faceDecomposition.H

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | cfMesh: A library for mesh generation
   \\    /   O peration     |
    \\  /    A nd           | Author: Franjo Juretic (franjo.juretic@c-fields.com)
     \\/     M anipulation  | Copyright (C) Creative Fields, Ltd.
-------------------------------------------------------------------------------
License
    This file is part of cfMesh.
 
    cfMesh 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.
 
    cfMesh 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 cfMesh.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    faceDecomposition
 
Description
    Decomposition of a face into triangles
 
SourceFiles
    faceDecomposition.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef faceDecomposition_H
#define faceDecomposition_H
 
#include "faceList.H"
#include "pointField.H"
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class faceDecomposition Declaration
\*---------------------------------------------------------------------------*/
 
class faceDecomposition
{
    // private data
        const face& f_;
    
        const pointField& points_;
 
    // private member functions
        //- find concave vertex and return its position
        //- in the face
        label concaveVertex() const;
    
        //- decomposes the face into triangle starting from
        //- the given vertex
        faceList decomposeFaceIntoTriangles(const label cv) const;
 
        //- disallows bitwise construct
        void operator=(const faceDecomposition&);
 
        //- copy constructor
        faceDecomposition(const faceDecomposition&);
 
public:
 
    // Constructors
 
        //- construct components
        faceDecomposition
        (
            const face&,
            const pointField&
        );
 
        //- Destructor
        ~faceDecomposition();
 
    // Member functions
        //- check if the face is convex
        bool isFaceConvex() const;
 
        //- check if the face is planar
        bool isFacePlanar() const;
        bool isFacePlanar(const scalar tol) const;
 
        //- decompose face into triangles
        faceList decomposeFaceIntoTriangles() const;
        
        //- decompose face into the minimal number
        //- of convex faces
        faceList decomposeFace() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //