Read Inputs with RAM

Retrieves new inputs with inputs.read(), converts their timestamp to the tick the game should process them on, and saves them to RAM$inputs.
If any of these new inputs should have occurred on a prior tick, rolls back to resolve the dropped input.

See vignette("inputs") for more details.

Usage

inputs.get(RAM)

Arguments

RAM

RAM object to update.

Details

New inputs are inputs which exist in inputs.csv but not in RAM$inputs.

The tick an input should occur on is calculated as:

RAM$began[2] +
ceiling(
    RAM$ROM$framerate * (
            newinputs$timestamp +
            RAM$ROM$input_delay -
            RAM$began[1]
    )
)

Where RAM$began stores the c(timestamp, tick) of the last time ram.run() was called, ROM$input_delay is the desired delay between inputting a key and when the game should register it, and ROM$framerate is the desired framerate of the game.

New inputs occurring before the last call of ram.run, i.e. those from before the game started or while the game was paused, have their tick set to -1 so they will never be registered.

Then RAM$inputs is updated to contain all the new inputs, matching inputs.csv.

Examples

#only used internally, in ram.update()