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!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Roundtrip latency problem using Gnoga, on Linux, when testing at localhost address Date: Thu, 31 Mar 2016 23:14:15 +0200 Organization: Aioe.org NNTP Server Message-ID: References: <8f3d3515-aa1a-4d7c-b465-3ad25c902ae5@googlegroups.com> <2fa7a9d8-57c6-4a9f-a81f-7f341da17cb8@googlegroups.com> <98a18cc7-41f7-4ea7-94c3-fd1e82cb6ff5@googlegroups.com> NNTP-Posting-Host: LMk7+sG0YqgPmReI4fVkAA.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:29944 Date: 2016-03-31T23:14:15+02:00 List-Id: On 2016-03-31 22:46, Jeffrey R. Carter wrote: > 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. It is more complicated. An old TV set is not sharp. Its dithering mask work as a sort of anti-aliasing filter. The same applies to the live images, which perception is different from artificial images. E.g. running curves on a high-resolution screen without anti-aliasing appear jerking even at 20ms rate. Furthermore, jitter around 10ms is visible too. So, I understand how 80ms might become a problem. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de