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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) 2014-2022, 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
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// ****************************************************************************
#include <cadex/LicenseManager_Activate.h>
#include <cadex/ModelData_IndexedTriangleSet.hxx>
#include <cadex/ModelData_Model.hxx>
#include <cadex/ModelData_ModelReader.hxx>
#include <cadex/ModelData_ModelWriter.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 <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];
// Opening and converting the file
if (!aReader.Read (aSource, aModel)) {
cerr << "Failed to open and convert the file " << aSource << 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 (!ModelData_ModelWriter().Write (aModel, aDest)) {
cerr << "Failed to write the file " << aDest << endl;
return 1;
};
return 0;
}
const Base_UTF16String & Name() const
Returns a model name.
Definition: ModelData_Model.cxx:251
Defines a polygonal shape consisting of triangles.
Definition: ModelData_IndexedTriangleSet.hxx:34
Generates a new model with simplified mesh.
Definition: ModelSimplifier_MeshSimplifier.hxx:34
ModelData_Model Perform(const ModelData_Model &theSource)
Performs mesh simplification.
Definition: ModelSimplifier_MeshSimplifier.cxx:77
void Accept(RepresentationVisitor &theVisitor) const
Accepts a visitor of the associated representations.
Definition: ModelData_Part.cxx:367
Provides CAD Exchanger data model.
Definition: ModelData_Model.hxx:40
bool IsOfType() const
Returns true if the object has a type T.
Definition: ModelData_BaseObject.hxx:57
Element visitor with empty implementation.
Definition: ModelData_Model.hxx:106
Reads any format that CAD Exchanger can import.
Definition: ModelData_ModelReader.hxx:31
Defines polygonal (faceted or tessellated) representation of part.
Definition: ModelData_PolyRepresentation.hxx:38
const ModelData_PolyShapeList & Get() const
Returns poly shapes comprising the representation.
Definition: ModelData_PolyRepresentation.cxx:398
bool Read(const Base_UTF16String &theFilePath, ModelData_Model &theModel)
Reads the file at the specified path into the specified model.
Definition: ModelData_ModelReader.cxx:135
Definition: ModelSimplifier_MeshSimplifierParameters.hxx:33
void SetParameters(const ModelSimplifier_MeshSimplifierParameters &theParameters)
Definition: ModelSimplifier_MeshSimplifier.cxx:84
Writes any format that CAD Exchanger can export.
Definition: ModelData_ModelWriter.hxx:31
Defines classes, types, and global functions related to CAD Exchanger.
Definition: A3DSTestLib.hxx:22
void Accept(ElementVisitor &theVisitor) const
Accepts a visitor.
Definition: ModelData_Model.cxx:539
void SetDegreeOfSimplification(DegreeOfSimplificationType theValue)
Sets the desired level of simplification.
Definition: ModelSimplifier_MeshSimplifierParameters.cxx:55
Defines classes, types, and global functions related to standard C++ library.
Base class for polygonal meshes.
Definition: ModelData_PolyShape.hxx:25
Defines a leaf node in the scene graph hiearchy.
Definition: ModelData_Part.hxx:34