From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: "Jeffrey R. Carter" Newsgroups: comp.lang.ada Subject: Re: Roundtrip latency problem using Gnoga, on Linux, when testing at localhost address Date: Thu, 31 Mar 2016 13:46:23 -0700 Organization: Also freenews.netfront.net; news.tornevall.net; news.eternal-september.org Message-ID: References: <8f3d3515-aa1a-4d7c-b465-3ad25c902ae5@googlegroups.com> <2fa7a9d8-57c6-4a9f-a81f-7f341da17cb8@googlegroups.com> <98a18cc7-41f7-4ea7-94c3-fd1e82cb6ff5@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Injection-Date: Thu, 31 Mar 2016 20:43:11 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="48b46be33beed75863f69afa437f956b"; logging-data="26075"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/gqeGOrvPfpm1SWvMxssC+jvxG0YZ2rE8=" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 In-Reply-To: <98a18cc7-41f7-4ea7-94c3-fd1e82cb6ff5@googlegroups.com> X-Mozilla-News-Host: news://freenews.netfront.net Cancel-Lock: sha1:ZtX6/8coYV7Xkg16aheftPk75mA= Xref: news.eternal-september.org comp.lang.ada:29943 Date: 2016-03-31T13:46:23-07:00 List-Id: On 03/31/2016 09:39 AM, Olivier Henley wrote: > > 33.3 ms gives you a 30 fps game which is standard and noticeable. > 16.6 ms gives you a 60 fps game which is the quality standard. The extent to which it is noticeable is still a debate. > > That said, a multiplayer game can tolerate more or less 150 ms maximum roundtrip and for this to be acceptable it has to implement Client-Side Prediction, Server Reconciliation, Entity Interpolation and Lag Compensation. PAL TV was 25 fps, or 40 ms/frame. Film movies are shot at 24 fps, or 41.7 ms/frame. Silent movies were shot at 18 fps, or 55.6 ms/frame. Traditional, hand-drawn animation is shot at 12 fps, or 83.3 ms/frame, and looks fine (see "Fantasia" for an example). Anything under 100 ms/frame will look smooth. Still, I can see how 80 ms on the local machine might be a concern if the intention is for this to work over the internet. -- Jeff Carter "My little plum, I am like Robin Hood. I take from the rich, and I give to the poor. ... Us poor." Poppy 96