isoSurface Class Reference

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...

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List of all members.

Public Member Functions
	TypeName ("isoSurface")
	Runtime type information.
	isoSurface (const volScalarField &cellIsoVals, const scalarField &pointIsoVals, const scalar iso, const bool regularise, const scalar mergeTol=1E-6)
	Construct from cell values and point values. Uses boundaryField.
const labelList &	meshCells () const
	For every face original cell in mesh.
const labelList &	triPointMergeMap () const
	For every unmerged triangle point the point in the triSurface.
template<class Type >
tmp< Field< Type > >	interpolate (const GeometricField< Type, fvPatchField, volMesh > &cCoords, const Field< Type > &pCoords) const
	Interpolates cCoords,pCoords. Uses the references to the original.

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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

• isoSurface.H
• isoSurface.C

Definition at line 79 of file isoSurface.H.

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Constructor & Destructor Documentation

isoSurface	(	const volScalarField &	cellIsoVals,
		const scalarField &	pointIsoVals,
		const scalar	iso,
		const bool	regularise,
		const scalar	mergeTol = 1E-6
	)

Construct from cell values and point values. Uses boundaryField.

for boundary values. Holds reference to cellIsoVals and pointIsoVals.

Definition at line 1734 of file isoSurface.C.

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Member Function Documentation

TypeName

(

"isoSurface"

)

Runtime type information.

const labelList& meshCells

(

)

const [inline]

For every face original cell in mesh.

Definition at line 433 of file isoSurface.H.

const labelList& triPointMergeMap

(

)

const [inline]

For every unmerged triangle point the point in the triSurface.

Definition at line 439 of file isoSurface.H.

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

Interpolates cCoords,pCoords. Uses the references to the original.

fields used to create the iso surface.

Definition at line 687 of file isoSurfaceTemplates.C.

References Foam::abort(), Foam::endl(), Foam::FatalError, FatalErrorIn, forAll, primitiveMesh::nCells(), primitiveMesh::nPoints(), PrimitivePatch< labelledTri,::Foam::List, pointField, point >::points(), Foam::Pout, List< T >::size(), and List< labelledTri >::size().

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

• src/sampling/sampledSurface/isoSurface/isoSurface.H
• src/sampling/sampledSurface/isoSurface/isoSurface.C
• src/sampling/sampledSurface/isoSurface/isoSurfaceTemplates.C