CGAL::intersection

Object	intersection ( Type1<R> f1, Type2<R> f2)
		returns the intersection result of $$f1 and $$f2 by means of the polymorphic wrapper type Object. The returned object can be tested for the intersection result and assigned by means of the operation bool assign(T& t, Object o). Precondition: The objects are of the same dimension.

The possible value for types Type1 and Type2 and the possible return values wrapped in Object are the following:

Example

The following example demonstrates the most common use of intersection routines.

#include <CGAL/intersections_d.h>

template <class R>
void foo(Segment_d<R> seg, Line_d<R> lin)
{
  Point_d<R> ipnt; Segment_d<R> iseg;
  Object result = intersection(seg, lin);
  if ( assign(ipnt, result) ) {
    // handle the point intersection case.
  } else if ( assign(iseg, result) ) {
    // handle the segment intersection case.
  } else {
    // handle the no intersection case.
  }
}

See Also