added (back) sound for photon absorption, see phetsims/molecules-and-…

…light#236

js/moleculesandlight/view/MoleculesAndLightScreenView.js

@@ -50,18 +50,19 @@ define( require => {
 
   // sounds
   const breakApartSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/break-apart.mp3' );
+  const infraredPhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-ir.mp3' );
+  const infraredPhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-ir.mp3' );
+  const microwavePhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-microwave.mp3' );
   const moleculeEnergizedSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/glow-loop-higher.mp3' );
+  const microwavePhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-microwave.mp3' );
+  const photonAbsorbedSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/absorb-loop.mp3' );
   const rotationClockwiseSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/rotate-clockwise.mp3' );
   const rotationCounterclockwiseSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/rotate-counterclockwise.mp3' );
+  const ultravioletPhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-uv.mp3' );
+  const ultravioletPhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-uv.mp3' );
   const vibrationSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/vibration.mp3' );
-  const microwavePhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-microwave.mp3' );
-  const infraredPhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-ir.mp3' );
   const visiblePhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-visible.mp3' );
-  const ultravioletPhotonFromMoleculeSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-release-uv.mp3' );
-  const microwavePhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-microwave.mp3' );
-  const infraredPhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-ir.mp3' );
   const visiblePhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-visible.mp3' );
-  const ultravioletPhotonInitialEmissionSoundInfo = require( 'sound!MOLECULES_AND_LIGHT/photon-emit-uv.mp3' );
 
   // constants
   // Model-view transform for intermediate coordinates.
@@ -232,6 +233,13 @@ define( require => {
     // sound generation
     //-----------------------------------------------------------------------------------------------------------------
 
+    // photon absorbed sound
+    const photonAbsorbedSound = new SoundClip( photonAbsorbedSoundInfo, { initialOutputLevel: 0.025 } );
+    soundManager.addSoundGenerator( photonAbsorbedSound );
+    const photonAbsorbedSoundPlayer = () => {
+      photonAbsorbedSound.play();
+    };
+
     // TODO - @Ashton-Morris - please adjust level if needed, see https://github.com/phetsims/molecules-and-light/issues/233
     // sound to play when molecule becomes "energized", which is depicted as glowing in the view
     const moleculeEnergizedLoop = new SoundClip( moleculeEnergizedSoundInfo, {
@@ -312,6 +320,7 @@ define( require => {
 
     // function that adds all of the listeners involved in creating sound
     const addSoundPlayersToMolecule = molecule => {
+      molecule.photonAbsorbedEmitter.addListener( photonAbsorbedSoundPlayer );
       molecule.highElectronicEnergyStateProperty.link( updateMoleculeEnergizedSound );
       molecule.brokeApartEmitter.addListener( breakApartSoundPlayer );
       molecule.rotatingProperty.link( updateRotationSound );
@@ -324,6 +333,9 @@ define( require => {
 
     // remove listeners when the molecules go away
     photonAbsorptionModel.activeMolecules.addItemRemovedListener( function( removedMolecule ) {
+      if ( removedMolecule.photonAbsorbedEmitter.hasListener( photonAbsorbedSoundPlayer ) ) {
+        removedMolecule.photonAbsorbedEmitter.removeListener( photonAbsorbedSoundPlayer );
+      }
       if ( removedMolecule.highElectronicEnergyStateProperty.hasListener( updateMoleculeEnergizedSound ) ) {
         removedMolecule.highElectronicEnergyStateProperty.unlink( updateMoleculeEnergizedSound );
       }