A surface formed by the iso value. After "Regularised Marching Tetrahedra: improved iso-surface extraction", G.M. Treece, R.W. Prager and A.H. Gee. More...

Inheritance diagram for isoSurface:

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Collaboration diagram for isoSurface:

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Public Types
enum	filterType
	Filtering type. More...

Public Types inherited from isoSurfaceBase
enum	algorithmType : uint8_t { ALGO_POINT, ALGO_CELL, ALGO_TOPO }
	The algorithm types. More...

enum	filterType : uint8_t { NONE = 0, CELL, DIAGCELL, PARTIAL = CELL, FULL = DIAGCELL }
	The filtering (regularization) to apply. More...

Public Types inherited from MeshedSurface< face >
typedef face	FaceType
	Face type used. More...

Public Member Functions
	TypeName ("isoSurface")
	Runtime type information. More...

	isoSurface (const volScalarField &cellValues, const scalarField &pointValues, const scalar iso, const isoSurfaceBase::filterType filter, const boundBox &bounds=boundBox::invertedBox, const scalar mergeTol=1e-6)
	Construct from cell values and point values. More...

	isoSurface (const volScalarField &cellValues, const scalarField &pointValues, const scalar iso, const bool regularise, const boundBox &bounds=boundBox::invertedBox, const scalar mergeTol=1e-6)
	Construct from cell values and point values. More...

template<class Type >
tmp< Field< Type > >	interpolate (const GeometricField< Type, fvPatchField, volMesh > &cCoords, const Field< Type > &pCoords) const
	Interpolates cCoords, pCoords. More...

template<class Type >
Foam::tmp< Foam::SlicedGeometricField< Type, Foam::fvPatchField, Foam::slicedFvPatchField, Foam::volMesh > >	adaptPatchFields (const GeometricField< Type, fvPatchField, volMesh > &fld) const

template<class Type >
Foam::label	generateFaceTriPoints (const volScalarField &cVals, const scalarField &pVals, const GeometricField< Type, fvPatchField, volMesh > &cCoords, const Field< Type > &pCoords, const DynamicList< Type > &snappedPoints, const labelList &snappedCc, const labelList &snappedPoint, const label facei, const scalar neiVal, const Type &neiPt, const bool hasNeiSnap, const Type &neiSnapPt, DynamicList< Type > &triPoints, DynamicList< label > &triMeshCells) const

template<class Type >
Foam::tmp< Foam::Field< Type > >	interpolate (const label nPoints, const labelList &triPointMergeMap, const labelList &interpolatedPoints, const List< FixedList< label, 3 >> &interpolatedOldPoints, const List< FixedList< scalar, 3 >> &interpolationWeights, const DynamicList< Type > &unmergedValues)

template<class Type >
Foam::tmp< Foam::Field< Type > >	interpolate (const GeometricField< Type, fvPatchField, volMesh > &cCoords, const Field< Type > &pCoords) const

Public Member Functions inherited from isoSurfaceBase
	isoSurfaceBase (const scalar iso, const boundBox &bounds=boundBox::invertedBox)
	Construct with iso value. More...

scalar	isoValue () const
	The iso-value associated with the surface. More...

const labelList &	meshCells () const
	For each face, the original cell in mesh. More...

labelList &	meshCells ()
	For each face, the original cell in mesh. More...

Public Member Functions inherited from MeshedSurface< face >
	MeshedSurface ()
	Construct null, an empty surface. More...

	MeshedSurface (const MeshedSurface &surf)
	Copy construct. More...

	MeshedSurface (const UnsortedMeshedSurface< face > &surf)
	Copy construct from an UnsortedMeshedSurface. More...

	MeshedSurface (MeshedSurface &&surf)
	Move construct. More...

	MeshedSurface (UnsortedMeshedSurface< face > &&surf)
	Move construct from an UnsortedMeshedSurface. More...

