meshTools.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM 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 General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Namespace
    Foam::meshTools
 
Description
    Collection of static functions to do various simple mesh related things.
 
SourceFiles
    meshTools.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_meshTools_H
#define Foam_meshTools_H
 
#include "label.H"
#include "vector.H"
#include "triad.H"
#include "labelList.H"
#include "faceList.H"
#include "cellList.H"
#include "primitivePatch.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class polyMesh;
class primitiveMesh;
class treeBoundBox;
 
/*---------------------------------------------------------------------------*\
                        Namespace meshTools Declaration
\*---------------------------------------------------------------------------*/
 
namespace meshTools
{
    // Bit identifiers for octants (p=plus, m=min e.g. plusXminYminZ)
 
    static const label mXmYmZ = 0;
    static const label pXmYmZ = 1;
    static const label mXpYmZ = 2;
    static const label pXpYmZ = 3;
 
    static const label mXmYpZ = 4;
    static const label pXmYpZ = 5;
    static const label mXpYpZ = 6;
    static const label pXpYpZ = 7;
 
    static const label mXmYmZMask = 1 << mXmYmZ;
    static const label pXmYmZMask = 1 << pXmYmZ;
    static const label mXpYmZMask = 1 << mXpYmZ;
    static const label pXpYmZMask = 1 << pXpYmZ;
 
    static const label mXmYpZMask = 1 << mXmYpZ;
    static const label pXmYpZMask = 1 << pXmYpZ;
    static const label mXpYpZMask = 1 << mXpYpZ;
    static const label pXpYpZMask = 1 << pXpYpZ;
 
 
    // Normal handling
 
        //- Check if n is in same direction as normals of all faceLabels
        bool visNormal
        (
            const vector& n,
            const vectorField& faceNormals,
            const labelList& faceLabels
        );
 
        //- Calculate point normals on a 'box' mesh (all edges aligned with
        //  coordinate axes)
        vectorField calcBoxPointNormals(const primitivePatch& pp);
 
        //- Normalized edge vector
        vector normEdgeVec(const primitiveMesh&, const label edgeI);
 
 
    // OBJ writing
 
        //- Write obj representation of a point
        void writeOBJ
        (
            Ostream& os,
            const point& pt
        );
 
        //- Write obj representation of points
        void writeOBJ
        (
            Ostream& os,
            const UList<point>& pts
        );
 
        //- Write obj representation of a triad. Requires the origin of the
        //  triad to be supplied
        void writeOBJ
        (
            Ostream& os,
            const triad& t,
            const point& origin
        );
 
        //- Write obj representation of a line connecting two points.
        //  Need to keep track of points that have been added. count starts at 0
        void writeOBJ
        (
            Ostream& os,
            const point& p1,
            const point& p2,
            label& count
        );
 
        //- Write obj representation of a point p1 with a vector from p1 to p2
        void writeOBJ
        (
            Ostream& os,
            const point& p1,
            const point& p2
        );
 
        //- Write obj representation of tree-bounding box as a series of lines
        void writeOBJ
        (
            Ostream& os,
            const treeBoundBox& bb
        );
 
        //- Write obj representation of faces subset
        template<class FaceType>
        void writeOBJ
        (
            Ostream& os,
            const UList<FaceType>& faces,
            const UList<point>& points,
            const labelList& faceLabels
        );
 
        //- Write obj representation of faces
        template<class FaceType>
        void writeOBJ
        (
            Ostream& os,
            const UList<FaceType>& faces,
            const UList<point>& points
        );
 
        //- Write obj representation of cell subset
        void writeOBJ
        (
            Ostream& os,
            const cellList& cells,
            const faceList& faces,
            const UList<point>& points,
            const labelList& cellLabels
        );
 
 
    // Cell/face/edge walking
 
        //- Is edge used by cell
        bool edgeOnCell
        (
            const primitiveMesh& mesh,
            const label celli,
            const label edgeI
        );
 
        //- Is edge used by face
        bool edgeOnFace
        (
            const primitiveMesh& mesh,
            const label facei,
            const label edgeI
        );
 
        //- Is face used by cell
        bool faceOnCell
        (
            const primitiveMesh& mesh,
            const label celli,
            const label facei
        );
 
        //- Return edge among candidates that uses the two vertices.
        label findEdge
        (
            const edgeList& edges,
            const labelList& candidates,
            const label v0,
            const label v1
        );
 
        //- Return edge between two mesh vertices. Returns -1 if no edge.
        label findEdge
        (
            const primitiveMesh& mesh,
            const label v0,
            const label v1
        );
 
        //- Return edge shared by two faces. Throws error if no edge found.
        label getSharedEdge
        (
            const primitiveMesh& mesh,
            const label f0,
            const label f1
        );
 
        //- Return face shared by two cells. Throws error if none found.
        label getSharedFace
        (
            const primitiveMesh& mesh,
            const label cell0,
            const label cell1
        );
 
        //- Get faces on cell using edgeI. Throws error if no two found.
        void getEdgeFaces
        (
            const primitiveMesh& mesh,
            const label celli,
            const label edgeI,
            label& face0,
            label& face1
        );
 
        //- Return label of other edge (out of candidates edgeLabels)
        //  connected to vertex but not edgeI. Throws error if none found.
        label otherEdge
        (
            const primitiveMesh& mesh,
            const labelList& edgeLabels,
            const label thisEdgeI,
            const label thisVertI
        );
 
        //- Return face on cell using edgeI but not facei. Throws error
        //  if none found.
        label otherFace
        (
            const primitiveMesh& mesh,
            const label celli,
            const label facei,
            const label edgeI
        );
 
        //- Return cell on other side of face. Throws error
        //  if face not internal.
        label otherCell
        (
            const primitiveMesh& mesh,
            const label celli,
            const label facei
        );
 
        //- Returns label of edge nEdges away from startEdge (in the direction
        // of startVertI)
        label walkFace
        (
            const primitiveMesh& mesh,
            const label facei,
            const label startEdgeI,
            const label startVertI,
            const label nEdges
        );
 
 
    // Constraints on position
 
        //- Set the constrained components of position to mesh centre
        void constrainToMeshCentre
        (
            const polyMesh& mesh,
            point& pt
        );
        void constrainToMeshCentre
        (
            const polyMesh& mesh,
            pointField& pt
        );
 
        //- Set the constrained components of directions/velocity to zero
        void constrainDirection
        (
            const polyMesh& mesh,
            const Vector<label>& dirs,
            vector& d
        );
        void constrainDirection
        (
            const polyMesh& mesh,
            const Vector<label>& dirs,
            vectorField& d
        );
 
 
    // Hex only functionality.
 
        //- Given edge on hex find other 'parallel', non-connected edges.
        void getParallelEdges
        (
            const primitiveMesh& mesh,
            const label celli,
            const label e0,
            label& e1,
            label& e2,
            label& e3
        );
 
        //- Given edge on hex find all 'parallel' (i.e. non-connected)
        //  edges and average direction of them
        vector edgeToCutDir
        (
            const primitiveMesh& mesh,
            const label celli,
            const label edgeI
        );
 
        //- Reverse of edgeToCutDir: given direction find edge bundle and
        //  return one of them.
        label cutDirToEdge
        (
            const primitiveMesh& mesh,
            const label celli,
            const vector& cutDir
        );
 
} // End namespace meshTools
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "meshToolsTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //