GeoLib::Surface Class Reference

Detailed Description

A Surface is represented by Triangles. It consists of a reference to a vector of (pointers to) points (_sfc_pnts) and a vector that stores the Triangles consisting of points from _sfc_pnts.

Definition at line 32 of file Surface.h.

#include <Surface.h>

Inheritance diagram for GeoLib::Surface:

Collaboration diagram for GeoLib::Surface:

Public Member Functions
	Surface (const std::vector< Point * > &pnt_vec)
	Surface (Surface const &src)
	~Surface () override
	Surface (Surface &&src)=delete
Surface &	operator= (Surface const &src)=delete
Surface &	operator= (Surface &&src)=delete
GEOTYPE	getGeoType () const override
	return a geometry type
void	addTriangle (std::size_t pnt_a, std::size_t pnt_b, std::size_t pnt_c)
std::size_t	getNumberOfTriangles () const
const Triangle *	operator[] (std::size_t i) const
	const access operator for the access to the i-th Triangle of the surface.
bool	isPntInBoundingVolume (MathLib::Point3d const &pnt, double eps) const
bool	isPntInSfc (MathLib::Point3d const &pnt, double eps) const
const std::vector< Point * > *	getPointVec () const
AABB const &	getAABB () const
Public Member Functions inherited from GeoLib::GeoObject
virtual	~GeoObject ()=default

Protected Attributes
const std::vector< Point * > &	_sfc_pnts
std::vector< Triangle * >	_sfc_triangles
std::unique_ptr< AABB >	_bounding_volume
std::unique_ptr< SurfaceGrid >	_surface_grid

Constructor & Destructor Documentation

Surface() [1/3]

GeoLib::Surface::Surface ( const std::vector< Point * > & pnt_vec )

explicit

Definition at line 24 of file Surface.cpp.

    : _sfc_pnts(pnt_vec), _bounding_volume(nullptr), _surface_grid(nullptr)
{
}

Surface() [2/3]

GeoLib::Surface::Surface

(

Surface const &

src

)

Definition at line 29 of file Surface.cpp.

    : _sfc_pnts(src._sfc_pnts),
      _bounding_volume(new AABB(*(src._bounding_volume))),
      _surface_grid(nullptr)
{
    _sfc_triangles.reserve(src._sfc_triangles.size());
    std::transform(src._sfc_triangles.cbegin(),
                   src._sfc_triangles.cend(),
                   std::back_inserter(_sfc_triangles),
                   [](Triangle* t) { return new Triangle(*t); });
}

References _sfc_triangles.

~Surface()

GeoLib::Surface::~Surface ( )

override

Definition at line 41 of file Surface.cpp.

{
    for (auto& _sfc_triangle : _sfc_triangles)
    {
        delete _sfc_triangle;
    }
}

References _sfc_triangles.

Surface() [3/3]

GeoLib::Surface::Surface ( Surface && src )

delete

Member Function Documentation

addTriangle()

void GeoLib::Surface::addTriangle	(	std::size_t	pnt_a,
		std::size_t	pnt_b,
		std::size_t	pnt_c )

adds three indices describing a triangle and updates the bounding box

Definition at line 49 of file Surface.cpp.

{
    assert(pnt_a < _sfc_pnts.size() && pnt_b < _sfc_pnts.size() &&
           pnt_c < _sfc_pnts.size());
 
    // Check if two points of the triangle have identical IDs
    if (pnt_a == pnt_b || pnt_a == pnt_c || pnt_b == pnt_c)
    {
        return;
    }
 
    // Adding a new triangle invalides the surface grid.
    _surface_grid.reset();
 
    _sfc_triangles.push_back(new Triangle(_sfc_pnts, pnt_a, pnt_b, pnt_c));
    if (!_bounding_volume)
    {
        std::vector<std::size_t> ids(3);
        ids[0] = pnt_a;
        ids[1] = pnt_b;
        ids[2] = pnt_c;
        _bounding_volume = std::make_unique<GeoLib::AABB>(_sfc_pnts, ids);
    }
    else
    {
        _bounding_volume->update(*_sfc_pnts[pnt_a]);
        _bounding_volume->update(*_sfc_pnts[pnt_b]);
        _bounding_volume->update(*_sfc_pnts[pnt_c]);
    }
}

References _bounding_volume, _sfc_pnts, _sfc_triangles, and _surface_grid.

Referenced by anonymous_namespace{convertMeshToGeo.cpp}::addElementToSurface().

getAABB()

AABB const & GeoLib::Surface::getAABB ( ) const

inline

method allows access to the internal axis aligned bounding box

Returns

axis aligned bounding box

Definition at line 78 of file Surface.h.

