#ifndef OSG_TEXGEN
#define OSG_TEXGEN 1

#include <osg/Export>
#include <osg/GL>
#include <osg/OSG>
#include <osg/Object>

namespace osg {


class Input;
class Output;

class SG_EXPORT TexGen : public Object
{
    public :
    
        enum TexGenMode {
            OBJECT_LINEAR = GL_OBJECT_LINEAR,
            EYE_LINEAR    = GL_EYE_LINEAR,
            SPHERE_MAP    = GL_SPHERE_MAP
        };

        TexGen( void );
        static TexGen* instance();
        virtual Object* clone() const { return new TexGen(); }
        virtual bool isSameKindAs(Object* obj) { return dynamic_cast<TexGen*>(obj)!=NULL; }
        virtual const char* className() const { return "TexGen"; }

        static void enable( void );
        static void disable( void );
        
        void apply( void );

        void setMode( TexGenMode mode ) { _mode = mode; }

    protected :

        virtual ~TexGen( void );

        virtual bool readLocalData(Input& fr);
        virtual bool writeLocalData(Output& fw);

        bool matchModeStr(const char* str,TexGenMode& mode);
        const char* getModeStr(TexGenMode mode);

        TexGenMode _mode;

};

};

#endif