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Comment: Re:Quake's Lag (Score 4, Interesting) 88

by ejito (#21040477) Attached to: Neuro-Reckoning May Reduce MMOG Time Lag
That actually has more to do with latency than number of updates. Latency determines how long until you feel an action from that was updated to the server. If everyone has 200ms ping, then someone shoots you, and that shot is updated to the server 100ms later, then you feel the hit 100ms after that, for a total of 200ms. Within that 200ms, you'd have ample time to hide behind a box or the corner of a wall, but the server would still say you were hit (because 200ms ago you weren't behind that box or wall on your enemies computer). This retroactive update is how modern systems work, and it reduces apparent shooting lag.

Sidenote: This began the misconception that lag time benefited the lagger, or that laggy players lag the whole server, neither of which is true. The quicker your ping time, the faster your shots or actions will register on the server. If a high ping bastard and low ping bastard shoot each other at the same exact moment, the LPB will have his shot register first, and the HPB will die.

Originally, shots and hits were always done actively at the time it reached the server. So if you had 400ms ping, you'd see your gun shoot 400ms after you fired it. This made lag almost unbearable for most high ping players, because if they shot at you, they'd almost always miss, because by the time their shot registered, you would've moved out of the spot you were standing a split second ago.

As for the article, it's dealing solely with player movement on MMORPGS, which is determined by the rate of updates (how many packets get sent out per second). Player action updates are always triggered at the time of action (such as casting a spell), however, movement is an ongoing process. Basically your client updates the server around a dozen times a second with position and velocity information, because of your movement. However, it always assumes you'll stick to that velocity (moving forward? dead reckoning predicts you move forward some more) in between updates. If you deviate from your predicted movement along a velocity, you need to send an update to the server. This new method will predict what movement you'll take, rather than always assuming a straight line from your current movement.

My student ACM account doesn't have subscription to access the article, so I'm not entirely sure, but this is my take on what it does:
For instance, if you're moving forward, and there's something in front of you, the neural net will attempt to determine that you'll probably move in a different direction, and send that as your predicted velocity. If it turns out you don't move that direction, you'll simply have to send another update. If you do move that direction (which statistically you should), then there will be no need for an update, thereby saving bandwidth. These predictions and updates happen at a rate which makes it seem like your player is moving smoothly, when in reality, there's a bunch of micro deviations and stuttering.
XBox (Games)

+ - Halo 3 helps the industry

Submitted by
An anonymous reader writes "While it's obvious to see the mainstream success that Bungie's Halo 3 is bringing to the industry, other developers (and their fans) might see Halo 3 as a competitor and threat. However, an industry analyst sees it as a benefit for other large developers, such as EA, as gamers who bought the XBox 360 platform for Halo continue to buy other titles. The largest benefactor is Gamestop, who gained enormous foot traffic during the Halo launch (which will likely continue into the upcoming holiday season).

I speculate even further that the entire industry will eventually benefit: as more casual or new gamers (freshmeat) see what the hype is about, more just might stick around and buy other platforms and games. I'm fairly cynical about over-hyped advertising and platform exclusives, but I'm currently biting my tongue over Microsoft's well crafted campaign."
Sun Microsystems

+ - Sun Releasing 8-Core Niagara 2 Processor

Submitted by Anonymous Coward
An anonymous reader writes "Sun Microsystems is set to announce its eight-core Niagara 2 processor next week. Each core supports eight threads, so the chip handles 64 simultaneous threads, making it the centerpiece of Sun's "Throughput Computing" effort. Along with having more cores than the quads from Intel and AMD, the Niagara 2 have dual, on-chip 10G Ethernet ports with crytopgraphic capability. Sun doesn't get much processor press, because the chips are used only in its own CoolThreads servers, but Niagara 2 will probably be the fastest processor out there when its released, other than perhaps the also little-known 4-GHz IBM Power 6."
Security

+ - California Voting System Code Reviews Released->

Submitted by
zestyping
zestyping writes "Today, the California Secretary of State released the reports from what is probably the most comprehensive analysis of voting system source code to date. The reports cover optical scan and touchscreen voting systems by Diebold, Hart, and Sequoia that are used in many California counties.

Whereas the "red team" reports released last Friday described specific attack scenarios, these reports offer a detailed analysis of the software architecture and source code. All three reports identify significant security weaknesses in the respective systems, including susceptibility to tampering of voting machine firmware, the possibility of viral propagation, and vulnerabilities in the central election management software.

The Secretary of State has until tomorrow, August 3, to decide whether to decertify any voting systems, because she is required to give six months' notice of decertification before the California primary election next February."

Link to Original Source
The Internet

+ - The Pirate Bay About To Relaunch Suprnova.org 3

Submitted by kungfujesus
kungfujesus (969971) writes "The Pirate Bay crew has been working on this secret project for quite some time now. Back in April they wrote a cryptic post on their blog announcing that something was coming. In a response to this announcement TPB admin Brokep told TorrentFreak: "The past, the present and the future. It's all the same, but one thing's for sure, we will radiate for weeks", today it became clear that he was referring to the resurrection of Suprnova. Article Here"

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