@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Triangle other = (Triangle) obj;
		if (i != other.i)
			return false;
		if (j != other.j)
			return false;
		if (k != other.k)
			return false;
		if (normalVector == null) {
			if (other.normalVector != null)
				return false;
		} else if (!normalVector.equals(other.normalVector))
			return false;
		return true;
	}