/* -*-c++-*- OpenSceneGraph - Copyright (C) Sketchfab
 *
 * This application is open source and may be redistributed and/or modified
 * freely and without restriction, both in commercial and non commercial
 * applications, as long as this copyright notice is maintained.
 *
 * This application is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
*/

#ifndef GEOMETRY_UNIQUE_VISITOR_H
#define GEOMETRY_UNIQUE_VISITOR_H

#include <osg/NodeVisitor>
#include <osg/Geometry>
#include <osg/Geode>

#include <set>
#include <string>

#include "StatLogger"


class GeometryUniqueVisitor : public osg::NodeVisitor {
public:
    GeometryUniqueVisitor(const std::string label=std::string("GeometryUniqueVisitor")):
        osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
        _logger(formatStatLabel(label))
    {}

    virtual void apply(osg::Geode& geode){
        for (unsigned int i = 0; i < geode.getNumDrawables(); i++) {
            apply(*geode.getDrawable(i));
        }
    }

    virtual void apply(osg::Drawable& drawable){
        osg::Geometry* geometry = drawable.asGeometry();
        if (!geometry || isProcessed(geometry)) {
            return;
        }
        apply(*geometry);
    }

    virtual void apply(osg::Geometry& /*geometry*/) {} // to be implemented by actual visitors

protected:
    bool isProcessed(osg::Geometry* node) {
        return _processed.find(node) != _processed.end();
    }

    void setProcessed(osg::Geometry* node) {
        _processed.insert(node);
    }

    std::string formatStatLabel(const std::string& label) const {
        return label + "::apply(..)";
    }

    std::set<osg::Geometry*> _processed;
    StatLogger _logger;
};

#endif