How to use

setSelectRandomImage

method

in

com.jme3.effect.ParticleEmitter

private void createFlame(){
  flame = new ParticleEmitter("Flame", EMITTER_TYPE, 32 * COUNT_FACTOR);
  flame.setSelectRandomImage(true);
  flame.setStartColor(new ColorRGBA(1f, 0.4f, 0.05f, (float) (1f / COUNT_FACTOR_F)));
  flame.setEndColor(new ColorRGBA(.4f, .22f, .12f, 0f));
  flame.setStartSize(1.3f);
  flame.setEndSize(2f);
  flame.setShape(new EmitterSphereShape(Vector3f.ZERO, 1f));
  flame.setParticlesPerSec(0);
  flame.setGravity(0, -5, 0);
  flame.setLowLife(.4f);
  flame.setHighLife(.5f);
  flame.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 7, 0));
  flame.getParticleInfluencer().setVelocityVariation(1f);
  flame.setImagesX(2);
  flame.setImagesY(2);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
  mat.setBoolean("PointSprite", POINT_SPRITE);
  flame.setMaterial(mat);
  explosionEffect.attachChild(flame);
}

private void prepareEffect(AssetManager assetManager) {
  int COUNT_FACTOR = 1;
  float COUNT_FACTOR_F = 1f;
  effect = new ParticleEmitter("Flame", Type.Triangle, 32 * COUNT_FACTOR);
  effect.setSelectRandomImage(true);
  effect.setStartColor(new ColorRGBA(1f, 0.4f, 0.05f, (float) (1f / COUNT_FACTOR_F)));
  effect.setEndColor(new ColorRGBA(.4f, .22f, .12f, 0f));
  effect.setStartSize(1.3f);
  effect.setEndSize(2f);
  effect.setShape(new EmitterSphereShape(Vector3f.ZERO, 1f));
  effect.setParticlesPerSec(0);
  effect.setGravity(0, -5f, 0);
  effect.setLowLife(.4f);
  effect.setHighLife(.5f);
  effect.getParticleInfluencer()
      .setInitialVelocity(new Vector3f(0, 7, 0));
  effect.getParticleInfluencer().setVelocityVariation(1f);
  effect.setImagesX(2);
  effect.setImagesY(2);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
  effect.setMaterial(mat);
}

  private void createDebris(){
    debris = new ParticleEmitter("Debris", Type.Triangle, 15 * COUNT_FACTOR);
    debris.setSelectRandomImage(true);
    debris.setRandomAngle(true);
    debris.setRotateSpeed(FastMath.TWO_PI * 4);
    debris.setStartColor(new ColorRGBA(1f, 0.59f, 0.28f, (float) (1.0f / COUNT_FACTOR_F)));
    debris.setEndColor(new ColorRGBA(.5f, 0.5f, 0.5f, 0f));
    debris.setStartSize(.2f);
    debris.setEndSize(.2f);

//        debris.setShape(new EmitterSphereShape(Vector3f.ZERO, .05f));
    debris.setParticlesPerSec(0);
    debris.setGravity(0, 12f, 0);
    debris.setLowLife(1.4f);
    debris.setHighLife(1.5f);
    debris.getParticleInfluencer()
        .setInitialVelocity(new Vector3f(0, 15, 0));
    debris.getParticleInfluencer().setVelocityVariation(.60f);
    debris.setImagesX(3);
    debris.setImagesY(3);
    Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
    mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/Debris.png"));
    debris.setMaterial(mat);
    explosionEffect.attachChild(debris);
  }

private void createFlash(){
  flash = new ParticleEmitter("Flash", EMITTER_TYPE, 24 * COUNT_FACTOR);
  flash.setSelectRandomImage(true);
  flash.setStartColor(new ColorRGBA(1f, 0.8f, 0.36f, (float) (1f / COUNT_FACTOR_F)));
  flash.setEndColor(new ColorRGBA(1f, 0.8f, 0.36f, 0f));
  flash.setStartSize(.1f);
  flash.setEndSize(3.0f);
  flash.setShape(new EmitterSphereShape(Vector3f.ZERO, .05f));
  flash.setParticlesPerSec(0);
  flash.setGravity(0, 0, 0);
  flash.setLowLife(.2f);
  flash.setHighLife(.2f);
  flash.getParticleInfluencer()
      .setInitialVelocity(new Vector3f(0, 5f, 0));
  flash.getParticleInfluencer().setVelocityVariation(1);
  flash.setImagesX(2);
  flash.setImagesY(2);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flash.png"));
  mat.setBoolean("PointSprite", POINT_SPRITE);
  flash.setMaterial(mat);
  explosionEffect.attachChild(flash);
}

  private void prepareEffect() {
    int COUNT_FACTOR = 1;
    float COUNT_FACTOR_F = 1f;
    effect = new ParticleEmitter("Flame", Type.Triangle, 32 * COUNT_FACTOR);
    effect.setSelectRandomImage(true);
    effect.setStartColor(new ColorRGBA(1f, 0.4f, 0.05f, (float) (1f / COUNT_FACTOR_F)));
    effect.setEndColor(new ColorRGBA(.4f, .22f, .12f, 0f));
    effect.setStartSize(1.3f);
    effect.setEndSize(2f);
    effect.setShape(new EmitterSphereShape(Vector3f.ZERO, 1f));
    effect.setParticlesPerSec(0);
    effect.setGravity(0, -5, 0);
    effect.setLowLife(.4f);
    effect.setHighLife(.5f);
    effect.getParticleInfluencer()
        .setInitialVelocity(new Vector3f(0, 7, 0));
    effect.getParticleInfluencer().setVelocityVariation(1f);
    effect.setImagesX(2);
    effect.setImagesY(2);
    Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
    mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
    effect.setMaterial(mat);
//        effect.setLocalScale(100);
    rootNode.attachChild(effect);
  }
 

emit.setStartColor(ColorRGBA.White);
emit.setEndColor(ColorRGBA.White);
emit.setSelectRandomImage(true);
emit.emitAllParticles();

debris.setImagesX(3); 
debris.setImagesY(3); // 3x3 texture animation
debris.setSelectRandomImage(true);
debris.setRotateSpeed(4);
debris.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 4, 0));

emitter.setImagesX(Math.max(1, resource.getData("frames")));
emitter.setImagesY(1);
emitter.setSelectRandomImage(resource.getFlags().contains(ArtResource.ArtResourceFlag.RANDOM_START_FRAME));
emitter.setInWorldSpace(false);

private void prepareEffect(AssetManager assetManager) {
  int COUNT_FACTOR = 1;
  float COUNT_FACTOR_F = 1f;
  effect = new ParticleEmitter("Flame", Type.Triangle, 32 * COUNT_FACTOR);
  effect.setSelectRandomImage(true);
  effect.setStartColor(new ColorRGBA(1f, 0.4f, 0.05f, (float) (1f / COUNT_FACTOR_F)));
  effect.setEndColor(new ColorRGBA(.4f, .22f, .12f, 0f));
  effect.setStartSize(1.3f);
  effect.setEndSize(2f);
  effect.setShape(new EmitterSphereShape(Vector3f.ZERO, 1f));
  effect.setParticlesPerSec(0);
  effect.setGravity(0, -5f, 0);
  effect.setLowLife(.4f);
  effect.setHighLife(.5f);
  effect.setInitialVelocity(new Vector3f(0, 7, 0));
  effect.setVelocityVariation(1f);
  effect.setImagesX(2);
  effect.setImagesY(2);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
  effect.setMaterial(mat);
}