Align Translation

A position in cell space is given by the coordinates of the
three cell vectors. To convert to absolute space, the cell
rotation, translation and zero node translation must be applied.
A position in reference space is given by the coordinates of the
three reference vectors. To convert to absolute space, the reference
rotation, translation and zero node translation must be applied.
### Cell

The entries **x**, **y**, **z** indicate the coordinates
of the three cell vectors for a given position. These coordinates
can be given in terms of **Conventional** or **Primitive**
vectors, using the **Vectors** menu.
### Reference

The reference can be the current layer (the default) or another
cell. To select a cell as reference, press **Cell** and click
on its visual representation (or write its identification directly
on the enabled entry).
The entries **x**, **y**, **z** indicate the coordinates of
the three reference vectors for a given position. When the reference
is a cell, these are the cell vectors. When the reference is the layer,
these vectors are the layer orthonormed axes.
The reference coordinates can be given in terms of **Conventional**
or **Primitive** vectors, using the **Vectors** menu.
When the reference is the layer, only the option **Conventional**
is available.

The alignement consists in translating the cell so the cell and the reference entered positions become the same.

Pressing **Ok** on the second level dialog, the **Align**
information is saved but the actual translation is calculated only
after pressing **Ok** on the first level dialog, to ensure
that changing later some cell parameters will not produce
wrong results.

To disable the **Align** information, open again the
second level dialog, which now shows the previously
entered data, and press **Cancel**.