mirror of https://github.com/CGAL/cgal
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
// Copyright (c) 2022 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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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Julian Stahl
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#ifndef CGAL_EXPLICIT_CARTESIAN_GRID_DOMAIN_H
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#define CGAL_EXPLICIT_CARTESIAN_GRID_DOMAIN_H
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#include <CGAL/license/Isosurfacing_3.h>
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#include <CGAL/Cartesian_grid_3.h>
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#include <CGAL/Default_gradients.h>
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#include <CGAL/Isosurfacing_3/internal/Base_domain.h>
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#include <CGAL/Isosurfacing_3/internal/Cartesian_grid_geometry.h>
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#include <CGAL/Isosurfacing_3/internal/Grid_topology.h>
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namespace CGAL {
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namespace Isosurfacing {
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template <class GeomTraits, typename Gradient_>
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using Explicit_cartesian_grid_domain = Base_domain<GeomTraits, Grid_topology, Cartesian_grid_geometry<GeomTraits>,
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Cartesian_grid_3<GeomTraits>, Gradient_>;
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/**
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* \ingroup PkgIsosurfacing3Ref
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*
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* \brief Creates a domain from a Cartesian_grid_3 that can be used as input for isosurfacing algorithms.
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*
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* \details
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*
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* \tparam GeomTraits the traits type
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*
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* \param grid the cartesian grid containing input data
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* \param gradient a function that describes the gradient of the data
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*/
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template <class GeomTraits, typename Gradient_ = Zero_gradient<GeomTraits>>
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Explicit_cartesian_grid_domain<GeomTraits, Gradient_> create_explicit_cartesian_grid_domain(
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const std::shared_ptr<Cartesian_grid_3<GeomTraits>> grid, const Gradient_& gradient = Gradient_()) {
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typedef Explicit_cartesian_grid_domain<GeomTraits, Gradient_> Domain;
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typedef typename Domain::Topology Topology;
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typedef typename Domain::Geometry Geometry;
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typedef typename Domain::Function Function;
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typedef typename Domain::Gradient Gradient;
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const std::size_t size_i = grid->xdim();
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const std::size_t size_j = grid->ydim();
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const std::size_t size_k = grid->zdim();
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const Bbox_3& bbox = grid->get_bbox();
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const typename GeomTraits::Vector_3 offset(bbox.xmin(), bbox.ymin(), bbox.zmin());
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const typename GeomTraits::Vector_3 spacing = grid->get_spacing();
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const Topology topo = std::make_shared<Topology::element_type>(size_i, size_j, size_k);
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const Geometry geom = std::make_shared<Geometry::element_type>(offset, spacing);
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const Function func = grid;
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const Gradient grad = std::make_shared<Gradient::element_type>(gradient);
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return Domain(topo, geom, func, grad);
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}
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} // namespace Isosurfacing
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} // namespace CGAL
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#endif // CGAL_EXPLICIT_CARTESIAN_GRID_DOMAIN_H
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