//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.

#ifndef OSGUTIL_RENDERSTAGELIGHTING
#define OSGUTIL_RENDERSTAGELIGHTING 1

#include <osg/Object>
#include <osg/Light>
#include <osg/State>

#include <osgUtil/RenderLeaf>
#include <osgUtil/RenderGraph>

namespace osgUtil {

/**
 * RenderBin base class.
 */
class OSGUTIL_EXPORT RenderStageLighting : public osg::Object
{
    public:
    

        RenderStageLighting();
        virtual osg::Object* clone() const { return new RenderStageLighting(); }
        virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const RenderStageLighting*>(obj)!=0L; }
        virtual const char* className() const { return "RenderStageLighting"; }

        virtual void reset();
        
        enum Mode {
            HEADLIGHT, // default
            SKY_LIGHT,
            NO_SCENEVIEW_LIGHT
        };

        void setLightingMode(Mode mode) { _lightingMode=mode; }
        Mode getLightingMode() const { return _lightingMode; }

        void setLight(osg::Light* light) { _light = light; }
        osg::Light* getLight() { return _light.get(); }
        const osg::Light* getLight() const { return _light.get(); }

        typedef std::pair< osg::Light*, osg::ref_ptr<osg::Matrix> >     LightMatrixPair;
        typedef std::vector< LightMatrixPair >                          LightList;

        virtual void addLight(osg::Light* light,osg::Matrix* matrix)
        {
            _lightList.push_back(LightMatrixPair(light,matrix));
        }

        virtual void draw(osg::State& state,RenderLeaf*& previous);
        
    public:
        
        Mode                     _lightingMode;
        osg::ref_ptr<osg::Light> _light;
        LightList                _lightList;

        
    protected:
    
        virtual ~RenderStageLighting();

};

};

#endif