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| // --------------------------------------------------------------------- | ||
| // | ||
| // Copyright (C) 2022 by the deal.II authors | ||
| // | ||
| // This file is part of the deal.II library. | ||
| // | ||
| // The deal.II library is free software; you can use it, redistribute | ||
| // it, and/or modify it under the terms of the GNU Lesser General | ||
| // Public License as published by the Free Software Foundation; either | ||
| // version 2.1 of the License, or (at your option) any later version. | ||
| // The full text of the license can be found in the file LICENSE.md at | ||
| // the top level directory of deal.II. | ||
| // | ||
| // --------------------------------------------------------------------- | ||
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| #ifndef dealii_cgal_additional_data_h | ||
| #define dealii_cgal_additional_data_h | ||
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| #include <deal.II/base/config.h> | ||
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| #ifdef DEAL_II_WITH_CGAL | ||
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| # include <CGAL/boost/graph/Named_function_parameters.h> | ||
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| DEAL_II_NAMESPACE_OPEN | ||
| namespace CGALWrappers | ||
| { | ||
| /** | ||
| * Struct that must be used to pass additional | ||
| * arguments to the CGAL::Mesh_criteria_3 class (see | ||
| * https://doc.cgal.org/latest/Mesh_3/index.html for more information.) | ||
| * | ||
| * The arguments allow for fine control on the size, quality, and distribution | ||
| * of the cells of the final triangulation. CGAL uses Boost named parameters | ||
| * for these arguments in dimension three, i.e., they must be specified with | ||
| * the syntax `CGAL::parameters::parameter_name=parameter_value`, irrespective | ||
| * of their order. Accepted parameters are: | ||
| * | ||
| * - `CGAL::parameters::edge_size`: a constant | ||
| * providing a uniform upper bound for the lengths of | ||
| * curve edges. This parameter has to be set to a positive value when | ||
| * 1-dimensional features protection is used. | ||
| * - `CGAL::parameters::facet_angle`: a lower bound for the angles (in | ||
| * degrees) of the surface mesh facets. | ||
| * - `CGAL::parameters::facet_size`: a constant | ||
| * describing a uniform upper bound for the radii | ||
| * of the surface Delaunay balls. | ||
| * - `CGAL::parameters::facet_distance`: a constant | ||
| * describing a uniform upper bound for the distance | ||
| * between the facet circumcenter and the center of its surface Delaunay ball. | ||
| * - `CGAL::parameters::facet_topology`: the set of topological constraints | ||
| * which have to be verified by each surface facet. The default value is | ||
| * `CGAL::FACET_VERTICES_ON_SURFACE`. See CGAL::Mesh_facet_topology manual | ||
| * page to get all possible values. | ||
| * - `CGAL::parameters::cell_radius_edge_ratio`: an upper bound for the | ||
| * radius-edge ratio of the mesh tetrahedra. | ||
| * - `CGAL::parameters::cell_size`: a constant | ||
| * describing a uniform upper bound for the | ||
| * circumradii of the mesh tetrahedra. | ||
| * | ||
| * @note This struct must be instantiated with `dim=3`. | ||
| */ | ||
| template <int dim> | ||
| struct AdditionalData | ||
| { | ||
| double facet_angle; | ||
| double facet_size; | ||
| double facet_distance; | ||
| double cell_radius_edge_ratio; | ||
| double cell_size; | ||
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| AdditionalData( | ||
| double facet_a = CGAL::parameters::is_default_parameter(true), | ||
| double facet_s = CGAL::parameters::is_default_parameter(true), | ||
| double facet_d = CGAL::parameters::is_default_parameter(true), | ||
| double cell_radius_edge_r = CGAL::parameters::is_default_parameter(true), | ||
| double cell_s = CGAL::parameters::is_default_parameter(true)) | ||
| { | ||
| AssertThrow( | ||
| dim == 3, | ||
| ExcMessage( | ||
| "These struct can be instantiated with 3D Triangulations only.")); | ||
| facet_angle = facet_a; | ||
| facet_size = facet_s; | ||
| facet_distance = facet_d; | ||
| cell_radius_edge_ratio = cell_radius_edge_r; | ||
| cell_size = cell_s; | ||
| } | ||
| }; | ||
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| /** | ||
| * Specialization of the above struct when the object to be constructed is | ||
| a | ||
| * 2D triangulation embedded in the 3D space, i.e. a Triangulation<2,3>. | ||
| * Only three parameters are accepted: | ||
| * - `angular_bound` is a lower bound in degrees for the angles of mesh | ||
| * facets. | ||
| * - `radius_bound` is an upper bound on the radii of surface Delaunay | ||
| balls. | ||
| * A surface Delaunay ball is a ball circumscribing a mesh facet and | ||
| centered | ||
| * on the surface. | ||
| * - `distance_bound` is an upper bound for the distance between the | ||
| * circumcenter of a mesh facet and the center of a surface Delaunay ball | ||
| of | ||
| * this facet. | ||
| */ | ||
| template <> | ||
| struct AdditionalData<2> | ||
| { | ||
| double angular_bound, radius_bound, distance_bound; | ||
| AdditionalData(double angular_b = 0., | ||
| double radius_b = 0., | ||
| double distance_b = 0.) | ||
| { | ||
| angular_bound = angular_b; | ||
| radius_bound = radius_b; | ||
| distance_bound = distance_b; | ||
| } | ||
| }; | ||
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| } // namespace CGALWrappers | ||
| DEAL_II_NAMESPACE_CLOSE | ||
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| #else | ||
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| DEAL_II_NAMESPACE_OPEN | ||
| namespace CGALWrappers | ||
| { | ||
| template <int dim> | ||
| struct AdditionalData | ||
| {}; | ||
| } // namespace CGALWrappers | ||
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| DEAL_II_NAMESPACE_CLOSE | ||
| #endif | ||
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| #endif |
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