A convenience struct to easily measure time since an event last happened, based on RealTime.GlobalNow.
Typical usage would see you assigning 0 to a variable of this type to reset the timer. Then the struct would return time since the last reset. i.e.:
RealTimeSince lastUsed = 0;
if ( lastUsed > 10 ) { /*Do something*/ }
Time at which the timer reset happened, based on RealTime.GlobalNow.
Time passed since last reset, in seconds.