	MeshedSurface (const pointField &pointLst, const UList< face > &faceLst, const UList< surfZone > &zoneLst)
	Copy construct from components (points, faces, zones). More...

	MeshedSurface (pointField &&pointLst, List< face > &&faceLst, const UList< surfZone > &zoneLst)
	Move construct from components (points, faces). More...

	MeshedSurface (const pointField &pointLst, const UList< face > &faceLst, const labelUList &zoneSizes=labelUList(), const UList< word > &zoneNames=UList< word >())
	Copy construct from components (points, faces). More...

	MeshedSurface (pointField &&pointLst, List< face > &&faceLst, const labelUList &zoneSizes=labelUList(), const UList< word > &zoneNames=UList< word >())
	Move construct from components (points, faces). More...

	MeshedSurface (const polyBoundaryMesh &bMesh, const bool globalPoints=false)
	Construct from a boundary mesh with local points/faces. More...

	MeshedSurface (const surfMesh &mesh)
	Construct from a surfMesh. More...

	MeshedSurface (const fileName &name)
	Construct from file name (uses extension to determine type) More...

	MeshedSurface (const fileName &name, const word &ext)
	Construct from file name (uses extension to determine type) More...

	MeshedSurface (Istream &is)
	Construct from Istream. More...

	MeshedSurface (const Time &runTime, const word &surfName=word::null)
	Construct from database. More...

	MeshedSurface (const MeshedSurface< face > &surf)

	MeshedSurface (MeshedSurface< face > &&surf)

bool	read (const fileName &name, const word &ext)
	Read from file. Chooses reader based on explicit extension. More...

virtual bool	read (const fileName &name)
	Read from file. Chooses reader based on detected extension. More...

virtual void	write (const fileName &name, const dictionary &options=dictionary::null) const
	Generic write routine. Chooses writer based on extension. More...

void	write (const Time &t, const word &surfName=word::null) const
	Write to database. More...

	ClassName ("MeshedSurface")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, MeshedSurface, fileExtension,(const fileName &name),(name))

virtual	~MeshedSurface ()
	Destructor. More...

	declareMemberFunctionSelectionTable (void, UnsortedMeshedSurface, write, fileExtension,(const fileName &name, const MeshedSurface< face > &surf, const dictionary &options),(name, surf, options))

label	size () const
	The surface size is the number of faces. More...

const List< face > &	surfFaces () const
	Return const access to the faces. More...

const surfZoneList &	surfZones () const
	Const access to the surface zones. More...

const vectorField &	Sf () const
	Face area vectors (normals) More...

const scalarField &	magSf () const
	Face area magnitudes. More...

const vectorField &	Cf () const
	Face centres. More...

virtual void	clear ()
	Clear all storage. More...

virtual void	addZones (const UList< surfZone > &, const bool cullEmpty=false)
	Add surface zones. More...

virtual void	addZones (const labelUList &sizes, const UList< word > &names, const bool cullEmpty=false)
	Add surface zones. More...

virtual void	addZones (const labelUList &sizes, const bool cullEmpty=false)
	Add surface zones. More...

bool	addZonesToFaces ()
	Propagate zone information on face regions. More...

bool	addZonesToFaces ()
	Specialization for labelledTri. More...

bool	addZonesToFaces ()

virtual void	removeZones ()
	Remove surface zones. More...

virtual void	movePoints (const pointField &newPoints)
	Move points. More...

virtual void	scalePoints (const scalar scaleFactor)
	Scale points. A non-positive factor is ignored. More...

virtual void	cleanup (const bool verbose)
	Remove invalid faces. More...

virtual bool	stitchFaces (const scalar tol=SMALL, const bool verbose=false)

virtual bool	checkFaces (const bool verbose=false)

virtual label	nTriangles () const
	Count number of triangles. More...

virtual label	nTriangles (List< label > &faceMap) const
	Count number of triangles, returning a face map of original ids. More...

virtual label	triangulate ()
	Triangulate in-place, returning the number of triangles added. More...

virtual label	triangulate (List< label > &faceMap)
	Triangulate in-place, returning the number of triangles added. More...

