TriangularMesh.h

//=======================================================================================
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//
//  This file is part of VirtualFluids. VirtualFluids 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.
//
//  VirtualFluids 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 VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
//
//! \file TriangularMesh.h
//! \ingroup geometries
//! \author Soeren Peters, Stephan Lenz, Martin Schoenherr
//=======================================================================================
#ifndef TriangularMesh_h
#define TriangularMesh_h

#include <vector>
#include <string>
#include <memory>
#include "global.h"

#include "geometries/Triangle/Triangle.h"
#include "geometries/BoundingBox/BoundingBox.h"

#include "geometries/Object.h"

class GeometryMemento;
class GbTriFaceMesh3D;

enum class DiscretizationMethod { RAYCASTING, POINT_IN_OBJECT, POINT_UNDER_TRIANGLE };


class TriangularMesh : public Object
{
public:

    GRIDGENERATOR_EXPORT static TriangularMesh* make(const std::string& fileName, const std::vector<uint> ignorePatches = std::vector<uint>());
    GRIDGENERATOR_EXPORT TriangularMesh();
    GRIDGENERATOR_EXPORT TriangularMesh(const std::string& inputPath, const std::vector<uint> ignorePatches = std::vector<uint>());
    GRIDGENERATOR_EXPORT TriangularMesh(const std::string& inputPath, const BoundingBox &box);
    GRIDGENERATOR_EXPORT ~TriangularMesh() override = default;

    GRIDGENERATOR_EXPORT uint getNumberOfTriangles() const;

    GRIDGENERATOR_EXPORT void setTriangles(std::vector<Triangle> triangles);
    GRIDGENERATOR_EXPORT void setMinMax(BoundingBox minmax);

    std::vector<Triangle> triangleVec;
    Triangle *triangles = nullptr;
    long size = 0;
    BoundingBox minmax;

    SPtr<GbTriFaceMesh3D> VF_GbTriFaceMesh3D;

    GRIDGENERATOR_EXPORT bool operator==(const TriangularMesh &geometry) const;

    GRIDGENERATOR_EXPORT void findNeighbors();

    GRIDGENERATOR_EXPORT GbTriFaceMesh3D* getGbTriFaceMesh3D() const;

    GRIDGENERATOR_EXPORT void generateGbTriFaceMesh3D();

private:

    void initalizeDataFromTriangles();

    static std::vector<Vertex> getAverrageNormalsPerVertex(std::vector<std::vector<Triangle> > trianglesPerVertex);
    static void eliminateTriangleswithIdenticialNormal(std::vector<Triangle> &triangles);

public:
    SPtr<Object> clone() const override;
    double getX1Centroid() override { throw "Not implemented in TriangularMesh"; }
    double getX1Minimum() override { return minmax.minX; }
    double getX1Maximum() override { return minmax.maxX; }
    double getX2Centroid() override { throw "Not implemented in TriangularMesh"; }
    double getX2Minimum() override { return minmax.minY; }
    double getX2Maximum() override { return minmax.maxY; }
    double getX3Centroid() override { throw "Not implemented in TriangularMesh"; }
    double getX3Minimum() override { return minmax.minZ; }
    double getX3Maximum() override { return minmax.maxZ; }
    void changeSizeByDelta(double delta) override;
    bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset,
        const double& maxOffset) override {
        return false;
    }
    
    void findInnerNodes(SPtr<GridImp> grid) override;
};



#endif