working on examples

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nek0 2017-09-21 07:17:39 +02:00
parent cec138f9f9
commit 21bd38bc0a
6 changed files with 504 additions and 0 deletions

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@ -16,3 +16,9 @@ you will need some unstable libraries in your sandbox:
* [babl](https://github.com/nek0/babl)
all other dependencies should be installable through cabal.
## Building end Executing
invoke `cabal build` and ignore the warnings…
The latest experiment can be seen by invoking `./dist/build/hw/hw`

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examples/example00/Init.hs Normal file
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{-# LANGUAGE OverloadedStrings, RecordWildCards #-}
module Init where
import SDL (($=))
import qualified SDL
import qualified Graphics.Rendering.OpenGL as GL
import qualified Graphics.GLUtil as GLU
import qualified Data.ByteString as BS
import System.Random (randomRIO)
import Physics.Bullet.Raw
import Codec.Wavefront
import Linear as L
import SpatialMath
import Foreign
import Util
import Types
load :: IO StateData
load = do
_ <- SDL.setMouseLocationMode SDL.RelativeLocation
GL.depthFunc $= Just GL.Less
eobj <- fromFile "assets/ships/jaeger/jaeger.obj"
let obj = case eobj of
Right o -> o
Left err -> error err
-- (ptr, len) <- objLocsToPtr obj
-- (tptr, tlen) <- objUVsToPtr obj
let lobj = loadObj obj
shipBO <- GL.genObjectName
GL.bindVertexArrayObject $= Just shipBO
verts <- GL.genObjectName
GL.bindBuffer GL.ArrayBuffer $= Just verts
withArray (loTriangles lobj) $ \ptr ->
GL.bufferData GL.ArrayBuffer $=
( fromIntegral $ length (loTriangles lobj) * 3 * sizeOf (0 :: Double)
, ptr
, GL.StaticDraw
)
GL.vertexAttribPointer (GL.AttribLocation 0) $=
( GL.ToFloat
, GL.VertexArrayDescriptor 4 GL.Float 0 (plusPtr nullPtr 0)
)
GL.vertexAttribArray (GL.AttribLocation 0) $= GL.Enabled
texture <- GL.genObjectName
GL.bindBuffer GL.ArrayBuffer $= Just texture
maybe (return ()) (\a -> withArray a $ \ptr ->
GL.bufferData GL.ArrayBuffer $=
( fromIntegral $ length a * 2 * sizeOf (0 :: Double)
, ptr
, GL.StaticDraw
)) (loTexTri lobj)
GL.vertexAttribPointer (GL.AttribLocation 1) $=
( GL.ToFloat
, GL.VertexArrayDescriptor 2 GL.Float 0 (plusPtr nullPtr 0)
)
GL.vertexAttribArray (GL.AttribLocation 1) $= GL.Enabled
GL.texture GL.Texture2D $= GL.Enabled
GL.activeTexture $= GL.TextureUnit 0
t <- loadTex "assets/ships/jaeger/jaeger.texture.tga"
GL.textureBinding GL.Texture2D $= Just t
let vertexShader = foldl BS.append BS.empty
[ "attribute vec3 coord3d;"
, "attribute vec2 texcoord;"
, "uniform mat4 mvp;"
, "varying vec2 f_texcoord;"
, "void main(void) {"
, " gl_Position = mvp * vec4(coord3d, 1.0);"
, " f_texcoord = texcoord;"
, "}"
]
fragmentShader = foldl BS.append BS.empty
[ "varying vec2 f_texcoord;"
, "uniform sampler2D texture;"
, "void main(void) {"
, " vec2 flip = vec2(f_texcoord.x, 1.0 - f_texcoord.y);"
, " gl_FragColor = texture2D(texture, flip);"
, "}"
]
p <- GLU.simpleShaderProgramBS vertexShader fragmentShader
poss <- mapM (\_ -> do
x <- randomRIO (-50, 50)
y <- randomRIO (-50, 50)
z <- randomRIO (-50, 50)
return (V3 x y z)
) [0..2000]
let shipList = map (uncurry $ Ship shipBO (length $ loTriangles lobj)) $
zip poss (repeat $ Quaternion 1 (V3 0 0 0))
-- [ (V3 0 0 0, Quaternion 1 (V3 0 0 0))
-- -- , (V3 3 0 0, Quaternion 1 (V3 0 0 0))
-- ]
phys <- initPhysics
po <- initPhysicsObjects poss
mapM_ (addRigidBody (pWorld phys)) (map bodyRigidBody (poBalls po))
addRigidBody (pWorld phys) (bodyRigidBody $ poGround po)
return StateData
{ ships = shipList
, proj = perspective (pi/2) (1600 / 900) 1 (-1)
, camera = Camera
{ cameraFocus = V3 0 0 0
, cameraRot = Euler 0 0 0
, cameraDist = (-50)
}
, program = p
, physics = phys
, physicsObjects = po
}
loadTex :: FilePath -> IO GL.TextureObject
loadTex f = do
t <- either error id <$> GLU.readTexture f
GL.textureFilter GL.Texture2D $= ((GL.Linear', Nothing), GL.Linear')
GLU.texture2DWrap $= (GL.Repeated, GL.ClampToEdge)
return t
initPhysics :: IO Physics
initPhysics = do
bp <- newDbvtBroadphase
config <- newDefaultCollisionConfiguration
disp <- newCollisionDispatcher config
solver <- newSequentialImpulseConstraintSolver
world <- newDiscreteDynamicsWorld disp bp solver config
setGravity world (V3 0 (-10) 0)
return $ Physics bp config disp solver world
initPhysicsObjects :: [V3 Float] -> IO PhysicsObjects
initPhysicsObjects poss = do
ground <- newStaticPlaneShape (V3 0 1 0) 1
ball <- newSphereShape 3
groundMotionState <- newDefaultMotionState (Quaternion 1 (V3 0 0 0)) (V3 0 (-51) 0)
groundBody <- newRigidBody 0 groundMotionState 0.9 0.5 ground (V3 0 0 0)
balls <- mapM (\pos -> do
ballMotionState <- newDefaultMotionState (Quaternion 1 (V3 0 0 0))
(fmap realToFrac pos)
localInertia <- calculateLocalInertia ball 1 (V3 0 0 0)
ballBody <- newRigidBody 1 ballMotionState 0.9 0.5 ball localInertia
return $ PhysBody ball ballMotionState ballBody
) poss
return PhysicsObjects
{ poGround = PhysBody ground groundMotionState groundBody
, poBalls = balls
}