MeshedSurface	subsetMesh (const BoolListType &include, labelList &pointMap, labelList &faceMap) const
	Return new surface. More...

MeshedSurface	subsetMesh (const bitSet &include) const
	Return new surface. More...

MeshedSurface	subsetMesh (const labelHashSet &include) const
	Return new surface. More...

Foam::MeshedSurface< face >	subsetMesh (const BoolListType &include, labelList &pointMap, labelList &faceMap) const

void	swap (MeshedSurface< face > &surf)
	Swap contents. More...

void	transfer (pointField &pointLst, List< face > &faceLst)
	Transfer the components. More...

void	transfer (MeshedSurface< face > &surf)
	Transfer the contents of the argument and annul the argument. More...

void	transfer (UnsortedMeshedSurface< face > &surf)
	Transfer the contents of the argument and annul the argument. More...

autoPtr< MeshedSurface< face > >	releaseGeom ()
	Release (clear) geometry and return for reuse. More...

void	swapFaces (List< face > &faces)
	Swap the stored faces. More...

void	swapPoints (pointField &points)
	Swap the stored points. More...

void	swapZones (surfZoneList &zones)
	Swap the stored zones. More...

void	writeStats (Ostream &os) const

void	operator= (const MeshedSurface< face > &surf)
	Copy assignment. More...

void	operator= (MeshedSurface< face > &&surf)
	Move assignment. More...

	operator MeshedSurfaceProxy< face > () const
	Conversion operator to MeshedSurfaceProxy. More...

Friends
class	isoSurfaceCell
	Declare friendship to share some functionality. More...

class	isoSurfaceTopo

Additional Inherited Members
Static Public Member Functions inherited from isoSurfaceBase
static filterType	getFilterType (const dictionary &dict, const isoSurfaceBase::filterType deflt)
	Get 'regularise' as bool or enumeration. More...

Static Public Member Functions inherited from MeshedSurface< face >
static void	write (const fileName &name, const MeshedSurface< face > &surf, const dictionary &options=dictionary::null)
	Write to file, selecting writer based on its extension. More...

static void	write (const fileName &name, const word &ext, const MeshedSurface< face > &surf, const dictionary &options=dictionary::null)
	Write to file, selecting writer based on the given extension. More...

static bool	canRead (const fileName &name, bool verbose=false)
	Can we read this file format? More...

static bool	canReadType (const word &ext, bool verbose=false)
	Can we read this file format? More...

static bool	canWriteType (const word &ext, bool verbose=false)
	Can we write this file format? More...

static wordHashSet	readTypes ()
	Known readable file-types. More...

static wordHashSet	writeTypes ()
	Known writable file-types. More...

static autoPtr< MeshedSurface >	New (const fileName &name, const word &ext)
	Select constructed from filename (explicit extension) More...

static autoPtr< MeshedSurface >	New (const fileName &name)
	Select constructed from filename (implicit extension) More...

Static Public Attributes inherited from isoSurfaceBase
static const Enum< algorithmType >	algorithmNames
	Names for the iso-surface algorithms. More...

static const Enum< filterType >	filterNames
	Names for the filtering types. More...

Protected Types inherited from isoSurfaceBase
typedef meshedSurface	MeshStorage

Protected Member Functions inherited from MeshedSurface< face >
void	transcribe (MeshedSurface< face > &surf)
	Transfer points/zones from 'face' to other other shapes. More...

void	transcribe (MeshedSurface< face > &surf)

void	transcribe (MeshedSurface< face > &surf)

void	transcribe (MeshedSurface< face > &surf)

void	checkZones ()
	Basic sanity check on zones. More...

pointField &	storedPoints ()
	Non-const access to global points. More...

