From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dmitry Torokhov" Subject: Re: FF layer restrictions [Was: [PATCH 1/1] Input: add sensable phantom driver] Date: Wed, 14 Mar 2007 15:13:31 -0400 Message-ID: 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <8e4ff20a0703141147n4b690ab8g4cc8138d1ecc94e1@mail.gmail.com> Content-Disposition: inline Sender: owner-linux-input@atrey.karlin.mff.cuni.cz List-Help: List-Owner: List-Post: List-Unsubscribe: To: "=?ISO-8859-1?Q?STenyaK_(Bruno_Gonz=E1lez)?=" Cc: Anssi Hannula , Jiri Slaby , johann deneux , Linux kernel mailing list , linux-input@atrey.karlin.mff.cuni.cz List-Id: linux-input@vger.kernel.org On 3/14/07, STenyaK (Bruno Gonz=E1lez) 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 d= of > 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 a= s > 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. --=20 Dmitry