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examples/example00/Main.hs Normal file
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{-# LANGUAGE OverloadedStrings, RecordWildCards #-}
module Main where
import Affection
import SDL (($=))
import qualified SDL
import qualified Graphics.Rendering.OpenGL as GL
import qualified Graphics.GLUtil as GLU
import Physics.Bullet.Raw
import Control.Monad (when)
import Linear as L
import System.Random (randomRIO)
import SpatialMath
import Init
import Types
import Debug.Trace as T
main :: IO ()
main =
withAffection AffectionConfig
{ initComponents = All
, windowTitle = "hw"
, windowConfig = SDL.defaultWindow
{ windowInitialSize = SDL.V2 1600 900
, windowOpenGL = Just SDL.defaultOpenGL
{ SDL.glProfile = SDL.Core SDL.Normal 3 2
}
}
, initScreenMode = SDL.Fullscreen
, preLoop = return ()
, eventLoop = handle
, updateLoop = update
, drawLoop = draw
, loadState = load
, cleanUp = const (return ())
, canvasSize = Nothing
}
update :: Double -> Affection StateData ()
update dt = do
sd <- getAffection
let phys = physics sd
physos = physicsObjects sd
liftIO $ stepSimulation (pWorld phys) dt 10 Nothing
posrots <- mapM (\ball -> do
ms <- liftIO $ getMotionState ball
npos <- liftIO $ return . fmap realToFrac =<< getPosition ms
nrot <- liftIO $ return . fmap realToFrac =<< getRotation ms
return (npos, nrot)
) (map bodyRigidBody $ poBalls physos)
let nships = map (\(ship, (pos, rot)) ->
ship
{ shipRot = rot
, shipPos = pos
}
) (zip (ships sd) posrots)
putAffection sd
{ ships = nships
}
draw :: Affection StateData ()
draw = do
GL.viewport $= (GL.Position 0 0, GL.Size 1600 900)
(StateData{..}) <- getAffection
GL.currentProgram $= (Just . GLU.program $ program)
mapM_ (\(Ship{..}) -> do
let view = lookAt
(cameraFocus camera +
(rotVecByEulerB2A
(cameraRot camera)
(V3 0 0 (-cameraDist camera))))
(cameraFocus camera)
(V3 0 1 0)
model = mkTransformation shipRot shipPos
pvm = proj !*! view !*! model
liftIO $ GLU.setUniform program "mvp" pvm
GL.bindVertexArrayObject $= Just shipVao
liftIO $ GL.drawArrays GL.Triangles 0 (fromIntegral shipVaoLen)
) ships
handle :: SDL.EventPayload -> Affection StateData ()
handle (SDL.WindowClosedEvent _) = quit
handle (SDL.KeyboardEvent dat) = do
let key = SDL.keysymKeycode (SDL.keyboardEventKeysym dat)
when (SDL.keyboardEventKeyMotion dat == SDL.Pressed) $
handleKey key
handle (SDL.MouseMotionEvent dat) = do
sd <- getAffection
let (V2 rx ry) = fmap fromIntegral $ SDL.mouseMotionEventRelMotion dat
c = camera sd
putAffection sd
{ camera =
case SDL.mouseMotionEventState dat of
[SDL.ButtonRight] ->
let (V3 sx sy sz) = rotVecByEuler (cameraRot c) (V3 (rx / 10) 0 (ry / 10))
in c {cameraFocus = cameraFocus c + V3 (sx) 0 (sy)}
[] ->
let dphi = pi / 4 / 45 / 10
(Euler yaw pitch roll) = cameraRot c
nangle
| nangle' >= qc = qc - mu
| nangle' <= -qc = -qc + mu
| otherwise = nangle'
where
nangle' = (dphi * ry) + roll
qc = pi / 2
mu = 0.01
nrot =
Euler
yaw
(pitch + (rx * dphi))
nangle
in c
{ cameraRot = nrot
}
_ ->
c
}
handle _ = return ()
handleKey :: SDL.Keycode -> Affection StateData ()
handleKey code
| code == SDL.KeycodeR =
GL.clearColor $= GL.Color4 1 0 0 1
| code == SDL.KeycodeG =
GL.clearColor $= GL.Color4 0 1 0 1
| code == SDL.KeycodeB =
GL.clearColor $= GL.Color4 0 0 1 1
| code == SDL.KeycodeP = do
r <- liftIO $ randomRIO (0, 1)
g <- liftIO $ randomRIO (0, 1)
b <- liftIO $ randomRIO (0, 1)
a <- liftIO $ randomRIO (0, 1)
GL.clearColor $= GL.Color4 r g b a
| code == SDL.KeycodeEscape =
quit
| code == SDL.KeycodeF = do
dt <- deltaTime <$> get
liftIO $ putStrLn $ show (1 / dt) ++ " FPS"
| code == SDL.KeycodeT =
toggleScreen
| code `elem`
[ SDL.KeycodeW
, SDL.KeycodeS
, SDL.KeycodeA
, SDL.KeycodeD
, SDL.KeycodeQ
, SDL.KeycodeE
]
= do
sd <- getAffection
let ship = ships sd !! 0
rot = shipRot ship
dphi = pi / 2 / 45
nquat = case code of
SDL.KeycodeW -> rot * axisAngle (V3 1 0 0) (-dphi)
SDL.KeycodeS -> rot * axisAngle (V3 1 0 0) dphi
SDL.KeycodeA -> rot * axisAngle (V3 0 1 0) (-dphi)
SDL.KeycodeD -> rot * axisAngle (V3 0 1 0) dphi
SDL.KeycodeE -> rot * axisAngle (V3 0 0 1) (-dphi)
SDL.KeycodeQ -> rot * axisAngle (V3 0 0 1) dphi
_ -> rot
putAffection sd
{ ships = ship
{ shipRot = nquat
} : tail (ships sd)
}
| otherwise =
return ()

