From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932876AbXCNTNe (ORCPT ); Wed, 14 Mar 2007 15:13:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932879AbXCNTNe (ORCPT ); Wed, 14 Mar 2007 15:13:34 -0400 Received: from ik-out-1112.google.com ([66.249.90.176]:20946 "EHLO ik-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932876AbXCNTNd convert rfc822-to-8bit (ORCPT ); Wed, 14 Mar 2007 15:13:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=oqS/1mksuQK3lWcSmZtaORZXGiT10tNPcNRxnRUp+eE2t669lhMIrekkGjWb5RWiLe2stgdPzljGPsCXtHaeejABOODgHaRPKXIrrMRaorUOZAF/xU8thTEfp/Y2cShuhDP0rH/j69agF6vycrdkLFSmi/MTEGtEpnZkg6814B4= Message-ID: Date: Wed, 14 Mar 2007 15:13:31 -0400 From: "Dmitry Torokhov" To: "=?ISO-8859-1?Q?STenyaK_(Bruno_Gonz=E1lez)?=" Subject: Re: FF layer restrictions [Was: [PATCH 1/1] Input: add sensable phantom driver] Cc: "Anssi Hannula" , "Jiri Slaby" , "johann deneux" , "Linux kernel mailing list" , linux-input@atrey.karlin.mff.cuni.cz In-Reply-To: <8e4ff20a0703141147n4b690ab8g4cc8138d1ecc94e1@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT Content-Disposition: inline References: <2460126662758025813@fi.muni.cz> <45EEEAA3.50009@gmail.com> <4af2d03a0703130919nb4893b1ja9ec795dcf4bf53c@mail.gmail.com> <38b3b7c0703131450v2646e63fj2be4b9dda7f928c0@mail.gmail.com> <45F722CE.9000602@gmail.com> <45F82626.8000108@gmail.com> <45F83930.4060401@gmail.com> <8e4ff20a0703141147n4b690ab8g4cc8138d1ecc94e1@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 3/14/07, STenyaK (Bruno González) wrote: > > > On 3/14/07, Anssi Hannula wrote: > > >> Do we have any idea if there any users of FF out there? > > > > > > At least me :). I'm using it for wheel and joystick in modules for > locally > > > developped multiplatform virtual reality system. > > > > Wine and BZflag come to mind, though I think the support is quite > > limited in both. > > > > There's also vDrift (racing sim), they added support very recently. > I plan to add it in my car sim too, but there's still nothing coded. > > I have a question: if the force is to be 3D, why only 3 possible values? > What would they be, 3 torques or 3 forces? In the case of car sims (ff > steering wheels), only one axis of torque is usually used (except for 6 dof > platforms, as mentioned). > I wonder if we could somehow extend or augment FF envelope se we could specify a plane for the effect.. Then a vector could be represented by a sum 3 constant effects in 3 separate planes and we could also use spring and other effects as well. > By the way, is this the correct list for asking trivial questions (such as > questions about how the ff api works), or is it only for development of > kernel? Since it is kernel-provided API linux-input list should be fine and I think linux-kernel as well. -- Dmitry