Contents Index

Graphics.Plot.Animate

Description

Implements callbacks and state used to draw animated pictures.

Synopsis

data AnimateState = AnimateState { stateAnimate :: Bool stateAnimateStart :: Bool stateAnimateTime :: Int stateDisplayTime :: Int stateDisplayTimeLast :: Int stateDisplayTimeClamp :: Int stateGateTimeStart :: Int stateGateTimeEnd :: Int stateGateTimeElapsed :: Int } controlAnimate :: IORef AnimateState -> [Callback] animateBegin :: IORef AnimateState -> IO () animateEnd :: IORef AnimateState -> IO ()

Documentation

data AnimateState

Animation State Constructors AnimateState stateAnimate :: Bool Whether to call the user's draw repetedly to get an animation. stateAnimateStart :: Bool Whether this is the first frame of the animation. stateAnimateTime :: Int Number of msec the animation has been running for stateDisplayTime :: Int The time when we entered the display callback for the current frame. stateDisplayTimeLast :: Int stateDisplayTimeClamp :: Int Clamp the minimum time between frames to this value (in msec) Most LCD monitors refresh at around 50Hz so setting this to < 20msec probably isn't worthwhile. stateGateTimeStart :: Int The time when the last call to the users render function finished. stateGateTimeEnd :: Int The time when displayInWindow last finished (after sleeping to clamp fps). stateGateTimeElapsed :: Int How long it took to draw this frame

controlAnimate :: IORef AnimateState -> [Callback]

Callbacks used to run/stop the animation via the keyboard.

animateBegin :: IORef AnimateState -> IO ()

Handles animation timing details. Call this function at the start of each frame.

animateEnd :: IORef AnimateState -> IO ()

Handles animation timing details. Call this function at the end of each frame.

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