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introduction
This is an example where we define MyMemReleaser by deriving MemReleaser, an existing X3DProcessor which deletes the default X3DNodes and X3DGLNodes. We want here to print the name of the nodes deleted.
deriving MemReleaserAbstractVisitor
The name of the node is an attribute of X3DAbstractNode, so we only need to define the function enterX3DAbstractNode of a AbstractVisitor called MyMemReleaserAbstractVisitor. We also add the definition of an enterCylinder function to show the validation of functions. Cylinder doesn't belong to the Abstract component, so there will be an error message.
deriving MemReleaser
We derive the X3DProcessor MemReleaser in MyMemReleaser. We have then to plug MyMemReleaserAbstractVisitor to MyMemReleaser in the constructor.
code
MyMemReleaserAbstractVisitor.h
#ifndef MYMEMRELEASERABSTRACTVISITOR_H
#define MYMEMRELEASERABSTRACTVISITOR_H
#include <X3DTK/kernel.h>
namespace X3DTK {
class MyMemReleaserAbstractVisitor : public MemReleaserAbstractVisitor
{
public:
MyMemReleaserAbstractVisitor();
virtual void enterX3DAbstractNode(X3DAbstractNode *N) const;
virtual void enterCylinder(X3D::Cylinder *C) const;
};
}
#endif
MyMemReleaserAbstractVisitor.cpp
#include "MyMemReleaserAbstractVisitor.h"
#include <iostream>
using namespace X3DTK;
using namespace std;
MyMemReleaserAbstractVisitor::MyMemReleaserAbstractVisitor()
: MemReleaserAbstractVisitor()
{
defineNewEnterFunction<MyMemReleaserAbstractVisitor, X3DAbstractNode>(&MyMemReleaserAbstractVisitor::enterX3DAbstractNode);
defineNewEnterFunction<MyMemReleaserAbstractVisitor, X3D::Cylinder>(&MyMemReleaserAbstractVisitor::enterCylinder);
}
void MyMemReleaserAbstractVisitor::enterX3DAbstractNode(X3DAbstractNode *N) const
{
cout << N->getTypeName() << " released " << endl;
MemReleaserAbstractVisitor::enterX3DAbstractNode(N);
}
void MyMemReleaserAbstractVisitor::enterCylinder(X3D::Cylinder *C) const
{
}
MyMemReleaser.h
#ifndef MYMEMRELEASER_H
#define MYMEMRELEASER_H
#include <X3DTK/kernel.h>
namespace X3DTK {
class MyMemReleaser : public MemReleaser
{
public:
MyMemReleaser();
};
}
#endif
MyMemReleaser.cpp
#include "MyMemReleaser.h"
#include "MyMemReleaserAbstractVisitor.h"
#include <iostream>
using namespace std;
using namespace X3DTK;
MyMemReleaser::MyMemReleaser()
: MemReleaser()
{
setComponentVisitor(new MyMemReleaserAbstractVisitor());
}
main.cpp
#include "MyMemReleaser.h"
#include <X3DTK/kernel.h>
#include <iostream>
using namespace X3DTK;
using namespace std;
int main(int argc, char *argv[])
{
if (argc <= 1)
{
cerr << "usage: mymemreleaser input" << endl;
exit(0);
}
X3DLoader *loader = new DefaultLoader();
MemReleaser *releaser = new MyMemReleaser();
X3D::Scene *s = loader->load(argv[1]);
releaser->release(s);
return 1;
}
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