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Dispatched before_handle_event_imp()

This commit is contained in:
Efi Fogel 2017-12-31 18:55:23 +02:00
parent 557e948667
commit fd834d771a
1 changed files with 52 additions and 5 deletions
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57
Arrangement_on_surface_2/include/CGAL/Arr_topology_traits/Arr_spherical_insertion_helper.h
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@ -30,6 +30,7 @@
* Definition of the Arr_spherical_insertion_helper class-template. * Definition of the Arr_spherical_insertion_helper class-template.
*/ */
#include <CGAL/Arr_tags.h>
#include <CGAL/Arr_topology_traits/Arr_spherical_construction_helper.h> #include <CGAL/Arr_topology_traits/Arr_spherical_construction_helper.h>
namespace CGAL { namespace CGAL {
@ -59,6 +60,17 @@ private:
typedef Arr_spherical_construction_helper<Gt2, Arrangement_2, Event, Subcurve> typedef Arr_spherical_construction_helper<Gt2, Arrangement_2, Event, Subcurve>
Base; Base;
typedef typename Gt2::Left_side_category Left_side_category;
typedef typename Gt2::Bottom_side_category Bottom_side_category;
typedef typename Gt2::Top_side_category Top_side_category;
typedef typename Gt2::Right_side_category Right_side_category;
typedef typename Arr_all_sides_oblivious_category<Left_side_category,
Bottom_side_category,
Top_side_category,
Right_side_category>::result
All_sides_oblivious_category;
public: public:
typedef typename Gt2::X_monotone_curve_2 X_monotone_curve_2; typedef typename Gt2::X_monotone_curve_2 X_monotone_curve_2;
typedef typename Gt2::Point_2 Point_2; typedef typename Gt2::Point_2 Point_2;
@ -91,7 +103,7 @@ public:
this->m_spherical_face = Face_handle(this->m_top_traits->south_face()); this->m_spherical_face = Face_handle(this->m_top_traits->south_face());
} }
/*! A notification invoked before the sweep-line starts handling a given /*! A notification invoked before the surface-sweep starts handling a given
* event. * event.
*/ */
virtual void before_handle_event(Event* event); virtual void before_handle_event(Event* event);
@ -101,6 +113,21 @@ public:
/*! Get the current top face. */ /*! Get the current top face. */
virtual Face_handle top_face() const; virtual Face_handle top_face() const;
private:
/* A notification invoked before the surface-sweep starts handling a given
* event.
* This is the implementation for the case where all 4 boundary sides are
* oblivious.
*/
void before_handle_event_imp(Event* event, Arr_all_sides_oblivious_tag);
/* A notification invoked before the surface-sweep starts handling a given
* event.
* This is the implementation for the case where all 4 boundary sides are
* not oblivious.
*/
void before_handle_event_imp(Event* event, Arr_not_all_sides_oblivious_tag);
}; };
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
@ -114,6 +141,26 @@ public:
template <typename Tr, typename Arr, typename Evnt, typename Sbcv> template <typename Tr, typename Arr, typename Evnt, typename Sbcv>
void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>:: void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>::
before_handle_event(Event* event) before_handle_event(Event* event)
{ before_handle_event_imp(event, All_sides_oblivious_category()); }
/* A notification invoked before the surface-sweep starts handling a given
* event.
* This is the implementation for the case where all 4 boundary sides are
* oblivious.
*/
template <typename Tr, typename Arr, typename Evnt, typename Sbcv>
void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>::
before_handle_event_imp(Event* event, Arr_all_sides_oblivious_tag)
{ return; }
/* A notification invoked before the surface-sweep starts handling a given
* event.
* This is the implementation for the case where all 4 boundary sides are
* not oblivious.
*/
template <typename Tr, typename Arr, typename Evnt, typename Sbcv>
void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>::
before_handle_event_imp(Event* event, Arr_not_all_sides_oblivious_tag)
{ {
// Ignore events that do not have boundary conditions. // Ignore events that do not have boundary conditions.
const Arr_parameter_space ps_x = event->parameter_space_in_x(); const Arr_parameter_space ps_x = event->parameter_space_in_x();
@ -167,11 +214,10 @@ before_handle_event(Event* event)
// Process left discontinuity boundary: // Process left discontinuity boundary:
// The event has only right curves, as there is exactly one curve // The event has only right curves, as there is exactly one curve
// incident to an event with boundary conditions. // incident to an event with boundary conditions.
CGAL_assertion((event->number_of_left_curves() == 0) && // CGAL_assertion((event->number_of_left_curves() == 0) &&
(event->number_of_right_curves() >= 1)); // (event->number_of_right_curves() >= 1));
const X_monotone_curve_2& xc = const X_monotone_curve_2& xc =
(*(event->right_curves_begin()))->last_curve(); (*(event->right_curves_begin()))->last_curve();
if (xc.halfedge_handle() != Halfedge_handle()) { if (xc.halfedge_handle() != Halfedge_handle()) {
// Update the current top face. // Update the current top face.
this->m_spherical_face = xc.halfedge_handle()->twin()->face(); this->m_spherical_face = xc.halfedge_handle()->twin()->face();
@ -205,7 +251,8 @@ before_handle_event(Event* event)
} }
} }
/*! A notification invoked when a new subcurve is created. */ /*! A notification invoked when a new subcurve is created.
*/
template <typename Tr, typename Arr, typename Evnt, typename Sbcv> template <typename Tr, typename Arr, typename Evnt, typename Sbcv>
void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>:: void Arr_spherical_insertion_helper<Tr, Arr, Evnt, Sbcv>::
add_subcurve(Halfedge_handle he, Subcurve* /* sc */) add_subcurve(Halfedge_handle he, Subcurve* /* sc */)