curioustorvald/Terrarum
1
0
Fork 0
mirror of https://github.com/curioustorvald/Terrarum.git synced 2026-06-14 12:34:05 +09:00
Code Issues Packages Projects Releases Wiki Activity

doppler effect

Browse Source
This commit is contained in:
minjaesong
2024-01-21 03:23:25 +09:00
parent f34a6b7c9f
commit 3da37408a2
4 changed files with 34 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/net/torvald/terrarum/audio/MixerTrackProcessor.kt
View File

@@ -2,16 +2,16 @@ package net.torvald.terrarum.audio
import com.badlogic.gdx.utils.Queue
import net.torvald.reflection.forceInvoke
import net.torvald.terrarum.App
import net.torvald.terrarum.*
import net.torvald.terrarum.audio.AudioMixer.Companion.SPEED_OF_SOUND_AIR
import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE
import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATED
import net.torvald.terrarum.audio.dsp.BinoPan
import net.torvald.terrarum.audio.dsp.Lowpass
import net.torvald.terrarum.audio.dsp.NullFilter
import net.torvald.terrarum.distBetweenActors
import net.torvald.terrarum.gameactors.ActorWithBody
import net.torvald.terrarum.relativeXposition
import net.torvald.terrarum.sqr
import net.torvald.terrarum.gameactors.ActorWithBody.Companion.GAME_TO_SI_VELO
import org.dyn4j.geometry.Vector2
import kotlin.math.*
/**
@@ -136,7 +136,19 @@ class MixerTrackProcessor(bufferSize: Int, val rate: Int, val track: TerrarumAud
(SAMPLING_RATED*0.5) / (24.0 * (distFromActor / distFalloff).sqr() + 1.0)
)
// printdbg("dist=$distFromActor\tvol=${fullscaleToDecibels(vol)}\tcutoff=${(track.filters[1] as Lowpass).cutoff}")
val sourceVec = (track.trackingTarget as ActorWithBody).let { it.externalV + (it.controllerV ?: Vector2()) }
val listenerVec = App.audioMixer.actorNowPlaying!!.let { it.externalV + (it.controllerV ?: Vector2()) }
val distFromActorNext = distBetweenPoints(
App.audioMixer.actorNowPlaying!!.centrePosVector + listenerVec,
(track.trackingTarget as ActorWithBody).centrePosVector + sourceVec
)
val isApproaching = if (distFromActorNext <= distFromActor) 1.0 else -1.0
val relativeSpeed = (sourceVec - listenerVec).magnitude * GAME_TO_SI_VELO * isApproaching
val dopplerFactor = (SPEED_OF_SOUND_AIR + relativeSpeed) / SPEED_OF_SOUND_AIR // >1: speedup, <1: speeddown
track.processor.streamBuf?.playbackSpeed = dopplerFactor.toFloat()
// printdbg("dist=$distFromActor\tvol=${fullscaleToDecibels(vol)}\tcutoff=${(track.filters[1] as Lowpass).cutoff}\tdopplerFactor=$dopplerFactor")
}
}
else {