Update viewport on resize

1 files changed, 34 insertions, 4 deletions

diff --git a/Render.hs b/Render.hs
index d871678..86a7ccf 100644
--- a/Render.hs
+++ b/Render.hs
@@ -1,14 +1,44 @@
-module Render ( render
+module Render ( setup
+              , resize
+              , render
               ) where
 
 
 import Game
 
 import Control.Monad.State
+
+import Graphics.Rendering.OpenGL.GL (($=), GLfloat)
+import Graphics.Rendering.OpenGL.GL.BeginEnd (renderPrimitive, PrimitiveMode(..))
+import Graphics.Rendering.OpenGL.GL.CoordTrans (matrixMode, MatrixMode(..), viewport, Position(..), Size(..), loadIdentity, ortho)
 import Graphics.Rendering.OpenGL.GL.Framebuffer (clear, ClearBuffer(..))
+import Graphics.Rendering.OpenGL.GL.VertexSpec
+
+
+setup :: Int -> Int -> IO ()
+setup = resize
+  
+resize :: Int -> Int -> IO ()
+resize w h = do
+  let wn = fromIntegral w
+      hn = fromIntegral h
+      aspect = wn/hn
+  
+  matrixMode $= Projection
+  loadIdentity
+  ortho (-aspect) (aspect) (-1) 1 (-1) 1
+  
+  matrixMode $= Modelview 0
+  
+  viewport $= ((Position 0 0), (Size (fromIntegral w) (fromIntegral h)))
 
 
 render :: Game ()
-render = do
-  liftIO $ clear [ColorBuffer]
-  
\ No newline at end of file
+render = liftIO $ do
+           clear [ColorBuffer]
+           
+           renderPrimitive Triangles $ do
+                    vertex $ Vertex2 (-0.5 :: GLfloat) (0.5 :: GLfloat)
+                    vertex $ Vertex2 (0.5 :: GLfloat) (0.5 :: GLfloat)
+                    vertex $ Vertex2 (0.5 :: GLfloat) (-0.5 :: GLfloat)
+                    
\ No newline at end of file