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{-# LANGUAGE OverloadedStrings, RecordWildCards #-}
module Types where
import qualified Graphics.Rendering.OpenGL as GL
import qualified Graphics.GLUtil as GLU
import Linear as L
import SpatialMath
import Physics.Bullet.Raw as Bullet
data StateData = StateData
{ ships :: [Ship]
, camera :: Camera
, proj :: M44 Float
, program :: GLU.ShaderProgram
, physics :: Physics
, physicsObjects :: PhysicsObjects
}
data Ship = Ship
{ shipVao :: GL.VertexArrayObject
, shipVaoLen :: Int
, shipPos :: V3 Float
, shipRot :: Quaternion Float
}
data Camera = Camera
{ cameraFocus :: V3 Float
, cameraRot :: Euler Float
, cameraDist :: Float
}
data Physics = Physics
{ pBroadphase :: DbvtBroadphase
, pConfig :: DefaultCollisionConfiguration
, pDispatcher :: CollisionDispatcher
, pSolver :: SequentialImpulseConstraintSolver
, pWorld :: DiscreteDynamicsWorld
}
data PhysicsObjects = PhysicsObjects
{ poGround :: PhysBody StaticPlaneShape
, poBalls :: [PhysBody SphereShape]
}
data PhysBody a = PhysBody
{ bodyShape :: a
, bodyMotionState :: MotionState
, bodyRigidBody :: RigidBody
}

