Monad that drives the application

Initial parameters for the Game.

Default settings. Runs in ullscreen mode.

Run the aplication. It accepts initial settings and the dynamic value of pictures wrapped in the Run monad.

Note that to work properly we need to compile to executable with options -O2 and -threaded. The function does not work in ghci or with runhaskell because it requires support for multiple threads.

Define the application with the Main module. Then compie it:

stack exec -- ghc -O2 -threaded dyna-gloss/examples/Ball.hs

And run the result:

	./dyna-gloss/examples/Ball

How it works? It runs the dynamic process at the background thread and every time the gloss function requests new frame it takes a snapshot of the current value of the main dynamic process which produces pictures. It's exactly what gloss simulation function needs to render it on the screen.

Read mouse positions. It produces dynamic of vectors. (0, 0) is a center of the screen.

Mouse velocity or displacement

Position of the mouse during drag, if no drag it becomes zero

Displacement on drag, if no drag it becomes zero

Mouse accelartion or speed of displacement

Event stream of clicks of the mouse right button

Event stream of clicks of the mouse left button

Mouse wheel displacement. If positive then it goes up, if negative then it goes down.

All sorts of clicks

Reads generic click events

Reads frame updates. Value of the event is a time that has passed since the previous frame.

Note that if we want to use the sort of event stream as a timeline for the game or simulation we can also use time utilities from the FRP library: clock, pulse, ticks, timer.

Reads window resize events

Event stream of key up actions

Event stream of key down actions

Event stream of char press up actions

Event stream of char press down actions