Update TestReverb: code cleanup

Refactored the TestReverb example code for improved clarity. This commit restructures the demo to explicitly highlight its individual components, making it easier to understand the flow and functionality.

jme3-examples/src/main/java/jme3test/audio/TestReverb.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2025 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,50 +35,80 @@ import com.jme3.app.SimpleApplication;
 import com.jme3.audio.AudioData;
 import com.jme3.audio.AudioNode;
 import com.jme3.audio.Environment;
+import com.jme3.audio.LowPassFilter;
+import com.jme3.material.Material;
+import com.jme3.math.ColorRGBA;
 import com.jme3.math.FastMath;
 import com.jme3.math.Vector3f;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Mesh;
+import com.jme3.scene.shape.Box;
+import com.jme3.scene.shape.Sphere;
+import com.jme3.system.AppSettings;
 
 public class TestReverb extends SimpleApplication {
 
-  private AudioNode audioSource;
-  private float time = 0;
-  private float nextTime = 1;
+    public static void main(String[] args) {
+        TestReverb app = new TestReverb();
+        app.start();
+    }
+
+    private AudioNode audio;
+    private float time = 0;
+    private float nextTime = 1;
+
+    @Override
+    public void simpleInitApp() {
+        flyCam.setMoveSpeed(25f);
+        flyCam.setDragToRotate(true);
+
+        cam.setLocation(Vector3f.UNIT_XYZ.mult(50f));
+        cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y);
+
+        audioRenderer.setEnvironment(Environment.Cavern);
 
-  public static void main(String[] args) {
-    TestReverb test = new TestReverb();
-    test.start();
-  }
+        audio = new AudioNode(assetManager, "Sound/Effects/Bang.wav", AudioData.DataType.Buffer);
+        audio.setPositional(true);
+        audio.setReverbEnabled(true);
+        audio.setReverbFilter(new LowPassFilter(1, 1));
+        rootNode.attachChild(audio);
 
-  @Override
-  public void simpleInitApp() {
-    audioSource = new AudioNode(assetManager, "Sound/Effects/Bang.wav",
-            AudioData.DataType.Buffer);
+        Geometry marker = makeShape("Marker", new Sphere(16, 16, .5f), ColorRGBA.Red);
+        audio.attachChild(marker);
 
-    float[] eax = new float[]{15, 38.0f, 0.300f, -1000, -3300, 0,
-      1.49f, 0.54f, 1.00f, -2560, 0.162f, 0.00f, 0.00f, 0.00f,
-      -229, 0.088f, 0.00f, 0.00f, 0.00f, 0.125f, 1.000f, 0.250f,
-      0.000f, -5.0f, 5000.0f, 250.0f, 0.00f, 0x3f};
-    audioRenderer.setEnvironment(new Environment(eax));
-    Environment env = Environment.Cavern;
-    audioRenderer.setEnvironment(env);
-  }
+        Geometry floor = makeShape("Floor", new Box(20f, .05f, 20f), ColorRGBA.Blue);
+        rootNode.attachChild(floor);
+    }
+
+    private Geometry makeShape(String name, Mesh mesh, ColorRGBA color) {
+        Geometry geo = new Geometry(name, mesh);
+        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        mat.setColor("Color", color);
+        geo.setMaterial(mat);
+        return geo;
+    }
 
-  @Override
-  public void simpleUpdate(float tpf) {
-    time += tpf;
+    @Override
+    public void simpleUpdate(float tpf) {
+        time += tpf;
 
-    if (time > nextTime) {
-      Vector3f v = new Vector3f();
-      v.setX(FastMath.nextRandomFloat());
-      v.setY(FastMath.nextRandomFloat());
-      v.setZ(FastMath.nextRandomFloat());
-      v.multLocal(40, 2, 40);
-      v.subtractLocal(20, 1, 20);
+        if (time > nextTime) {
+            time = 0;
+            nextTime = FastMath.nextRandomFloat() * 2 + 0.5f;
+
+            Vector3f position = getRandomPosition();
+            audio.setLocalTranslation(position);
+            audio.playInstance();
+        }
+    }
 
-      audioSource.setLocalTranslation(v);
-      audioSource.playInstance();
-      time = 0;
-      nextTime = FastMath.nextRandomFloat() * 2 + 0.5f;
+    private Vector3f getRandomPosition() {
+        Vector3f vec = new Vector3f();
+        vec.setX(FastMath.nextRandomFloat());
+        vec.setY(FastMath.nextRandomFloat());
+        vec.setZ(FastMath.nextRandomFloat());
+        vec.multLocal(40, 2, 40);
+        vec.subtractLocal(20, 1, 20);
+        return vec;
     }
-  }
 }