Dmitry Torokhov napsal(a): > On 3/13/07, Jiri Slaby <[EMAIL PROTECTED]> wrote: >> Why did you remove all Cced people? Anyway I filtered some of them out >> >> johann deneux napsal(a): >> > You are right, the direction in ff_effect is meant to be an angle. >> > A dirty solution would be to use the 16 bits as two 8-bits angles. Or >> >> That would be a problem as I need 3x 16bits. >> >> > maybe we should change the API. I don't think there are many >> > applications using force feedback yet, so maybe that should be ok? >> > >> > If we change the API, we should remove the assumption that a device has >> > at most two axes to render effects. We could for instance have a >> > magnitude argument for each axis which is capable of rendering effects. >> > That might be necessary even for more common gaming devices like racing >> > wheels: One can think pedals could also be capable of force feedback >> > some day, not just the steering wheel. >> >> I can do that, but in that case, I need to know how people (especially >> those >> input one) want me to do... >> > > Since we have no idea how many programs (if any) are using force > feedback interface I would be wary of changing existing effcets and
I definitely agree. > rather add new set of 3D effects. I was thinking about having "raw" (e.g. FF_RAW) effect, which would be only X "axes"/entries of u32, where X is about 10 for future use and simply posting these values further to HW (maybe after clamping or driver specific processing) from this array. This seems to be augmentation of FF_CONSTANT but the fact, it doesn't compute forces from direction. Also yet another one such as FF_VECTOR or FF_3D could be considered as one posibility, but it's still the same -- to have no more than 3 entries to pass forces... > 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. regards, -- http://www.fi.muni.cz/~xslaby/ Jiri Slaby faculty of informatics, masaryk university, brno, cz e-mail: jirislaby gmail com, gpg pubkey fingerprint: B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
