offset{
shift the given geometry by a vector
include{File} ...
offset{shift_x, shift_y, shift_z,
OPTIONAL:ShiftDistance } ...
The geometry is shifted by the given vector (
shift_x,
shift_y,
shift_z).
If the optional parameter
ShiftDistance is given AND non-zero, then the vector (shift_x, shift_y, shift_z) only
represents the shifting direction, into which the object is shifted by the given distance ShiftDistance.