The time the latest FixedUpdate has started (Read Only). This is the time in seconds since the start of the game.
Fixed time is updated in regular intervals (equal to fixedDeltaTime) until timeAsDouble property is reached. Double precision version of fixedTime. This offers more precision than a float or single value, particularly over extended periods of real-world time. In almost all cases, choose the fixedTimeAsDouble equivalent over fixedTime.