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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 = 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)
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