Clock
A simple clock for keeping track of simulated time.
// Create a clock that loops on Christmas day 2013 and runs in real-time.
const clock = new Clock({
startTime : JulianDate.fromIso8601("2013-12-25"),
currentTime : JulianDate.fromIso8601("2013-12-25"),
stopTime : JulianDate.fromIso8601("2013-12-26"),
clockRange : ClockRange.LOOP_STOP,
clockStep : ClockStep.SYSTEM_CLOCK_MULTIPLIER
});See also
Properties
Indicates whether Clock.tick can advance time. This could be false if data is being buffered, for example. The clock will only advance time when both Clock.canAnimate and Clock.shouldAnimate are true.
Determines how the clock should behave when Clock.startTime or Clock.stopTime is reached.
Determines if calls to Clock.tick are frame dependent or system clock dependent. Changing this property to ClockStep.SYSTEM_CLOCK will set Clock.multiplier to 1.0, Clock.shouldAnimate to true, and Clock.currentTime to the current system clock time.
The current time. Changing this property will change Clock.clockStep from ClockStep.SYSTEM_CLOCK to ClockStep.SYSTEM_CLOCK_MULTIPLIER.
Gets or sets how much time advances when Clock.tick is called. Negative values allow for advancing backwards. If Clock.clockStep is set to ClockStep.TICK_DEPENDENT, this is the number of seconds to advance. If Clock.clockStep is set to ClockStep.SYSTEM_CLOCK_MULTIPLIER, this value is multiplied by the elapsed system time since the last call to Clock.tick. Changing this property will change Clock.clockStep from ClockStep.SYSTEM_CLOCK to ClockStep.SYSTEM_CLOCK_MULTIPLIER.
An Event that is fired whenever Clock.stopTime is reached.
An Event that is fired whenever Clock.tick is called.
Indicates whether Clock.tick should attempt to advance time. The clock will only advance time when both Clock.canAnimate and Clock.shouldAnimate are true. Changing this property will change Clock.clockStep from ClockStep.SYSTEM_CLOCK to ClockStep.SYSTEM_CLOCK_MULTIPLIER.
The start time of the clock.
The stop time of the clock.
Functions
Advances the clock from the current time based on the current configuration options. tick should be called every frame, regardless of whether animation is taking place or not. To control animation, use the Clock.shouldAnimate property.