net
Set the projection net used to represent a crystallographic direction.
In the
wulff projection, the point to project (above)
and the point of the sphere farther from the user (below) define a segment
that intersects the circle at a point, giving the final representation.
In the
schmidt projection, the point to project (above) is
rotated around the point of the sphere closer to the user (above),
keeping the same XY direction, until both points have the same Z
coordinate, and then divided by square root of 2, to be inside the
circle with radius R at coordinate Z, giving the final representation.
Example: <direction ... net="wulff"/> (default)
Allowed values: wulff, schmidt (optional)