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module Util where
import Codec.Wavefront
import Control.Monad (sequence)
import qualified Data.Vector as V
data LoadedObject = LoadedObject
{ loTriangles :: [Float]
, loLines :: [Float]
, loPoints :: [Float]
, loTexTri :: Maybe [Float]
}
loadObj :: WavefrontOBJ -> LoadedObject
loadObj obj =
LoadedObject ts ls ps tritex
where
inter = objLocations obj
interTex = objTexCoords obj
faces = map elValue (V.toList $ objFaces obj)
lns = map elValue (V.toList $ objLines obj)
points = map elValue (V.toList $ objPoints obj)
deface (Face a b c []) =
map (\i -> inter V.! (faceLocIndex i -1)) [a, b, c]
deface _ =
error "loadObj: obj with quads encountered"
deline (Line a b) =
map (\i -> inter V.! (lineLocIndex i -1)) [a, b]
depoint (Point i) = inter V.! (i - 1)
tsLocs = concatMap deface faces
lsLocs = concatMap deline lns
psLocs = map depoint points
deLoc (Location x y z w) = [x, y, z, w]
deTex (TexCoord r s _) = [r, s]
ts = concatMap deLoc tsLocs
ls = concatMap deLoc lsLocs
ps = concatMap deLoc psLocs
defaceTex :: Face -> Maybe [TexCoord]
defaceTex (Face a b c []) =
mapM
(fmap (\x -> interTex V.! (x - 1)) . faceTexCoordIndex)
[a, b, c]
defaceTex _ =
error "loadObj: obj with quads encountered"
tritex :: Maybe [Float]
tritex = concatMap deTex <$> mftxs
mftxs :: Maybe [TexCoord]
mftxs = fmap concat (mapM defaceTex faces)
-- objLocsToPtr :: WavefrontOBJ -> IO (Ptr Float, Int)
-- objLocsToPtr obj = do
-- let ivs = objLocations obj
-- faces = map elValue $ V.toList $ objFaces obj
-- vs = concatMap
-- (\(Face a b c []) ->
-- map (\i -> ivs V.! ((faceLocIndex i) - 1)) [a, b, c])
-- faces
-- ptr <- newArray $ concatMap (\(Location x y z w) -> [x, y, z, w]) vs
-- return (ptr, length vs)
--
-- objUVsToPtr :: WavefrontOBJ -> IO (Ptr Float, Int)
-- objUVsToPtr obj = do
-- let uvs= V.toList $ objTexCoords obj
-- ptr <- newArray $ concatMap (\(TexCoord r s t) -> [r, s, t]) uvs
-- return (ptr, length uvs)

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@ -39,3 +39,35 @@ executable hw
default-language: Haskell2010
ghc-options: -Wall
extra-libraries: stdc++
flag examples
description: Build testing examples
default: False
executable example00
main-is: Main.hs
other-modules: Util
, Types
, Init
-- other-extensions:
default-extensions: OverloadedStrings
if flag(examples)
build-depends: base >=4.9
, affection
, sdl2
, linear
, spatial-math
, bytestring
, OpenGL
, OpenGLRaw
, GLUtil
, random
, vector
, wavefront
, shoot
else
buildable: False
hs-source-dirs: examples/example00
default-language: Haskell2010
ghc-options: -Wall
extra-libraries: stdc++