public List<Particle> getNeighbours(Particle particle){
		List<Particle> neighList = new ArrayList<Particle>();
		List<Cell> neighbourCells = particle.getCell().getNeighbours();
		for(Cell cell : neighbourCells){
		//	if(cell.getParticles().size() > 0){
				neighList.addAll(cell.getParticles());
		//	}
			
		}
		return neighList;
	}