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[orx-envelopes] Add trigger id and object functions

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This commit is contained in:
Edwin Jakobs
2023-04-26 10:46:17 +02:00
parent a732a0559d
commit 1f6e60faa0
8 changed files with 145 additions and 40 deletions
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21
orx-envelopes/src/commonMain/kotlin/ADSR.kt
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@@ -8,11 +8,15 @@ data class ADSR(
val decayDuration: Double,
val sustainValue: Double,
val releaseDuration: Double
) : Envelope{
) : Envelope() {
override fun value(t: Double, tOff: Double): Double {
return adsr(attackDuration, decayDuration, sustainValue, releaseDuration, t, tOff)
}
override fun position(t: Double, tOff: Double): Double {
return adsrPosition(attackDuration, decayDuration, releaseDuration, t, tOff)
}
override fun isActive(t: Double, tOff: Double): Boolean {
return !(t - tOff > releaseDuration)
}
@@ -26,12 +30,21 @@ fun adsr(
t: Double,
tOff: Double = 1E10
): Double {
val da = t / attackDuration
val dc = (t - attackDuration) / decayDuration
val vOn = mix(min(1.0, da), sustainValue, dc.coerceIn(0.0..1.0))
return mix(vOn, 0.0, ((t - tOff) / releaseDuration).coerceIn(0.0..1.0))
}
fun adsrPosition(
attackDuration: Double,
decayDuration: Double,
releaseDuration: Double,
t: Double,
tOff: Double
): Double {
val ta = (t / attackDuration).coerceIn(0.0..1.0)
val td = ((t - attackDuration) / decayDuration).coerceIn(0.0..1.0)
val tr = ((t - tOff) / releaseDuration).coerceIn(0.0..1.0)
return (ta + td + tr) / 3.0
}