linux-kernel - FF layer restrictions [Was: [PATCH 1/1] Input: add sensable phantom driver]

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Date:	Tue, 13 Mar 2007 23:16:46 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	johann deneux <johann.deneux@...il.com>
CC:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	linux-input@...ey.karlin.mff.cuni.cz,
	"Anssi Hannula" <anssi.hannula@...il.com>
Subject: FF layer restrictions [Was: [PATCH 1/1] Input: add sensable phantom
 driver]

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...

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
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