0 1)
         , Vertex (V3 (-0.5) 0.5 0) (V3 0 0 0) (V4 0 1 0 1)
         , Vertex (V3 0 (-0.5) 0)   (V3 0 0 0) (V4 0 1 0 1)
         ]
 
+  triMesh <- uploadMesh triangle allocator
+  maskMesh <- loadFromObj "./assets/cat_mask_cyberpunk.obj" allocator
+
+  meshLib <- asks meshLibrary
+
+  liftIO $ STM.atomically $ do
+    meshMap <- STM.readTMVar meshLib
+    let newMap =
+          M.insert "triangle" triMesh $
+          M.insert "mask" maskMesh meshMap
+    CM.void $ STM.swapTMVar meshLib newMap
+
 uploadMesh
   :: (MonadResource m, MonadFail m)
   => V.Vector Vertex

src/Types.hs

@@ -7,6 +7,7 @@ import Control.Concurrent.STM.TMVar as STM
 import Control.Monad.IO.Class
 import Control.Monad.Reader
 import Control.Monad.Trans.Resource
+import qualified Data.Map.Strict as M
 import qualified Data.Vector as V
 import Foreign
 import Foreign.C.Types (CInt)
@@ -159,14 +160,16 @@ data Material = Material
   deriving (Show)
 
 data RenderObject = RenderObject
-  { objectMesh     :: Mesh
-  , objectMaterial :: Material
+  { objectMesh     :: String
+  , objectMaterial :: String
   , objectMatrix   :: M44 Float
   }
   deriving (Show)
 
-newtype ReadState = ReadState
+data ReadState = ReadState
   { renderables     :: STM.TMVar (V.Vector RenderObject)
+  , meshLibrary     :: STM.TMVar (M.Map String Mesh)
+  , materialLibrary :: STM.TMVar (M.Map String Material)
   }
 
 newtype RenderReader rd m a = RenderReader

vulkan-tutorial.cabal

@@ -53,6 +53,7 @@ executable vulkan-tutorial
                     , vector
                     , resourcet
                     , mtl
+                    , containers
     hs-source-dirs:   src
     default-language: Haskell2010
     ghc-options:      -Wall