Geometric transformations available with copy (duplicate) operation are:
Displacement: parallel displacement is applied to
selected objects for specified displacement vector. Parameters needed are
displacement vector components.
Rotation: objects are rotated around the specified point
for the specified angle. Parameters needed are center of rotation coordinates and
angle measured in radians.
Symmetry: objects are mirrored; symmetry line is specified by
coordinates of any point on it and the angle (in radians) between the horizontal axis
and the symmetry line. Positive value of an angle means counter-clockwise direction.
Only one copy can be obtained by symmetrical transformation. If the nCopies
parameter has another value, it will be ignored.
With displacement and rotation transformations the nCopies paarmeter
specifies the number of copies. It means that copying operation will be performed several times,
each time being applied to the previous result. Default value is nCopies = 1.
The following table clarifies the parameters meaning with various transformation types: