/usr/include/libmesh/surface.h is in libmesh-dev 0.7.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | // $Id: surface.h 3874 2010-07-02 21:57:26Z roystgnr $
// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
// This library 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 2.1 of the License, or (at your option) any later version.
// This library 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 this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __surface_h__
#define __surface_h__
// C++ includes
// Local includes
#include "point.h"
namespace libMesh
{
/**
* This class defines a surface. A surface is a two-dimensional
* object living in three-dimensional space. Examples of surfaces
* are planes, hollow spheres, hollow cylinders, etc... This is
* a generic base class that describes the useful functionality
* a surface will provide. Specific derived classes actually implement
* the functionality, so this class has pure virtual members.
*
* @author Benjamin S. Kirk, 2002
*/
// ------------------------------------------------------------
// Surface class definition
class Surface
{
public:
/**
* Constructor. Does nothing at the moment.
*/
Surface () {}
/**
* Copy-constructor.
*/
Surface (const Surface&) {}
/**
* Destructor.
*/
virtual ~Surface () {}
/**
* @returns true if the point p is above the surface,
* false otherwise.
*/
virtual bool above_surface (const Point& p) const = 0;
/**
* @returns true if the point p is below the surface,
* false otherwise.
*/
virtual bool below_surface (const Point& p) const = 0;
/**
* @returns true if the point p is on the surface,
* false otherwise. Note that the definition of on
* the surface really means "very close" to account
* for roundoff error.
*/
virtual bool on_surface (const Point& p) const = 0;
/**
* @returns the closest point on the surface to point p.
*/
virtual Point closest_point (const Point& p) const = 0;
/**
* @returns a unit vector normal to the surface at
* point p.
*/
virtual Point unit_normal (const Point& p) const = 0;
/**
* @returns the \p Point \p world_coords in the
* surface's coordinate system. \p world_coords
* is in the world coordinate system. This method
* is not purely virtual, because there may be surfaces
* that do not have an own coordinate system. These
* simply do not have to overload this method.
*/
virtual Point surface_coords (const Point& world_coords) const;
/**
* @returns the world (cartesian) coordinates for the
* surface coordinates \p surf_coords. This method
* is not purely virtual, because there may be surfaces
* that do not have an own coordinate system. These
* simply do not have to overload this method.
*/
virtual Point world_coords (const Point& surf_coords) const;
protected:
};
// ------------------------------------------------------------
// Surface class member functions
inline
Point Surface::surface_coords (const Point& world_coords) const
{
Point p (world_coords);
return p;
}
inline
Point Surface::world_coords (const Point& surf_coords) const
{
Point p (surf_coords);
return p;
}
} // namespace libMesh
#endif
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