Precondition PL must be a boundary representation. P is initialized to the union of all generalized polygons in PL . This test is partial. P translated by vector v . P translated by vector - v .
P is trivial.
The bounded region of the full polygon is the entire plane. The sign of the area is positive if the bounded region is the positive side of P . Precondition P is not the full polygon. All binary boolean operations are regularized, i.e., the result R of the standard boolean operation is replaced by the interior of the closure of R . We use regX to denote the regularization of a set X .