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module Render ( setup
, render
) where
import Game
import MainLoop
import Level
import Player
import Tank
import Texture
import Model
import qualified Vector as V
import Control.Monad.State
import Data.Fixed
import Data.Maybe
import Data.Obj3D
import Data.Obj3D.OpenGL
import Data.Ratio
import qualified Data.Map as M
import Bindings.GLPng
import Graphics.Rendering.OpenGL.GL (($=), GLfloat, GLdouble, Capability(..), Vector3(..), Vertex2(..), Vertex4(..))
import Graphics.Rendering.OpenGL.GL.BeginEnd (unsafeRenderPrimitive, PrimitiveMode(..))
import Graphics.Rendering.OpenGL.GL.CoordTrans
import Graphics.Rendering.OpenGL.GL.Colors
import Graphics.Rendering.OpenGL.GL.Framebuffer (clear, ClearBuffer(..))
import Graphics.Rendering.OpenGL.GL.PerFragment (blend, blendFunc, BlendingFactor(..), depthFunc, ComparisonFunction(..))
import Graphics.Rendering.OpenGL.GL.Texturing.Application (texture)
import Graphics.Rendering.OpenGL.GL.Texturing.Objects (textureBinding, TextureObject(..))
import Graphics.Rendering.OpenGL.GL.Texturing.Parameters (Repetition(..), Clamping(..), TextureFilter(..), MinificationFilter, MagnificationFilter)
import Graphics.Rendering.OpenGL.GL.Texturing.Specification (TextureTarget(..))
import Graphics.Rendering.OpenGL.GL.VertexArrays (clientState, ClientArrayType(..))
import Graphics.Rendering.OpenGL.GL.VertexSpec
getTexture :: Texture -> Main TextureObject
getTexture t = do
ts <- gets textures
let tobj = M.lookup t ts
if (isJust tobj)
then
return $ fromJust tobj
else do
path <- liftIO $ texturePath t
tex <- liftIO $ pngBind path BuildMipmap Alpha (Repeated, Repeat) (Linear', Just Linear') Linear' >>= return . TextureObject . fromIntegral . fst
modify $ \state -> state {textures = M.insert t tex ts}
return tex
getModel :: Model -> Main InterleavedObj
getModel m = do
ms <- gets models
let mobj = M.lookup m ms
if (isJust mobj)
then
return $ fromJust mobj
else do
path <- liftIO $ modelPath m
objmod <- liftIO $ loadObjFile path
model <- case objmod of
Left error -> fail $ show error
Right obj -> liftIO $ makeInterleavedArrays obj
modify $ \state -> state {models = M.insert m model ms}
return model
setup :: Main ()
setup = do
(lw, lh) <- gets (level . gameState) >>= \l -> return (fromIntegral . levelWidth $ l :: GLfloat, fromIntegral . levelHeight $ l :: GLfloat)
liftIO $ do
blend $= Enabled
blendFunc $= (SrcAlpha, OneMinusSrcAlpha)
depthFunc $= Just Lequal
shadeModel $= Smooth
lighting $= Enabled
light (Light 0) $= Enabled
position (Light 0) $= Vertex4 (-1) (-1) 1.5 (0 :: GLfloat)
colorMaterial $= Just (Front, AmbientAndDiffuse)
clientState VertexArray $= Enabled
clientState NormalArray $= Enabled
clientState TextureCoordArray $= Enabled
-- cache textures & models
getTexture TextureWood
getTexture TextureTank
getTexture TextureCannon
getTexture TextureBullet
getTexture TextureCrosshair
getModel ModelTank
getModel ModelBullet
getModel ModelBlock
return ()
render :: Main ()
render = do
tanklist <- gets $ tanks . gameState
bulletlist <- gets $ bullets . gameState
playerlist <- gets players
textureWood <- getTexture TextureWood
textureTank <- getTexture TextureTank
textureCannon <- getTexture TextureCannon
textureBullet <- getTexture TextureBullet
textureCrosshair <- getTexture TextureCrosshair
modelTank <- getModel ModelTank
modelBullet <- getModel ModelBullet
modelBlock <- getModel ModelBlock
(lw, lh) <- gets (level . gameState) >>= \l -> return (fromIntegral . levelWidth $ l :: GLfloat, fromIntegral . levelHeight $ l :: GLfloat)
liftIO $ do
clear [ColorBuffer, DepthBuffer]
depthFunc $= Just Lequal
texture Texture2D $= Enabled
textureBinding Texture2D $= Just textureWood
normal $ Normal3 0 0 (1 :: GLfloat)
unsafeRenderPrimitive Quads $ do
texCoord $ TexCoord2 (-0.5 :: GLfloat) (-0.5 :: GLfloat)
vertex $ Vertex2 (-1) (lh+1)
texCoord $ TexCoord2 (lw/2+0.5) (-0.5)
vertex $ Vertex2 (lw+1) (lh+1)
texCoord $ TexCoord2 (lw/2+0.5) (lh/2+0.5)
vertex $ Vertex2 (lw+1) (-1)
texCoord $ TexCoord2 (-0.5) (lh/2+0.5)
vertex $ Vertex2 (-1 :: GLfloat) (-1 :: GLfloat)
bindInterleavedArrays modelTank
forM_ tanklist $ \tank -> unsafePreservingMatrix $ do
let x = realToFrac . tankX $ tank
y = realToFrac . tankY $ tank
rotDir = realToFrac . V.toAngle . tankDir $ tank
rotAim = realToFrac . V.toAngle . tankAim $ tank
translate $ Vector3 x y (0 :: GLfloat)
rotate (rotDir*180/pi) $ Vector3 0 0 (1 :: GLfloat)
textureBinding Texture2D $= Just textureTank
unsafePreservingMatrix $ do
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelTank 1
rotate ((rotAim-rotDir)*180/pi) $ Vector3 0 0 (1 :: GLfloat)
textureBinding Texture2D $= Just textureCannon
unsafePreservingMatrix $ do
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelTank 0
texture Texture2D $= Disabled
bindInterleavedArrays modelBullet
forM_ bulletlist $ \bullet -> unsafePreservingMatrix $ do
let x = realToFrac . bulletX $ bullet
y = realToFrac . bulletY $ bullet
rotDir = realToFrac . V.toAngle . bulletDir $ bullet
translate $ Vector3 x y (0.25 :: GLfloat)
rotate ((rotDir*180/pi)-90) $ Vector3 0 0 (1 :: GLfloat)
unsafePreservingMatrix $ do
drawObject modelBullet 0
bindInterleavedArrays modelBlock
texture Texture2D $= Enabled
textureBinding Texture2D $= Just textureWood
forM_ [0.5..13.5] $ \x -> unsafePreservingMatrix $ do
translate $ Vector3 x 8.5 (0.5 :: GLfloat)
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelBlock 0
forM_ [0.5..13.5] $ \x -> unsafePreservingMatrix $ do
translate $ Vector3 x (-0.5) (0.5 :: GLfloat)
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelBlock 0
forM_ [-0.5..8.5] $ \y -> unsafePreservingMatrix $ do
translate $ Vector3 (-0.5) y (0.5 :: GLfloat)
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelBlock 0
forM_ [-0.5..8.5] $ \y -> unsafePreservingMatrix $ do
translate $ Vector3 14.5 y (0.5 :: GLfloat)
rotate 90 $ Vector3 1 0 (0 :: GLfloat)
drawObject modelBlock 0
depthFunc $= Just Always
textureBinding Texture2D $= Just textureCrosshair
forM_ playerlist renderPlayer
|
