 CGAL 5.5.2 - 2D and 3D Linear Geometry Kernel
CGAL::do_intersect() (3D Spherical Kernel)
 bool CGAL::do_intersect (Type1< SphericalKernel > obj1, Type2< SphericalKernel > obj2) checks whether obj1 and obj2 intersect. More... bool CGAL::do_intersect (Type1< SphericalKernel > obj1, Type2< SphericalKernel > obj2, Type3< SphericalKernel > obj3) checks whether obj1, obj2 and obj3 intersect. More...

## ◆ do_intersect() [1/2]

 bool CGAL::do_intersect ( Type1< SphericalKernel > obj1, Type2< SphericalKernel > obj2 )

#include <CGAL/Spherical_kernel_intersections.h>

checks whether obj1 and obj2 intersect.

See Chapter Chapter_3D_Spherical_Geometry_Kernel for details on a spherical kernel instantiation.

When using a spherical kernel, in addition to the function overloads documented here, the following function overloads are also available.

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 while for a polygon we consider the enclosed domain, for an object of type Circle_3 or Sphere_3 only the curve or the surface is considered.

Type1 and Type2 can be any of the following:

• Line_3<SphericalKernel>
• Circle_3<SphericalKernel>
• Plane_3<SphericalKernel>
• Sphere_3<SphericalKernel>
• Line_arc_3<SphericalKernel>
• Circular_arc_3<SphericalKernel>

An example illustrating this is presented in Chapter Chapter_3D_Spherical_Geometry_Kernel.

## ◆ do_intersect() [2/2]

 bool CGAL::do_intersect ( Type1< SphericalKernel > obj1, Type2< SphericalKernel > obj2, Type3< SphericalKernel > obj3 )

#include <CGAL/Spherical_kernel_intersections.h>

checks whether obj1, obj2 and obj3 intersect.

Type1, Type2 and Type3 can be:

• Sphere_3<SphericalKernel>
• Plane_3<SphericalKernel>