Path: chuka.playstation.co.uk!scea!pro1-147.barrie.connex.net!user From: skennedy@bconnex.net (Sean Kennedy) Newsgroups: scee.yaroze.freetalk.english,scea.yaroze.freetalk Subject: Re: Analog Pad w/Dual Shock, Tidbits and trips... Date: Wed, 08 Jul 1998 00:18:04 -0500 Organization: Wooden Tulip Ltd. Lines: 67 Message-ID: References: <35521D7E.D42C3393@mail.datasys.net> <3557B2D4.BFB9DAEE@ndirect.co.uk> <3558372F.B4A015F9@mail.datasys.net> <355B4FE6.1F2BEDE7@mail.datasys.net> NNTP-Posting-Host: pro1-147.barrie.connex.net Xref: chuka.playstation.co.uk scee.yaroze.freetalk.english:1371 scea.yaroze.freetalk:815 > > Nah, I prefer the way they've done it, with two *types* of vibration. > > If I'm driving along a bumpy track in a crappy C class car in Gran > > Turismo then I'll get the slow vibration from the larger motor. But > > if I scrape the wall or get nudged by another car I get a quicker > > vibration from the smaller motor. This is great, and is what enhances > > gameplay. Well, kids. Lets chat this one up shall we? Three kinds of "Shock/Force Feedback" technologies out there: In no particular order of good or bad... #1 Nintendo "Rumble Pak" {TM Nintendo} a programmable insert S/FF device that connects to the N64 Penguin controller. Pendulum Inertial device. Nominal shock effect, good rumble and shake, power hungry when used as a motor emulator. #2 The Microsoft Sidewinder{TM} Force Feedback Pro. IMHO: THE BEST S/FF JOYSTICK ON THE PLANET. If I could devise a PSX to MIDI Digital Extreme translator, Boy OH BOY! This joystick is the best. Using dual actuated Quaternion drive mechanisims this Joystick gives 3D Force Feedback a new name. Essentially the same controller used on the Airbus A320, this is worth the $150+ just to play. #3 Sony Analog Dual Shock. Listed as Item #7 instead of #5 {5 is the classic dual analog gamepad. I have one, and I don't feel I need the buy the #7 when I cannot code for it right now.} Dual shock uses on of the oldest S/FF tricks in the book. In fact Atari still had a Patent issued in the US for it, until SEGA Japan brought in the Prior Art [Since "SErvice GAmes" was an American company in the beginning] information Sony had to issue the dual analog controller Without the Dual shock feature till the patent thing was solved. The trick is as follows: 2 unbalanced Vibrator motor mounts. One large [Low Freq resonator] and one small [High freq resonator] both rotating at same speed produces no harmonics: no differential movement: only a motor emulator. {And very efficient too!} Put the motors out of sync [PWM of drive controllers] and a variety of effects can be had. Large moves fast,small moves slow: Slow Wah,Wha effect rolling between two hands. Small moves fast, large moves slow, Walking quickly effect. Now the piaze-de-resistance! : Large moves at 50%, small alternates between 48% and 52% {it is actually a heck of a lot less, but details are details..} Effect is an alternation of hammer like movements that affect left hand first, then effect hits the right hand. Literally this is the effect called the "Washing Machine Effect" History has it that in WW2 seaplanes that ran with 2 or 4 engines were extremely effective at distressing sides when the pilot ran one of the engines slower than the other, the result was a sound of a loud washing machine agitating back & forth. > Now that I think about it you're right. The hard caseing of the > controler will make it difficult to make one side vibrate and the > other to not. You are right, It makes sense now. Good example by the > way, otherwise I would still have not understood. Hmm. how conveinent the above gets said... However, it would be nice to have an interface routine "In-Line" that could give us basic access to the Dual shock. -sean