@Override
            public void onAction(String name, boolean isPressed, float tpf) {
                if ("setNum".equals(name) && isPressed) {
                    emit.setNumParticles(1000);
                }
            }
Particle that moves in a circle.

@author Kirill Vainer
jme3-examples/src/main/java/jme3test/effect/TestMovingParticle.java