On 3/14/07, STenyaK (Bruno González) <[EMAIL PROTECTED]> wrote:
On 3/14/07, Dmitry Torokhov <[EMAIL PROTECTED]> wrote: > > 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.
I would think one plane and one axis is all that's needed for a 3d vector, or? Do we understand eachother?
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? -- Johann - 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/
