Re: FF layer restrictions [Was: [PATCH 1/1] Input: add sensable phantom driver]

[STenyaK (Bruno González)]

On 3/15/07, johann deneux <johann.deneux@xxxxxxxxx> wrote:
> On 3/14/07, STenyaK (Bruno González) <stenyak@xxxxxxxxx> wrote:
> > Ideally, afaik we should use:
> > -3 values for translation force (linear force): x,y,z components of
> > the force vector.
> > -4 values for rotation force (torque): x,y,z,w components of the
> > quaternion. You can also use euler angles (and i think there are
> > another one or two notations), which is just 3 values, but i'm not
> > sure it will be a correct decision (due to the gimbal lock problem,
> > which may or may not be present in ff devices, dunno).
>
> Same remark here. A torque is a 3-dimensional thing, just like a
> force. What for do you need 4 components?

Simplifying, 3 values defining axis of rotation, 1 defining module of
torque.. As i said, i'm not really sure we really need the 4; you most
probably are right.

--
Saludos,
    STenyaK

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