CGAL 6.2 - 3D Spherical Geometry Kernel

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List of all members | Classes
SphericalKernel Concept Reference
Reference Manual » Geometric Concepts

## Definition

Refines
  `Kernel`

Has models
  `CGAL::Spherical_kernel_3<Kernel,AlgebraicKernelForSpheres>`
  `CGAL::Exact_spherical_kernel_3`

See also
  `Kernel`

## Concepts
concept | BoundedSide_3
concept | CircularArc_3
| Concept for arcs of circles. More...
concept | CircularArcPoint_3
| Concept for points on spheres, circles, circular arcs or line arcs. More...
concept | CompareTheta_3
concept | CompareThetaZ_3
concept | CompareX_3
concept | CompareXY_3
concept | CompareXYZ_3
concept | CompareY_3
concept | CompareZ_3
concept | CompareZAtTheta_3
concept | CompareZToRight_3
concept | ComputeApproximateAngle_3
concept | ComputeApproximateSquaredLength_3
concept | ComputeCircularX_3
concept | ComputeCircularY_3
concept | ComputeCircularZ_3
concept | ConstructBbox_3
concept | ConstructCircle_3
concept | ConstructCircularArc_3
| The circular arc constructed from a circle, a source, and a target, is defined as the set of points of the circle that lie between the source `p1` and the target `p2`, when traversing the circle counterclockwise seen from the side of the plane of the circle pointed by its positive normal vectors. More...
concept | ConstructCircularArcPoint_3
concept | ConstructCircularMaxVertex_3
concept | ConstructCircularMinVertex_3
concept | ConstructCircularSourceVertex_3
concept | ConstructCircularTargetVertex_3
concept | ConstructLine_3
concept | ConstructLineArc_3
concept | ConstructPlane_3
concept | ConstructSphere_3
concept | DoIntersect_3
| Testing whether two curves or surfaces intersect. More...
concept | DoOverlap_3
concept | Equal_3
| Testing equality between objects. More...
concept | GetEquation
concept | HasOn_3
concept | HasOnBoundedSide_3
concept | HasOnUnboundedSide_3
concept | Intersect_3
concept | IsThetaMonotone_3
concept | LineArc_3
| Concept for line segments supported by a line that is a model of `Kernel::Line_3`, and whose endpoints are models of the `SphericalKernel::CircularArcPoint_3` concept. More...
concept | MakeThetaMonotone_3
concept | Split_3

## Types
A model of `SphericalKernel` must provide some basic types
typedef unspecified_type | Linear_kernel
| Model of `Kernel`.
typedef unspecified_type | Algebraic_kernel
| Model of `AlgebraicKernelForSpheres`.
typedef unspecified_type | Root_of_2
| Model of `RootOf_2`.
typedef unspecified_type | Root_for_spheres_2_3
| Model of `AlgebraicKernelForSpheres::RootForSpheres_2_3`.
typedef unspecified_type | Polynomial_1_3
| Model of `AlgebraicKernelForSpheres::Polynomial_1_3`.
typedef unspecified_type | Polynomials_for_line_3
| Model of `AlgebraicKernelForSpheres::PolynomialsForLines_3`.
typedef unspecified_type | Polynomial_for_spheres_2_3
| Model of `AlgebraicKernelForSpheres::PolynomialForSpheres_2_3`.
typedef unspecified_type | Polynomials_for_circle_3
| Model of `AlgebraicKernelForSpheres::PolynomialsForCircles_3`.
and to define the following geometric objects
typedef unspecified_type | Point_3
| Model of `Kernel::Point_3`.
typedef unspecified_type | Vector_3
| Model of `Kernel::Vector_3`.
typedef unspecified_type | Line_3
| Model of `Kernel::Line_3`.
typedef unspecified_type | Plane_3
| Model of `Kernel::Plane_3`.
typedef unspecified_type | Sphere_3
| Model of `Kernel::Sphere_3`.
typedef unspecified_type | Circle_3
| Model of `Kernel::Circle_3`.
typedef unspecified_type | Line_arc_3
| Model of `SphericalKernel::LineArc_3`.
typedef unspecified_type | Circular_arc_3
| Model of `SphericalKernel::CircularArc_3`.
typedef unspecified_type | Circular_arc_point_3
| Model of `SphericalKernel::CircularArcPoint_3`.