{ return *_bounding_volume; }

References _bounding_volume.

getGeoType()

GEOTYPE GeoLib::Surface::getGeoType ( ) const

inlineoverridevirtual

return a geometry type

Implements GeoLib::GeoObject.

Definition at line 44 of file Surface.h.

{ return GEOTYPE::SURFACE; }

References GeoLib::SURFACE.

getNumberOfTriangles()

std::size_t GeoLib::Surface::getNumberOfTriangles

(

)

const

returns the number of triangles describing the Surface

Definition at line 82 of file Surface.cpp.

{
    return _sfc_triangles.size();
}

References _sfc_triangles.

Referenced by GEOModels::addNameForObjectPoints(), GeoLib::IO::BoostXmlGmlInterface::addSurfacesToPropertyTree(), MeshToolsLib::convertSurfaceToMesh(), GeoLib::markUsedPoints(), GeoLib::GEOObjects::mergeSurfaces(), GeoLib::resetPointIDs(), GeoLib::SurfaceGrid::sortTrianglesInGridCells(), and GeoLib::IO::TINInterface::writeSurfaceAsTIN().

getPointVec()

const std::vector< Point * > * GeoLib::Surface::getPointVec ( ) const

inline

Definition at line 73 of file Surface.h.

{ return &_sfc_pnts; }

References _sfc_pnts.

Referenced by GeoLib::markUsedPoints(), and GeoLib::resetPointIDs().

isPntInBoundingVolume()

bool GeoLib::Surface::isPntInBoundingVolume	(	MathLib::Point3d const &	pnt,
		double	eps ) const

is the given point in the bounding volume of the surface

Definition at line 93 of file Surface.cpp.

{
    return _bounding_volume->containsPoint(pnt, eps);
}

References _bounding_volume.

Referenced by MeshGeoToolsLib::MeshNodesAlongSurface::MeshNodesAlongSurface().

isPntInSfc()

bool GeoLib::Surface::isPntInSfc	(	MathLib::Point3d const &	pnt,
		double	eps ) const

is the given point pnt located in the surface

Parameters

pnt	the point
eps	geometric tolerance for the search

Returns

true if the point is contained in the surface

Definition at line 99 of file Surface.cpp.

{
    // Mutable _surface_grid is constructed if method is called the first time.
    if (_surface_grid == nullptr)
    {
        _surface_grid = std::make_unique<GeoLib::SurfaceGrid>(this);
    }
    return _surface_grid->isPointInSurface(pnt, eps);
}

References _surface_grid.

Referenced by MeshGeoToolsLib::MeshNodesAlongSurface::MeshNodesAlongSurface().

operator=() [1/2]

Surface & GeoLib::Surface::operator= ( Surface && src )

delete

operator=() [2/2]

Surface & GeoLib::Surface::operator= ( Surface const & src )

delete

operator[]()

const Triangle * GeoLib::Surface::operator[]

(

std::size_t

i

)

const

const access operator for the access to the i-th Triangle of the surface.

Definition at line 87 of file Surface.cpp.

{
    assert(i < _sfc_triangles.size());
    return _sfc_triangles[i];
}

References _sfc_triangles.

Member Data Documentation

_bounding_volume

std::unique_ptr<AABB> GeoLib::Surface::_bounding_volume

protected

bounding volume is an axis aligned bounding box

Definition at line 86 of file Surface.h.

Referenced by addTriangle(), getAABB(), and isPntInBoundingVolume().

_sfc_pnts

const std::vector<Point*>& GeoLib::Surface::_sfc_pnts

protected

a vector of pointers to Points

Definition at line 82 of file Surface.h.

Referenced by addTriangle(), and getPointVec().

_sfc_triangles

std::vector<Triangle*> GeoLib::Surface::_sfc_triangles

protected

position of pointers to the geometric points

Definition at line 84 of file Surface.h.

Referenced by Surface(), ~Surface(), addTriangle(), getNumberOfTriangles(), and operator[]().

_surface_grid

std::unique_ptr<SurfaceGrid> GeoLib::Surface::_surface_grid

mutableprotected

The surface grid is a helper data structure to accelerate the point search. The method addTriangle() invalidates/resets the surface grid. A valid surface grid is created in case the const method isPntInSfc() is called and a valid surface grid is not existing.

Definition at line 91 of file Surface.h.

Referenced by addTriangle(), and isPntInSfc().

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The documentation for this class was generated from the following files:

• GeoLib/Surface.h
• GeoLib/Surface.cpp