This data item defines a polynomial in space if 2D or 3D.
Other data items can check if nodes are located on this geometry.
In 2D it is the curve
.
In 3D it is the surface
.
In 2D defines the domain of .
In 3D defines the domain of and defines the domain
of . All **node** with a distance (that is the -distance in 2D or
the -distance in 3D) not more than *tolerance* are considered to be
part of the polynomial.

tochnog 2001-09-02