/usr/include/dolfin/geometry/CollisionPredicates.h is in libdolfin-dev 2017.2.0.post0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This file is part of DOLFIN.
//
// DOLFIN is free software: you can 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// First added: 2014-02-03
// Last changed: 2017-09-29
#ifndef __COLLISION_PREDICATES_H
#define __COLLISION_PREDICATES_H
namespace dolfin
{
// Forward declarations
class Point;
class MeshEntity;
/// This class implements algorithms for detecting pairwise
/// collisions between mesh entities of varying dimensions.
class CollisionPredicates
{
public:
//--- High-level collision detection predicates ---
/// Check whether entity collides with point.
///
/// *Arguments*
/// entity (_MeshEntity_)
/// The entity.
/// point (_Point_)
/// The point.
///
/// *Returns*
/// bool
/// True iff entity collides with cell.
static bool collides(const MeshEntity& entity,
const Point& point);
/// Check whether two entities collide.
///
/// *Arguments*
/// entity_0 (_MeshEntity_)
/// The first entity.
/// entity_1 (_MeshEntity_)
/// The second entity.
///
/// *Returns*
/// bool
/// True iff entity collides with cell.
static bool collides(const MeshEntity& entity_0,
const MeshEntity& entity_1);
//--- Low-level collision detection predicates ---
/// Check whether segment p0-p1 collides with point
static bool collides_segment_point(const Point& p0,
const Point& p1,
const Point& point,
std::size_t gdim);
/// Check whether segment p0-p1 collides with point (1D version)
static bool collides_segment_point_1d(double p0,
double p1,
double point);
/// Check whether segment p0-p1 collides with point (2D version)
static bool collides_segment_point_2d(const Point& p0,
const Point& p1,
const Point& point);
/// Check whether segment p0-p1 collides with point (3D version)
static bool collides_segment_point_3d(const Point& p0,
const Point& p1,
const Point& point);
/// Check whether segment p0-p1 collides with segment q0-q1
static bool collides_segment_segment(const Point& p0,
const Point& p1,
const Point& q0,
const Point& q1,
std::size_t gdim);
/// Check whether segment p0-p1 collides with segment q0-q1 (1D version)
static bool collides_segment_segment_1d(double p0,
double p1,
double q0,
double q1);
/// Check whether segment p0-p1 collides with segment q0-q1 (2D version)
static bool collides_segment_segment_2d(const Point& p0,
const Point& p1,
const Point& q0,
const Point& q1);
/// Check whether segment p0-p1 collides with segment q0-q1 (3D version)
static bool collides_segment_segment_3d(const Point& p0,
const Point& p1,
const Point& q0,
const Point& q1);
/// Check whether triangle p0-p1-p2 collides with point
static bool collides_triangle_point(const Point& p0,
const Point& p1,
const Point& p2,
const Point& point,
std::size_t gdim);
/// Check whether triangle p0-p1-p2 collides with point (2D version)
static bool collides_triangle_point_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& point);
/// Check whether triangle p0-p1-p2 collides with point (3D version)
static bool collides_triangle_point_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& point);
/// Check whether triangle p0-p1-p2 collides with segment q0-q1
static bool collides_triangle_segment(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
std::size_t gdim);
/// Check whether triangle p0-p1-p2 collides with segment q0-q1 (2D version)
static bool collides_triangle_segment_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1);
/// Check whether triangle p0-p1-p2 collides with segment q0-q1 (3D version)
static bool collides_triangle_segment_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1);
/// Check whether triangle p0-p1-p2 collides with triangle q0-q1-q2
static bool collides_triangle_triangle(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
const Point& q2,
std::size_t gdim);
/// Check whether triangle p0-p1-p2 collides with triangle q0-q1-q2 (2D version)
static bool collides_triangle_triangle_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
const Point& q2);
/// Check whether triangle p0-p1-p2 collides with triangle q0-q1-q2 (3D version)
static bool collides_triangle_triangle_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
const Point& q2);
/// Check whether tetrahedron p0-p1-p2-p3 collides with point
static bool collides_tetrahedron_point_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& point);
/// Check whether tetrahedron p0-p1-p2-p3 collides with segment q0-q1
static bool collides_tetrahedron_segment_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1);
/// Check whether tetrahedron p0-p1-p2-p3 collides with triangle q0-q1-q2
static bool collides_tetrahedron_triangle_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1,
const Point& q2);
/// Check whether tetrahedron p0-p1-p2-p3 collides with tetrahedron q0-q1-q2
static bool collides_tetrahedron_tetrahedron_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1,
const Point& q2,
const Point& q3);
private:
// Implementation of collision detection predicates
static bool _collides_segment_point_1d(double p0,
double p1,
double point);
static bool _collides_segment_point_2d(const Point& p0,
const Point& p1,
const Point& point);
static bool _collides_segment_point_3d(const Point& p0,
const Point& p1,
const Point& point);
static bool _collides_segment_segment_1d(double p0,
double p1,
double q0,
double q1);
static bool _collides_segment_segment_2d(const Point& p0,
const Point& p1,
const Point& q0,
const Point& q1);
static bool _collides_segment_segment_3d(const Point& p0,
const Point& p1,
const Point& q0,
const Point& q1);
static bool _collides_triangle_point_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& point);
static bool _collides_triangle_point_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& point);
static bool _collides_triangle_segment_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1);
static bool _collides_triangle_segment_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1);
static bool _collides_triangle_triangle_2d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
const Point& q2);
static bool _collides_triangle_triangle_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& q0,
const Point& q1,
const Point& q2);
static bool _collides_tetrahedron_point_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& point);
static bool _collides_tetrahedron_segment_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1);
static bool _collides_tetrahedron_triangle_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1,
const Point& q2);
static bool _collides_tetrahedron_tetrahedron_3d(const Point& p0,
const Point& p1,
const Point& p2,
const Point& p3,
const Point& q0,
const Point& q1,
const Point& q2,
const Point& q3);
};
}
#endif
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