Commit before attempting to change cloud shading

2023-03-20 15:09:13 +00:00
parent f4038fde46
commit 7ba374c1fd
8 changed files with 103 additions and 24 deletions
@@ -0,0 +1,33 @@
+module Shader.Poke.Cloud (
+    pokeCloud,
+) where
+
+import qualified Data.Vector.Unboxed as UV
+import Dodge.Data.Cloud
+import Foreign
+import Geometry
+import Graphics.GL.Core45
+
+pokeCloud :: Ptr Float -> Ptr GLushort -> (Int, Int) -> Cloud -> IO (Int, Int)
+pokeCloud vptr iptr (nv,ni) cl = do
+    UV.imapM_ (pokeCloudVerx vptr cl nv) $ UV.fromList [(1, 1), (1, -1), (-1, -1), (-1, 1)]
+    UV.imapM_ (pokeCloudIndex iptr nv ni) $ UV.fromList [0, 1, 2, 2, 1, 3]
+    return (nv + 4, ni + 6)
+
+pokeCloudVerx :: Ptr Float -> Cloud -> Int -> Int -> (Float, Float) -> IO ()
+pokeCloudVerx ptr cl nv i (dx, dy) =
+    UV.imapM_ (pokeCloudFloat ptr (nv + i)) $ UV.fromList 
+        [x, y, cz, 1, r, g, b, a, cx, cy, cz, rad, dx, dy, 0, 0]
+  where
+    V3 cx cy cz = _clPos cl
+    V2 x y = V2 cx cy - rad *.* V2 dx dy
+    rad = _clRad cl
+    V4 r g b a = case _clPict cl of
+        CloudColor _ _ col -> col
+        DrawGasCloud col -> col
+
+pokeCloudFloat :: Ptr Float -> Int -> Int -> Float -> IO ()
+pokeCloudFloat ptr nv i = pokeElemOff ptr (nv * 16 + i)
+
+pokeCloudIndex :: Ptr GLushort -> Int -> Int -> Int -> Int -> IO ()
+pokeCloudIndex ptr nv ni ioff voff = pokeElemOff ptr (ni + ioff) (fromIntegral $ nv + voff)