code: protected  void emitWithBurstCheck(float[] particlePositions, float[] particleVelocities,
                           float[] particleTimeStamps)
      {
          if ( burstMode )
          {
              if ( executeOnce )
              {
                  emit(particlePositions, particleVelocities, particleTimeStamps);
                  executeOnce = false;
              }
          }
          else
          {
              emit(particlePositions, particleVelocities, particleTimeStamps);
          }
  
      }
docs: If the burst mode is on, emit the particles only once.
  
  @param particlePositions
  @param particleVelocities
  @param particleTimeStamps