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Question Input delay to reduce resimulations count

Discussion in 'NetCode for ECS' started by AlexandrKvitka, Aug 11, 2023.

  1. AlexandrKvitka

    AlexandrKvitka

    Joined:
    Jun 11, 2022
    Posts:
    6
    Hello.
    I have a question about implementing the input delay technique in net code for ECS.
    The main idea of this technique is to send input immediately but apply it with delay.
    I want to use it to reduce the resimulation count. Without input delay, I will have the resimulations count equal to RTT / FrameRate. But with input delay, it will be (RTT - InputDelay) / FrameRate.
    I drew a chart to show this idea.
    Can I implement it?
    Or do I need to do a custom time synchronization?
    111.png
     
    AlexandrKvitka, Aug 11, 2023
    #1

  2. NikiWalker

    NikiWalker

    Unity Technologies

    Joined:
    May 18, 2021
    Posts:
    224
    Hey Alexandr,

    Apologies, this feature - "Forced Input Latency" (used also in GGPO-style netcode) - is in our backlist, but is not currently available. You'd need to make non-trivial package modifications to expose and hook it up.
     
    NikiWalker, Aug 11, 2023
    #2

  3. AlexandrKvitka

    AlexandrKvitka

    Joined:
    Jun 11, 2022
    Posts:
    6
    Yes, this feature is used in GGPO.
    Thank you.
    How long to wait for this feature? Are there any predictions?
     
    AlexandrKvitka, Aug 11, 2023
    #3

  4. NikiWalker

    NikiWalker

    Unity Technologies

    Joined:
    May 18, 2021
    Posts:
    224
    Unfortunately no, but I've bumped the backlog priority slightly. We'll reply here once it's implemented.
     
    NikiWalker, Aug 13, 2023
    #4