CGAL::intersection
#include <CGAL/intersections_d.h>
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Object
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intersection ( Type1<R> f1, Type2<R> f2)
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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 object_cast
function. | Precondition: | The objects are of the same dimension. |
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The possible value for types Type1 and Type2 and
the possible return values wrapped in Object are the following:
| Type1 |
Type2 |
Return Type |
| Line_d |
Line_d |
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| Segment_d |
Line_d |
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| Segment_d |
Segment_d |
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| Ray_d |
Line_d |
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| Ray_d |
Segment_d |
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| Ray_d |
Ray_d |
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| Hyperplane_d |
Line_d |
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| Hyperplane_d |
Ray_d |
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| Hyperplane_d |
Segment_d |
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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)
{
Object result = intersection(seg, lin);
if (const Point_d<R> *ipnt = object_cast<Point_d<R> >(&result) ) {
// handle the point intersection case with *ipnt.
} else if (const Segment_d<R> *iseg = object_cast<Segment_d<R> >(&result) ) {
// handle the segment intersection case with *iseg.
} else {
// handle the no intersection case.
}
}
See Also
do_intersect, Kernel::Intersect_d
