KittensGame Offline Progression Toggle

Offline progression in KittensGame currently has a slight quirk to it that can be taken advantage of by toggling Offline Progression when playing on the web.

On the mobile version Offline Progression works by calculating system time since the game last updated and then fast forwarding to make up at least a portion of the progress that should have been made. This makes up for the lack of multi-tasking with background apps and closing apps when not actively looking at them.

On the web the experimental Offline Progression calculates time since the last time it was activated. This should work in conjunction with closing the tab or pausing the game, however it continues to accumulate offline time while the game is running if Offline Progression is disabled.

The normal process would be to open options, click on offline progression and then click on it a second time to turn it back off since it takes effect almost immediately. However this is ultimately inefficient when it maximizes roughly every 8 hours. Setting up an interval to trigger offline progression every 8 hours would provide close to optimal progress, reducing the interval slightly would give the added benefit of not missing any extra production due to lag, but the difference should be minimal.

var offlineHours = 8;
var hours = 60*60*1000; // milliseconds to hours

var getOfflineProduction = setInterval(runOfflineUpdate, offlineHours*hours);

// Disable with
// clearInterval(getOfflineProduction)

Offline Progress is considered redshift in the game code so toggling it on and off becomes

function runOfflineUpdate () {
    game.opts.enableRedshift = true
    game.time.calculateRedshift()
    game.ops.enableRedshift = false
}

The extra function call between turning it on and off is to ensure that it actually is calculated. If it were turned on and off in a span of time shorter than a single tick then nothing would be gained. Forcibly calling calculateRedshift() forces the game to add the production.