List< face > &	storedFaces ()
	Non-const access to the faces. More...

surfZoneList &	storedZones ()
	Non-const access to the zones. More...

void	sortFacesAndStore (DynamicList< face > &unsortedFaces, DynamicList< label > &zoneIds, const bool sorted)
	Sort faces by zones and store sorted faces. More...

virtual void	remapFaces (const labelUList &faceMap)
	Set new zones from faceMap. More...

Protected Attributes inherited from isoSurfaceBase
const scalar	iso_
	Iso value. More...

const boundBox	bounds_
	Optional bounds. More...

labelList	meshCells_
	For every face, the original cell in mesh. More...

Detailed Description

A surface formed by the iso value. After "Regularised Marching Tetrahedra: improved iso-surface extraction", G.M. Treece, R.W. Prager and A.H. Gee.

Note:

does tets without using cell centres/cell values. Not tested.
regularisation can create duplicate triangles/non-manifold surfaces. Current handling of those is bit ad-hoc for now and not perfect.
regularisation does not do boundary points so as to preserve the boundary perfectly.
uses geometric merge with fraction of bounding box as distance.
triangles can be between two cell centres so constant sampling does not make sense.
on empty patches behaves like zero gradient.
does not do 2D correctly, creates non-flat iso surface.
on processor boundaries might two overlapping (identical) triangles (one from either side)

The handling on coupled patches is a bit complex. All fields (values and coordinates) get rewritten so

empty patches get zerogradient (value) and facecentre (coordinates)
separated processor patch faces get interpolate (value) and facecentre (coordinates). (this is already the default for cyclics)
non-separated processor patch faces keep opposite value and cell centre

Now the triangle generation on non-separated processor patch faces can use the neighbouring value. Any separated processor face or cyclic face gets handled just like any boundary face.

Source files

Definition at line 89 of file isoSurface.H.

Member Enumeration Documentation

◆ filterType

enum filterType : uint8_t

strong

Filtering type.

Definition at line 87 of file isoSurfaceBase.H.

Constructor & Destructor Documentation

◆ isoSurface() [1/2]

isoSurface	(	const volScalarField &	cellValues,
		const scalarField &	pointValues,
		const scalar	iso,
		const isoSurfaceBase::filterType	filter,
		const boundBox &	bounds = `boundBox::invertedBox`,
		const scalar	mergeTol = `1e-6`
	)

Construct from cell values and point values.

Uses boundaryField for boundary values. Holds reference to cellIsoVals and pointIsoVals.

Parameters

bounds	optional bounding box for trimming
mergeTol	fraction of mesh bounding box for merging points

Definition at line 1339 of file isoSurface.C.

◆ isoSurface() [2/2]

isoSurface	(	const volScalarField &	cellValues,
		const scalarField &	pointValues,
		const scalar	iso,
		const bool	regularise,
		const boundBox &	bounds = `boundBox::invertedBox`,
		const scalar	mergeTol = `1e-6`
	)

Construct from cell values and point values.

Uses boundaryField for boundary values. Holds reference to cellIsoVals and pointIsoVals.

Parameters

bounds	optional bounding box for trimming
mergeTol	fraction of mesh bounding box for merging points

Definition at line 1361 of file isoSurface.C.

References triSurface::clearOut(), polyPatch::coupled(), Foam::expressions::patchExpr::debug, Foam::dimLength, Foam::dimless, Foam::endl(), f(), forAll, Foam::inplaceRenumber(), Foam::max(), Foam::min(), Foam::nl, IOobject::NO_READ, IOobject::NO_WRITE, patches, polyPatch::patchSlice(), fileName::path(), Foam::Pout, GeometricField< Type, PatchField, GeoMesh >::primitiveField(), GeometricField< Type, PatchField, GeoMesh >::primitiveFieldRef(), List< T >::set(), List< T >::setSize(), FixedList< T, N >::size(), polyPatch::start(), triSurface::swapPoints(), fvMesh::time(), Time::timeName(), List< T >::transfer(), triSurface::triFaceFaces(), triSurfaceTools::validTri(), Ostream::write(), and Foam::Zero.

