struct_ff_effect9
Defines force feedback effect
Usage
__u16 type;
__s16 id;
__u16 direction;
struct ff_trigger
trigger;
struct ff_replay
replay;
union u;
Members
type
type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING, FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
id
an unique id assigned to an effect
direction
direction of the effect
trigger
trigger conditions (struct ff_trigger)
replay
scheduling of the effect (struct ff_replay)
u
effect-specific structure (one of ff_constant_effect, ff_ramp_effect, ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further defining effect parameters
Overview
This structure is sent through ioctl from the application to the driver. To create a new effect application should set its id to -1; the kernel will return assigned id which can later be used to update or delete this effect.
Direction of the effect is encoded as follows
0 deg -> 0x0000 (down) 90 deg -> 0x4000 (left) 180 deg -> 0x8000 (up) 270 deg -> 0xC000 (right)
Releases
4 releases since Debian 4.0 (Etch); the text changed 3 times.