hw/examples/example03/Main.hs

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2017-11-12 16:10:47 +00:00
{-# 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 Control.Monad.IO.Class (liftIO)
import qualified Data.ByteString as BS
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
{ SDL.windowInitialSize = SDL.V2 1600 900
, SDL.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
(pos, rot) <- do
ms <- liftIO $ getMotionState (bodyRigidBody $ poBall physos)
npos <- liftIO $ return . fmap realToFrac =<< getPosition ms
nrot <- liftIO $ return . fmap realToFrac =<< getRotation ms
return (npos, nrot)
let nship =
(ship sd)
{ shipRot = rot
, shipPos = pos
}
putAffection sd
{ ship = nship
}
draw :: Affection StateData ()
draw =
do
GL.viewport $= (GL.Position 0 0, GL.Size 1600 900)
StateData{..} <- getAffection
let view = lookAt
(cameraFocus camera +
rotVecByEulerB2A
(cameraRot camera)
(V3 0 0 (-cameraDist camera)))
(cameraFocus camera)
(V3 0 1 0)
GL.currentProgram $= (Just . GLU.program $ shipProgram)
drawShip shipProgram view ship
GL.currentProgram $= (Just . GLU.program $ handleProgram)
mapM_ (drawShip shipProgram view) vertHandles
where
drawShip program view (Ship{..}) = do
StateData{..} <- getAffection
let 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)
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) = 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 body = bodyRigidBody $ poBall $ physicsObjects sd
-- ms <- liftIO $ getMotionState body
-- rot <- liftIO $ return . fmap realToFrac =<< getRotation ms
-- let tor = 5
-- torqueimp = case code of
-- SDL.KeycodeW -> rotate rot (V3 (-tor) 0 0) -- (-dphi)
-- SDL.KeycodeS -> rotate rot (V3 tor 0 0) -- dphi
-- SDL.KeycodeA -> rotate rot (V3 0 (-tor) 0) -- (-dphi)
-- SDL.KeycodeD -> rotate rot (V3 0 tor 0) -- dphi
-- SDL.KeycodeE -> rotate rot (V3 0 0 (-tor)) -- (-dphi)
-- SDL.KeycodeQ -> rotate rot (V3 0 0 tor) -- dphi
-- _ -> V3 0 0 0
-- liftIO $ applyTorqueImpulse
-- (bodyRigidBody $ poBall $ physicsObjects sd)
-- torqueimp
| otherwise =
return ()