private void checkUnitCellOffset() { if (symmetry == null || fileOffsetFractional == null) return; fileOffset.set(fileOffsetFractional); if (unitCellOffsetFractional != fileCoordinatesAreFractional) { if (unitCellOffsetFractional) symmetry.toCartesian(fileOffset, false); else symmetry.toFractional(fileOffset, false); } }