From: Giovanni Alzetta Date: Fri, 22 Sep 2017 11:31:47 +0000 (+0000) Subject: Added functions merge_with and volume to BoundingBox X-Git-Tag: v9.0.0-rc1~1040^2~1 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22a1a39bb411f56f2649fa6248101f4cd352b9f6;p=dealii.git Added functions merge_with and volume to BoundingBox --- diff --git a/doc/news/changes/minor/20170922GiovanniAlzetta b/doc/news/changes/minor/20170922GiovanniAlzetta new file mode 100644 index 0000000000..38e9cf1efe --- /dev/null +++ b/doc/news/changes/minor/20170922GiovanniAlzetta @@ -0,0 +1,3 @@ +New: Added two methods to the class BoundingBox. The first, merge_with(BoundingBox) merges the current BoundingBox with BBox. The second, volume(), returns the volume (dim-dimensional measure) of the current BoundingBox +
+(Giovanni Alzetta, 2017/09/22) diff --git a/include/deal.II/base/bounding_box.h b/include/deal.II/base/bounding_box.h index bec903d3f1..6afc94203a 100644 --- a/include/deal.II/base/bounding_box.h +++ b/include/deal.II/base/bounding_box.h @@ -72,20 +72,32 @@ public: BoundingBox (const std::pair,Point> &boundary_points); /** - * Returns the boundary_points + * Return the boundary_points */ const std::pair,Point> &get_boundary_points () const; /** - * Returns true if the point is inside the Bounding Box, false otherwise + * Enlarge the current object so that it contains @p other_bbox . + * If the current object already contains @p other_bbox then it is not changed + * by this function. + */ + void merge_with(const BoundingBox &other_bbox); + + /** + * Return true if the point is inside the Bounding Box, false otherwise */ bool point_inside (const Point &p) const; + /** + * Compute the volume (i.e. the dim-dimensional measure) of the BoundingBox. + */ + double volume() const; + private: std::pair,Point> boundary_points; }; -/*------------------------------- Inline functions: Point ---------------------------*/ +/*------------------------------- Inline functions: BoundingBox ---------------------------*/ #ifndef DOXYGEN diff --git a/source/base/bounding_box.cc b/source/base/bounding_box.cc index f2ef5b478a..9390d4b8cc 100644 --- a/source/base/bounding_box.cc +++ b/source/base/bounding_box.cc @@ -31,11 +31,30 @@ bool BoundingBox::point_inside (const Point & return true; } +template +void BoundingBox::merge_with(const BoundingBox &other_bbox) +{ + for (unsigned int i=0; i < spacedim; ++i) + { + this->boundary_points.first[i] = std::min( this->boundary_points.first[i], other_bbox.boundary_points.first[i] ); + this->boundary_points.second[i] = std::max( this->boundary_points.second[i], other_bbox.boundary_points.second[i] ); + } +} + template const std::pair,Point> &BoundingBox::get_boundary_points () const { return this->boundary_points; } +template +double BoundingBox::volume() const +{ + double vol = 1.0; + for (unsigned int i=0; i < spacedim; ++i) + vol *= ( this->boundary_points.second[i] - this->boundary_points.first[i] ); + return vol; +} + #include "bounding_box.inst" DEAL_II_NAMESPACE_CLOSE diff --git a/tests/base/bounding_box_2.cc b/tests/base/bounding_box_2.cc new file mode 100644 index 0000000000..f7c281bd68 --- /dev/null +++ b/tests/base/bounding_box_2.cc @@ -0,0 +1,84 @@ +// --------------------------------------------------------------------- +// +// Copyright (C) 2017 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 at +// the top level of the deal.II distribution. +// +// --------------------------------------------------------------------- + + +// test for BoundingBox which tests the functions +// volume and merge_with of the class + +#include "../tests.h" + +#include +#include + +template +void test_bounding_box() +{ + BoundingBox a; + deallog << "Empty BoundingBox: " << std::endl; + deallog << a.volume() << std::endl; + + + std::pair,Point> unit; + for (int i=0; i b(unit); + deallog << "Bounding box boundaries: " << std::endl; + deallog << b.get_boundary_points().first << std::endl; + deallog << b.get_boundary_points().second << std::endl; + deallog << " Boundary Box volume: " << b.volume() << std::endl; + b.merge_with(a); + deallog << "Merging it with 0: volume " << b.volume() << std::endl; + deallog << "Boundary points:" << std::endl; + deallog << b.get_boundary_points().first << std::endl; + deallog << b.get_boundary_points().second << std::endl; + + std::pair,Point> boundaries; + for (int i=0; i c(unit); + deallog << "Bounding box boundaries: " << std::endl; + deallog << c.get_boundary_points().first << std::endl; + deallog << c.get_boundary_points().second << std::endl; + deallog << c.volume() << std::endl; + c.merge_with(b); + deallog << "Merging it with previous: volume " << c.volume() << std::endl; + deallog << "Boundary points:" << std::endl; + deallog << c.get_boundary_points().first << std::endl; + deallog << c.get_boundary_points().second << std::endl; + deallog << "End test for dimension " << spacedim << std::endl; +} + +int main() +{ + initlog(); + + deallog << "Test: Bounding Box class merge and volume functions" << std::endl; + deallog << std::endl << "Test for dimension 1" << std::endl; + test_bounding_box<1>(); + + deallog << std::endl << "Test for dimension 2" << std::endl; + test_bounding_box<2>(); + + deallog << std::endl << "Test for dimension 3" << std::endl; + test_bounding_box<3>(); +} diff --git a/tests/base/bounding_box_2.output b/tests/base/bounding_box_2.output new file mode 100644 index 0000000000..c12cf60e3f --- /dev/null +++ b/tests/base/bounding_box_2.output @@ -0,0 +1,65 @@ + +DEAL::Test: Bounding Box class merge and volume functions +DEAL:: +DEAL::Test for dimension 1 +DEAL::Empty BoundingBox: +DEAL::0.00000 +DEAL::Bounding box boundaries: +DEAL::0.00000 +DEAL::1.00000 +DEAL:: Boundary Box volume: 1.00000 +DEAL::Merging it with 0: volume 1.00000 +DEAL::Boundary points: +DEAL::0.00000 +DEAL::1.00000 +DEAL::Bounding box boundaries: +DEAL::1.00000 +DEAL::2.00000 +DEAL::1.00000 +DEAL::Merging it with previous: volume 2.00000 +DEAL::Boundary points: +DEAL::0.00000 +DEAL::2.00000 +DEAL::End test for dimension 1 +DEAL:: +DEAL::Test for dimension 2 +DEAL::Empty BoundingBox: +DEAL::0.00000 +DEAL::Bounding box boundaries: +DEAL::0.00000 0.00000 +DEAL::1.00000 1.00000 +DEAL:: Boundary Box volume: 1.00000 +DEAL::Merging it with 0: volume 1.00000 +DEAL::Boundary points: +DEAL::0.00000 0.00000 +DEAL::1.00000 1.00000 +DEAL::Bounding box boundaries: +DEAL::1.00000 1.00000 +DEAL::2.00000 3.00000 +DEAL::2.00000 +DEAL::Merging it with previous: volume 6.00000 +DEAL::Boundary points: +DEAL::0.00000 0.00000 +DEAL::2.00000 3.00000 +DEAL::End test for dimension 2 +DEAL:: +DEAL::Test for dimension 3 +DEAL::Empty BoundingBox: +DEAL::0.00000 +DEAL::Bounding box boundaries: +DEAL::0.00000 0.00000 0.00000 +DEAL::1.00000 1.00000 1.00000 +DEAL:: Boundary Box volume: 1.00000 +DEAL::Merging it with 0: volume 1.00000 +DEAL::Boundary points: +DEAL::0.00000 0.00000 0.00000 +DEAL::1.00000 1.00000 1.00000 +DEAL::Bounding box boundaries: +DEAL::1.00000 1.00000 1.00000 +DEAL::2.00000 3.00000 4.00000 +DEAL::6.00000 +DEAL::Merging it with previous: volume 24.0000 +DEAL::Boundary points: +DEAL::0.00000 0.00000 0.00000 +DEAL::2.00000 3.00000 4.00000 +DEAL::End test for dimension 3