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Member Function Documentation

◆ TypeName()

TypeName ( "isoSurface" )

Runtime type information.

◆ interpolate() [1/3]

tmp<Field<Type> > interpolate	(	const GeometricField< Type, fvPatchField, volMesh > &	cCoords,
		const Field< Type > &	pCoords
	)		const

Interpolates cCoords, pCoords.

Uses the references to the original fields used to create the iso surface.

◆ adaptPatchFields()

Foam::tmp<Foam::SlicedGeometricField< Type, Foam::fvPatchField, Foam::slicedFvPatchField, Foam::volMesh> > adaptPatchFields ( const GeometricField< Type, fvPatchField, volMesh > & fld ) const

Definition at line 47 of file isoSurfaceTemplates.C.

References f(), fld, forAll, mesh, Foam::New(), patches, fvPatchField< Type >::patchInternalField(), and fvPatchField< Type >::patchNeighbourField().

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◆ generateFaceTriPoints()

Foam::label generateFaceTriPoints	(	const volScalarField &	cVals,
		const scalarField &	pVals,
		const GeometricField< Type, fvPatchField, volMesh > &	cCoords,
		const Field< Type > &	pCoords,
		const DynamicList< Type > &	snappedPoints,
		const labelList &	snappedCc,
		const labelList &	snappedPoint,
		const label	facei,
		const scalar	neiVal,
		const Type &	neiPt,
		const bool	hasNeiSnap,
		const Type &	neiSnapPt,
		DynamicList< Type > &	triPoints,
		DynamicList< label > &	triMeshCells
	)		const

Definition at line 447 of file isoSurfaceTemplates.C.

References DynamicList< T, SizeMin >::append(), f(), forAll, FixedList< T, N >::size(), and Foam::Zero.

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◆ interpolate() [2/3]

Foam::tmp<Foam::Field<Type> > interpolate	(	const label	nPoints,
		const labelList &	triPointMergeMap,
		const labelList &	interpolatedPoints,
		const List< FixedList< label, 3 >> &	interpolatedOldPoints,
		const List< FixedList< scalar, 3 >> &	interpolationWeights,
		const DynamicList< Type > &	unmergedValues
	)

Definition at line 748 of file isoSurfaceTemplates.C.

References forAll, Foam::New(), nPoints, Foam::HashTableOps::values(), and Foam::Zero.

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◆ interpolate() [3/3]

Foam::tmp<Foam::Field<Type> > interpolate	(	const GeometricField< Type, fvPatchField, volMesh > &	cCoords,
		const Field< Type > &	pCoords
	)		const

Definition at line 811 of file isoSurfaceTemplates.C.

References Foam::constant::physicoChemical::c2, Foam::interpolate(), and points.

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Friends And Related Function Documentation

◆ isoSurfaceCell

friend class isoSurfaceCell

friend

Declare friendship to share some functionality.

Definition at line 385 of file isoSurface.H.

◆ isoSurfaceTopo

friend class isoSurfaceTopo

friend

Definition at line 386 of file isoSurface.H.

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

src/sampling/surface/isoSurface/isoSurface.H
src/sampling/surface/isoSurface/isoSurface.C
src/sampling/surface/isoSurface/isoSurfaceTemplates.C

Public Types

Public Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ filterType

Constructor & Destructor Documentation

◆ isoSurface() [1/2]

◆ isoSurface() [2/2]

Member Function Documentation

◆ TypeName()

◆ interpolate() [1/3]

◆ adaptPatchFields()

◆ generateFaceTriPoints()

◆ interpolate() [2/3]

◆ interpolate() [3/3]

Friends And Related Function Documentation

◆ isoSurfaceCell

◆ isoSurfaceTopo