  Automatic crystal orientation determination and orientation mapping are
important tools for research on polycrystalline materials. The most common
methods of automatic orientation determination rely on detecting and indexing
individual diffraction reflections. These methods, however, have not been used
for orientation mapping of quasicrystalline materials. The paper describes
necessary changes to existing software designed for orientation determination
of periodic crystals so that it can be applied to quasicrystals. The changes
are implemented in one of such programs. The functioning of the modified
program is illustrated by an example orientation map of an icosahedral
polycrystal.