## Predicates
Moreover, a model of `SphericalKernel` must provide predicates, constructions and other functionalities.
typedef unspecified_type | Compare_x_3
| Model of `SphericalKernel::CompareX_3`.
typedef unspecified_type | Compare_y_3
| Model of `SphericalKernel::CompareY_3`.
typedef unspecified_type | Compare_z_3
| Model of `SphericalKernel::CompareZ_3`.
typedef unspecified_type | Compare_xy_3
| Model of `SphericalKernel::CompareXY_3`.
typedef unspecified_type | Compare_xyz_3
| Model of `SphericalKernel::CompareXYZ_3`.
typedef unspecified_type | Compare_theta_3
| Model of `SphericalKernel::CompareTheta_3`.
typedef unspecified_type | Compare_theta_z_3
| Model of `SphericalKernel::CompareThetaZ_3`.
typedef unspecified_type | Compare_z_at_theta_3
| Model of `SphericalKernel::CompareZAtTheta_3`.
typedef unspecified_type | Compare_z_to_right_3
| Model of `SphericalKernel::CompareZToRight_3`.
typedef unspecified_type | Equal_3
| Model of `SphericalKernel::Equal_3`.
typedef unspecified_type | Has_on_3
| Model of `SphericalKernel::HasOn_3`.
typedef unspecified_type | Do_overlap_3
| Model of `SphericalKernel::DoOverlap_3`.
typedef unspecified_type | Do_intersect_3
| Model of `SphericalKernel::DoIntersect_3`.
typedef unspecified_type | Bounded_side_3
| Model of `SphericalKernel::BoundedSide_3`.
typedef unspecified_type | Has_on_bounded_side_3
| Model of `SphericalKernel::HasOnBoundedSide_3`.
typedef unspecified_type | Has_on_unbounded_side_3
| Model of `SphericalKernel::HasOnUnboundedSide_3`.
typedef unspecified_type | Is_theta_monotone_3
| Model of `SphericalKernel::IsThetaMonotone_3`.

## Constructions
typedef unspecified_type | Construct_line_3
| Model of `SphericalKernel::ConstructLine_3`.
typedef unspecified_type | Construct_plane_3
| Model of `SphericalKernel::ConstructPlane_3`.
typedef unspecified_type | Construct_sphere_3
| Model of `SphericalKernel::ConstructSphere_3`.
typedef unspecified_type | Construct_circle_3
| Model of `SphericalKernel::ConstructCircle_3`.
typedef unspecified_type | Construct_line_arc_3
| Model of `SphericalKernel::ConstructLineArc_3`.
typedef unspecified_type | Construct_circular_arc_3
| Model of `SphericalKernel::ConstructCircularArc_3`.
typedef unspecified_type | Construct_circular_arc_point_3
| Model of `SphericalKernel::ConstructCircularArcPoint_3`.
typedef unspecified_type | Construct_circular_min_vertex_3
| Model of `SphericalKernel::ConstructCircularMinVertex_3`.
typedef unspecified_type | Construct_circular_max_vertex_3
| Model of `SphericalKernel::ConstructCircularMaxVertex_3`.
typedef unspecified_type | Construct_circular_source_vertex_3
| Model of `SphericalKernel::ConstructCircularSourceVertex_3`.
typedef unspecified_type | Construct_circular_target_vertex_3
| Model of `SphericalKernel::ConstructCircularTargetVertex_3`.
typedef unspecified_type | Construct_bbox_3
| Model of `SphericalKernel::ConstructBbox_3`.
typedef unspecified_type | Intersect_3
| Model of `SphericalKernel::Intersect_3`.
typedef unspecified_type | Split_3
| Model of `SphericalKernel::Split_3`.
typedef unspecified_type | Make_theta_monotone_3
| Model of `SphericalKernel::MakeThetaMonotone_3`.

## Computations
typedef unspecified_type | Compute_circular_x_3
| Model of `SphericalKernel::ComputeCircularX_3`.
typedef unspecified_type | Compute_circular_y_3
| Model of `SphericalKernel::ComputeCircularY_3`.
typedef unspecified_type | Compute_circular_z_3
| Model of `SphericalKernel::ComputeCircularZ_3`.
typedef unspecified_type | Compute_approximate_squared_length_3
| Model of `SphericalKernel::ComputeApproximateSquaredLength_3`.
typedef unspecified_type | Compute_approximate_angle_3
| Model of `SphericalKernel::ComputeApproximateAngle_3`.

## Link with the algebraic kernel
typedef unspecified_type | Get_equation
| Model of `SphericalKernel::GetEquation`.

## Operations
As in the `Kernel` concept, for each of the function objects above, there must exist a member function that requires no arguments and returns an instance of that function object. The name of the member function is the uncapitalized name of the type returned with the suffix `_object` appended. For example, for the function object `SphericalKernel::Construct_circular_arc_3` the following member function must exist:
Construct_circular_arc_3 | construct_circular_arc_3_object () const

## Operations on a given sphere,
A context sphere must be provided to the following functions:
Compare_theta_3 | compare_theta_3_object (const Sphere_3 &sphere) const
Compare_theta_z_3 | compare_theta_z_3_object (const Sphere_3 &sphere) const
Compare_z_at_theta_3 | compare_z_at_theta_3_object (const Sphere_3 &sphere) const
Compare_z_to_right_3 | compare_z_to_right_3_object (const Sphere_3 &sphere) const
Make_theta_monotone_3 | make_theta_monotone_3_object (const Sphere_3 &sphere) const
Is_theta_monotone_3 | is_theta_monotone_3_object (const Sphere_3 &sphere) const