meshing/remeshing/main.cxx

Refer to the Remeshing Example.

// ****************************************************************************
// $Id$
//
//
// This file is part of the CAD Exchanger software.
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// You may use this file under the terms of the BSD license as follows:
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// ****************************************************************************
#include <iostream>
#include <vector>
#include <stack>
#include <unordered_map>
using namespace std;
class MeshReplacementVisitor : public ModelData_Model::VoidElementVisitor
{
public:
bool VisitEnter (const ModelData_Instance& theInstance) override
{
myInstances.push(theInstance);
return true;
}
void VisitLeave (const ModelData_Instance& /*theInstance*/) override
{
myInstances.pop();
}
void operator() (const ModelData_Part& thePart) override
{
if (thePart.BRepRepresentation().IsNull()) {
return;
}
if (myReplacedParts.find (thePart) != myReplacedParts.end() && myInstances.size() > 0) {
myInstances.top().SetReference (myReplacedParts[thePart]);
return;
}
ModelData_Part aNewPart (thePart.BRepRepresentation(), thePart.Name());
aNewPart.SetAppearance (thePart.Appearance());
for (ModelData_SceneGraphElement::LayerIterator anIt (thePart); anIt.HasNext();) {
}
ModelAlgo_BRepMesherParameters aMesherParams (ModelAlgo_BRepMesherParameters::Granularity::Fine);
ModelAlgo_BRepMesher aMesher (aMesherParams);
aMesher.Compute (aNewPart);
if (myInstances.empty()) {
myRootReplacements[thePart] = aNewPart;
} else {
myReplacedParts[thePart] = aNewPart;
myInstances.top().SetReference (aNewPart);
}
}
const unordered_map <ModelData_Part, ModelData_Part, ModelData_BaseObjectHash>& RootReplacements() const
{
return myRootReplacements;
}
private:
stack <ModelData_Instance> myInstances;
unordered_map <ModelData_Part, ModelData_Part, ModelData_BaseObjectHash> myRootReplacements;
unordered_map <ModelData_Part, ModelData_Part, ModelData_BaseObjectHash> myReplacedParts;
};
int main (int argc, char *argv[])
{
return 1;
}
if (argc != 3) {
cerr << "Usage: " << argv[0] << " <input_file> <output_file>, where:" << endl;
cerr << " <input_file> is a name of the SLD file to be read" << endl;
cerr << " <output_file> is a name of the VRML file to be saved" << endl;
return 1;
}
const char* aSource = argv[1];
cout << "Conversion started..." << endl;
cerr << "Failed to read the file " << aSource << endl;
return 1;
}
// Making a model data
cerr << "Failed to transfer model data to specified format" << endl;
return 1;
}
MeshReplacementVisitor aVisitor;
aModel.Accept (aVisitor);
vector <ModelData_SceneGraphElement> aNewRoots;
for (ModelData_Model::ElementIterator anIt (aModel); anIt.HasNext();) {
ModelData_SceneGraphElement aRoot = anIt.Next();
if (aRoot.TypeId() == ModelData_Part::GetTypeId()) {
const ModelData_Part* aRootPart = static_cast <ModelData_Part*> (&aRoot);
auto aNewRootIt = aVisitor.RootReplacements().find (*aRootPart);
assert (aNewRootIt != aVisitor.RootReplacements().end());
aNewRoots.push_back (aNewRootIt->second);
} else {
aNewRoots.push_back (aRoot);
}
}
aModel.Clear();
for (auto& aRoot : aNewRoots) {