HighlightCallback.h

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#pragma once

#include <osg\NodeCallback>
#include <osg\Material>
#include "Export"

namespace vreckoUtils
{

class VRECKO_UTILS_EXPORT HighlightCallback : public osg::NodeCallback
{

public:
    HighlightCallback(double increment) 
        : _dirty(false), _highlighted(false) { setIncrementValue(increment); }

    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);

    inline double getIncrementValue() const { return _increment; }
    inline void setIncrementValue(double val) { _increment = val; _incrementVec = osg::Vec4(val, val, val, 0); }
    inline bool getHighlighted() const { return _highlighted; }
    inline void setHighlighting(bool val) { if(val != _highlighted) _dirty = !_dirty; _highlighted = val; }   
    inline void switchHighlighting() { setHighlighting(!getHighlighted()); }

protected:
    bool _highlighted;
    bool _dirty;
    double _increment;    
    osg::Vec4 _incrementVec;
    osg::ref_ptr<osg::Vec4Array> _origColors;
};

}