mirror of https://github.com/CGAL/cgal
145 lines
3.8 KiB
C++
145 lines
3.8 KiB
C++
// Copyright (c) 2006-2007 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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// Author(s) : Laurent RINEAU
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#ifndef CGAL_IMPLICIT_SURFACE_3_H
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#define CGAL_IMPLICIT_SURFACE_3_H
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#include <CGAL/make_surface_mesh.h>
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#include <CGAL/Surface_mesher/Implicit_surface_oracle_3.h>
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#include <functional>
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namespace CGAL {
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template<
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typename GT,
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typename Function_
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>
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class Implicit_surface_3
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{
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public:
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typedef GT Geom_traits;
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typedef typename Geom_traits::Sphere_3 Sphere_3;
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typedef typename Geom_traits::FT FT;
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typedef typename Geom_traits::Point_3 Point;
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typedef Function_ Function;
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typedef Implicit_surface_3<Geom_traits, Function> Self;
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Function& function() { return func; }
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typedef Surface_mesher::Implicit_surface_oracle_3<
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Geom_traits,
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Self> Surface_mesher_traits_3;
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Implicit_surface_3(Function f,
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const Sphere_3 bounding_sphere,
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const FT error_bound = FT(1e-3),
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Geom_traits gt = Geom_traits())
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: func(f),
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sphere(bounding_sphere),
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gt(gt)
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{
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squared_error = error_bound * error_bound;
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squared_error = squared_error *
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gt.compute_squared_radius_3_object()(bounding_sphere);
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}
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FT operator()(Point p) const
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{
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return func(p);
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}
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const FT& squared_error_bound() const
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{
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return squared_error;
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}
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const Sphere_3& bounding_sphere() const
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{
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return sphere;
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}
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const Sphere_3& bounding_sphere_squared_radius() const
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{
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return gt.compute_squared_radius_3_object()(sphere);
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}
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template <typename Vertex_handle>
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bool vertices_not_on_same_surface_patch(const Vertex_handle& v1,
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const Vertex_handle& v2,
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const Vertex_handle& v3) const
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{
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return
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v1->point().element_index() != v2->point().element_index() ||
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v1->point().element_index() != v3->point().element_index();
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}
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const Function& function() const
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{
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return func;
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}
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private:
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Function func;
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Sphere_3 sphere;
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FT squared_error;
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Geom_traits gt;
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}; // end Implicit_surface_3
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template <typename GT, typename Function>
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Implicit_surface_3<GT, Function>
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make_implicit_surface_3(GT, Function f,
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typename GT::Sphere_3 sphere,
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typename GT::FT error_bound)
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{
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typedef Implicit_surface_3<GT, Function> surface;
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return surface(f, sphere, error_bound);
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}
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// template <typename GT, typename Function>
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// struct Surface_mesh_traits_generator_3<Implicit_surface_3<GT, Function> >
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// {
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// typedef Implicit_surface_3<GT, Function> Surface_type;
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// typedef typename Surface_mesher::Implicit_surface_oracle_3<GT,
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// Surface_type> Type;
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// typedef Type type; // Boost meta-programming compatibility
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// };
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// non documented class
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template <typename FT, typename Point>
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class Implicit_function_wrapper : public std::unary_function<Point, FT>
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{
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typedef FT (*Implicit_function)(FT, FT, FT);
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Implicit_function function;
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public:
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Implicit_function_wrapper(Implicit_function f) : function(f) {}
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FT operator()(Point p) const
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{
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return function(p.x(), p.y(), p.z());
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}
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};
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} // end namespace CGAL
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#endif // CGAL_IMPLICIT_SURFACE_3_H
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