Allow changing radius in which beeps can be heard in config (up to 32), closes #1180.

src/main/resources/application.conf

@@ -97,6 +97,9 @@ opencomputers {
     # range of [0, 127], where 0 means mute (the sound will not even be
     # generated), and 127 means maximum amplitude / volume.
     beepVolume: 32
+
+    # The radius in which computer beeps can be heard.
+    beepRadius: 16
   }
 
   # Computer related settings, concerns server performance and security.

src/main/scala/li/cil/oc/Settings.scala

@@ -37,6 +37,7 @@ class Settings(val config: Config) {
   val fontRenderer = config.getString("client.fontRenderer")
   val beepSampleRate = config.getInt("client.beepSampleRate")
   val beepAmplitude = config.getInt("client.beepVolume") max 0 min Byte.MaxValue
+  val beepRadius = config.getDouble("client.beepRadius").toFloat max 1 min 32
 
   // ----------------------------------------------------------------------- //
   // computer

src/main/scala/li/cil/oc/server/PacketSender.scala

@@ -593,7 +593,7 @@ object PacketSender {
     pb.writeShort(frequency.toShort)
     pb.writeShort(duration.toShort)
 
-    pb.sendToNearbyPlayers(world, x, y, z, Option(16))
+    pb.sendToNearbyPlayers(world, x, y, z, Option(32))
   }
 
   def sendSound(world: World, x: Double, y: Double, z: Double, pattern: String) {
@@ -606,7 +606,7 @@ object PacketSender {
     pb.writeInt(blockPos.z)
     pb.writeUTF(pattern)
 
-    pb.sendToNearbyPlayers(world, x, y, z, Option(16))
+    pb.sendToNearbyPlayers(world, x, y, z, Option(32))
   }
 
   def sendWaypointLabel(t: Waypoint): Unit = {

src/main/scala/li/cil/oc/util/Audio.scala

@@ -30,6 +30,8 @@ object Audio {
 
   private def amplitude = Settings.get.beepAmplitude
 
+  private def maxDistance = Settings.get.beepRadius
+
   private val sources = mutable.Set.empty[Source]
 
   private def volume = Minecraft.getMinecraft.gameSettings.getSoundLevel(SoundCategory.BLOCKS)
@@ -42,7 +44,7 @@ object Audio {
 
   def play(x: Float, y: Float, z: Float, pattern: String, frequencyInHz: Int = 1000, durationInMilliseconds: Int = 200): Unit = {
     val mc = Minecraft.getMinecraft
-    val distanceBasedGain = math.max(0, 1 - mc.thePlayer.getDistance(x, y, z) / 12).toFloat
+    val distanceBasedGain = math.max(0, 1 - mc.thePlayer.getDistance(x, y, z) / maxDistance).toFloat
     val gain = distanceBasedGain * volume
     if (gain <= 0 || amplitude <= 0) return
 
@@ -142,6 +144,8 @@ object Audio {
           checkALError()
 
           AL10.alSource3f(source, AL10.AL_POSITION, x, y, z)
+          AL10.alSourcef(source, AL10.AL_REFERENCE_DISTANCE, maxDistance)
+          AL10.alSourcef(source, AL10.AL_MAX_DISTANCE, maxDistance)
           AL10.alSourcef(source, AL10.AL_GAIN, gain * 0.3f)
           checkALError()