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tessellation-factor is now adaptive

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- tessellation gets reduced in distance
- tess-factor is now adaptive
This commit is contained in:
Stefan Dresselhaus
2014-05-07 09:51:35 +02:00
parent f7cc34b3a0
commit 376375008c
3 changed files with 34 additions and 10 deletions
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12
src/Main.hs
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@ -132,6 +132,7 @@ main =
}
, _io = IOState
{ _clock = now
, _tessClockFactor = 0
}
, _mouse = MouseState
{ _isDown = False
@ -234,23 +235,24 @@ run = do
targetFrametime = 1.0/targetFramerate
targetFrametimeμs = targetFrametime * 1000000.0
now <- getCurrentTime
diff <- return $ diffUTCTime now (state ^. io.clock) -- get time-diffs
title <- return $ unwords ["Pioneers @ ",show ((round . double $ 1.0/diff)::Int),"fps"]
let diff = diffUTCTime now (state ^. io.clock) -- get time-diffs
title = unwords ["Pioneers @ ",show ((round . double $ 1.0/diff)::Int),"fps"]
setWindowTitle (env ^. windowObject) title
let sleepAmount = floor ((targetFrametime - double diff)*1000000) :: Int -- get time until next frame in microseconds
clockFactor = (state ^. io.tessClockFactor)
tessChange
| (sleepAmount > (floor $0.1*targetFrametimeμs)) && (state ^. gl.glMap.stateTessellationFactor < 5) = ((+)1 :: Int -> Int)
| (clockFactor > (2*targetFrametimeμs)) && (state ^. gl.glMap.stateTessellationFactor < 5) = ((+)1 :: Int -> Int)
-- > factor < 5 & 10% of frame idle -> increase graphics
| sleepAmount < 0 && (state ^. gl.glMap.stateTessellationFactor > 1) = (flip (-) 1 :: Int -> Int)
-- frame used up completely -> decrease
| otherwise = ((+)0 :: Int -> Int) -- 0ms > x > 10% -> keep settings
when (sleepAmount > 0) $ threadDelay sleepAmount
print targetFrametimeμs
return (now,tessChange,sleepAmount)
-- set state with new clock-time
modify $ (io.clock .~ mt)
. (gl.glMap.stateTessellationFactor %~ tc)
liftIO $ putStrLn $ concat $ ["TessFactor at: ",show (state ^. gl.glMap.stateTessellationFactor), " - slept for ",show sleepAmount, "μs."]
. (io.tessClockFactor %~ (((+) (fromIntegral sleepAmount)).((*) 0.99)))
-- liftIO $ putStrLn $ concat $ ["TessFactor at: ",show (state ^. gl.glMap.stateTessellationFactor), " - slept for ",show sleepAmount, "μs."]
shouldClose' <- return $ state ^. window.shouldClose
unless shouldClose' run