void createSet(int v1, int v2, int v3) {
		int i;
		for (i = 0; i < nSets; i++)
			if (surfaceSet[i] == null)
				break;
		if (i >= 100) {
			setsSuccessful = false;
			return;
		}
		if (i == nSets)
			nSets = i + 1;
		surfaceSet[i] = new BitSet();
		surfaceSet[i].set(v1);
		surfaceSet[i].set(v2);
		surfaceSet[i].set(v3);
	}