func constant(e *evdev.Effect) {
e.Type = evdev.FFConstant
e.Direction = 0x6000 // 135 degrees
var c evdev.ConstantEffect
c.Level = 0x2000 // Strength : 25 %
c.Envelope.AttackLength = 0x100
c.Envelope.AttackLevel = 0
c.Envelope.FadeLength = 0x100
c.Envelope.FadeLevel = 0
e.SetData(c)
}
func spring(e *evdev.Effect) {
e.Type = evdev.FFSpring
e.Direction = 0x6000 // 135 degrees
var c [2]evdev.ConditionEffect
c[0].RightSaturation = 0x7fff
c[0].LeftSaturation = 0x7fff
c[0].RightCoeff = 0x2000
c[0].LeftCoeff = 0x2000
c[0].Deadband = 0x0
c[0].Center = 0x0
c[1] = c[0]
e.SetData(c)
}
func periodic(e *evdev.Effect) {
e.Type = evdev.FFPeriodic
e.Direction = evdev.DirLeft // Along X axis
var p evdev.PeriodicEffect
p.Waveform = evdev.FFSine
p.Period = 26 // 0.1*0x100 = 0.1 second
p.Magnitude = 0x4000 // 0.5 * Maximum magnitude
p.Offset = 0
p.Phase = 0
p.Envelope.AttackLength = 0x100
p.Envelope.AttackLevel = 0
p.Envelope.FadeLength = 0x100
p.Envelope.FadeLevel = 0
e.SetData(p)
}