meshing/mesh_generation/main.cxx

Refer to the Mesh Generation Example.

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// $Id$
//
// Copyright (C) 2008-2014, Roman Lygin. All rights reserved.
// Copyright (C) 2014-2024, CADEX. All rights reserved.
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#ifndef _USE_MATH_DEFINES
#define _USE_MATH_DEFINES
#endif
 
#include <cadex/LicenseManager_Activate.h>
#include <cadex/ModelAlgo/MeshGenerator.hxx>
#include <cadex/ModelData/Body.hxx>
#include <cadex/ModelData/Face.hxx>
#include <cadex/ModelData/Model.hxx>
#include <cadex/ModelData/ModelReader.hxx>
#include <cadex/ModelData/Part.hxx>
#include <cadex/ModelData/ShapeIterator.hxx>
 
#include <cmath>
#include <iostream>
 
#include "../../mtk_license.cxx"
 
using namespace std;
using namespace cadex;
 
class FirstFaceGetter : public ModelData::ModelElementVoidVisitor
{
public:
    void operator() (const ModelData::Part& thePart) override
    {
        if (myFace.IsNull()) {
            ExploreBRep (thePart.Bodies());
        }
    }
 
    const ModelData::Face& FirstFace()
    {
        return myFace;
    };
 
private:
    void ExploreBRep (const std::vector<ModelData::Body>& theBodies)
    {
        for (const auto& aBody : theBodies) {
            ModelData::ShapeIterator aFaceIt (aBody, ModelData::ShapeType::Face);
            if (aFaceIt.HasNext()) {
                const auto& aFirstShape = aFaceIt.Next();
                const auto& aFirstFace = ModelData::Face::Cast (aFirstShape);
                myFace = aFirstFace;
                break;
            }
        }
    };
 
    ModelData::Face myFace;
};
 
void PrintFaceTriangulationInfo (const ModelData::Face& theFace)
{
    ModelData::IndexedTriangleSet anITS = theFace.Triangulation();
 
    cout << "Face triangulation contains " << anITS.NumberOfTriangles() << " triangles." << endl;
 
    const size_t aNumberOfTrianglesToPrint = std::min (size_t (4), anITS.NumberOfTriangles());
 
    for (size_t i = 0; i < aNumberOfTrianglesToPrint; ++i) {
        cout << "Triangle index " << i << " with vertices: " << endl;
        for (size_t j = 0; j < 3; ++j) {
            auto aVertexIndex = anITS.TriangleVertexIndex (i, j);
            cout << "  Vertex index " << aVertexIndex << " with coords (";
            auto aPoint = anITS.TriangleVertex (i, j);
            cout << "X: " << aPoint.X() << ", ";
            cout << "Y: " << aPoint.Y() << ", ";
            cout << "Z: " << aPoint.Z() << ")" << endl;
        }
    }
}
 
int main (int argc, char* argv[])
{
    auto aKey = MTKLicenseKey::Value();
 
    // Activate the license (aKey must be defined in mtk_license.cxx)
    if (!CADExLicense_Activate (aKey)) {
        cerr << "Failed to activate Manufacturing Toolkit license." << endl;
        return 1;
    }
 
    if (argc != 2) {
        cerr << "Usage: " << argv[0] << " <input_file>, where:" << endl;
        cerr << "    <input_file> is a name of the file to be read" << endl;
        return 1;
    }
 
    const char* aSource = argv[1];
 
    ModelData::Model aModel;
    ModelData::ModelReader aReader;
    if (!aReader.Read (aSource, aModel)) {
        cerr << "Failed to read the file " << aSource << endl;
        return 1;
    }
 
    // Set up mesher and parameters:
    ModelAlgo::MeshGeneratorParameters aParam;
    aParam.SetAngularDeflection (M_PI * 10 / 180);
    aParam.SetChordalDeflection (0.003);
 
    ModelAlgo::MeshGenerator aMesher (aParam);
    aMesher.Generate (aModel);
 
    FirstFaceGetter aVisitor;
    aModel.Accept (aVisitor);
 
    ModelData::Face aFace = aVisitor.FirstFace();
    PrintFaceTriangulationInfo (aFace);
 
    return 0;
}