particle effect does not appear in libgdx?

Question

EDIT
OK I found this video that explains how to use it : http://www.youtube.com/watch?v=LCLa-rgR_MA

it works with this code:

//in create
effect = new ParticleEffect();
FileHandle fileDir = Gdx.files.internal("data");
effect.load(Gdx.files.internal("data/myParticleTxtFile"), fileDir);
effect.start();

//in render
effect.draw(batch, Gdx.graphics.getDeltaTime());
batch.end();

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Previous message: I created a particle effect with the particle editor, I added the text file to the data folder. The particle constructor needs an atlas, so I created a new atlas with TexturePacker but I could not make it work.

Answer 1

OK I found this video that explains how to use it : http://www.youtube.com/watch?v=LCLa-rgR_MA

it works with this code:

//in create
effect = new ParticleEffect();
FileHandle fileDir = Gdx.files.internal("data");
effect.load(Gdx.files.internal("data/myParticleTxtFile"), fileDir);
effect.start();

//in render
effect.draw(batch, Gdx.graphics.getDeltaTime());
batch.end();