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advgeom/meshsimplify/main.cxx

Refer to the Mesh Simplification Example.

// ****************************************************************************
// $Id$
//
// Copyright (C) 2008-2014, Roman Lygin. All rights reserved.
// Copyright (C) 2014-2020, CADEX. All rights reserved.
//
// This file is part of the CAD Exchanger software.
//
// You may use this file under the terms of the BSD license as follows:
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// ****************************************************************************
#include <cadex/LicenseManager_Activate.h>
#include <cadex/ModelData_IndexedTriangleSet.hxx>
#include <cadex/ModelData_Model.hxx>
#include <cadex/ModelData_Part.hxx>
#include <cadex/ModelData_PolyRepresentation.hxx>
#include <cadex/ModelData_PolyShape.hxx>
#include <cadex/ModelData_PolyShapeList.hxx>
#include <cadex/ModelSimplifier_MeshSimplifier.hxx>
#include <cadex/ModelSimplifier_MeshSimplifierParameters.hxx>
#include <cadex/VRML_Reader.hxx>
#include <iostream>
#include "../../cadex_license.cxx"
using namespace std;
using namespace cadex;
class TriangleCounter : public ModelData_Model::VoidElementVisitor
{
public:
class PolyRepExplorer : public ModelData_Part::VoidRepresentationVisitor
{
public:
void operator() (const ModelData_PolyRepresentation& theRep) override
{
const auto& aShapeList = theRep.Get();
for (size_t i = 0; i < aShapeList.Size(); i++) {
ModelData_PolyShape aShape = aShapeList.Element (i);
const auto& anITS = static_cast <const ModelData_IndexedTriangleSet&> (aShape);
myNumberOfTriangles += anITS.NumberOfFaces();
}
}
}
size_t myNumberOfTriangles = 0;
};
void operator() (const ModelData_Part& thePart) override
{
PolyRepExplorer aRepExplorer;
thePart.Accept (aRepExplorer);
myNumberOfTriangles += aRepExplorer.myNumberOfTriangles;
}
size_t NumberOfTriangles() const
{ return myNumberOfTriangles; }
private:
size_t myNumberOfTriangles = 0;
};
int main (int argc, char *argv[])
{
auto aKey = LicenseKey::Value();
// Activate the license (aKey must be defined in cadex_license.cxx)
if (!CADExLicense_Activate (aKey)) {
cerr << "Failed to activate CAD Exchanger license." << endl;
return 1;
}
if (argc != 3) {
cerr << "Usage: " << argv[0] << " <input_file> <output_file>, where:" << endl;
cerr << " <input_file> is a name of the VRML file to be read" << endl;
cerr << " <output_file> is a name of the XML file to be saved" << endl;
return 1;
}
const char* aSource = argv[1];
const char* aDest = argv[2];
VRML_Reader aReader;
// Reading the file
if (!aReader.ReadFile (aSource)) {
cerr << "Failed to read the file " << aSource << endl;
return 1;
}
// Making a model data
if (!aReader.Transfer (aModel)) {
cerr << "Failed to transfer model data to specified format" << endl;
return 1;
}
// Basic info about model
TriangleCounter aBeforeCounter;
aModel.Accept (aBeforeCounter);
cout << "Model name: " << aModel.Name() << endl;
cout << "# of triangles before: " << aBeforeCounter.NumberOfTriangles() << endl;
// Running the simplifier
aParams.SetDegreeOfSimplification (ModelSimplifier_MeshSimplifierParameters::High);
aSimplifier.SetParameters (aParams);
ModelData_Model aNewModel = aSimplifier.Perform (aModel);
// How many triangles does simplified model contain?
TriangleCounter anAfterCounter;
aNewModel.Accept (anAfterCounter);
cout << "# of triangles after: " << anAfterCounter.NumberOfTriangles() << endl;
// Saving the simplified model
if (!aNewModel.Save (aDest)) {
cerr << "Failed to write the file " << aDest << endl;
return 1;
};
return 0;
}