92 lines
No EOL
2.6 KiB
Haskell
92 lines
No EOL
2.6 KiB
Haskell
module Render ( setup
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, resize
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, render
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) where
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import Game
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import Level
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import Tank
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import Texture
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import Control.Monad.State
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import Data.Fixed
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import Data.Maybe
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import Data.Ratio
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import qualified Data.Map as M
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import Bindings.GLPng
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import Graphics.Rendering.OpenGL.GL (($=), GLfloat, GLdouble)
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import Graphics.Rendering.OpenGL.GL.BeginEnd (renderPrimitive, PrimitiveMode(..))
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import Graphics.Rendering.OpenGL.GL.CoordTrans (matrixMode, MatrixMode(..), viewport, Position(..), Size(..), loadIdentity, ortho)
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import Graphics.Rendering.OpenGL.GL.Framebuffer (clear, ClearBuffer(..))
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import Graphics.Rendering.OpenGL.GL.Texturing.Objects (TextureObject(..))
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import Graphics.Rendering.OpenGL.GL.Texturing.Parameters (Repetition(..), Clamping(..), TextureFilter(..), MinificationFilter, MagnificationFilter)
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import Graphics.Rendering.OpenGL.GL.VertexSpec
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texturePath :: Texture -> String
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texturePath t
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| t == TextureWood = "tex/Wood.png"
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getTexture :: Texture -> Game TextureObject
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getTexture t = do
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ts <- gets textures
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let tobj = M.lookup t ts
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if (isJust tobj)
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then
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return $ fromJust tobj
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else do
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tex <- liftIO $ pngBind (texturePath t) NoMipmap Solid (Repeated, Repeat) (Linear', Nothing) Linear' >>= return . TextureObject . fromIntegral . fst
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modify $ \state -> state {textures = M.insert t tex ts}
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return tex
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setup :: Int -> Int -> Game ()
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setup w h = do
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resize w h
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-- cache textures
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getTexture TextureWood
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return ()
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resize :: Int -> Int -> Game ()
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resize w h = do
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let wn = fromIntegral w
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hn = fromIntegral h
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aspect = fromReal (wn/hn)
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lvl <- gets level
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let s = max (0.5*(fromIntegral $ levelWidth lvl)/aspect) (0.5*(fromIntegral $ levelHeight lvl)) :: GLdouble
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liftIO $ do
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matrixMode $= Projection
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loadIdentity
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ortho (-s*aspect) (s*aspect) (-s) s (-1) 1
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matrixMode $= Modelview 0
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viewport $= ((Position 0 0), (Size (fromIntegral w) (fromIntegral h)))
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render :: Game ()
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render = do
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tank <- liftM head $ gets tanks
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let x = fromReal . posx $ tank
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y = fromReal . posy $ tank
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liftIO $ do
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clear [ColorBuffer]
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renderPrimitive Quads $ do
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vertex $ Vertex2 (x-0.5 :: GLfloat) (y-0.5 :: GLfloat)
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vertex $ Vertex2 (x-0.5 :: GLfloat) (y+0.5 :: GLfloat)
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vertex $ Vertex2 (x+0.5 :: GLfloat) (y+0.5 :: GLfloat)
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vertex $ Vertex2 (x+0.5 :: GLfloat) (y-0.5 :: GLfloat)
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fromReal :: (Real a, Fractional b) => a -> b
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fromReal = fromRational . toRational |