137 lines
No EOL
6.2 KiB
Haskell
137 lines
No EOL
6.2 KiB
Haskell
module Render ( setup
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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, Capability(..), Vector3(..))
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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, preservingMatrix, ortho, translate, rotate)
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import Graphics.Rendering.OpenGL.GL.Framebuffer (clear, ClearBuffer(..))
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import Graphics.Rendering.OpenGL.GL.PerFragment (blend, blendFunc, BlendingFactor(..))
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import Graphics.Rendering.OpenGL.GL.Texturing.Application (texture)
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import Graphics.Rendering.OpenGL.GL.Texturing.Objects (textureBinding, 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.Texturing.Specification (TextureTarget(..))
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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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| t == TextureTank = "tex/Tank.png"
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| t == TextureCannon = "tex/Cannon.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) BuildMipmap Alpha (Repeated, Repeat) (Linear', Just Linear') 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 :: Game ()
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setup = do
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liftIO $ do
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blend $= Enabled
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blendFunc $= (SrcAlpha, OneMinusSrcAlpha)
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-- cache textures
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getTexture TextureWood
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getTexture TextureTank
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getTexture TextureCannon
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return ()
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render :: Game ()
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render = do
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tanklist <- gets tanks
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textureWood <- getTexture TextureWood
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textureTank <- getTexture TextureTank
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textureCannon <- getTexture TextureCannon
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(lw, lh) <- gets level >>= \l -> return (fromIntegral . levelWidth $ l :: GLfloat, fromIntegral . levelHeight $ l :: GLfloat)
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liftIO $ do
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clear [ColorBuffer]
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texture Texture2D $= Enabled
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textureBinding Texture2D $= Just textureWood
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renderPrimitive Quads $ do
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texCoord $ TexCoord2 (0 :: GLfloat) (0 :: GLfloat)
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vertex $ Vertex2 0 lh
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texCoord $ TexCoord2 lw 0
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vertex $ Vertex2 lw lh
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texCoord $ TexCoord2 lw lh
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vertex $ Vertex2 lw 0
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texCoord $ TexCoord2 0 lh
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vertex $ Vertex2 (0 :: GLfloat) (0 :: GLfloat)
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forM_ tanklist $ \tank -> preservingMatrix $ do
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let x = fromReal . posx $ tank
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y = fromReal . posy $ tank
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rotDir = 90 + (fromReal . dir $ tank)
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rotAim = 90 + (fromReal . aim $ tank)
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translate $ Vector3 x y (0 :: GLfloat)
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rotate rotDir $ Vector3 0 0 (1 :: GLfloat)
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textureBinding Texture2D $= Just textureTank
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renderPrimitive Quads $ do
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texCoord $ TexCoord2 (0 :: GLfloat) (0 :: GLfloat)
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vertex $ Vertex2 (-0.5 :: GLfloat) (-0.5 :: GLfloat)
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texCoord $ TexCoord2 (0 :: GLfloat) (1 :: GLfloat)
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vertex $ Vertex2 (-0.5 :: GLfloat) (0.5 :: GLfloat)
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texCoord $ TexCoord2 (1 :: GLfloat) (1 :: GLfloat)
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vertex $ Vertex2 (0.5 :: GLfloat) (0.5 :: GLfloat)
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texCoord $ TexCoord2 (1 :: GLfloat) (0 :: GLfloat)
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vertex $ Vertex2 (0.5 :: GLfloat) (-0.5 :: GLfloat)
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rotate (rotAim-rotDir) $ Vector3 0 0 (1 :: GLfloat)
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textureBinding Texture2D $= Just textureCannon
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renderPrimitive Quads $ do
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texCoord $ TexCoord2 (0 :: GLfloat) (0 :: GLfloat)
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vertex $ Vertex2 (-0.5 :: GLfloat) (-0.5 :: GLfloat)
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texCoord $ TexCoord2 (0 :: GLfloat) (1 :: GLfloat)
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vertex $ Vertex2 (-0.5 :: GLfloat) (0.5 :: GLfloat)
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texCoord $ TexCoord2 (1 :: GLfloat) (1 :: GLfloat)
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vertex $ Vertex2 (0.5 :: GLfloat) (0.5 :: GLfloat)
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texCoord $ TexCoord2 (1 :: GLfloat) (0 :: GLfloat)
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vertex $ Vertex2 (0.5 :: GLfloat) (-0.5 :: GLfloat)
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fromReal :: (Real a, Fractional b) => a -> b
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fromReal = fromRational . toRational |