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Author Topic: Understand the delta time and the new "Delta Time Clipping Tool" in

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Understand the delta time and the new "Delta Time Clipping Tool":

For those who are concerned by the delta time, Ledsmaster implements a real delta time based on "partials" and not based on trivial time balance. The time balance delta is common but not accurate enough for PRO. Partials are time measurements or time records corresponding to a part or sector of the circuit, to differentiate it from FIA official 3 sectors I call it "PARTIALS". The partials time records are compared to calculate the delta time in this particular part of the track.

Delta time is important and helps you to improve your PB and also identify the zone on the track where you are worse or good.

To work we need a lot of info from simulation API: track size, car distance traveled (based on center point of the track), speed, current lap time, last lap time, (best time can be calculated easily), FIA sectors time is an option to display additional sector delta.

The new delta time clipping tool monitors the partials crossed by the car and can warn you when 1 or more partials have been skipped and this is very IMPORTANT TO NOT HAVE ANY PARTIAL SKIPPED or just a few ones.

In General options you can define the number of partials used for delta time from 40 to 1150 and the partial size in meter (see the screenshot):
- more partials you have,
> more you divide the circuit in small parts,
> more the delta is smooth,
> more the gap between measurements is small,
> more your RIG must be strong with high FPS,
> more the simulation API must send data in high rate

Why not simply put the highest number of partials to get a very smooth delta-time and that's it!

simple, let say,
MONZA around 5700meters,
1000 partials
which result of at least 1 measure each 5meters at 150 to 300 Km/h!

is your simulation/game on your rig is capable to send to Ledsmaster all the telemetry data mentioned above each 5 meters... unfortunately not for almost all games.
So the result: is a sort of "delta time clipping" (a big gap between 2 measurements) which correspond to skip one or more partials because the partials are too small

How to solve this equation:
Decrease the number of partials to divide the circuit in bigger part and not missing a single measure!

And the result:
no "delta clipping" but if you have too few partials, you also get a big gap between each time measurements the delta time is not smooth, as well...

not simple... :)

this is the purpose of the Delta time clipping tool, to help you to adjust the number of partials depending the car, the track and obviously the simulation/game used.

In fact, the delta time clipping may occur, but not too often, so I pushed rFactor2 to 369 partials with F1 at Monza and the result is a very smooth delta time (using latest beta with rFactor delta time function 129). In F1 2013, I pushed to 1000 partials with the same combo F1/MONZA using delta time function 47. ;)


Hope this helps to understand the delta time function of Ledsmaster.



REMINDER: contact your hardware supplier/manufacturer for hardware issue, this support area is for software assistance only. Read the rules. Thank you.

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Re: Understand the delta time and the new "Delta Time Clipping Tool"
« Reply #1 on: October 15, 2014, 02:03:04 PM »
Default DELTA TIME settings are suitable for all simulation or game including rfactor2 (i.e. 16 meters for each partial which is around 300 to 400 partials on almost all GP circuits)


However, rFactor 1 send telemetry data at lower rate than rF2 and other sim so to avoid "Delta Time Clipping" the number of partials must not exceed 170, 144 partials is a safe value.
The size of each partial is big on typical GP Track it's around 35 meters so we increase here the delta time refresh rate to compensate the gap between each telemetry records, see the screenshot.

Attention, you must reset the TELEMETRY_DELTATIME_PARTIAL_SIZE to zero to indicate to Ledsmaster to take the number of partials defined (144).


REMINDER: contact your hardware supplier/manufacturer for hardware issue, this support area is for software assistance only. Read the rules. Thank you.