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## CGAL::do_intersect

#include <CGAL/intersections.h>

bool | do_intersect ( Type1<Kernel> obj1, Type2<Kernel> obj2)
|  | checks whether obj1 and obj2 intersect. Two objects obj1 and obj2 intersect if there is a point p that is part of both obj1 and obj2. The intersection region of those two objects is defined as the set of all points p that are part of both obj1 and obj2. Note that for objects like triangles and polygons that enclose a bounded region, this region is part of the object.

The types Type1 and Type2 can be any of the following:

- Point_2<Kernel>
- Line_2<Kernel>
- Ray_2<Kernel>
- Segment_2<Kernel>
- Triangle_2<Kernel>
- Iso_rectangle_2<Kernel>

Also, in three-dimensional space Type1 can be Plane_3<Kernel> or Triangle_3<Kernel> and Type2 any of

- Plane_3<Kernel>
- Line_3<Kernel>
- Ray_3<Kernel>
- Segment_3<Kernel>
- Triangle_3<Kernel>

### See Also

CGAL::intersection

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The CGAL Project . Tue, December 21, 2004 .