void calcUnitCellMinMax(Point3f pointMin, Point3f pointMax) {
		if (cellInfos == null)
			return;
		for (int i = 0; i < modelCount; i++) {
			if (!cellInfos[i].coordinatesAreFractional)
				continue;
			Point3f[] vertices = cellInfos[i].unitCell.getVertices();
			for (int j = 0; j < 8; j++)
				checkMinMax(vertices[j], pointMin, pointMax);
		}
	}