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purpose
This applet shall visualize the shape of different unit cells and the relations between
directional vectors [uvw] and the normals of planes (hkl).
Their directions are identical for the cubic system but may differ in any other system.
If "unit length" is checked the lengths of the [uvw] and the lengths of the
plane normals (hkl) are scaled to a length of 1 Angstroem.
This applet also shows the lengths of the vectors and calculates the angle of a given pair
of vectors.
The lattice matrices, the cartesian forms of the given vectors and their lengths can be
seen in the JAVA console, which you have to activate in order to read the applets output.
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usage
cell:
The cell dimensions are specified in the text fields "a b c" [Angstroem] and
"alpha beta gamma" [degree]. A space is required between the individual values !
vectors:
In the textfields labelled "1"-"10" you may specify a number of vectors (space between values!).
If the corresponding checkbox is selected then the vectors [uvw] and (hkl) are calculated for
each of those entries.
measure angle:
In the view window the lengths of the vectors are shown with their serial number ("1." etc).
Choose two numbers in order to define a pair of vectors the angle of which shall be calculated and input
those numbers in the text field "measure angle".
view:
The checkboxes "zoom & shift", "stereo pair", "perspective" and "unit length" serve as switches between different
display modes.
After modifying cell parameters, vectors or changing "unit length" click apply in order to activate those changes.
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mouse functions
rotate: (unchecked "zoom & shift")
Around x-axis: click right mouse key and drag over display.
Around y,z-axis: click left mouse key and drag over display.
zoom/shift:(checked "zoom & shift")
zooming: click left mouse key and drag over display.
shifting: click right mouse key and drag over display.
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