On Wed, Feb 19, 2014 at 7:54 PM, Elias Vanderstuyft <elias.vds@xxxxxxxxx> wrote: > Today, I noticed something strange: an explicit saturation of zero in > DInput (or at least using the most recent driver for my Logitech MOMO > wheel), appears to be transformed to max saturation! (This is why I > chose to quote your "sat_right = 0x0000" part, however that's not the > point I want to make in this mail) > > E.g: > pos_sat = 10000 -> Max saturation send to device > pos_sat = 5000 -> Half saturation send to device > ... > pos_sat = 1 -> Zero saturation send to device (because > it appears to be rounded to zero) > pos_sat = 0 -> Max saturation send to device (?!) > > Also interesting is that the FEdit tool (from MS DirectX SDK) sets all > 'saturation' values to zero by default. This is not the case for the > 'coefficient' values: they are set to maximum. The resulting default > conditional force generates a maxed out conditional effect on my MOMO > wheel. > The weird thing is, that MSDN does not explicitly say anything about > this: http://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.reference.dicondition%28v=vs.85%29.aspx > "dwPositiveSaturation: > Maximum force output on the positive side of the offset, in the > range from 0 through 10,000. > If the device does not support force saturation, the value of this > member is ignored. > " > > So, my question is: > - Should Wine's translation layer convert a 0 dinput saturation to > max linux saturation? > - or Should the Linux FF drivers send a max saturation command > when the linux saturation equals zero? > - or Should we forget about this? (but that will result Wine's > behaviour to be different from Windows', at least for my MOMO wheel (I > don't have another capable (non-Logitech?) wheel to test it with)) > On Thu, Feb 20, 2014 at 9:52 AM, Elias Vanderstuyft <elias.vds@xxxxxxxxx> wrote: > Another question: > There is written on /include/uapi/linux/input.h:1058 : > "@phase: 'horizontal' shift" > where 'horizontal' most likely means time dimension, not phase of the > waveform, right? > Hi Anssi, Any thoughts about my previous 2 mails' questions? (I just need be sure of these things to finish my Wine FF patchset, however, if you don't have time, no problem, it can wait for some time) Best regards, Elias -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
